ADC/DAC
Products (2398)
AD5933YRSZ - 1MSPS 12-bit Impedance Converter, 16-SSOP
The Analog Devices AD5933YRSZ is a high-precision 1 MSPS, 12-bit impedance converter and network analyzer housed in a 16-pin SSOP (RS) package, combining an on-board programmable frequency generator, a 12-bit analog-to-digital converter (ADC), and a discrete Fourier transform (DFT) engine on a single chip. The excitation frequency can be set up to 16.776 MHz, allowing an external complex impedance to be stimulated with a known sine wave; the response is sampled and processed by an on-chip DFT to extract real and imaginary impedance components. Key headline parameters are: 1 MSPS ADC, 12-bit resolution, and a 16.776 MHz maximum MCLK. The device operates from 2.7 V to 5.5 V supply and supports I2C and SPI serial interfaces for register configuration. An impedance converter network analyzer is a mixed-signal subsystem that synthesizes a sine stimulus, applies it to an external unknown impedance (typically via a precision front-end op-amp and transimpedance gain resistor), and uses an ADC plus on-chip DFT to extract the impedance's real and imaginary components at each frequency. This category sits inside the larger family of data acquisition ICs (ADC/DAC) and ultimately under the semiconductor hierarchy of mixed-signal converters. Compared to discrete lock-in amplifier or LCR-meter solutions, an integrated impedance converter dramatically reduces PCB area, firmware complexity, and BOM cost for embedded bio-impedance, chemical-sensor, and material-analysis instruments. The AD5933 is the industry-standard example of this category. Key features include programmable frequency sweep with start, delta, and number-of-increments registers that automate multi-point frequency response capture, selectable PGA gain of ×1 or ×5 to accommodate a wide impedance range, and configurable clock sources (internal oscillator, external clock, or external crystal). Output excitation voltage is selectable between 2 V p-p and 1 V p-p (with offset option), and the on-chip temperature sensor enables system-level compensation. The integrated DFT returns magnitude and phase registers that can be linearly extrapolated to estimate impedance magnitude and phase via the gain factor formula. Architecturally, the AD5933 combines a 27-bit direct digital synthesizer (DDS) for frequency generation, a 12-bit SAR ADC clocked at up to 1 MSPS, and an embedded DSP that performs a 1024-point DFT on the ADC output. The wide excitation range (1 kHz to 500 kHz typical) covers most bio-impedance and electrochemical applications. The device is specified from -40 °C to +125 °C with 16-SSOP packaging offering moderate thermal resistance. Calibration using a known reference impedance (typically 200 kΩ or 100 kΩ) is required to compute the gain factor and achieve < ±2 percent impedance error. Typical applications include portable bio-impedance body-fat analyzers, electrochemical gas and glucose sensors, fuel-cell and battery impedance spectroscopy, material characterization for coatings, in-situ corrosion monitoring, and low-frequency LCR-meter front-ends. In each case, the AD5933's integrated DFT eliminates the need for a separate DSP/MCU to run spectral analysis. Industrial 4 mA and 24 V rail systems benefit from the 5 V tolerant digital interface. To design correctly, system engineers must reserve 4 GPIO for I2C or SPI, decouple AVDD with a 1 µF and 100 nF pair, and follow the calibration routine using a precision reference resistor within the target impedance range.
AD5934YRSZ - 250 kSPS 12-Bit Impedance Converter | Analog Devices
The Analog Devices AD5934YRSZ is a 250 kSPS, 12-bit impedance converter and network analyzer that combines an on-board frequency generator with a 12-bit, 250 kSPS analog-to-digital converter (ADC). Housed in a 16-pin SSOP package (YRS suffix), the device is specified for operation from a 3.3 V supply with an external MCLK up to 16.776 MHz, and it produces an excitation output up to 50 kHz for sweeping an unknown complex impedance. The integrated discrete Fourier transform (DFT) engine returns calibrated real and imaginary 16-bit words per frequency point, allowing a host microcontroller to compute magnitude and phase. An impedance analyzer is an instrument class that measures the complex impedance (resistance plus reactance) of a component, sensor, or biological sample across a range of AC frequencies. Within the broader instrumentation hierarchy, the AD5934 sits between a discrete lock-in amplifier and a full benchtop LCR meter: it removes the need for a separate function generator, digitizer, and FFT processor while still delivering calibrated magnitude/phase data over a user-selected frequency sweep. This integration is what makes it attractive for embedded electrochemical, bioimpedance, and material-sensing products. Key specifications include 12-bit ADC resolution at 250 kSPS, an excitation amplitude programmable in four steps from 0.2 V p-p to 2.0 V p-p, a programmable gain amplifier (PGA) with x1 or x5 settings, an I2C-compatible serial interface, and an operating temperature range of -40C to +125C. The on-chip temperature sensor (TA pin) and dedicated system clock input allow designers to add temperature compensation and reject mains-related clock jitter in the same BOM. Architecturally, the AD5934 separates the excitation DAC, the transimpedance front end (with external RFB), the sampling ADC, and the DSP DFT block, all clocked from a single MCLK reference. The result is a system whose accuracy is determined by the external calibration resistor (typically 200 kohm between RFB and VIN), the stability of the MCLK source, and the impedance range selected via the gain resistor - not by any factory trim step, which simplifies board bring-up. Typical applications include bioimpedance and skin-conductance analysis, electrochemical sensor interfaces, in-line material moisture meters, portable LCR-style probes, and multi-frequency material identification. Engineers choose the AD5934 when they need calibrated magnitude/phase data without the cost, size, or power budget of a bench instrument. When designing with the part, place the calibration resistor close to the RFB and VIN traces and drive MCLK from a low-jitter source; this is the single biggest determinant of sweep-to-sweep repeatability. This page synthesizes distributor pricing, qualified drop-in alternatives, and practical layout notes not collected in the standalone datasheet PDF.
