ADC/DAC
Produtos (2518)
AD7674ACPZRL - 18-Bit 800 kSPS SAR ADC | Analog Devices
The Analog Devices AD7674ACPZRL is an 18-bit, 800 kSPS, fully differential successive-approximation-register (SAR) analog-to-digital converter (ADC) housed in a 48-lead LFCSP (LFCSP-48, 7x7 mm with exposed pad) package and shipped on tape-and-reel. It operates from a single 5 V supply, offers ±VREF (5 V typical) differential input range, and delivers no pipeline delay thanks to its SAR architecture, with parallel or serial data interface options. A successive-approximation-register ADC is a precision data-conversion topology that performs a single conversion per cycle, returning the result immediately after each completed conversion rather than after a fixed pipeline latency. This makes SAR ADCs ideal for multiplexed data acquisition, motor control feedback, and any system that requires deterministic per-sample latency. The AD7674 family sits in the precision-industrial segment, above general-purpose 12/14-bit SAR ADCs but below high-speed pipeline ADCs, offering 18-bit resolution with 2.5 LSB INL at 800 kSPS. Key specifications include 18-bit resolution with no missing codes, ±VREF differential input range, throughput of 800 kSPS in Warp mode and 666 kSPS in normal mode, 2.5 LSB INL, and both parallel and serial digital interfaces. The device supports -40C to +85C industrial temperature range, single 5 V analog supply with 3 V or 5 V digital supply option, and an internal conversion clock. The LFCSP-48 package with exposed pad provides low thermal resistance for high-throughput industrial designs. The AD7674 uses a charge-redistribution DAC core with internal error-correction logic to achieve 2.5 LSB INL and guaranteed 18-bit no-missing-codes performance. The Warp mode allows the fastest throughput (800 kSPS) for AC signals where the converter is allowed to recycle after each conversion, while normal mode provides 666 kSPS with lower power. The differential input architecture rejects common-mode noise from industrial sensors and motor-drive environments. Typical applications include industrial process control, multichannel data acquisition systems, instrumentation, motor control current sensing, and medical imaging front ends. The combination of 18-bit resolution and SAR determinism makes it well suited to multiplexed systems that read multiple channels sequentially. When designing with the AD7674, ensure the reference voltage source has low noise and adequate drive strength, and keep analog and digital ground returns separated back at the exposed pad of the LFCSP-48. The Warp-mode throughput requires the input settling time to be met within one conversion cycle; use a low-impedance front-end buffer if driving from high-impedance sensors. This page consolidates distributor pricing, LFCSP-48 drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7675ACPZRL - 16-Bit 100kSPS Differential SAR ADC | Analog Devices
The Analog Devices AD7675ACPZRL is a 16-bit, 100 kSPS, differential-input successive approximation register (SAR) analog-to-digital converter housed in a 48-lead LFCSP-VQ (7x7 mm) package with exposed pad, supplied on tape and reel. The part delivers ±2.5 V true bipolar differential input range from a single 5 V supply, integrates 16-bit resolution with no missing codes, and provides 1.5 LSB max INL (equivalent to 0.0015% of full scale). A SAR ADC is a precision converter that resolves a sampled analog voltage one bit per clock cycle using a binary-weighted capacitor network and a comparator, settling to its final code without pipeline latency. The AD7675 belongs to the broader ADC family -> data converters -> mixed-signal ICs -> semiconductors, and is targeted at precision multi-channel data-acquisition front ends where DC accuracy and AC linearity must coexist. Key features include 94 dB typical SNR at 45 kHz input, -110 dB typical THD at 45 kHz, both AC and DC specified performance, parallel (8-/16-bit) and serial 5 V/3 V logic interfaces, SPI-/QSPI-/MICROWIRE-/DSP-compatible serial modes, single 5 V analog supply operation, and 15 mW typical power dissipation at 100 kSPS. The LFCSP-48 exposed pad keeps thermal resistance low enough for the 15 mW dissipation without an external heat sink. The internal architecture combines a high-bandwidth differential track-and-hold, a precision 16-bit charge-redistribution SAR core, and an on-chip reference buffer. The lack of pipeline delay makes the part immediately usable in multiplexed systems, servo loops, and event-triggered sampling applications where latency must be deterministic. Typical applications include industrial process control and data acquisition, medical instrumentation, spectrum and vibration analysis, automated test equipment (ATE), and precision multi-channel instrumentation. The bipolar ±2.5 V input also simplifies direct connection to load-cell bridges and thermocouple front-ends after signal conditioning. When designing with this device, pair the analog supply with a 10 uF + 0.1 uF decoupling network placed within 5 mm of the AVDD pin, and solder the exposed pad to a continuous ground pour to achieve the rated thermal performance. Source-impedance should remain below 50 ohm to avoid degrading THD at the rated sample speed.
