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AD7699BCPZ - 16-Bit 8-Ch 500kSPS SAR ADC | Analog Devices
AD7699BCPZ

AD7699BCPZ - 16-Bit 8-Ch 500kSPS SAR ADC | Analog Devices

The AD7699BCPZ is a 16-bit, 8-channel, 500 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It operates from a single 5V supply and features a charge redistribution architecture with no missing codes. The device is available in a 20-lead LFCSP (4x4 mm) package, making it suitable for space-constrained industrial and instrumentation designs. An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values for processing by digital systems. The AD7699 is a SAR ADC, which uses a binary search algorithm to approximate the input voltage with high speed and accuracy. SAR ADCs are widely used in data acquisition systems, motor control, and medical instrumentation due to their excellent balance of speed, resolution, and power consumption. Key features of the AD7699BCPZ include 16-bit resolution with no missing codes, an 8-channel multiplexer with unipolar single-ended, differential (GND sense), and pseudobipolar input modes, and a throughput of 500 kSPS. It offers an INL of ±0.5 LSB typical and ±1.5 LSB maximum (±23 ppm of FSR), ensuring high linearity for precision measurements. The device also features a dynamic range of [DATA_NEEDED: dynamic range] and operates over a temperature range of -40°C to +125°C. The AD7699 uses a charge redistribution SAR architecture with an internal track-and-hold circuit, providing accurate sampling without external sample-and-hold components. It includes a flexible serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSPs, simplifying integration with microcontrollers and FPGAs. The device also offers a busy indicator and a conversion result readback feature, enhancing system design flexibility. Typical applications include multichannel data acquisition systems, industrial process control, medical instrumentation, and battery-powered portable devices. The AD7699's low power consumption and small package make it ideal for these applications, where board space and power efficiency are critical. When designing with the AD7699BCPZ, ensure proper decoupling of the VDD and VIO pins with 0.1 µF and 10 µF capacitors, and provide a clean reference voltage to achieve specified performance. The analog input range should be set according to the selected input mode, and the reference voltage should be stable and low-noise for optimal SNR.

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AD7703AR - 20-Bit Sigma-Delta ADC, SOIC-20 | Analog Devices
AD7703AR

AD7703AR - 20-Bit Sigma-Delta ADC, SOIC-20 | Analog Devices

The Analog Devices AD7703AR is a 20-bit sigma-delta analog-to-digital converter (ADC) in a 20-pin SOIC (AR suffix) package, offering a single differential input channel with serial output and a maximum output data rate of 4 kSPS at the specified master clock frequency (one distributor listing states up to 16 kSPS; per the Analog Devices AD7703 datasheet the nominal line rate is 4 kSPS). A sigma-delta ADC is a type of oversampling converter that digitizes an analog input by integrating it at a very high sampling rate and then decimating the result with a digital filter. Within the data-conversion hierarchy, the AD7703 sits above general-purpose successive-approximation ADCs in resolution, trading conversion speed for extremely high precision, and belongs to Analog Devices' LC2MOS (linear-compatible CMOS) data-acquisition family. Key features include 20-bit resolution with no missing codes, self-calibration and system calibration modes that remove offset and gain error, and a flexible serial interface that supports both internal and external clocking. Because the digital sinc filter shapes the noise floor, the device achieves effective performance that discrete multi-stage designs cannot match without extensive trimming. The LC2MOS process combines precision analog circuitry with low-power CMOS logic on one die. All dynamic characteristics, including input sampling frequency, output data rate, filter response, and calibration time, scale directly with the master clock f_CLKIN, as stated in the Analog Devices AD7703 datasheet (Rev. F), allowing designers to trade speed against filter settling and noise. Typical applications include precision transducer measurement (thermocouples, RTDs, load cells), weigh-scale front ends, industrial process-control data loggers, and instrumentation requiring resolution beyond 16 bits, where the sigma-delta architecture and on-chip calibration reduce external signal-conditioning complexity. Design consideration: allow full settling time after any calibration or input step; the digital filter's long impulse response means a single conversion immediately after a transient does not reflect the new input value. This page synthesizes distributor pricing, same-family drop-in grading alternatives, and practical design notes not consolidated in the manufacturer datasheet. Pricing and stock referenced as of 2026-10-11.

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AD7703AR-REEL - 20-Bit Sigma-Delta ADC, 20-SOIC | Analog Devices
AD7703AR-REEL

AD7703AR-REEL - 20-Bit Sigma-Delta ADC, 20-SOIC | Analog Devices

The Analog Devices AD7703AR-REEL is a 20-bit, single-channel, sigma-delta analog-to-digital converter (ADC) supplied in a 20-pin SOIC (SO-20) wide-body package and shipped on tape-and-reel. It operates from a single +5 V analog supply and a separate +5 V digital supply and converts a true differential analog input into a 20-bit serial output word at a maximum word rate of 4 kSPS. The device uses an on-chip digital filter that delivers >84 dB of 50 Hz mains-power rejection and forms the basis for high-resolution low-bandwidth conversion in instrumentation systems. A sigma-delta ADC is a type of oversampling converter that pushes quantization noise out of the low-frequency band and shapes it toward higher frequencies, where it is removed by a digital decimation filter. The AD7703 family sits within the Analog Devices precision-signal-chain portfolio, which itself belongs to the broader category of data converters (ADC/DAC) and ultimately mixed-signal ICs. Compared with successive-approximation (SAR) converters, sigma-delta parts trade absolute sample rate for resolution and integrated line-rejection, making them well suited to weighing scales, temperature/bridge transducers, and process-control loops where signals vary slowly but must be measured with high accuracy. Key features include 20 effective bits, a ±2.5 V true-differential analog input range, software-selectable unipolar/bipolar modes, an internal calibration controller with self- and system-calibration, and a flexible synchronous serial interface for read/write of the output data and control registers. The calibration engine removes offset and gain errors at both the modulator and the input front-end, allowing the part to retain >18-bit effective resolution over the industrial -40 °C to +85 °C range. The digital filter is configurable for first- and second-order sinc responses, letting the user trade first-notch frequency and settling time for the targeted acquisition rate. Typical applications are sensor signal conditioning for load-cell bridges, RTD and thermocouple cold-junction compensation, industrial weighing instruments, and low-bandwidth data-acquisition front-ends in PLC modules. Because the digital filter attenuates 50 Hz/60 Hz mains pickup, the AD7703 is often used as a stand-alone ADC in EMC-noisy industrial cabinets without additional analog filtering. When designing with this part, decouple both AVdd and DVdd locally with 10 µF + 0.1 µF ceramic capacitors, tie the REF IN/REF OUT pins into a low-TC buffered reference, and keep digital return currents away from the analog ground plane. This page synthesizes distributor pricing, drop-in alternatives, and application notes that go beyond the manufacturer datasheet to support faster board-level decisions.

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AD7705BR-REEL - 16-Bit Sigma-Delta ADC, 2Ch, SOIC-16 | ADI
AD7705BR-REEL

AD7705BR-REEL - 16-Bit Sigma-Delta ADC, 2Ch, SOIC-16 | ADI

The Analog Devices AD7705BR-REEL is a 16-bit, 2-channel fully differential, sigma-delta analog-to-digital converter (ADC) intended for low-frequency measurement applications, housed in a 16-pin SOIC wide-body (7.50 mm) package and shipped on a 1,000-piece tape-and-reel. It accepts low-level input signals directly from a transducer and produces a serial digital output through an SPI/QSPI/MICROWIRE/DSP-compatible 3-wire interface. Key features include 16-bit resolution with no missing codes, +/-0.003% nonlinearity, less than 600 nV rms noise, a programmable-gain front end with gains from 1 to 128, on-chip digital filtering, and on-chip calibration that removes zero-scale and full-scale errors as well as temperature drift. Two fully differential input channels are multiplexed into the sigma-delta modulator and digital filter, providing effective resolution up to 16 bits at lower output update rates. The AD7705BR-REEL operates from a single 2.7 V to 3.3 V supply or a 4.75 V to 5.25 V supply, drawing only 1 mW of power at 3 V - making it attractive for loop-powered industrial transmitters. The sigma-delta architecture inherently shapes quantization noise away from the signal band, delivering excellent normal-mode rejection of 50 Hz/60 Hz mains interference when the output data rate is programmed to match the notch frequency. Typical applications include weigh scales, pressure transducers, RTD/strain-gauge signal conditioning, industrial process control, temperature measurement, and portable battery-powered instrumentation. The 3-wire serial interface simplifies isolation barrier design in 4-20 mA smart transmitters and lets a low-cost microcontroller configure the part and read conversion data. When designing with this part, decouple AVDD and DVDD separately with 0.1 uF capacitors placed as close to the pins as possible, and choose the output data rate (and master clock) to align the digital filter notch with 50 Hz or 60 Hz interference. The unbuffered analog input mode requires external input buffers when source impedance exceeds the value listed in the datasheet - see the input buffering section for resistor sizing.