AD5934YRSZ-REEL7 - 250kSPS 12-Bit Impedance Converter | ADI
The Analog Devices AD5934YRSZ-REEL7 is a high-precision 12-bit, 250 kSPS impedance converter and network analyzer system-on-chip that combines an on-board programmable frequency generator with a 12-bit analog-to-digital converter (ADC) and an on-chip DSP engine for discrete Fourier transform (DFT) processing, all integrated into a 16-pin SSOP package. The device excites an external complex impedance with a known frequency up to 50 kHz, samples the response signal, and returns calibrated real and imaginary impedance words via I²C/SPI serial interface, eliminating the need for external signal conditioning and reducing the BOM for portable bio-impedance and material analysis designs. An impedance converter network analyzer is a specialized data acquisition system that performs synchronous sine excitation, current-to-voltage conversion, and discrete Fourier transform (DFT) processing to extract magnitude and phase information from a connected unknown impedance. As a member of the impedance analyzer / LCR meter IC family, it sits at the intersection of the broader categories of direct digital synthesis (DDS), signal chain analog-to-digital converter (ADC), and embedded DSP, which together form a complete vector impedance measurement sub-system. The AD5934 in particular integrates DDS, transimpedance amplifier, ADC, and DFT engine into one IC. Key specifications include 12-bit ADC resolution, 250 kSPS sampling rate, programmable excitation output frequency up to 50 kHz, 16.776 MHz internal clock or external MCLK input, on-chip temperature sensor with ±2 °C precision, and serial interface compatibility with I²C or SPI protocols. The device supports a system clock from 0.1 MHz to 16.776 MHz and is supplied from a single 2.7 V to 5.5 V rail, equivalent to most 3 V or 5 V logic rails. The internal DDS allows 0.1 Hz frequency resolution when clocked from the on-chip oscillator. The excitation amplitude is programmable in four discrete steps between 0.2 Vpp and 1.98 Vpp to accommodate different impedance ranges. The AD5934 architecture combines a 28-bit direct digital synthesizer (DDS) core, a low-noise transimpedance front-end, a 12-bit successive-approximation ADC, and an embedded DFT processor that returns calibrated real (R) and imaginary (I) 16-bit words per frequency point. Gain factor calibration using a reference impedance removes system gain error across the 100 Ω to 10 MΩ measurement range, equivalent to a four-decade dynamic span, while the embedded temperature sensor compensates for system drift across the -40 °C to +125 °C automotive-grade operating range. The serial interface supports both standard I²C (100 kHz) and SPI (up to 5 MHz) for flexible host connectivity. Typical applications include portable bio-electrical impedance analysis (BIA) for body composition scales and fitness monitors, in-vitro electrochemical biosensors for glucose and pathogen detection, industrial material moisture and soil moisture analysis, fuel cell and battery impedance spectroscopy for state-of-charge estimation, and on-board diagnostic (OBD) systems for automotive sensor health monitoring. Compared to discrete lock-in amplifier solutions, the AD5934 reduces board area, BOM count, and firmware complexity by integrating the entire excitation-acquisition-DFT pipeline into one SSOP-16 package, while preserving calibration-grade accuracy through its gain factor compensation routine. When designing with the AD5934, place a precision 200 Ω or 100 kΩ reference resistor between the excitation output (IOUT) and the ADC input (VIN) for system calibration, and use the temperature sensor reading to correct for thermal drift of the reference resistor. The RFB pin selects the transimpedance gain; pair it with a low-temperature-coefficient external feedback resistor to extend the impedance measurement range beyond 1 MΩ. This page synthesizes distributor pricing, drop-in alternatives, application notes, and design tips that complement the manufacturer datasheet with practical engineering guidance for impedance measurement system development.
AD637JRZ - 0.25% RMS-to-DC Converter, 200kHz | Analog Devices
The Analog Devices AD637JRZ is a high-accuracy, wideband true RMS-to-DC converter that computes the true root mean square value of any complex waveform, delivering 0.25% conversion accuracy with a 200 kHz measurement bandwidth in a 16-lead SOIC package. An RMS-to-DC converter is a specialized analog computing IC that produces a DC output proportional to the root-mean-square (RMS) value of its input signal, regardless of waveform shape. Within the signal chain hierarchy, it sits between the analog front end and the ADC or metering stage, enabling true-RMS measurement of AC signals where simple average-responding circuits fail, such as for noise, distorted, or pulsed waveforms. Key features of the AD637JRZ include true RMS, mean-square, and absolute-value computation modes, a wide supply range of plus/minus 3V to plus/minus 18V, and a supply current of only 2.2 mA with power dissipation of approximately 108 mW. The device offers accuracy comparable to discrete and modular techniques, which historically cost far more and occupied more board area. Technically, the AD637 uses an implicit analog computation architecture based on a translinear multiplier-divider cell and an active low-pass filter/averaging stage. The J-grade device specified here guarantees 0.25% of reading accuracy, while the same die family is offered in A, B, and K grades with tighter error limits. The wide 200 kHz bandwidth supports measurement of audio, mains-harmonic, and medium-frequency signals. Typical applications include true-RMS panel meters and DMM front ends, RF and audio power measurement, industrial process monitoring of distorted waveforms from variable-frequency drives, and noise measurement instrumentation. Its low supply current also suits portable test equipment. Design consideration: the averaging capacitor on the external filter pin sets ripple and settling trade-offs; larger capacitance reduces output ripple but extends settling time, so choose it based on the lowest measurement frequency. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
AD650SD/883B - V/F & F/V Converter 1MHz | Analog Devices
The AD650SD/883B is a monolithic voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter from Analog Devices, designed for high-accuracy analog-to-digital conversion and precision frequency measurement. It operates at a maximum frequency of 1 MHz with a nonlinearity of ±0.1% (typical), making it suitable for demanding industrial and aerospace applications. The device is housed in a 14-pin ceramic dual-in-line package (CDIP) and is specified for the full military temperature range of -55°C to +125°C, ensuring reliable operation in extreme environments. A voltage-to-frequency converter (VFC) is an electronic circuit that converts an analog input voltage into a proportional output frequency. This type of converter is widely used in analog-to-digital conversion, where the frequency output can be easily counted by digital logic, providing high resolution and noise immunity. The AD650SD/883B also operates in the reverse mode as a frequency-to-voltage converter, enabling closed-loop control and frequency measurement applications. As a member of the voltage-to-frequency converter family, it bridges the analog and digital domains, offering a simple and robust interface for data acquisition systems. Key features of the AD650SD/883B include a 1 MHz full-scale frequency, ±0.1% typical nonlinearity, and a wide supply voltage range of ±9V to ±18V. The device offers both single-ended and differential input configurations, and its output is a square wave that can drive TTL or CMOS logic directly. The ceramic package provides excellent thermal stability and hermetic sealing, making it ideal for military and aerospace applications where reliability is critical. Technically, the AD650SD/883B uses a charge-balancing architecture that ensures high linearity and temperature stability. The input current is integrated over a fixed time period, and the output frequency is proportional to the input voltage. This design minimizes drift and provides excellent long-term stability. The device also includes an internal reference and a precision comparator, reducing the need for external components. Typical applications include precision analog-to-digital conversion, frequency-to-voltage conversion for tachometers and flow meters, and isolated signal transmission in industrial control systems. The AD650SD/883B is also used in aerospace telemetry and test instrumentation where high accuracy and wide temperature range are required. When designing with the AD650SD/883B, ensure proper decoupling of the power supply pins with 0.1µF ceramic capacitors placed close to the device. The input signal should be filtered to remove high-frequency noise, and the output frequency should be buffered if driving long cables. The device's power dissipation is moderate, but thermal management is recommended for high-temperature environments.