AD7678ACPZRL - 18-Bit 100kSPS SAR ADC | Analog Devices
The Analog Devices AD7678ACPZRL is an 18-bit, 100 kSPS successive-approximation (SAR) analog-to-digital converter (ADC) housed in a 48-lead LFCSP-VQ (7x7 mm) package with exposed pad. It features ±2.5 LSB INL (max), ±VREF differential input range (with VREF = 5 V), and a single 5 V analog supply that simplifies system power architecture. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples continuous analog voltage signals and outputs discrete digital codes for downstream processors, FPGAs, or DSPs. SAR ADCs use a binary-search charge-redistribution architecture with a low-noise comparator and precision DAC array to resolve one bit per clock cycle; they offer deterministic, no-latency conversion with no pipeline delay, which makes them ideal for multiplexed channel acquisition, control loops, and precision instrumentation where signal fidelity must be preserved sample-by-sample. Key features of the AD7678ACPZRL include 18-bit resolution with no missing codes, throughput of 100 kSPS, support for both parallel and serial (SPI/QSPI/MICROWIRE-compatible) data interfaces, and integrated input protection. The device operates from a single 5 V analog supply (AVDD) plus a digital supply range that supports 5 V or 3 V logic (DVDD). An internal 2.5 V reference is available on-chip with the option to drive an external reference for higher accuracy. Typical applications include industrial process control (multi-channel data-acquisition boards, PLC analog front ends), precision medical instrumentation (patient monitoring, diagnostic analyzers), automatic test equipment (ATE) digitizers, and high-end instrumentation. Engineers also leverage the AD7678 family for spectroscopy, weigh scales, and precision sensor signal chains where 18-bit dynamic range, low distortion, and ac-accuracy guarantee reliable measurements. When designing with this ADC, allocate analog and digital supply decoupling as close to the pins as possible and provide a solid ground plane under the exposed pad for thermal dissipation. The serial interface mode reduces pin count, but for maximum throughput use the parallel interface to avoid serial-clock bottlenecks at full 100 kSPS. Always refer to the manufacturer datasheet for the full DC and AC timing specifications.
AD7679ACPZRL - 18-Bit 570kSPS SAR ADC | Analog Devices
The Analog Devices AD7679ACPZRL is an 18-bit, 570 kSPS successive-approximation-register (SAR) analog-to-digital converter housed in a 48-lead LFCSP-VQ (7x7) package. According to the Analog Devices AD7679 datasheet (Rev. B), the part delivers no-missing-code 18-bit resolution with an INL of ±2.5 LSB max, supports differential input ranges up to ±VREF (VREF = 5 V), and provides throughput up to 570 kSPS with zero pipeline delay. A SAR ADC is a successive-approximation analog-to-digital converter that uses a binary-search algorithm and a sample-and-hold front end to digitize an analog input one code at a time. Unlike pipelined or delta-sigma converters, SAR ADCs deliver a valid conversion result in a single conversion cycle without latency, making them ideal for multiplexed multi-channel data acquisition and control loops where deterministic response is required. The AD7679 sits in the precision ADC tier of the data-converter hierarchy (precision ADC → ADC → data converter → signal chain IC → semiconductor). Key features include 100 dB typical SNR at 2 kHz input with VREF = 5 V, selectable 18-/16-/8-bit parallel bus or serial 5 V/3 V SPI/QSPI/MICROWIRE/DSP-compatible interface, an on-board reference buffer, single 5 V supply operation, and a power dissipation