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AD7707BRUZ-REEL - 16-Bit Sigma-Delta ADC | Analog Devices
AD7707BRUZ-REEL

AD7707BRUZ-REEL - 16-Bit Sigma-Delta ADC | Analog Devices

The Analog Devices AD7707BRUZ-REEL is a 16-bit, 3-channel sigma-delta analog-to-digital converter (ADC) housed in a 20-pin TSSOP package for low-frequency measurement applications. It accepts low-level transducer signals directly or high-level ±10 V signals, delivers 16-bit no-missing-code performance, ±0.003% accuracy, and on-chip calibration that eliminates zero-scale and full-scale endpoint errors including temperature-drift effects. A sigma-delta ADC is a converter architecture that uses oversampling and noise-shaping to achieve high resolution at low bandwidth; the AD7707 is part of that converter family, which sits within the broader analog-to-digital converter (ADC) category, itself a sub-category of data-conversion ICs and of the larger power management and signal-chain semiconductor hierarchy. The sigma-delta topology enables the AD7707 to integrate a digital filter, programmable gain amplifier, and reference circuitry on a single chip, removing the need for external signal-conditioning components in most thermocouple, strain-gauge, and process-control front ends. Key features include a true 16-bit analog front end with programmable gain amplifier (PGA) for low-level inputs, ±10 V high-level differential inputs, an on-chip digital filter, on-chip calibration, and a low-power 3 V/5 V supply interface. Typical supply current is around 1 mW (3 V/5 V operation), enabling battery-powered measurement instruments without external amplifiers. The serial interface simplifies galvanic isolation, while the 20-TSSOP outline supports compact industrial PC-board layouts. The sigma-delta converter architecture delivers intrinsic monotonicity, low integral non-linearity, and excellent noise immunity due to the modulator's oversampling ratio. The integrated digital filter provides programmable first-notch frequency, allowing trade-offs between output data rate and effective resolution for different transducer bandwidths. Combined with the on-chip PGA, the AD7707 can resolve microvolt-level sensor outputs without additional analog stages. Typical applications include industrial process-control analog front ends, weigh-scale signal conditioning, temperature measurement with thermocouples or RTDs, pressure and flow instrumentation, and battery-powered portable measurement equipment. The ±10 V differential input range also supports general-purpose data-acquisition boards using 4-20 mA loop-powered transducers. When designing with this device, allocate the analog and digital supply pins (AVDD/DVDD) properly and decouple each with a 0.1 µF ceramic capacitor close to the package. Avoid running digital clock traces under the analog input pins to prevent digital-noise coupling into the front-end input. This page synthesises distributor live pricing, drop-in pin-compatible alternatives and practical design notes that consolidate information from the Analog Devices datasheet, DigiKey, Mouser, and the FindIC cross-reference database.

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AD7707BRZ-REEL - 16-Bit Sigma-Delta ADC | Analog Devices
AD7707BRZ-REEL

AD7707BRZ-REEL - 16-Bit Sigma-Delta ADC | Analog Devices

The Analog Devices AD7707BRZ-REEL is a complete 3-channel, 16-bit sigma-delta analog-to-digital converter (ADC) housed in a 20-pin SOIC wide-body (SOIC-20) package. It accepts either low-level transducer signals directly or high-level ±10 V bipolar signals via on-chip input attenuators, and produces a serial digital output. The device operates from a 3 V or 5 V analog supply with typical power dissipation of only 1 mW, making it well suited for low-frequency measurement applications. A sigma-delta ADC is a converter architecture that oversamples the input signal and uses noise-shaping to push quantization noise out of the baseband, achieving excellent resolution and inherent digital filtering for low-frequency measurements. As part of the broader family of precision ADCs, the AD7707 combines analog front-end conditioning, PGA, and digital filtering on a single die — a complete analog front end IC. The device includes on-chip calibration that removes zero-scale and full-scale errors and corrects endpoint drift over temperature. Key specifications include 16-bit resolution with no missing codes, ±0.003% accuracy (effective resolution), and a low input signal rms noise suitable for strain gauge, thermocouple, and RTD front ends. The serial interface allows direct connection to microcontrollers, DSPs, or SPI-compatible controllers. Differential reference inputs and a 3-channel differential/pseudo-differential input mux support gain settings from 1 to 128, allowing direct interface to small-amplitude transducer outputs. The architecture integrates a programmable gain amplifier (PGA), sigma-delta modulator, digital filter, clock generator, and calibration logic on a single CMOS die, eliminating external signal conditioning in many transducer-based designs. The self-calibration modes (self-calibration, system calibration, and background calibration) remove gain and offset errors, while the chop-mode option minimizes drift over time and temperature. Typical applications include industrial process control, weigh scales and load cells, temperature measurement via thermocouples or RTDs, pressure sensors, smart transmitters, and portable instrumentation. The 1 mW power dissipation and 3 V supply make it especially attractive for loop-powered 4-20 mA smart sensors and battery-powered data acquisition. When designing with this device, pay attention to reference voltage stability: the ADC's accuracy is bound by the reference noise and drift. Choose a low-noise, low-drift reference and place it close to the REFIN± pins. Decouple AVDD and DVDD separately with 0.1 µF and 10 µF capacitors. This page synthesizes distributor pricing, drop-in alternative cross-references, and application design notes for engineers evaluating the AD7707BRZ-REEL for low-frequency measurement front ends.

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AD7708BR-REEL - 16-Bit 8/10-Ch Sigma-Delta ADC | Analog Devices
AD7708BR-REEL