AD6644 - 14-Bit 65 MSPS ADC | Analog Devices | Wideband
The AD6644 is a high speed, high performance, monolithic 14-bit analog-to-digital converter (ADC) from Analog Devices. It is designed for wideband, multichannel, multimode receivers and is part of the SoftCell transceiver chipset. The device operates at guaranteed sample rates of 65 MSPS (with a 40 MSPS version available) and provides CMOS-compatible digital outputs in twos complement format. It is packaged in a 52-lead Plastic Low Profile Quad Flat Pack (LQFP) and is specified for operation from -25°C to +85°C. An analog-to-digital converter (ADC) is a critical component in signal processing chains that converts continuous analog signals into discrete digital values for processing by digital systems. The AD6644 is a high-speed, high-resolution ADC, positioned in the hierarchy of data converters: ADC -> high-speed ADC -> wideband ADC -> IF-sampling ADC. It integrates a track-and-hold (T/H) circuit and reference, providing a complete conversion solution on-chip, which simplifies system design and reduces external component count. Key features of the AD6644 include a 65 MSPS guaranteed sample rate, 100 dB multitone SFDR, and low power dissipation of 1.3 W. It features differential analog inputs, which improve common-mode noise rejection, and digital outputs that are 3.3 V CMOS-compatible, ensuring easy interfacing with modern digital logic. The device uses a three-stage subrange architecture, achieving high accuracy and speed while maintaining low power and small die size. The AD6644 is built on Analog Devices' high speed complementary bipolar process (XFCB) and uses an innovative multipass circuit architecture. This design enables high dynamic performance, making it suitable for demanding applications such as digital receivers, cellular base stations, and test equipment. The device's wideband capability allows direct IF sampling, reducing the need for multiple downconversion stages. Typical applications include multichannel, multimode receivers, software-defined radios, cellular infrastructure, and radar systems. The AD6644's high SFDR and low noise make it ideal for these applications where signal fidelity is critical. Its differential inputs and CMOS outputs simplify integration with FPGAs and DSPs. When designing with the AD6644, careful attention to decoupling and grounding is essential to achieve optimal performance. The datasheet provides detailed recommendations for power supply decoupling and PCB layout to minimize noise and ensure accurate conversion.
AD664TD-UNI/883B - 12-Bit Quad DAC, Military | Analog Devices
The AD664TD-UNI/883B is a monolithic 12-bit quad digital-to-analog converter (DAC) from Analog Devices, designed for precision multi-channel voltage-output applications. It integrates four complete 12-bit DACs on a single chip, each with a double-buffered input latch structure and data readback function. The device operates from a single external reference and is available in a 28-pin side-brazed ceramic DIP (CDIP) package, screened to military standards (MIL-STD-883). It supports unipolar (UNI) output range with a gain of one or two times the reference voltage, and features a microprocessor-compatible parallel interface for all read and write operations. A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. The AD664 is a quad DAC, meaning it contains four independent DAC channels on one chip, enabling simultaneous multi-channel analog output from a single digital interface. This device belongs to the family of data converters, which are essential in mixed-signal systems where digital processing meets the analog world. The AD664's architecture uses the BiMOS II process, combining bipolar and CMOS transistors, along with laser-trimmed thin-film resistors and double-level metal interconnects to achieve high accuracy and stability. Key features of the AD664TD-UNI/883B include four complete voltage-output DACs, data register readback, reset-to-zero override, multiplying operation, and double-buffered latches. The device offers a settling time of 10 microseconds (as per Xecor comparison data) and operates over the full military temperature range of -55°C to +125°C. The package is a 28-pin side-brazed ceramic DIP, which is suitable for high-reliability applications. The device is RoHS non-compliant, reflecting its military-grade heritage. The AD664 uses a double-buffered input latch structure, allowing all four DACs to be updated simultaneously, which is critical for applications requiring synchronized analog outputs. The data readback function enables verification of written data, enhancing system diagnostics. The reset-to-zero override forces all outputs to zero, useful for system initialization. The multiplying operation allows the reference voltage to be varied, enabling programmable gain or attenuation. Typical applications include military avionics, industrial process control, automatic test equipment (ATE), and precision instrumentation where multiple analog outputs are needed. The military screening ensures reliability in harsh environments. The parallel interface simplifies connection to microprocessors and DSPs. When designing with this device, ensure adequate decoupling on the power supply and reference pins, and consider the settling time when updating multiple channels. The device is obsolete, so verify availability and consider alternatives for new designs.
AD667SD/883B - 12-Bit DAC, 28-CDIP | Analog Devices
The AD667SD/883B is a complete voltage output 12-bit digital-to-analog converter (DAC) from Analog Devices, featuring a high stability buried Zener voltage reference and a double-buffered input latch on a single chip. It is packaged in a 28-pin ceramic DIP (CDIP) and is designed for precision industrial and military applications. The device uses 12 precision high-speed bipolar current steering switches to achieve a settling time of 3 microseconds, ensuring fast and accurate analog output. A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. The AD667SD/883B is a voltage-output DAC, meaning it directly provides a voltage proportional to the digital input. It belongs to the family of data conversion ICs, which are essential in systems that interface digital processing with the analog world, such as microcontrollers, DSPs, and industrial control systems. The AD667 series is known for its high precision and stability, making it suitable for applications requiring accurate analog signals. Key features of the AD667SD/883B include 12-bit resolution, a single channel, and a settling time of 3 microseconds. The device operates from a +5V and -5V power supply, and it includes an internal buried Zener reference that provides excellent temperature stability. The double-buffered input latch allows for simultaneous updating of multiple DACs in a system, which is critical in multi-channel applications. The 28-pin CDIP package is hermetically sealed, offering enhanced reliability in harsh environments. Technically, the AD667SD/883B utilizes a current-steering architecture with a precision R-2R ladder network. The buried Zener reference ensures low noise and low drift over temperature, which is essential for high-accuracy applications. The device is designed to be microprocessor-compatible, with a parallel interface that can be easily connected to standard digital buses. The output voltage range is typically 0V to +10V or +/-5V, depending on the configuration, and it can drive loads up to 5mA. Typical applications include industrial process control, test and measurement equipment, and military/aerospace systems where high precision and reliability are paramount. The AD667SD/883B is also used in audio equipment for crystal-clear signal generation, as noted in comparison data. Its fast settling time and low glitch energy make it suitable for waveform generation and closed-loop control systems. When designing with the AD667SD/883B, it is important to provide adequate decoupling on the power supply pins and to ensure a clean analog ground plane. The reference output should be buffered if external loads are connected. Additionally, the digital inputs should be properly terminated to avoid noise-induced errors. The device is specified for operation over the full military temperature range of -55C to +125C, making it suitable for demanding environments.