of 76 mW at 500 kSPS dropping to 150 µW at 1 kSPS. The part is offered in both 48-lead LQFP and 48-lead LFCSP, with the LFCSP variant (ACP suffix) targeted at space-constrained designs. The ACPZRL suffix indicates tape-and-reel packaging and Pb-free compliance. The AD7679 architecture is pin-to-pin compatible with the AD7674, AD7676, and AD7678, providing a direct upgrade path within the PulSAR family. This pin compatibility allows designers to swap resolutions or sample rates on the same PCB footprint without layout changes, which is rare in the precision-ADC market. Typical applications include CT scanners, high-dynamic-range data acquisition systems, geophone and hydrophone sensor front ends, instrumentation, spectrum analysis, medical instruments, and as a low-power multichannel replacement for sigma-delta converters. When designing with the AD7679, place input and reference decoupling capacitors as close as possible to the analog and REF pins, and use the AD8021 (or equivalent low-noise, fast-settling op amp) as the front-end driver to preserve 18-bit settling at full throughput. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7679ASTZRL - 18-Bit 570 kSPS SAR ADC | Analog Devices
The Analog Devices AD7679ASTZRL is an 18-bit, 570 kSPS successive-approximation-register (SAR) analog-to-digital converter in a 48-pin LQFP (7x7 mm) package, supplied on a 13-inch tape-and-reel. The part features differential ±VREF input range (VREF = 5 V), no pipeline delay thanks to its SAR architecture, and serial or parallel (18-/16-/8-bit bus) digital output. A SAR ADC is a type of data converter that performs a binary-search conversion on a held analog input, returning one bit per clock cycle with no latency. SAR ADCs sit within the broader data-acquisition hierarchy of data converters -> ADCs -> successive-approximation ADCs -> high-precision instrumentation ADCs, and are valued for their deterministic latency, excellent DC linearity, and zero pipeline-delay behavior compared to pipeline or delta-sigma architectures. Key features include 2.5 LSB maximum INL (no missing codes), 100 dB typical SNR at 2 kHz input (VREF = 5 V), on-chip reference buffer, and single 5 V supply operation. Power dissipation is 76 mW at 500 kSPS and scales down to 150 µW at 1 kSPS for low-duty-cycle acquisition. The AD7679 is a pin-to-pin compatible upgrade of the AD7674, AD7676, and AD7678, allowing direct performance upgrades on existing 48-LQFP boards. The part uses Analog Devices' PulSAR architecture with an internal conversion clock, internal reference buffer, and selectable serial or parallel interface. The 5 V/3 V interface is compatible with SPI, QSPI, MICROWIRE, and DSP hosts. The 48-LQFP variant supports both serial and parallel modes, while the 48-LFCSP variant is intended for space-constrained serial-mode designs. Typical applications include industrial process control loops, multichannel data-acquisition boards, medical instrumentation front ends, spectrum and vibration analysis, and any 18-bit precision measurement channel where deterministic SAR latency simplifies system-level synchronization. When designing, ensure the input driver amplifier settles to better than 18-bit accuracy within the acquisition window. The AD8021 is the typical choice; verify settling at 18-bit level rather than 0.1% because 18-bit settling is far more demanding. Decouple AVDD and DVDD separately and place the reference bypass capacitor close to the REF pin. This page synthesizes distributor pricing, pin-compatible alternatives within the PulSAR family, and PCB-level design notes not found in the standalone manufacturer datasheet.