AD7708BR-REEL - 16-Bit 8/10-Ch Sigma-Delta ADC | Analog Devices

The Analog Devices AD7708BR-REEL is a 16-bit, 8/10-channel, low-voltage, low-power sigma-delta analog-to-digital converter (ADC) housed in a 28-pin SOIC wide-body package supplied on a 13-inch tape-and-reel. According to the Analog Devices product page, the AD7708 is factory calibrated and provides a single-cycle conversion setting with programmable gain, drawing only microwatts of quiescent power from a 2.7 V to 5.25 V supply. The on-chip digital filter, programmable gain amplifier (PGA) and input multiplexer make the part a one-chip solution for multi-channel low-frequency measurement systems that previously required separate ADCs and external signal conditioning. A sigma-delta ADC is a type of oversampling converter that trades speed for resolution and in-band noise: it samples the analog input at a much higher rate than Nyquist, shapes quantization noise out of the baseband using an internal modulator, then low-pass filters and decimates the resulting bitstream to deliver high effective number of bits (ENOB). Within the broader product hierarchy the AD7708 belongs to the precision ADC family, sitting between general-purpose successive-approximation (SAR) ADCs (lower resolution / higher speed) and 24-bit sigma-delta converters such as the pin-compatible AD7718 (higher resolution, otherwise identical). It also relates to a wider category of low-power precision data-acquisition ICs used in industrial, instrumentation and sensor-interface designs. Key features include factory-calibrated offset and gain (no user trims required), 8 single-ended or 4 fully-differential input channels (software-configurable as 8/10 pseudo-differential inputs), programmable gain from 1 to 128, an SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and on-chip calibration registers. The output update rate is user-programmable, and a low-side chop buffer plus chop-stabilized input front-end minimize input offset drift across temperature. The sigma-delta modulator architecture provides inherent 16-bit noise-free resolution at low update rates while delivering excellent normal-mode rejection at the chosen notch frequency, which is critical when digitizing signals in electrically noisy environments. The integrated PGA allows small sensor signals (e.g., strain-gauge bridges or thermocouples) to be amplified up to 128x before digitization, eliminating external instrumentation amplifiers in many designs. Typical applications include industrial process-control analog input modules, multi-channel temperature measurement (with thermocouple or RTD front ends), weigh scales, portable instrumentation, smart sensor transmitters, and programmable logic controller (PLC) analog front ends. The wide input-voltage range and high common-mode rejection also suit battery-management monitoring and 4-20 mA loop digitization. When designing with the AD7708BR-REEL, ensure that the analog supply (AVDD) is well decoupled with a 10 uF tantalum in parallel with a 0.1 uF ceramic close to the pins, and that the digital supply (DVDD) is similarly bypassed. The reference input REF IN(+) / REF IN(–) should be driven from a low-impedance, low-noise source such as the ADR01 or AD780; reference noise directly translates to output noise. A continuous input current exceeding the absolute maximum will latch the input ESD structure, so a 100 ohm series resistor or external clamping is recommended in harsh environments. This page synthesizes distributor pricing, real drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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AD7708BRU-REEL - 16-Bit 8/10-Ch Sigma-Delta ADC | Analog Devices
AD7708BRU-REEL

AD7708BRU-REEL - 16-Bit 8/10-Ch Sigma-Delta ADC | Analog Devices

The Analog Devices AD7708BRU-REEL is a 16-bit, 8/10-channel, low-voltage, low-power sigma-delta analog-to-digital converter (ADC) supplied in a 28-pin TSSOP package on tape and reel. According to the Analog Devices product page, it operates from a single analog/digital supply of 2.7V to 5.25V and accepts 4 fully-differential or 8/10 pseudo-differential input channels, making it a complete analog front-end for low-frequency measurement applications. It features a serial SPI/MICROWIRE/QSPI-compatible interface and provides factory-calibrated conversion with a programmable gain amplifier (PGA). A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution and excellent noise rejection in low-frequency measurement applications. Within the converter taxonomy, the AD7708 sits in the precision ADC category, which itself falls under data converters and broader mixed-signal integrated circuits. The 1ku list price starting from $6.19 reflects its positioning as a low-cost, multi-channel analog front-end solution for industrial and instrumentation designs. Key features of the AD7708BRU-REEL include 16-bit resolution (the companion AD7718 offers 24-bit), factory calibration per channel, programmable gain amplifier (1 to 128), a single-cycle conversion mode, and a low quiescent current of typically 1 mA in normal operation. The device provides four differential or eight pseudo-differential inputs, plus two additional pins configurable as analog or reference inputs. The flexible input configuration allows direct connection to sensors, bridges, and other low-bandwidth analog sources. Technically, the AD7708 uses a sigma-delta modulator followed by a digital filter, providing excellent 50 Hz/60 Hz power-line noise rejection. The on-chip PGA accepts input signals from a few millivolts up to ±2.56V when using a 2.5V reference, with the reference input accepting standard external references. The serial interface operates in self-clocking or external-clocking mode, simplifying isolation in industrial systems. The architecture is pin-for-pin compatible with the 24-bit AD7718, enabling an upgrade path from 16 to 24 bits without PCB changes. Typical applications include industrial process control, weigh scales and load-cell digitization, portable instrumentation, temperature measurement with RTDs or thermocouples, and pressure sensor signal conditioning. The TSSOP-28 package suits space-constrained designs while the wide supply range supports battery-powered systems. In multi-channel data-acquisition modules, the AD7708's pseudo-differential inputs allow direct connection to bridge sensors without external instrumentation amplifiers. When designing with the AD7708, ensure adequate decoupling on both AVDD and DVDD pins (typically 10uF bulk plus 0.1uF ceramic close to the pins). The reference input should be driven by a low-noise reference such as the ADR291 or AD780 for full 16-bit performance. The serial clock rate and filter notches should be programmed to reject the local mains frequency (50 Hz or 60 Hz) to maximize effective resolution. This page synthesizes distributor pricing, pin-for-pin compatible replacements in the same AD77xx family, and practical design notes not found in the manufacturer datasheet.

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AD7709ARU-REEL - 16-Bit Sigma-Delta ADC w/ Current Sources | Analog Devices
AD7709ARU-REEL

AD7709ARU-REEL - 16-Bit Sigma-Delta ADC w/ Current Sources | Analog Devices

The Analog Devices AD7709ARU-REEL is a 16-bit, low-frequency measurement analog front end that integrates a Sigma-Delta ADC, programmable gain amplifier (PGA), three switchable matched excitation current sources, low-side power switches, and a digital I/O port in a 24-pin TSSOP package supplied on tape and reel. Sigma-Delta ADCs (Σ-Δ ADCs) are a class of analog-to-digital converters that trade raw speed for very high resolution by oversampling the input and shaping quantization noise out of the baseband. They sit above successive-approximation and flash converters in the resolution-vs-speed taxonomy and are the dominant architecture in precision DC, temperature, strain-gauge, and industrial sensor front ends, where update rates from a few Hz to a few kHz suffice and where 16-24 bits of effective resolution can be obtained from inexpensive on-chip digital filtering. Key features include 16-bit resolution, configurable as 2 fully-differential input channels or 4 pseudo-differential input channels, programmable gain (PGA) from 1 to 128 with input ranges spanning 1.024 V to 6.144 V unipolar and ±1.024 V to ±6.144 V bipolar, three matched software-programmable excitation current sources (typically 10 µA, 200 µA, or 1 mA) for RTD/excitation bridges, simultaneous 50 Hz and 60 Hz mains rejection at the 20 Hz output update rate, an SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and a 2.7 V to 5.25 V analog supply range. Architecturally the part combines a switched-capacitor Σ-Δ modulator with a digital sinc³ (sin³) low-pass filter and on-chip calibration registers, achieving effective resolution approaching the 16-bit noise floor while rejecting line-frequency interference - the defining requirement of industrial process-control and weigh-scale designs. The current sources and low-side power switches reduce external discrete count by allowing direct sensor excitation and bridge power management without extra transistors. Typical applications include 4-20 mA industrial process-control loops, weigh scales and load-cell signal conditioning, temperature measurement using RTDs and thermocouples with cold-junction compensation, smart industrial transmitters, flow meters, and battery-cell monitoring where isolated low-bandwidth precision measurement is required. When designing with this ADC, pay close attention to PCB grounding: separate analog and digital grounds must meet only at the AGND/DGND pin of the AD7709 with a star-ground topology; otherwise the high switching currents in the digital interface couple into the analog front end and degrade effective resolution. Bypass the AVDD and DVDD pins individually with 10 µF + 0.1 µF ceramic pairs placed as close as possible to the package pins. This page synthesizes distributor inventory, drop-in pin-compatible alternatives, application reference designs, and practical PCB-layout notes not aggregated in the manufacturer datasheet.