AD6705 - 8-Bit Signal Conditioning ADC | Analog Devices
The AD6705 is an 8-bit, low-cost, signal conditioning analog-to-digital converter (ADC) from Analog Devices, designed for aerospace and industrial applications requiring precise analog-to-digital conversion with minimal external components. It integrates a complete signal conditioning front-end, including an instrumentation amplifier and a successive approximation register (SAR) ADC, enabling direct interface to sensors and transducers. The device operates from a single supply, simplifying power design and reducing system cost. An ADC (analog-to-digital converter) is a critical component in data acquisition systems that converts continuous analog signals into discrete digital values for processing by microcontrollers, DSPs, or FPGAs. The AD6705 belongs to the family of signal conditioning ADCs, which combine amplification, filtering, and conversion in a single package, reducing board space and improving noise immunity. This integration is essential in aerospace and industrial environments where signal integrity and reliability are paramount. Key features of the AD6705 include an 8-bit resolution, a single-supply operation, and a built-in signal conditioning front-end that accepts a wide range of input signals. The device offers a low-cost solution for applications that do not require high-resolution conversion but demand robustness and ease of use. Its aerospace-grade qualification ensures operation over extended temperature ranges and harsh conditions. Technically, the AD6705 employs a SAR architecture, which provides fast conversion times and low power consumption. The integrated instrumentation amplifier allows direct connection to bridge sensors, thermocouples, and other low-level signals, eliminating the need for external gain stages. The device also includes an internal reference, further reducing external component count. Typical applications include aerospace telemetry, industrial process control, and portable instrumentation. In aerospace, the AD6705 is used for monitoring pressure, temperature, and position sensors, where its reliability and signal conditioning capabilities are critical. In industrial settings, it interfaces with transducers in control loops, providing accurate digital data for process automation. When designing with the AD6705, ensure proper decoupling of the power supply and careful layout of the analog input traces to minimize noise. The device's single-supply operation simplifies power design, but attention to reference stability is necessary for accurate conversions.
AD674BTE/883B - 12-Bit SAR ADC, 28-CDIP | Analog Devices
The AD674BTE/883B is a complete 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, featuring an internal high-precision voltage reference and clock. It is packaged in a 28-pin ceramic dual-in-line package (CDIP) and is designed for direct interface to 8- and 16-bit microprocessor buses via three-state output buffers. The device operates from ±12V and +5V supplies and converts in a maximum of 15 microseconds, making it suitable for high-speed data acquisition systems. An analog-to-digital converter (ADC) is an electronic component that converts a continuous analog voltage into a discrete digital representation. The AD674BTE/883B is a successive approximation register (SAR) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed and moderate resolution, making them ideal for industrial control, instrumentation, and data acquisition. The AD674B family is pin-compatible with the industry-standard AD574A but offers faster conversion time and lower power consumption. Key features of the AD674BTE/883B include 12-bit resolution, a maximum conversion time of 15 µs, and an internal 10V reference. It accepts bipolar input ranges of ±5V and ±10V, as well as unipolar 0V to 10V and 0V to 20V, selectable via pin strapping. The device includes a three-state output buffer for direct bus interfacing and operates over the extended temperature range of -55°C to +125°C, meeting MIL-STD-883B standards. Technically, the AD674BTE/883B integrates a precision voltage reference, clock, and comparator on-chip, reducing external component count. The SAR architecture ensures monotonicity and no missing codes over the full temperature range. The device features a 12-bit parallel output with a status pin (STS) that indicates conversion completion, simplifying microprocessor handshaking. The 28-pin CDIP package provides excellent thermal and mechanical stability for harsh environments. Typical applications include military and aerospace data acquisition, industrial process control, medical instrumentation, and scientific analysis equipment. The device's wide operating temperature range and high reliability make it suitable for mission-critical systems where accuracy and durability are paramount. When designing with the AD674BTE/883B, ensure proper decoupling of the power supplies and a clean analog ground plane to minimize noise. The internal reference can be overridden by an external reference for improved accuracy, but the internal reference is sufficient for most applications. The conversion start (CE, CS, R/C) control pins allow flexible timing, and the STS pin can be used to trigger interrupts or polling routines.
AD676JN - 16-Bit 100kSPS Parallel SAR ADC | Analog Devices
The Analog Devices AD676JN is a 16-bit, 100 kSPS parallel-output successive-approximation (SAR) analog-to-digital converter housed in a 28-pin plastic DIP (PDIP-28) package. It combines a switched-capacitor/charge-redistribution core with on-chip autocalibration, delivering 10 microsecond total conversion time, ±1 LSB INL maximum (no missing codes), 97 dB THD, and 90 dB signal-to-noise ratio. The integrated sample-and-hold amplifier accepts full-scale unipolar or bipolar input ranges from the on-chip reference or an external reference source. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes at a defined sample rate. SAR (Successive Approximation Register) ADCs use a binary-search algorithm to converge on the input voltage in N clock cycles for an N-bit result, trading conversion speed for high resolution and low power. Within the broader hierarchy, SAR ADCs occupy the mid-speed, high-precision niche between flash converters (>100 MSPS, lower resolution) and sigma-delta ADCs (<1 MSPS, very high resolution). The AD676 sits in the precision industrial-instrumentation tier of this family. Key differentiating features include: (1) on-chip autocalibration that corrects internal linearity errors at power-up and on command, eliminating the need for external trim; (2) a true 16-bit parallel microprocessor interface that reads conversion data in one bus cycle, avoiding the timing overhead of serial ADCs; (3) a flexible analog input stage that accepts 0-10 V, 0-5 V, ±5 V, or ±10 V ranges via pin-strapping; and (4) industrial-grade 0 °C to +70 °C operating range suitable for test & measurement and process-control front ends. Architecturally, the AD676 uses a charge-redistribution DAC array combined with a high-speed comparator and SAR logic. The autocalibration routine measures each bit-weight error with the input disconnected and stores correction coefficients in on-chip RAM, which are then applied during normal conversion to achieve 16-bit linearity. This calibration approach trades initial power-up time for measurement accuracy without requiring precision external components. Typical applications include industrial process-control data acquisition boards, medical instrumentation front ends (patient monitors, blood analyzers), sonar and audio signal acquisition, vibration and seismic measurement, and precision weighing scales. The parallel output makes the AD676JN an ideal drop-in for legacy ISA-bus and parallel-microcontroller-based systems where 16-bit data must be latched every 10 microseconds. When designing with the AD676JN, pay attention to power-supply decoupling: place 10 microfarad tantalum and 0.1 microfarad ceramic capacitors within 5 mm of the +VCC and -VCC pins. The CAL pin initiates autocalibration; tying it to logic high after power-up guarantees a calibrated state before the first conversion. This page synthesizes verified distributor pricing, drop-in package alternatives, AEO-optimized FAQ entries, and practical design notes not found on a typical manufacturer product page.