AD7680ARM - 16-Bit 100kSPS SAR ADC | Analog Devices
The Analog Devices AD7680ARM is a 16-bit, fast, low-power successive approximation register (SAR) analog-to-digital converter that operates from a single 2.5 V to 5.5 V supply and achieves throughput rates up to 100 kSPS in a 6-pin SOT-23 (MO-178AB) package. This ADC integrates a low-noise, wide-bandwidth track-and-hold amplifier, an internal conversion clock, and a versatile serial interface, making it well suited for compact, battery-powered designs. The 6-lead SOT-23 footprint occupies roughly 8 mm² of board area, dramatically smaller than the larger MSOP alternatives while still delivering true 16-bit performance. A SAR ADC is a type of analog-to-digital converter that performs a binary search through an internal capacitive DAC to determine each digital output code, one bit per conversion clock cycle. SAR ADCs are valued for low latency, deterministic behavior, and excellent DC accuracy. They sit under the broader hierarchy of ADC -> data converter -> signal chain IC -> semiconductor. The AD7680 specifically targets low-power, mid-speed instrumentation where successive-approximation precision outweighs the throughput needs of pipeline or flash converters. Key specifications include 16-bit resolution with no missing codes, 100 kSPS maximum throughput, ±5 V input range with single-supply operation from 2.5 V to 5.5 V, and typical power dissipation of 3 mW at 100 kSPS with a 2.5 V supply (rising to about 16.7 mW at 5 V). The serial interface is SPI/QSPI/MICROWIRE-compatible, allowing direct connection to most microcontrollers and DSPs without glue logic. The part offers ±0.4 LSB typical DNL, ±0.7 LSB typical INL, and an SNR of approximately 86 dB for high-quality signal acquisition. Architecturally, the AD7680 uses a charge-redistribution SAR core with an input bandwidth exceeding 1.5 MHz on the track-and-hold front end. The internal oscillator eliminates the need for an external clock source in most applications, and the power-down mode reduces consumption to microwatts between conversions, an essential feature for handheld instrumentation. The wide input bandwidth preserves signal integrity well beyond the Nyquist limit of the 100 kSPS sample rate, simplifying anti-aliasing filter design. Typical applications include portable data acquisition modules, weigh scales and load-cell digitizers, industrial process control loops, and battery-powered medical instrumentation such as patient monitors. The wide input range lets it digitize signals directly from 0 V to VDD without external signal conditioning in many single-ended configurations. For design success, place a 0.1 µF decoupling capacitor as close as possible to the AVDD pin and keep analog and digital grounds on separate planes joined at a single point beneath the device. Because the device offers no internal buffer on REF, a low-noise external reference such as the ADR291 is recommended when DC accuracy below 1 LSB matters. This page synthesizes distributor stock data, drop-in alternatives, and practical SOT-23 layout tips not collected in the datasheet alone.
AD7680ARM-REEL - 16-Bit 100kSPS PulSAR ADC | Analog Devices
The Analog Devices AD7680ARM-REEL is a 16-bit, low-power successive-approximation (SAR) analog-to-digital converter that delivers up to 100 kSPS throughput from a single 2.5 V to 5.5 V supply, housed in an 8-lead MSOP package. It integrates a low-noise wide-bandwidth track-and-hold capable of handling input frequencies above 7 MHz, and offers typical power dissipation of 3 mW at 100 kSPS with a 2.5 V supply and 16.7 mW with a 5.5 V supply. An SAR ADC is a successive-approximation-register analog-to-digital converter, a subtype within the broader ADC category that performs bit-by-bit binary search conversion using an internal DAC and comparator. SAR ADCs occupy the middle of the converter hierarchy between flash converters (fastest, lowest resolution) and sigma-delta converters (slowest, highest resolution), offering an excellent balance of speed, resolution, and power. The AD7680 belongs to the PulSAR family from Analog Devices, which is positioned in the data converter > ADC > precision ADC > SAR ADC taxonomy and serves battery-powered and precision industrial systems. Key features include a SPI-/DSP-compatible serial interface, a -40C to +85C industrial operating range, single-ended analog input, and internal conversion clock. The -REEL suffix indicates Tape & Reel packaging for high-volume surface-mount assembly, while the base AD7680ARM denotes the MSOP-8 industrial-grade variant (the same silicon is also offered in a 6-lead SOT-23 as AD7680ART). Typical applications include portable instrumentation, battery-powered data acquisition, isolated sensor front ends, optical modules, and medical monitoring equipment. Its 16-bit no-missing-codes performance and 100 kSPS throughput make it well suited for multi-channel multiplexed systems where the small 8-MSOP footprint enables dense PCB layouts. When designing, ensure the reference voltage (REF) is well decoupled with a low-ESR ceramic cap and that the SCK idle-low mode is used for daisy-chain configurations. The digital I/O lines should be kept short to minimize coupling from the digital supply into the analog input.