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AD7709BRU-REEL - 16-Bit Sigma-Delta ADC | Analog Devices
AD7709BRU-REEL

AD7709BRU-REEL - 16-Bit Sigma-Delta ADC | Analog Devices

The Analog Devices AD7709BRU-REEL is a 16-bit, low-frequency, multi-channel sigma-delta analog-to-digital converter (ADC) with switchable current sources, switchable reference inputs, and an integrated I/O port, offered in a 24-pin TSSOP (RU) package on tape-and-reel packaging. The device is configured as either two fully-differential input channels or four pseudo-differential input channels, with a true 16-bit resolution at the analog input and a maximum output data rate of approximately 105 samples per second. It operates from a single analog supply of 2.7 V to 5.25 V and a digital supply of 2.7 V to 5.25 V. A sigma-delta ADC is a type of oversampling converter that uses a modulator followed by a digital decimation/sinc filter to achieve high effective resolution at low bandwidth. The AD7709 family belongs to the ADC IC product hierarchy (sigma-delta ADC -> ADC -> data converter -> signal chain IC -> semiconductor). It is functionally a complete analog front-end, integrating the modulator, filter, programmable gain amplifier (PGA), reference input switch, calibration logic, and a digital I/O port - a level of integration that historically required several discrete building blocks. Key differentiating specifications include factory-calibrated gain and offset to within +/-0.007 % at 25 degrees C for the on-board references, true 16-bit performance with no missing codes, and integrated excitation current sources that can source 10 microamps, 100 microamps, or 1 milliamp to drive external sensors such as RTDs directly. The device also provides a 14-bit-compatible mode to trade resolution for higher throughput, supports self- and system calibration, and offers a PGA with programmable gains from 1 to 128. Typical applications span industrial process control, weigh scale signal conditioning, temperature measurement with RTD or thermocouple front-ends, pressure and flow transmitters, and medical instrumentation where low-frequency precision is required. The integrated current sources make it especially attractive for transducer excitation applications that previously required separate driver ICs. When designing with the AD7709BRU-REEL, use the on-chip programmable gain amplifier to match the input signal dynamic range to the reference voltage, and prefer the differential input mode for best common-mode rejection. Operate at the lowest practical output data rate to maximize noise-free resolution; the ADC's noise scales inversely with the -3 dB bandwidth of its digital filter. Consult the AD7709 datasheet full register map and application flow before committing to a final software sequence. This page synthesizes distributor stock, drop-in compatible alternatives, and practical design notes not found in a single AD7709 datasheet excerpt alone, accelerating component evaluation for precision low-frequency signal chains.

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AD7710AR-REEL - 24-Bit Sigma-Delta ADC w/ PGA | Analog Devices
AD7710AR-REEL

AD7710AR-REEL - 24-Bit Sigma-Delta ADC w/ PGA | Analog Devices

The Analog Devices AD7710AR-REEL is a 24-bit, charge-balancing sigma-delta analog-to-digital converter with a 2-channel programmable-gain front end, packaged in a 24-pin SOIC (Wide Body, 0.295 in / 7.50 mm) and supplied on a 7-inch tape-and-reel. It accepts low-level bipolar or unipolar signals directly from a transducer or strain gage, performs on-chip gain and offset calibration, and outputs a serial digital word at sampling rates up to 1.028 kSPS through a bidirectional serial port. A sigma-delta ADC is an oversampling converter that uses a modulator and digital filter to achieve very high effective resolution at low bandwidth. It belongs to the precision data-converter family, sitting between successive-approximation ADCs (faster, lower resolution) and integrating ADCs (slower, very high noise rejection). Within Analog Devices' portfolio, sigma-delta converters target low-frequency measurement applications such as weigh scales, industrial process controls, and sensor signal conditioning. Key features include 24 bits with no missing codes, ±0.0015% maximum nonlinearity, differential inputs, programmable gains from 1 to 128, an integrated low-pass digital filter, and a programmable current source for transducer excitation. The bidirectional serial interface allows input-channel selection, gain, polarity, and calibration mode to be configured in software; self-calibration, system calibration, and background calibration modes are supported through on-chip calibration registers. Architecturally, the AD7710 combines an input switching network, a chopper-stabilized PGA, a sigma-delta modulator, and a digital filter on a single CMOS die. The chopper-stabilized front end minimizes drift and 1/f noise, while the digital filter simultaneously provides 50 Hz / 60 Hz power-line rejection, eliminating the need for external filtering on industrial mains frequencies. Typical applications include weigh scales, load-cell/strain-gage signal conditioning, RTD and thermocouple temperature measurement, pressure transducers, flow meters, and 4-20 mA loop-powered industrial sensor transmitters. The on-chip current source and PGA let designers eliminate external instrumentation amplifiers and excitation circuits. When designing with the AD7710, pay attention to analog and digital ground separation, decouple AVDD with a 10 µF tantalum plus 0.1 µF ceramic close to the pin, and reserve sufficient digital-filter settling time after channel or gain changes to avoid erroneous readings. This page synthesizes distributor pricing, drop-in alternative candidates, and practical design notes that complement the Analog Devices datasheet revision G.

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AD7712AR-REEL7 - 24-Bit Sigma-Delta ADC | Analog Devices | SOIC-24
AD7712AR-REEL7

AD7712AR-REEL7 - 24-Bit Sigma-Delta ADC | Analog Devices | SOIC-24

The Analog Devices AD7712AR-REEL7 is a complete analog front-end, low-frequency, dual-channel 24-bit sigma-delta analog-to-digital converter (ADC) in a 24-pin SOIC (Wide) package supplied on 7-inch tape and reel. It accepts either low-level transducer signals directly (with on-chip programmable gain from 1 to 128) or high-level (±4 × VREF) signals, and outputs a serial digital word through a bidirectional serial port. What is a sigma-delta ADC? A sigma-delta (Σ-Δ) converter is a type of analog-to-digital converter that oversamples an input signal and uses noise-shaping to push quantization noise out of the baseband, trading speed for very high resolution and excellent linearity. In the broader taxonomy: ADC -> data converter -> mixed-signal IC -> semiconductor. The AD7712 sits at the signal-conditioning end of this hierarchy, integrating input multiplexers, programmable gain amplifiers (PGAs), digital filtering, and calibration logic so a microcontroller only has to read conversions over a synchronous serial interface. Key features of the AD7712AR-REEL7 include 24-bit no-missing-codes performance, ±0.0015% (15 ppm) integral nonlinearity, charge-balancing conversion, and on-chip self-calibration that nulls offset and gain errors. The low-level input channel features true differential inputs with common-mode rejection, and the high-level input accepts bipolar ±4 × VREF. Conversion rates and output word rates are software-configurable via the serial port, allowing trade-offs between resolution and update rate. Architecturally, the AD7712 uses a switched-capacitor charge-balancing modulator followed by a digital decimation filter. This approach eliminates the need for high-precision external analog components; only a few decoupling capacitors and a precision voltage reference (such as the AD780 or ADR291) are required. The serial interface is compatible with most microcontrollers and DSPs, and the device operates from a single +5 V supply while consuming modest quiescent current for portable instrumentation. Typical applications include weigh scales and load-cell digitizers, industrial process-control transmitters (4-20 mA loops), portable battery-powered instrumentation, smart sensor signal conditioning, and pressure, temperature, or strain-gauge front-ends. The integrated PGA removes the need for external instrumentation amplifiers in most transducer bridges, reducing both BOM cost and PCB area. A key design consideration is reference voltage quality: noise on VREF directly appears as conversion noise, so a low-noise, low-drift reference is essential. Designers should also route analog and digital grounds as a star from the AD7712 and follow ADI's recommended decoupling layout. This page synthesizes distributor pricing, cross-reference drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers evaluate lifecycle, substitution risk, and BOM decisions in one view.