AD676TD/883B - 16-Bit 100kSPS SAR ADC | Analog Devices
The AD676TD/883B is a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices, designed for high-precision data acquisition. It features a parallel interface and operates at a sampling rate of 100 kSPS, making it suitable for industrial and military applications. The device is packaged in a 28-pin ceramic dual in-line package (CDIP) and is qualified to MIL-STD-883B standards, ensuring reliability in harsh environments. An ADC is an electronic component that converts continuous analog signals into discrete digital values. The AD676TD/883B is a specific type of ADC known as a SAR ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are valued for their high resolution, low power consumption, and fast conversion times, making them ideal for applications such as data acquisition systems, industrial process control, and medical instrumentation. The AD676TD/883B is part of the broader category of data converters, which are essential in bridging the analog and digital domains in electronic systems. Key features of the AD676TD/883B include its 16-bit resolution, which provides 65,536 discrete levels, and its 100 kSPS sampling rate, enabling accurate capture of dynamic signals. The parallel output interface simplifies connection to microprocessors and DSPs. The device operates from a single +5V supply and includes an internal reference and sample-and-hold amplifier, reducing external component count. The MIL-STD-883B qualification ensures it meets stringent military specifications for temperature range, reliability, and quality. Technically, the AD676TD/883B uses a charge redistribution architecture with a precision comparator and a capacitive DAC. It provides an analog ground sense pin for accurate input grounding and separate analog and digital grounds to minimize noise coupling. The device offers a full-scale input range of ±5V and a signal-to-noise ratio (SNR) of typically 90 dB, ensuring high fidelity conversion. The conversion time is 10 µs, and the device features a busy output to indicate conversion completion. Typical applications include military avionics, industrial automation, and high-end test equipment. In avionics, the AD676TD/883B is used for flight control and navigation systems where precision and reliability are critical. In industrial settings, it is employed in process control loops and vibration analysis. The device's parallel interface and high resolution make it suitable for multi-channel data acquisition systems. When designing with the AD676TD/883B, ensure proper decoupling of the power supply and careful layout of the analog and digital grounds to maintain accuracy. The analog input should be driven by a low-impedance source to avoid sampling errors. The device is now obsolete, so designers should consider alternative parts for new designs.
AD7091R-2BRUZ - 12-Bit 1MSPS SAR ADC | Analog Devices
The AD7091R-2BRUZ from Analog Devices is a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) that operates from a single 2.7V to 5.25V power supply and achieves a sampling rate of 1 MSPS. It features two single-ended analog input channels, an on-chip 2.5V reference, and a high-speed serial interface (SPI). The device is housed in a 16-lead TSSOP package, making it suitable for space-constrained applications. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input into a digital output. It is known for its high speed, low power consumption, and ease of use, making it ideal for applications such as data acquisition, industrial control, and portable instrumentation. The AD7091R-2 is part of the AD7091R family, which includes 2-, 4-, and 8-channel versions, all sharing the same core architecture and performance characteristics. Key features of the AD7091R-2BRUZ include ultralow power consumption (typically 367 µA at 3V and 1 MSPS), a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1.5 MHz, and an on-chip conversion clock that simplifies system design. The device also includes a channel sequencer that allows preprogrammed selection of channels to be converted sequentially, enhancing flexibility in multi-channel applications. The AD7091R-2BRUZ uses a SAR architecture with an internal reference and a high-speed serial interface that supports data read after conversion, achieving a 1 MSPS throughput rate with a 50 MHz SCLK. The device is designed for low power and high accuracy, with a typical power dissipation of less than 2 mW at 3V, making it suitable for battery-powered and portable applications. Typical applications include battery monitoring, data acquisition systems, industrial process control, and portable instrumentation. The wide input bandwidth and low power consumption make it ideal for applications requiring high-speed, low-power analog-to-digital conversion. When designing with this device, ensure that the analog input voltage does not exceed the supply voltage and that adequate decoupling capacitors are placed near the power supply pins. The SPI interface should be configured for the correct clock polarity and phase to ensure reliable data transfer.
AD7091R-4BRUZ - 4-Ch 12-Bit 1MSPS SAR ADC | Analog Devices
The AD7091R-4BRUZ is a 4-channel, 12-bit, ultralow power, successive approximation (SAR) analog-to-digital converter (ADC) from Analog Devices. It operates from a single 2.7 V to 5.25 V power supply and achieves a sampling rate of 1 MSPS. The device features an on-chip 2.5 V reference, an on-chip conversion clock, and a high-speed SPI-compatible serial interface. It is available in a 20-lead TSSOP package, making it suitable for space-constrained applications. An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital numbers. The AD7091R-4BRUZ is a SAR ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed, low power, and ease of use, making them ideal for a wide range of applications. The AD7091R-4BRUZ is part of the AD7091R family, which includes 2-, 4-, and 8-channel versions, all sharing the same core architecture. Key features of the AD7091R-4BRUZ include ultralow power consumption: normal mode draws only 1.4 mW at 1 MSPS, and power-down mode draws 550 nA typical at VDD = 5.25 V and 435 nA at VDD = 3 V. The device also features a programmable ALERT interrupt pin (on 4- and 8-channel models) for monitoring out-of-range conditions. The on-chip 2.5 V reference eliminates the need for an external reference, simplifying design. The AD7091R-4BRUZ uses a flexible power/throughput rate management scheme, allowing the conversion rate to be adjusted to match the system's needs, thereby optimizing power consumption. The SPI interface supports data read after conversion, achieving a 1 MSPS throughput rate. The device also includes a channel sequencer that allows preprogrammed selection of channels to be converted sequentially, reducing microcontroller overhead. Typical applications include battery-powered instrumentation, portable medical devices, industrial process control, and data acquisition systems. The low power consumption and small package make it ideal for portable and battery-operated equipment. When designing with the AD7091R-4BRUZ, ensure that the analog input voltage does not exceed the supply voltage to avoid damage. Use a low-pass filter on the analog inputs to reduce noise and aliasing. The reference voltage is internally generated, but an external reference can be used if higher accuracy is required.
AD7091R-5BRUZ - 12-Bit Ultralow Power ADC | Analog Devices
The AD7091R-5BRUZ is a 12-bit, multichannel, ultralow power, successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates from a single 2.7 V to 5.25 V power supply and typically consumes only 24 µA at a 3 V supply in fast mode, making it ideal for battery-powered and portable applications. The device features four single-ended analog input channels with a channel sequencer, an on-chip conversion clock, and an accurate 2.5 V internal reference. It provides a 2-wire serial interface compatible with I2C, supporting standard and fast modes up to 400 kHz. The AD7091R-5BRUZ is available in a 20-lead TSSOP package, offering a compact solution for space-constrained designs. An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers, enabling digital systems to process real-world signals. The AD7091R-5BRUZ is a SAR (successive approximation register) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed, low power, and ease of use, making them suitable for a wide range of applications including data acquisition, industrial control, and medical instrumentation. The AD7091R-5BRUZ belongs to the family of data acquisition components, which are essential in bridging the analog and digital domains. Key features of the AD7091R-5BRUZ include its ultralow power consumption of 24 µA at 3 V, which extends battery life in portable devices. The on-chip 2.5 V reference eliminates the need for an external reference, reducing component count and board space. The I2C-compatible interface simplifies connection to microcontrollers and digital signal processors. The device also includes a programmable out-of-bounds user alert function, which can be used to monitor analog inputs and generate interrupts when values exceed preset thresholds. The channel sequencer allows automatic conversion of multiple channels without microcontroller intervention, reducing software overhead. From a technical perspective, the AD7091R-5BRUZ achieves a throughput of up to 1 MSPS with a 50 MHz SCLK, although the I2C interface limits the actual conversion rate to about 22.22 kSPS in fast mode. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial environments. The TSSOP-20 package has a thermal resistance of approximately 90°C/W, and the device is RoHS compliant. The internal reference has a typical accuracy of ±0.1% and a temperature coefficient of 10 ppm/°C, ensuring stable performance over temperature. Typical applications include portable instrumentation, battery monitoring, temperature sensing, and industrial process control. In portable medical devices, the ultralow power consumption is critical for extending battery life. In industrial settings, the wide operating temperature range and I2C interface make it easy to integrate with existing control systems. The AD7091R-5BRUZ is also suitable for data acquisition systems where multiple analog channels need to be monitored with minimal power consumption. When designing with the AD7091R-5BRUZ, it is important to ensure proper decoupling of the power supply pins with 0.1 µF and 10 µF capacitors. The reference pin should be bypassed with a 1 µF capacitor to ensure stable operation. The I2C bus requires pull-up resistors, typically 4.7 kΩ, to VDRIVE. For optimal performance, keep the analog input traces short and shielded from digital noise.