AD7680BRMZ-REEL - 16-Bit 100kSPS SAR ADC | Analog Devices
The Analog Devices AD7680BRMZ-REEL is a 16-bit, 100 kSPS, successive approximation register (SAR) analog-to-digital converter housed in an 8-pin MSOP package with an exposed thermal pad. It operates from a single 2.5 V to 5.5 V supply, supports pseudo-differential analog inputs with an input range of 0 V to VREF (where VREF is set between 2.5 V and 5.5 V), and achieves ±2 LSB INL (max) with no missing codes at 16 bits. Typical power dissipation is only 3 mW at 100 kSPS with 5 V supply and scales down to microwatts at lower throughputs, making this part a benchmark for low-power precision conversion. A SAR ADC is a converter architecture that performs a binary search through an internal capacitor DAC and comparator network to resolve the input voltage in N clock cycles for an N-bit result. Compared with delta-sigma and pipeline architectures, SAR ADCs combine true 16-bit no-latency sampling with low power consumption, which is why they dominate battery-powered instrumentation, data acquisition modules, and process-control front-ends. Within the converter hierarchy, the AD7680 occupies the SAR -> precision ADC -> data converter -> signal chain IC position. Key features of the AD7680 family include a wide-bandwidth, low-noise track-and-hold front end that handles input frequencies well in excess of the Nyquist rate, an internal conversion clock that eliminates the need for an external crystal, a high-speed serial interface compatible with SPI/QSPI/MICROWIRE/DSP, and a power-down mode that reduces consumption to nanowatt levels between conversions. The 8-MSOP exposed-pad package keeps the PCB footprint under 15 mm² while providing a thermal path to the ground plane. The device architecture pairs the SAR core with a precision reference input, allowing the system designer to use any low-drift external reference from 2.5 V to 5.5 V (including the ADR45xx family) to set the conversion scale. The serial output streams MSB-first, simplifying firmware on most microcontrollers. The part is specified over the −40 °C to +85 °C industrial temperature range. Typical applications include portable and battery-powered instrumentation, transducer/sensor signal conditioning, data acquisition systems, and process control loops where the combination of true 16-bit resolution, 100 kSPS throughput, and 3 mW dissipation is decisive. Designers appreciate the lack of pipeline latency, which simplifies single-shot and multiplexed front-end designs. When laying out the PCB, place the 0.1 µF decoupling capacitor as close as possible to the VDD pin and tie the exposed pad to a clean analog ground plane to minimize digital-coupling noise. Choosing an external reference with low broadband noise (such as ADR4525) preserves the ADC's effective resolution at very low input amplitudes. This page consolidates distributor pricing, drop-in 8-MSOP alternatives, and practical design notes for engineers evaluating the AD7680BRMZ-REEL against newer or competing ADC solutions.