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AD7713AN - 24-Bit Sigma-Delta Signal Conditioning ADC | Analog Devices
AD7713AN

AD7713AN - 24-Bit Sigma-Delta Signal Conditioning ADC | Analog Devices

The Analog Devices AD7713AN is a 24-bit, sigma-delta analog-to-digital converter designed for low-frequency, high-accuracy measurement applications. It integrates a programmable-gain front end, digital filtering, and on-chip calibration, delivering 24-bit resolution at throughput rates suitable for industrial-process control and weigh-scale front ends in a 24-pin plastic DIP package. A sigma-delta ADC is a type of oversampling converter that trades raw sampling speed for very high resolution by pushing quantization noise to high frequencies and then aggressively digital-filtering it away. The AD7713AN belongs to the family of signal-conditioning ADCs that combine the converter with on-chip calibration, programmable gain, and a flexible serial interface. This architecture sits inside the broader hierarchy of data-acquisition ICs -> precision ADCs -> 24-bit sigma-delta converters -> industrial measurement front ends, making it a turnkey front end for bridge sensors, RTDs, and thermocouples in noisy factory environments. Key features include 24-bit no-missing-codes performance, an effective resolution up to 21.5 bits at the 60 Hz output rate, and on-chip self-calibration that removes both offset and gain errors. The analog front end accepts differential or pseudo-differential inputs with software-configurable gains from 1 to 128, and the LC2MOS front-end design maintains low input currents for direct connection to high-impedance sensor bridges. A 150 µW typical power-down mode makes the part attractive for loop-powered and battery-backed instruments. Architecturally the device uses a fourth-order sigma-delta modulator followed by a programmable low-pass digital filter, with the modulator sampling far above the Nyquist rate. The on-chip calibration registers store zero-scale and full-scale correction coefficients, which the user can invoke at any time to compensate for drift caused by temperature or aging, an important advantage over un-calibrated ADCs in long-deployment instrumentation. Typical applications include weigh scales and load-cell readouts, strain-gauge bridges, industrial process-control analog input modules, temperature measurement with RTDs and thermocouples, portable loop-powered 4-20 mA smart transmitters, and chart recorders. The wide dynamic range also suits acoustic and vibration transducers where small signals sit on top of large DC bias. When designing with this device, evaluate the input common-mode voltage carefully because the sigma-delta modulator rejects common-mode noise only within the configured input range; a poorly biased bridge will degrade effective resolution. Provide a clean analog ground and a low-impedance reference - the AD7713AN's accuracy is fundamentally limited by reference noise and PCB layout. This page combines distributor pricing, drop-in alternative parts in the same 24-pin DIP package, and practical design considerations not aggregated on any single distributor page.

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AD7714ARS-5REEL - 24-Bit Sigma-Delta ADC, 28-SSOP | Analog Devices
AD7714ARS-5REEL

AD7714ARS-5REEL - 24-Bit Sigma-Delta ADC, 28-SSOP | Analog Devices

The Analog Devices AD7714ARS-5REEL is a 24-bit sigma-delta analog-to-digital converter with a complete analog front end for low-frequency measurement applications, supplied in a 28-pin SSOP package on tape-and-reel. It accepts low-level signals directly from a transducer and outputs a serial digital word via a three-wire SPI/QSPI/MICROWIRE-compatible interface. The part operates from a single 5 V supply and integrates a charge-balancing ADC with up to 24 bits of no-missing-codes performance and 0.0015% non-linearity. A sigma-delta ADC is a converter architecture that oversamples an input signal, shapes quantization noise out of the signal band, and decimates the high-rate bitstream down to a lower output word rate, achieving very high resolution at the cost of input bandwidth. Within the broader data-converter hierarchy, sigma-delta ADCs sit between precision SAR converters (faster, lower-resolution) and integrating dual-slope ADCs (very slow, very high DC accuracy). The AD7714 is specifically positioned as a complete analog front end: programmable-gain front end, on-chip calibration, and digital filtering are integrated so that a transducer can be connected directly with minimal external signal conditioning. Key specifications include 24-bit resolution with no missing codes, 0.0015% non-linearity, 140 nV rms noise, and a programmable-gain front end supporting gains from 1 to 128 over five input channels. The output data rate is configurable and the part provides self-calibration modes that remove zero-scale and full-scale endpoint errors plus temperature-drift effects. Compared to the original A grade, the Y grade (the -5 suffix) adds Schmitt-trigger inputs on SCLK and DIN, tighter linearity, lower power consumption, and an extended operating temperature range, while being available in a smaller SSOP package. The AD7714 employs a proprietary charge-balancing conversion technique that allows direct connection to strain gauges, RTDs, thermocouples, and other low-level bridge-type transducers. On-chip registers control filter cutoff, input gain, channel selection, signal polarity, and calibration modes. The three-wire serial interface minimizes interconnect lines, which is particularly valuable in isolated front ends because it reduces the number of optocouplers required between the transducer and the host microcontroller or DSP. Typical applications include industrial process control weighing scales, strain-gauge and load-cell signal conditioning, portable battery-powered instrumentation, and isolated 4-20 mA loop digitizers. The low 500 µA supply current makes the part attractive for loop-powered or handheld instruments. Use the AD7714 when you need 20-24 bit effective resolution on DC or slowly-varying signals, integrated PGA gains up to 128, and an SPI-compatible digital interface that interfaces directly to microcontrollers and DSPs.

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AD7714YRU-REEL7 - 24-bit Sigma-Delta ADC, 5-Ch, 24-TSSOP | ADI
AD7714YRU-REEL7

AD7714YRU-REEL7 - 24-bit Sigma-Delta ADC, 5-Ch, 24-TSSOP | ADI

The Analog Devices AD7714YRU-REEL7 is a 24-bit sigma-delta analog-to-digital converter (ADC) with 3/5 input channels, 1 kSPS output rate, and on-chip programmable-gain front end, packaged in a 24-pin TSSOP. The Y-grade version extends the operating temperature range to -40C to +105C and adds Schmitt-trigger inputs on SCLK and DIN compared to the A-grade, with tighter linearity, lower power consumption, and a smaller package footprint. An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Sigma-delta ADCs use oversampling and noise-shaping to achieve very high resolution (16-24 bits) at low sample rates, making them ideal for precision DC and low-frequency measurement applications such as weigh scales, industrial process control, and sensor signal conditioning. Within the IC hierarchy, the AD7714 belongs to the data-converter category, then ADC, then precision sigma-delta ADC, then integrated signal-conditioning ADC. Key features include 24-bit no-missing-code performance, +/-0.0015% nonlinearity, 140 nV rms noise, gains programmable from 1 to 128, and three fully differential or five pseudo-differential input channels. A three-wire serial interface (SPI/QSPI/MICROWIRE-compatible) reduces isolation overhead, and on-chip self-calibration eliminates zero-scale and full-scale errors plus temperature drift. The Y-grade also includes a low-side power switch for bridge-sensor applications. Typical applications include weigh scales, strain-gauge transducers, RTD/thermocouple temperature measurement, industrial process control loops, and portable battery-powered instrumentation. The wide gain range lets a single part digitize both low-level thermocouple signals (tens of microvolts) and 0-10 V industrial signals without external amplifiers. Designers should pay attention to the input common-mode range and avalanche protection; the reference input must remain within the specified common-mode window for the chosen gain. PCB layout should isolate analog and digital grounds with a single-point connection near the ADC. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not directly aggregated on the manufacturer datasheet.

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AD7715ACHIPS-3 - 16-Bit Sigma-Delta ADC, 3V, 450uA | ADI
AD7715ACHIPS-3