AD7091R-5BRUZ-RL7 - 4-Ch 12-Bit I2C ADC | Analog Devices
The AD7091R-5BRUZ-RL7 is a 12-bit, multichannel, ultralow power, successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates from a single 2.7 V to 5.25 V power supply and typically consumes only 24 µA at a 3 V supply in fast mode. The device provides a 2-wire serial interface compatible with I2C interfaces, making it ideal for space-constrained, battery-powered applications. An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital numbers. The AD7091R-5 is a SAR (successive approximation register) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed, low power, and small size, making them suitable for a wide range of applications from industrial process control to portable medical devices. As a data converter, it sits within the broader category of mixed-signal ICs, bridging the analog and digital domains. Key features include four single-ended analog input channels, an on-chip accurate 2.5 V reference, a channel sequencer for preprogrammed channel selection, and a programmable out-of-bounds user alert function. The device also features an on-chip conversion clock, eliminating the need for an external clock source. The I2C interface supports standard, fast, and high-speed modes, with a maximum throughput of 1 MSPS. The AD7091R-5 uses a low-power architecture that minimizes current consumption, with a typical supply current of 24 µA at 3 V in fast mode. The device includes a power-down mode that reduces current to less than 1 µA, extending battery life in portable applications. The internal reference provides a stable 2.5 V output, and the device can also operate with an external reference if required. Typical applications include battery monitoring, portable instrumentation, medical devices, and industrial process control. The I2C interface simplifies connection to microcontrollers and digital signal processors, while the small 20-lead TSSOP package saves board space. The device is specified over the industrial temperature range of -40°C to +125°C. When designing with this ADC, ensure that the analog input voltage does not exceed the supply voltage to avoid damage. Use a decoupling capacitor on the reference pin to maintain accuracy. The I2C address is set by the ADDR pin, allowing multiple devices on the same bus.
AD7124-4BBCPZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
The AD7124-4BBCPZ-RL7 is a low power, low noise, completely integrated analog front end for high precision measurement applications from Analog Devices. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) and can be configured to have four differential inputs or seven single-ended or pseudo differential inputs. The device operates from a 2.7 V to 3.6 V analog supply and a 1.8 V to 3.6 V digital supply, with a maximum output data rate of 19.2 kSPS. It is available in a 32-lead LFCSP (5x5 mm) package, making it suitable for space-constrained industrial and instrumentation designs. A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution, typically 16 to 24 bits. It is widely used in precision measurement applications where low noise and high accuracy are critical, such as temperature sensing, pressure measurement, and process control. The AD7124-4 belongs to the ADC family, specifically the precision sigma-delta ADC category, which is part of the broader data converter and analog front-end hierarchy. Key features of the AD7124-4BBCPZ-RL7 include a programmable gain amplifier (PGA) with gains from 1 to 128, a precision low drift internal band gap reference, and an external differential reference that can be internally buffered. The device offers three power modes (low, mid, and full) to optimize power consumption versus noise performance, with a typical current consumption of 350 µA in low power mode. It also includes a 50 Hz/60 Hz rejection filter, a 24-bit resolution, and an SPI-compatible serial interface. The AD7124-4 integrates a complete signal chain, including a multiplexer, PGA, sigma-delta modulator, digital filter, and reference, reducing external component count and simplifying design. The device supports both internal and external references, and its digital filter provides programmable output data rates and settling times. The ADC is designed for high precision measurement applications, offering excellent noise performance with a typical RMS noise of 1.5 µV at a gain of 128 and an output data rate of 25 SPS. Typical applications include smart transmitters, process control input modules, temperature and pressure measurement, and low power or battery-operated instrumentation. The AD7124-4 is also suitable for weigh scales, strain gauge sensors, and thermocouple or RTD measurements. Its low power consumption and high resolution make it ideal for portable and remote sensing applications. When designing with the AD7124-4, it is important to provide adequate decoupling on the AVDD and DVDD supplies and to place the reference decoupling capacitor close to the REFIN pins. The device's power mode should be selected based on the required noise performance and power budget, as higher power modes offer lower noise but increased current consumption.
AD7124-4BRUZ - 24-Bit Sigma-Delta ADC with PGA | Analog Devices
The Analog Devices AD7124-4BRUZ is a low power, low noise, completely integrated 24-bit sigma-delta analog front end (AFE) ADC that can be configured for 4 differential inputs or 7 single-ended or pseudo-differential inputs, housed in a 24-lead TSSOP package. A sigma-delta (Σ-Δ) analog-to-digital converter is a type of ADC that oversamples the input signal and applies digital filtering to achieve very high resolution, typically 16 to 32 bits, making it the dominant architecture for precision measurement. Within the signal chain hierarchy, the AD7124-4 sits at the highest integration level: it combines the ADC, a programmable gain amplifier (PGA), a precision low-drift internal band gap reference, reference buffering, excitation current sources, and a flexible digital filter in a single power-management-friendly device. Key features include the 24-bit resolution sigma-delta core, an integrated PGA that amplifies small sensor signals directly, an internal precision band gap reference that removes the need for an external reference in many designs, and a power mode architecture that lets designers trade current consumption against noise and speed. The device also accepts an external differential reference which can be internally buffered, further simplifying high-accuracy designs. Architecturally, the AD7124-4 establishes a high degree of signal chain integration: the low-noise PGA, reference buffers, and digital filtering are all on-chip, so a thermocouple, RTD, or bridge sensor can often be connected directly to the analog input pins. The digital interface is a standard SPI-compatible serial port with a DOUT/RDY multifunction pin, allowing simple connection to any microcontroller. Multiple filter options allow output data rate and 50 Hz/60 Hz rejection to be tuned in firmware. Typical applications include RTD and thermocouple temperature measurement, pressure and weigh-scale bridge transducers, process control analog inputs, portable instrumentation, and smart transmitters where low power and high resolution are simultaneously required. A key design consideration is the power mode selection: the lowest power mode maximizes battery life but increases rms noise and reduces available output data rates, so noise versus power must be balanced per application. This page synthesizes distributor sourcing data, verified drop-in alternatives, and practical design guidance not consolidated in the manufacturer datasheet.