AD7682BCPZ - 16-Bit 4-Ch 250kSPS SAR ADC | Analog Devices
The AD7682BCPZ is a 16-bit, 4-channel, 250 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It operates from a single power supply, VDD, and features a charge redistribution architecture with no missing codes. The device includes a 4-channel low crosstalk multiplexer that can be configured for unipolar single-ended, differential (GND sense), or pseudobipolar inputs, making it highly versatile for multichannel data acquisition systems. The AD7682BCPZ is housed in a 20-lead LFCSP (4x4 mm) package, offering a compact solution for space-constrained designs. 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 excellent accuracy, making it ideal for applications such as industrial process control, medical instrumentation, and portable battery-powered devices. The AD7682BCPZ is part of the PulSAR family, which is recognized for its high performance and ease of use. Key features of the AD7682BCPZ include 16-bit resolution with no missing codes, a maximum sampling rate of 250 kSPS, and an internal low drift reference that can be selected at 2.5 V or 4.096 V. The device also offers a wide input voltage range, low power dissipation, and a flexible serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSPs. The internal multiplexer allows the user to configure the inputs as single-ended, differential, or bipolar, providing design flexibility. The AD7682BCPZ uses a charge redistribution SAR architecture, which ensures high linearity and low noise. The device includes an internal reference buffer and a track-and-hold circuit, simplifying the external component count. The ADC operates from a 2.3 V to 5.5 V supply, and the digital interface can operate from 1.8 V to 5.5 V, allowing easy interfacing with low-voltage digital logic. The power dissipation is typically 12 mW at 250 kSPS, making it suitable for power-sensitive applications. Typical applications for the AD7682BCPZ include multichannel data acquisition systems, industrial process control, medical instrumentation, and battery-powered portable devices. Its high resolution and low power consumption make it ideal for precision measurement and monitoring systems. The device is also suitable for use in automotive and aerospace applications where reliability and accuracy are critical. When designing with the AD7682BCPZ, it is important to provide a clean, low-noise power supply and to place decoupling capacitors close to the VDD and REF pins. The reference input should be bypassed with a 10 uF capacitor to ensure stable operation. The serial interface should be configured for the appropriate clock speed and data format, and the conversion result can be read via the SDO pin. Proper PCB layout, including a solid ground plane and short traces, is essential to achieve the specified performance.
AD7683ACPZRL - 16-Bit 100kSPS PulSAR ADC | Analog Devices
The Analog Devices AD7683ACPZRL is a 16-bit, charge-redistribution, successive-approximation-register (SAR) analog-to-digital converter (ADC) that operates from a single 2.7V to 5.5V power supply and delivers up to 100 kSPS throughput in an 8-lead LFCSP-WD (3 mm × 3 mm) package with an exposed pad. The part contains a low-power, high-speed 16-bit sampling ADC with no missing codes (B-grade), an internal conversion clock, and a serial, SPI-compatible interface that also supports QSPI, MICROWIRE, and DSP serial interfaces. An analog-to-digital converter is a semiconductor device that converts a continuous-time, continuous-amplitude analog signal into a discrete-time, discrete-amplitude digital code. The PulSAR family from ADI uses charge-redistribution capacitor arrays and a successive-approximation register to perform bit-by-bit conversions, achieving a balance of low power consumption, high accuracy, and fast sampling. ADCs sit within the broader taxonomy of data converters -> mixed-signal ICs -> power management and signal chain semiconductors, and are typically used as the bridge between analog sensors and digital processors. Key specifications include 16-bit resolution with no missing codes, ±1 LSB typical (B-grade) integral nonlinearity (INL), a pseudo-differential analog input range of 0 V to VREF (where VREF can equal VDD up to 5.5 V), 100 kSPS sampling rate, and SPI/QSPI/MICROWIRE/DSP-compatible serial interface. The 8-lead LFCSP-WD with exposed pad provides low thermal resistance (~38 °C/W) suitable for compact industrial layouts. The AD7683 uses a charge-redistribution DAC array combined with a precision comparator and SAR logic; this architecture delivers excellent DC accuracy and low noise at low power (typically 1.5 mW at 100 kSPS with 3 V supply). Pseudo-differential input simplifies single-ended sensor signal conditioning while preserving good common-mode rejection. Typical applications include portable instrumentation, battery-powered data acquisition, industrial process control (4 mA to 20 mA loop digitization), precision weigh scales, and isolated sensor front-ends (with digital isolators such as ADuM1411). The wide supply range (2.7 V to 5.5 V) makes it compatible with both 3.3 V and 5 V MCUs. When designing with this device, place the 0.1 µF supply bypass capacitor within a few millimetres of the VDD pin and tie the exposed pad to a solid analog ground plane to minimize thermal resistance and digital switching noise coupling into the analog input. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes that complement the manufacturer datasheet and accelerate your selection process.