AD7715ACHIPS-3 - 16-Bit Sigma-Delta ADC, 3V, 450uA | ADI

The Analog Devices AD7715ACHIPS-3 is a 16-bit, charge-balancing sigma-delta analog-to-digital converter (ADC) supplied as a bare die (CHIPS form), designed to operate from a single 3 V supply with a total current consumption below 450 uA at 1 MHz master clock. The -3 suffix designates the 3 V supply variant, and the CHIPS suffix indicates the unpackaged die form factor that requires hybrid or chip-on-board (COB) assembly by the customer. The device offers 16 bits of resolution with no missing codes, 0.0015% integral nonlinearity, differential analog inputs, a three-wire serial interface (SPI/QSPI/MICROWIRE compatible), and a programmable-gain front end with gains of 1, 2, 32 and 128. What is a sigma-delta ADC? A sigma-delta (ΣΔ) ADC is a class of oversampling converter that trades raw speed for very high resolution by pushing quantization noise out of the signal band using a modulator and a digital filter. Within the broader hierarchy, the AD7715ACHIPS-3 sits in the precision converter category (ADC > sigma-delta ADC > low-frequency precision ADC > data acquisition IC > signal conditioning > power management), and is intended for transducer-based measurements where DC accuracy and noise rejection matter more than throughput. Key features include 16-bit resolution with no missing codes, very low 450 uA supply current at 3 V/1 MHz, a charge-balancing front end that simplifies external antialias filtering, programmable gains up to 128 for direct bridge or thermocouple hookups, and self-calibration options that remove zero-scale and full-scale errors. The differential input pair can accept unipolar or true bipolar input ranges when the part is operated from a 5 V supply rail (AD7715-5 variant). Architecturally, the converter combines a switched-capacitor modulator and a digital filter on a single CMOS die, achieving the same effective resolution as discrete modulator-plus-filter designs at a fraction of the power. The internal calibration registers capture system offset and gain at the user's programmed update rate, allowing the ADC to compensate for front-end drift without processor intervention. Typical applications include weigh scales and load-cell bridges, thermocouple cold-junction compensation, portable industrial instrumentation, and pressure transducer readouts. Because the device is offered in CHIPS (bare-die) form, integrators typically embed it inside custom sensor modules, hybrid microcircuits, or harsh-environment packages where standard PDIP/SOIC would not survive. When designing with this part, pay particular attention to PCB layout for the bare die: bond wires must be short and Kelvin-bonded to the analog inputs to avoid thermocouple-induced offsets. Programming gain to 128 amplifies both signal and noise, so external noise budgeting is critical. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the AD7715ACHIPS-3 not found in any single manufacturer datasheet.

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AD7715ACHIPS-5 - 16-Bit Sigma-Delta ADC, 3V/5V, 450uA | Analog Devices
AD7715ACHIPS-5

AD7715ACHIPS-5 - 16-Bit Sigma-Delta ADC, 3V/5V, 450uA | Analog Devices

The Analog Devices AD7715ACHIPS-5 is a 16-bit, sigma-delta analog-to-digital converter (ADC) operating from 3 V or 5 V supplies with a typical total supply current of 450 uA, supplied in an unpackaged bare die (CHIPS) form factor. It provides one differential or pseudo-differential input channel with on-chip digital filtering, calibration, and a serial interface for microcontroller or DSP readback. A sigma-delta (sigma-delta) ADC is a class of oversampling converter that trades high sampling rate for very high resolution and excellent inherent anti-aliasing behavior; the AD7715 uses this architecture to deliver 16-bit noise-free code performance directly from a low-noise on-chip modulator and digital filter. It sits within the broader hierarchy of data acquisition (DAQ) ICs -> analog-to-digital converters -> precision ADCs -> sigma-delta converters -> semiconductor ICs, making it suitable for systems where DC accuracy and low-frequency noise rejection matter more than raw bandwidth. Key features include a 16-bit (no-missing-codes) guaranteed resolution, low total supply current (450 uA typical at 3 V), on-chip programmable-gain front end supporting input ranges from 0 mV to 20 mV up to 0 V to 2.5 V (with 5 V supply), self-calibration and system-calibration modes, and a flexible 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and most DSP serial ports. The digital filter offers programmable first-notch frequency, allowing the device to trade output data rate for settling time. The device accepts a master clock up to 5 MHz (5 V) or 2.4576 MHz (3 V), enabling output data rates between a few Hz and a few hundred Hz. Its on-chip PGA simplifies transducer interfacing by accepting low-level signals directly without external instrumentation amplifiers. Designers should note that the CHIPS (bare die) variant is intended primarily for hybrid / micro-module assemblies, where wire bonding and die attach are required; commercial PCB designs typically use the AD7715ANZ or AD7715ARZ5 SOIC / PDIP versions. Typical applications include weigh scales and load-cell digitizers, industrial process-control transmitters, portable and battery-powered instrumentation, temperature measurement with bridge or RTD sensors, and smart pressure transmitters. The low 450 uA quiescent current also makes it suitable for loop-powered 4-20 mA sensor transmitters where total system power budget is critical. When designing with this part, attention to grounding and decoupling is essential because the converter's high resolution can otherwise be limited by analog supply noise; place a 0.1 uF decoupling capacitor close to each supply pin and route digital ground return away from the analog input traces. For sensor applications, the PGA gain and output data rate should be selected together because higher PGA gain increases input-referred noise at the modulator output.

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AD7715ARU-5REEL - 16-Bit 450uA Sigma-Delta ADC | Analog Devices
AD7715ARU-5REEL

AD7715ARU-5REEL - 16-Bit 450uA Sigma-Delta ADC | Analog Devices

The Analog Devices AD7715ARU-5REEL is a 16-bit, charge-balancing sigma-delta analog-to-digital converter (ADC) designed for low-frequency, high-precision measurement directly from transducers. The device operates from a single 5 V supply (the -5 suffix variant), draws a maximum of 450 uA of supply current, and integrates a programmable-gain front end with gains of 1, 2, 32, and 128 plus differential input capability. It is housed in a 16-pin TSSOP (RU/RUZ) package supplied on tape-and-reel. A sigma-delta (Σ-Δ) ADC is a type of oversampling converter that uses noise shaping to push quantization noise out of the signal band, trading speed for very high effective resolution and excellent noise rejection without requiring precise external analog anti-alias filters. Within the broader power-tree hierarchy, the AD7715 belongs to the precision data-converter family -> ADC -> sigma-delta ADC -> data acquisition IC -> signal chain IC. The on-chip digital filtering eliminates the need for complex external analog filters, simplifying the front-end analog design and reducing total BOM cost. Key differentiating features include 16-bit no-missing-code performance, ±0.0015% integral nonlinearity, a true differential analog input, an input buffer that isolates the modulator from high-impedance sources, and a low-pass digital filter with programmable output update rates. The SPI/QSPI/MICROWIRE/DSP-compatible three-wire serial interface simplifies connection to microcontrollers and DSPs. The combination of programmable gain and differential input makes the part well suited to direct connection to bridge sensors, RTDs, and thermocouples. Typical applications include portable industrial weigh scales, strain-gauge and pressure transducers, temperature measurement with thermocouples or RTDs, smart battery chargers, and 4-20 mA loop-powered industrial instruments. The wide dynamic range provided by the gain stage allows the device to resolve sub-millivolt transducer outputs directly without an external instrumentation amplifier. When designing with the AD7715ARU-5REEL, place the recommended 0.1 uF decoupling capacitor close to the AVDD pin and follow the datasheet's input-conditioning guidelines to avoid gain and offset error. The device performs on-chip self-calibration and system calibration to remove zero-scale and full-scale errors, which should be invoked after power-up for best DC accuracy. The -5 supply variant must be powered from 5 V; use the AD7715-3 variant for 3 V systems. This page synthesizes live distributor pricing, drop-in same-package alternatives, and engineering-grade design notes compiled from the Analog Devices AD7715 datasheet and XAIPART cross-reference data - content not consolidated in any single source.

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AD7716-DF - 22-Bit 4-Ch Data Acquisition ADC | Analog Devices
AD7716-DF