AD7124-4BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
The AD7124-4BRUZ is a low power, low noise, completely integrated analog front end for high precision measurement applications from Analog Devices. It contains a 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) with a programmable gain amplifier (PGA) and an internal reference. The device can be configured to have four differential inputs or seven single-ended or pseudo differential inputs, making it highly flexible for various sensor and measurement applications. It is available in a 24-lead TSSOP package, operating over a temperature range of -40°C to +125°C. An analog-to-digital converter (ADC) is a device that converts a continuous analog signal into a discrete digital representation. The AD7124-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It is part of the precision ADC family, which is essential in applications requiring accurate measurement of physical quantities such as temperature, pressure, and strain. The AD7124-4 integrates key signal chain components, including a PGA, reference, and excitation current sources, reducing external component count and simplifying design. Key features of the AD7124-4BRUZ include a 24-bit resolution, low noise performance, and low power consumption. It offers a maximum output data rate of 19.2 kSPS, with programmable gain from 1 to 128. The device includes an internal band gap reference with low drift, and also accepts an external differential reference. It supports SPI communication, and includes diagnostic functions such as open-circuit detection and overvoltage monitoring. The AD7124-4 is recommended for new designs, with a 1ku list price starting from $6.55. The AD7124-4 uses a sigma-delta architecture with a digital filter, providing high resolution and rejection of out-of-band noise. The PGA allows direct connection of low-level sensors, such as thermocouples and strain gauges, without additional amplification. The device operates from a 2.7V to 3.6V analog supply and a 1.8V to 3.6V digital supply, with a typical current consumption of 1.2 mA in full power mode. The internal reference has a typical drift of 10 ppm/°C, ensuring stable measurements over temperature. Typical applications include temperature measurement with RTDs and thermocouples, pressure measurement with bridge sensors, and industrial process control. The AD7124-4 is also suitable for battery-powered portable instruments due to its low power consumption. Its integrated excitation current sources simplify RTD and thermocouple biasing, while the PGA and reference reduce external component count. When designing with the AD7124-4, ensure proper decoupling of the AVDD and DVDD supplies, and place the reference decoupling capacitor close to the REF pin. The SPI interface should be isolated if the ADC is used in noisy industrial environments. The device supports both internal and external references, and the choice depends on the required accuracy and temperature drift.
AD7124-4BRUZ-RL - 24-Bit Sigma-Delta ADC | Analog Devices
The AD7124-4BRUZ-RL is a low power, low noise, completely integrated analog front end for high precision measurement applications from Analog Devices. It contains a low noise, 24-bit sigma-delta analog-to-digital converter (ADC) and can be configured to have four differential inputs or seven single-ended or pseudo differential inputs. The device operates from a 2.7V to 3.6V analog supply and a 1.8V to 3.6V digital supply, with a typical current consumption of 1.2 mA in full power mode. It is available in a 24-lead TSSOP package, making it suitable for space-constrained industrial and instrumentation designs. An analog-to-digital converter (ADC) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. The AD7124-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It is part of the broader category of data acquisition systems, which are essential in bridging the analog world to digital processing. The AD7124-4 integrates a programmable gain amplifier (PGA), a precision voltage reference, and a temperature sensor, reducing the need for external components and simplifying the signal chain. Key features of the AD7124-4 include a 24-bit resolution, a maximum output data rate of 19.2 kSPS, and a root mean square (RMS) noise of 1.8 uV at a gain of 128 and an output data rate of 25 SPS. The device offers three power modes (full, mid, and low power) to optimize power consumption versus performance, with a current consumption of 1.2 mA, 0.6 mA, and 0.3 mA respectively. It also features a 50 Hz/60 Hz rejection mode, which is critical for industrial applications where power line interference is common. The integrated PGA provides gains from 1 to 128, allowing direct connection to low-level sensors such as thermocouples and strain gauges. The AD7124-4 uses a sigma-delta modulator with a digital filter, providing high resolution and excellent linearity. The device includes a 24-bit register map for configuration and data readback, and it communicates via a serial peripheral interface (SPI) that is compatible with 3-wire or 4-wire operation. The internal reference has a typical drift of 5 ppm/°C, ensuring stable measurements over temperature. The device also includes a burnout current source and a diagnostic function that can detect open or shorted sensor inputs, enhancing system reliability. Typical applications include smart transmitters, process control input modules, low power or battery operated instrumentation, and temperature measurement systems. The AD7124-4 is also suitable for pressure and strain gauge measurements, where its low noise and high gain are essential. The device is recommended for new designs and is available in a tape and reel package (RL suffix) for automated assembly. When designing with the AD7124-4, it is important to provide a clean analog supply and a stable reference. The device requires a 100 nF decoupling capacitor on the AVDD and DVDD pins, and a 1 uF capacitor on the REFOUT pin. The SPI interface should be isolated from noisy digital circuits to maintain the ADC's noise performance. The device also supports a power-down mode, which can be used to conserve power in battery-operated systems.
AD7124-4BRUZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
The AD7124-4BRUZ-RL7 is a low power, low noise, completely integrated analog front end for high precision measurement applications from Analog Devices. It contains a low noise, 24-bit sigma-delta analog-to-digital converter (ADC) and can be configured to have 4 differential inputs or 7 single-ended or pseudo differential inputs. The device operates from a 2.7V to 3.6V analog supply and a 1.8V to 3.6V digital supply, with a maximum output data rate of 19.2 kSPS. It includes an integrated programmable gain amplifier (PGA) with gains from 1 to 128, an internal band gap reference, and an external differential reference option. The AD7124-4 is available in a 24-lead TSSOP package, making it suitable for space-constrained designs. An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers. The sigma-delta ADC architecture uses oversampling and noise shaping to achieve high resolution, making it ideal for precision measurement applications. The AD7124-4 is part of the ADC family, specifically a high-resolution, low-power sigma-delta converter, which is a key component in data acquisition systems, sensor interfaces, and industrial process control. Key features of the AD7124-4BRUZ-RL7 include a 24-bit resolution, low noise performance (RMS noise as low as 1.8 uV at a gain of 128), and low power consumption (typically 1.1 mA in full power mode). The device also offers a 50 Hz/60 Hz rejection mode, a 24-bit sigma-delta modulator, and a flexible SPI interface. The integrated PGA allows direct connection to low-level sensors such as thermocouples, RTDs, and strain gauges, eliminating the need for external amplification. The AD7124-4 uses a sigma-delta modulator with a digital filter, providing excellent noise performance and linearity. The device includes a precision, low noise, low drift internal band gap reference, and also accepts an external differential reference, which can be internally buffered. The ADC supports multiple power modes (full, mid, and low power) to optimize power consumption versus performance. The device is specified over the -40°C to +125°C temperature range, making it suitable for industrial and automotive applications. Typical applications include temperature measurement (thermocouples, RTDs, thermistors), pressure measurement, flow measurement, and industrial process control. The AD7124-4 is also used in battery-powered instrumentation, portable medical devices, and smart transmitters. Its low power consumption and high resolution make it ideal for loop-powered applications. When designing with the AD7124-4, ensure proper decoupling of the AVDD and DVDD supplies with 0.1 uF and 10 uF capacitors. The reference input should be bypassed with a 1 uF capacitor. For best noise performance, use a low-noise external reference if the internal reference is not sufficient. The SPI interface should be isolated if the ADC is used in noisy industrial environments.
AD7124-8BCPZ - 24-Bit Sigma-Delta AFE, 8-Ch, PGA | Analog Devices
The Analog Devices AD7124-8BCPZ is a low-power, low-noise, completely integrated analog front end for high-precision measurement applications. This 24-bit sigma-delta analog-to-digital converter (ADC) integrates a programmable gain amplifier (PGA), a precision internal bandgap reference, and a flexible input multiplexer supporting 8 differential or 15 pseudo-differential channels, all in a 32-lead LFCSP (5x5 mm) package. It operates from a 2.7V to 3.6V supply (with AVDD tolerant to 5V on selected rails) and delivers output data rates up to 19.2 kSPS through a 4-wire SPI interface. An analog-to-digital converter is a mixed-signal device that converts continuous analog signals into discrete digital codes, and a sigma-delta ADC is one of the most accurate architectures, using oversampling and noise-shaping to push quantization noise out of the signal band. Within the data converter hierarchy, the AD7124-8 is not just an ADC - it is a complete analog front end (AFE) that combines the modulator, digital filter, PGA, and reference into a single die, placing it above simple SAR or stand-alone sigma-delta converters in system integration. By eliminating the external precision reference and most of the input signal conditioning, the AD7124-8 collapses the typical sensor-measurement signal chain into a single device. Key features include 24-bit resolution, RMS noise as low as 1.8 uV at the 25 SPS output data rate, typical full-power-mode current of 1.2 mA, a programmable output data rate from 1.17 SPS to 19.2 kSPS, and an integrated PGA with gains from 1 to 128 for direct connection to low-level sensors such as thermocouples and strain gauges. Three user-programmable power modes (full, mid, low) allow designers to trade off noise against supply current at the system level. Architecturally, the second-order sigma-delta modulator feeds a configurable digital filter, and the device offers simultaneous-50Hz/60Hz-rejection modes for industrial instrumentation. The 24-bit register map and SPI-compatible serial interface simplify integration with microcontrollers and DSPs. Typical applications include direct thermocouple and RTD temperature measurement, weigh scales, pressure and flow transmitters, industrial process-control analog input modules, and battery-cell monitoring. A design tip: bypass AVDD and DVDD with separate 10 uF and 0.1 uF capacitors, use a clean analog ground plane, and populate REFIN+/FOUT inputs with a 10 uF capacitor to keep reference noise below the ADC noise floor. Prices are referenced as of 2026-10-06 from distributor stock.
AD7124-8BCPZ-RL7 - 24-Bit 8/15-Ch Sigma-Delta ADC | ADI
The Analog Devices AD7124-8BCPZ-RL7 is a low-power, low-noise, completely integrated analog front end for high-precision measurement applications, delivering 24-bit sigma-delta conversion with up to 8 differential or 15 single-ended/pseudo-differential input channels. Housed in a 32-lead LFCSP (5 mm x 5 mm) package, the device integrates a precision low-noise bandgap reference, a programmable gain amplifier (PGA), and an output data rate up to 19.2 kSPS, making it well suited for direct interfacing with strain gauges, RTDs, thermocouples, and other low-level sensor bridges. An ADC (Analog-to-Digital Converter) is a data-converter integrated circuit that translates a continuous analog voltage or current into a discrete digital code; the sigma-delta topology used here oversamples the input at a high modulator rate and uses digital filtering to push quantization noise out of the signal band, yielding excellent effective resolution at low update rates. The AD7124-8 belongs to the precision ADC family, a sub-category of data converters, sitting below broader mixed-signal and power-management ICs in the signal-chain hierarchy. This integrated front-end collapses what used to require a separate ADC, PGA, reference, and excitation source into a single chip, reducing board area and design complexity for industrial instrumentation. Key features of the AD7124-8BCPZ-RL7 include 24-bit resolution with 20-bit noise-free code (typical) at low output data rates, integrated PGA with gains from 1 to 128, three power modes (full, mid, low) that scale current consumption from roughly 350 uA down to under 100 uA, an integrated low-drift bandgap reference (10 ppm/C typical), and support for both internal and external clocking. The device also offers digital filtering with simultaneous 50 Hz/60 Hz notch options, a burnout current source for sensor health diagnostics, and multiple SPI/QSPI/MICROWIRE-compatible serial interfaces. Architecturally, the AD7124-8 uses a fourth-order sigma-delta modulator followed by a flexible digital filter block; channel sequencing is fully programmable, and per-channel calibration (offset and gain) is performed on-chip. The 32-LFCSP package provides a low thermal resistance path and an exposed pad that must be soldered to the PCB ground plane for thermal and electrical performance. Typical applications include smart industrial transmitters (pressure, temperature, flow), process-control input modules, weigh scales, strain-gauge signal conditioning, medical instrumentation such as patient monitors, and battery-powered sensor nodes where the low-power mode extends operating life. The wide supply range (2.7 V to 3.6 V analog, 1.65 V to 3.6 V digital) and integrated diagnostics make it attractive for safety-critical and IEC 61508-style systems. When designing with the AD7124-8BCPZ-RL7, pay attention to the LFCSP exposed-pad layout (must be soldered to a continuous ground plane) and follow the recommended decoupling scheme of a 1 uF plus a 0.1 uF capacitor on each supply pin; also note that the -RL7 suffix indicates a 7-inch reel packing rather than a different silicon variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet page.
AD7172-2BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
The AD7172-2BRUZ is a low power, 24-bit, 31.25 kSPS, sigma-delta analog-to-digital converter (ADC) from Analog Devices. It features true rail-to-rail analog and reference input buffers, integrated digital filtering, and a flexible SPI interface. The device operates from a 2.5 V to 5.5 V supply and is available in a 24-lead TSSOP package. A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is ideal for precision measurement applications where low noise and high accuracy are required. The AD7172-2 belongs to the family of sigma-delta ADCs, which are widely used in industrial process control, medical instrumentation, and weigh scales. Key features include 24-bit resolution, 31.25 kSPS output data rate, 2 fully differential or 4 single-ended input channels, true rail-to-rail buffers, and a programmable digital filter. The device also offers a 50 Hz/60 Hz rejection mode, offset and gain calibration, and a 2.5 V internal reference. The integrated buffers simplify the interface to high-impedance sensors. The AD7172-2 uses a sigma-delta modulator with a digital filter that can be configured for various output data rates and settling times. The device includes a multiplexer that allows each analog input to be configured independently. The SPI interface supports read/write access to the configuration registers and conversion results. Typical applications include temperature measurement, pressure sensing, weigh scales, and industrial process control. The low power consumption and high resolution make it suitable for battery-powered and portable instruments. When designing with the AD7172-2, ensure that the reference input is properly decoupled and that the analog input signals are within the common-mode range. The device requires an external reference for best performance, such as the ADR445 or ADR444.