AD7716-DF - 22-Bit 4-Ch Data Acquisition ADC | Analog Devices

The Analog Devices AD7716-DF is a 4-channel 22-bit sigma-delta analog-to-digital converter (ADC) designed as a complete signal-processing block for high-precision data acquisition systems, housed in a 28-pin SOIC surface-mount package. It processes four channels simultaneously with bandwidths up to 584 Hz, delivering 22-bit resolution and a usable dynamic range of 111 dB at 36.5 Hz input bandwidth, decreasing to 99 dB at the maximum 584 Hz bandwidth. An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Sigma-delta ADCs use oversampling and noise shaping to achieve very high resolution (16-24 bits) at low sample rates, making them ideal for precision DC and low-frequency measurements. They sit within the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. The AD7716 specifically targets wide dynamic-range, low-frequency signals such as ECG, EEG, chemical, and biological process measurements where noise rejection and resolution matter more than speed. Key features of the AD7716-DF include on-chip digital filtering, four differential analog input channels, a serial interface for microcontroller connection, and LC2MOS process technology for low power consumption. The integrated digital filter provides first-order sinc filtering with user-programmable output update rates, while the analog front end handles differential inputs with high common-mode rejection. Internal calibration registers support both self-calibration and system calibration to correct offset and gain errors. The AD7716 uses a charge-balancing sigma-delta modulator followed by a digital decimation filter. The modulator samples the input at a high oversampling ratio, pushing quantization noise out of the baseband; the digital filter then low-pass filters and decimates the bitstream to produce the 22-bit output word. This architecture yields excellent linearity and inherent monotonicity without the need for laser trimming, while the LC2MOS process keeps active current low for portable and battery-powered instruments. Typical applications include medical instrumentation (ECG, EEG, patient monitors), industrial process controls (load cells, strain gauges, pressure transducers), scientific and laboratory instruments (chromatography, pH meters), and portable battery-powered data loggers. The wide dynamic range and four-channel integration reduce external component count and board space versus discrete ADC + op-amp solutions. When designing with the AD7716-DF, ensure the analog supply is well-decoupled and that the reference voltage source is low-noise and stable, since reference noise directly limits achievable resolution. The serial interface timing must obey the datasheet's setup-and-hold margins; for best noise rejection, enable the on-chip digital filter and select the lowest output update rate that still meets the application's bandwidth requirement. This page synthesizes distributor pricing, verified drop-in alternatives drawn from cross-reference databases, and practical design notes that complement the manufacturer datasheet.

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AD7719BR-REEL - 16/24-Bit Dual Sigma-Delta ADC AFE | Analog Devices
AD7719BR-REEL

AD7719BR-REEL - 16/24-Bit Dual Sigma-Delta ADC AFE | Analog Devices

The Analog Devices AD7719BR-REEL is a complete low-frequency analog front-end integrating two independent high-resolution Sigma-Delta analog-to-digital converters (one 24-bit main channel, one 16-bit auxiliary channel) with switchable matched excitation current sources, low-side power switches, a digital I/O port and an on-chip temperature sensor, packaged in a 28-pin SOIC (300 mil body, 0.295" / 7.50 mm width). It is factory-calibrated so no field calibration is required, accepts fully differential, unipolar or bipolar input ranges from ±REFIN1/128 up to ±REFIN1 through the programmable gain front end, and outputs settle in a single conversion cycle in single-conversion mode. The serial interface is SPI/QSPI/MICROWIRE/DSP-compatible, supporting simultaneous sampling and conversion of two signal sources with separate reference inputs per channel and simultaneous 50 Hz and 60 Hz mains rejection at a 20 Hz update rate. A Sigma-Delta ADC (also written as Sigma-Delta or SD ADC) is a class of oversampling noise-shaping converter that uses high clock rates and digital filtering to achieve very high effective resolution in low-bandwidth measurement applications such as strain gauges, RTDs, thermocouples and industrial process signals. Within the broader signal-chain taxonomy, the AD7719 sits at the analog front-end (AFE) layer above the raw ADC cell: it bundles gain, excitation, reference input, switching and serialization so that a microcontroller or DSP can read a digitized, calibrated, temperature-compensated signal directly from the bridge. Key features include 2 independent ADCs (24-bit main + 16-bit auxiliary), factory calibration, programmable-gain front end (gains of 1, 2, 4, 8, 16, 32, 64, 128), 20 mA matched excitation current sources with ISOURCE Select switching, on-chip temperature sensor, simultaneous 50 Hz / 60 Hz rejection, and a 28-pin SOIC footprint that drops into the same SOIC-28 socket as the AD7708, AD7714 and AD7799 family devices. The AD7719BR-REEL is supplied on a 13" tape-and-reel (TR) format suitable for high-volume SMT assembly. Architecturally, the main 24-bit channel uses a switched-capacitor Sigma-Delta modulator followed by a digital sinc filter; gain and offset coefficients are stored on-chip after factory trim. Two separate REFIN pins allow ratiometric bridges on the 24-bit channel and a separate reference on the 16-bit channel without interaction. Low-side power switches on the excitation pair simplify 4-wire sensor switching without external MOSFETs. Typical input ranges are ±20 mV to ±2.56 V at the 24-bit channel and 0 to VREF at the 16-bit channel. Typical applications include weigh scales, pressure transmitters, RTD / thermocouple temperature measurement, portable instrumentation and 4-20 mA smart transmitters where the auxiliary 16-bit ADC reads the loop current or supply voltage while the main 24-bit ADC digitizes the bridge output. Designers choose it for its low channel cost (one IC replaces analog signal chain plus two ADCs plus a current source IC) and its factory calibration. When designing with the AD7719, always provide 0.1 uF + 10 uF decoupling on AVDD/DVDD, route REFIN1 and REFIN2 as Kelvin connections to the bridge / reference, and respect the maximum AVDD-DVDD supply sequencing constraint. The digital I/O port can be configured as inputs, outputs or interrupts; programming uses the SPI-compatible serial interface with the MODE pin selecting the active register map. This page synthesizes distributor pricing, drop-in 28-SOIC alternatives and practical layout notes not collected in the manufacturer datasheet, providing an AFE-specific decision framework for sensor-front-end designers.

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AD7719BR-REEL7 - 24-Bit Dual Sigma-Delta ADC AFE | Analog Devices
AD7719BR-REEL7

AD7719BR-REEL7 - 24-Bit Dual Sigma-Delta ADC AFE | Analog Devices

The Analog Devices AD7719BR-REEL7 is a complete low-voltage, low-power analog front-end (AFE) for low-frequency measurement applications, integrating dual high-resolution Sigma-Delta (Σ-Δ) analog-to-digital converters in a 28-pin SOIC (0.295" width, 7.50mm) package supplied on a 7-inch tape and reel. The device contains a 24-bit main ADC with programmable gain amplifier (PGA) and a 16/24-bit auxiliary ADC, three or six input channels, switchable matched excitation current sources, low-side power switches, a digital I/O port, and an on-chip temperature sensor. A Σ-Δ (Sigma-Delta) analog-to-digital converter is a type of ADC that uses oversampling and noise shaping to achieve very high resolution at low bandwidths, making it ideal for precision DC and low-frequency signal acquisition. Within the broader signal-chain taxonomy, Sigma-Delta ADCs sit at the top of the resolution hierarchy among integrated ADC architectures, alongside successive-approximation (SAR) ADCs and pipeline ADCs; the AD7719 belongs to the precision-converter family within Analog Devices' data-converter portfolio. Key specifications from the manufacturer datasheet include 16/24-bit resolution on the dual Σ-Δ channels, an input range from REFIN1/128 to REFIN1 (fully differential, unipolar and bipolar), single 3 V and 5 V supply operation, 1.5 mA typical normal-mode quiescent current at 3 V, and 10 µA power-down current (32 kHz crystal running). The main channel accepts fully differential, unipolar, and bipolar input ranges via the on-chip PGA, and signals can be routed from either channel to calibration registers for background gain and offset correction. Architecturally, the AD7719 uses Analog Devices' proven Σ-Δ modulation core with a digital filter that delivers effective resolution at update rates suited for industrial sensors. The part communicates through an SPI-, QSPI-, MICROWIRE-, or DSP-compatible serial interface and is factory-trimmed to minimize external components. Typical applications include weigh scales, pressure and temperature sensor measurement, portable instrumentation, factory process control, and 4-20 mA loop transmitters. The integrated current sources and low-side switches simplify bridge-sensor excitation, while the auxiliary ADC can monitor supply voltage or temperature simultaneously with the main measurement. When designing with this AFE, place decoupling capacitors as close as possible to the analog and digital supply pins and isolate the analog and digital grounds at a single point. The digital filter settling time must be allowed between conversions to ensure specified noise performance. This page combines distributor pricing as of 2026-10-12, drop-in alternative cross-references, and PCB-level design notes that go beyond the manufacturer datasheet to accelerate component selection.

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AD7719BRUZ-REEL - 24-Bit Dual Sigma-Delta ADC | Analog Devices
AD7719BRUZ-REEL

AD7719BRUZ-REEL - 24-Bit Dual Sigma-Delta ADC | Analog Devices

The Analog Devices AD7719BRUZ-REEL is a complete low-frequency analog front-end integrating two high-resolution sigma-delta analog-to-digital converters, switchable matched excitation current sources, low-side power switches, a digital I/O port, and an on-chip temperature sensor, housed in a 28-pin TSSOP package. The main 24-bit channel features a programmable gain amplifier (PGA) that accepts fully differential, unipolar, and bipolar input signal swings of 0 mV to ±2.56 V, while a secondary 16-bit channel handles up to 0 V to VREF input. A sigma-delta ADC is a noise-shaping converter that trades speed for very high resolution by oversampling the input and pushing quantization noise out of the baseband; the AD7719's chopping scheme repeatedly reverses the entire signal chain to cancel dc offset and offset drift, which is essential in low-frequency precision measurement applications such as weigh scales, RTD/thermocouple temperature acquisition, and strain-gauge pressure transducers. This dual-channel, dual-resolution architecture places the AD7719 in the broader category of precision data acquisition ICs, between simple SAR ADCs and high-speed pipeline converters. Key features include 24-bit main-channel resolution with 0.0015% integral nonlinearity, a PGA gain range of 1 to 128, on-chip digital filtering, and a low quiescent current of typically 2 mA from a single 3 V or 5 V analog supply. The 28-TSSOP package exposes all digital I/O, SPI/QSPI/MICROWIRE-compatible serial interface, and dual excitation current sources for RTD bridges, while a chop-stabilized architecture provides excellent EMI rejection and DC drift performance. The AD7719BRUZ-REEL uses Analog Devices' patented chopping technique in which the analog input is alternately inverted and re-converted, then digitally de-chopped, removing first-order offset and 1/f noise; this delivers an effective offset drift of a few nV/°C and makes the part well suited to industrial environments with thermal cycling. The device supports both 3 V and 5 V operation with a digital interface that is directly compatible with microcontrollers and DSPs. Typical applications include weigh scales, RTD and thermocouple temperature measurement, pressure and strain-gauge transducer front-ends, 4-20 mA loop-powered transmitters, and portable industrial instrumentation. Its integrated excitation sources and low-side switches eliminate the need for external signal conditioning on many bridges. When designing, ensure adequate input common-mode bypassing and observe the maximum analog input range of ±2.56 V at the lowest PGA gain to avoid saturation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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AD7730BRUZ - 24-Bit Sigma-Delta Bridge Transducer ADC | Analog Devices
AD7730BRUZ

AD7730BRUZ - 24-Bit Sigma-Delta Bridge Transducer ADC | Analog Devices

The Analog Devices AD7730BRUZ is a complete analog front end (AFE) for weigh-scale and pressure measurement applications, integrating a 24-bit sigma-delta ADC with a programmable gain front end. It delivers up to 230,000 counts peak-to-peak resolution, accepts differential low-level signals directly from a bridge transducer, and outputs a serial digital word from a single +5 V supply in a 24-pin TSSOP package. The part is specified for -40 C to +85 C industrial operation and dissipates a typical 125 mW. An analog front end (AFE) is the signal-conditioning stage that sits between a sensor and a digital processor. In bridge-sensor applications the AFE must amplify microvolt-level signals, reject 50 Hz/60 Hz line noise, and present a clean digital word to the MCU or DSP. The AD7730 combines a precision programmable-gain instrumentation front end, a 24-bit sigma-delta modulator, and a digital low-pass filter on a single die, eliminating the external IA and ADC pair that older weigh-scale designs required. Architecturally it belongs to the wider ADC family -> sigma-delta ADC -> 24-bit ADC -> precision data acquisition IC -> signal chain. Key features include 5 nV/C offset drift, 2 ppm/C gain drift, greater than 150 dB line-frequency rejection, and four unipolar input ranges (0 to +/-10 mV, +20 mV, +40 mV, +80 mV) plus four bipolar ranges (+/-10 mV, +/-20 mV, +/-40 mV, +/-80 mV). Two buffered differential inputs and a differential reference input allow direct connection to a four-wire bridge. On-chip self-calibration and system-calibration routines remove offset and gain error after PCB assembly. Typical applications include electronic weigh scales, load-cell transmitters, pressure transducers, and industrial process-control front ends. The TSSOP-24 footprint also makes it a fit for medical infusion pumps and force-measurement instrumentation where board area is constrained and a true 24-bit noise-free conversion is required. When designing with the AD7730BRUZ, separate the analog AVDD and digital DVDD supplies and decouple each pin with 100 nF ceramic plus a 10 uF bulk capacitor. Use a low-noise reference such as the ADR03 / ADR420 and keep the bridge excitation current return path close to the analog ground plane. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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AD7730BRUZ-REEL7 - 24-Bit Bridge Transducer AFE, 1.2kSPS | ADI
AD7730BRUZ-REEL7

AD7730BRUZ-REEL7 - 24-Bit Bridge Transducer AFE, 1.2kSPS | ADI

The Analog Devices AD7730BRUZ-REEL7 is a complete analog front end (AFE) for weigh-scale and pressure-measurement systems, integrating a 24-bit sigma-delta ADC with a programmable gain front end that accepts low-level signals directly from a bridge transducer and outputs a serial digital word. The device operates from a single +5 V supply, features two buffered differential programmable-gain analog inputs plus a differential reference input, and supports four unipolar input ranges (0 to +10 mV, +20 mV, +40 mV, +80 mV) and four bipolar ranges (±10 mV, ±20 mV, ±40 mV, ±80 mV), packaged in a 24-lead TSSOP and shipped on 7-inch tape and reel. An analog front end (AFE) is a signal-conditioning circuit that sits between a sensor and a digital signal processor, converting analog signals into digital data. In the data-converter domain, an AFE typically combines amplification, filtering, and analog-to-digital conversion in one block. The AD7730 is a specialized AFE for bridge transducers such as load cells and pressure sensors, where it provides high-resolution conversion of small differential signals. It belongs to the sigma-delta ADC family, which uses oversampling and noise shaping to achieve high effective resolution. The AD7730's architecture includes a programmable gain amplifier (PGA) that allows direct connection to low-level transducer outputs, eliminating external gain stages and reducing board complexity. Key features of the AD7730BRUZ-REEL7 include 24-bit resolution, a maximum output data rate of 1.2 kSPS, and a power dissipation of 125 mW. The programmable gain front end provides gains up to 128, allowing it to handle input signals as low as ±10 mV full-scale. Additional features include a differential reference input, an on-chip digital low-pass filter, a serial interface compatible with microcontrollers and DSPs, and self-calibration plus system-calibration modes. The device is specified over the industrial temperature range of -40 °C to +85 °C, and features an offset drift below 5 nV/°C and a gain drift below 2 ppm/°C. Technically, the AD7730 uses a sigma-delta modulator followed by a digital low-pass filter. The modulator oversamples the input at a high rate and produces a bitstream that is then filtered and decimated to deliver the final 24-bit output word. The programmable gain front end is based on an analog modulator with proprietary architecture that provides high linearity and low noise. The on-chip self-calibration feature automatically corrects offset and gain errors, ensuring accurate measurements over time and temperature; offset drift is specified at less than 5 nV/°C and gain drift at less than 2 ppm/°C. Typical applications for the AD7730BRUZ-REEL7 include weigh scales, pressure transmitters, and other industrial measurement systems. Its high resolution and low noise make it ideal for precision measurement of small signals from bridge sensors, and the device is also suitable for portable instrumentation where low power consumption matters. When designing with the AD7730, provide a clean, low-noise +5 V supply and use proper PCB layout techniques to minimize noise pickup. Drive the reference input with a low-impedance source and filter the analog inputs to remove high-frequency noise. The serial interface allows easy connection to microcontrollers, and the device can be configured for various output data rates and filter settings. This page synthesizes distributor pricing, drop-in alternatives sourced from Analog Devices' pin-compatible AD7730 family, and practical design notes not found in the manufacturer datasheet.

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