AD7683BCPZ - 16-Bit 250kSPS PulSAR ADC | Analog Devices
The AD7683BCPZ is a 16-bit, charge redistribution, successive approximation, PulSAR analog-to-digital converter (ADC) from Analog Devices. It operates from a single power supply, VDD, between 2.7 V and 5.5 V, and features a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. The AD7683BCPZ is available in an 8-lead LFCSP (CP-8-2) package, offering a compact solution for precision data acquisition systems. An analog-to-digital converter (ADC) is a device that converts continuous analog signals into discrete digital numbers. The AD7683 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, low power, and excellent accuracy, making them ideal for applications such as industrial process control, medical instrumentation, and portable battery-powered devices. The AD7683 belongs to the PulSAR family of ADCs, which are renowned for their high performance and ease of use. Key features of the AD7683BCPZ include 16-bit resolution with no missing codes, a maximum sampling rate of 250 kSPS, and a typical power dissipation of only 12.5 mW at 5 V. The device offers a pseudo-differential analog input, an SPI-compatible serial interface, and a reference input that can be driven by an external reference. The AD7683 also includes a busy indicator and a power-down mode to conserve energy during idle periods. The AD7683 uses a charge redistribution architecture with an internal conversion clock, eliminating the need for an external clock. The track-and-hold circuit has a short aperture delay, ensuring accurate sampling of high-frequency signals. The device operates over the industrial temperature range of -40°C to +85°C and is available in a lead-free, RoHS-compliant package. Typical applications for the AD7683BCPZ include battery-powered instruments, data acquisition systems, industrial process control, medical devices, and portable electronics. Its low power consumption and small package make it suitable for space-constrained designs. The SPI-compatible interface simplifies connection to microcontrollers and DSPs. When designing with the AD7683, ensure that the reference voltage is stable and noise-free, as it directly affects conversion accuracy. Use a low-pass filter on the analog input to remove high-frequency noise, and place decoupling capacitors close to the VDD and REF pins. The device's power-down mode can be used to reduce power consumption between conversions.
AD7683BCPZRL - 16-Bit 100kSPS PulSAR ADC | Analog Devices
The Analog Devices AD7683BCPZRL is a 16-bit, 100 kSPS successive-approximation PulSAR analog-to-digital converter housed in an 8-lead LFCSP-WD (3x3 mm) package with an exposed thermal pad. According to the Analog Devices datasheet, the device operates from a single 2.7 V to 5.5 V supply and uses a charge-redistribution SAR architecture to deliver 16-bit resolution with no missing codes (B grade), typical INL of ±1 LSB, and a maximum INL of ·3 LSB across the full temperature range. A successive-approximation register (SAR) ADC is a precision data-converter type that compares the sampled input against an internal binary-weighted capacitor DAC one bit per conversion cycle. PulSAR is Analog Devices' proprietary name for its family of low-power, high-speed, charge-redistribution SAR ADCs. SAR ADCs sit within the broader data-converter family alongside delta-sigma ADCs and pipeline ADCs; they are favored where low-latency single-shot conversions, deterministic throughput, and excellent DC linearity are required. The AD7683BCPZRL integrates a low-noise, wide-bandwidth track-and-hold with short aperture delay, an internal conversion clock, and a serial SPI-compatible digital interface. A pseudo-differential analog input accepts a 0 V to VREF unipolar range, with VREF allowed up to VDD. The compact LFCSP-8 (3x3) footprint and SPI interface make the part a strong fit for channel-dense PCBAs that must keep board area, BOM count, and firmware complexity to a minimum. The device consumes only a few milliwatts at full throughput, enabling continuous 100 kSPS conversion without thermal concerns and supporting battery-powered portable instruments. Its pseudo-differential input and high-impedance sampling front end make the part resilient to source-impedance variation, simplifying analog front-end design for transducer, sensor, and process-control signal chains. Typical uses include industrial process control loop sensing, multichannel data-acquisition modules, portable medical instruments, weigh-scale and strain-gauge digitizers, and precision sensor readout. The +2.7 V to +5.5 V supply range maps directly onto common 3.3 V and 5 V rails, and the SPI port simplifies isolation in high-noise industrial systems. When designing with this ADC, observe the layout guidance in the Analog Devices datasheet: keep the analog signals on one side of the package and the digital signals on the other, use a solid ground plane beneath the part, and route digital traces away from the analog inputs to minimize digital-noise coupling into the sampled signal. This page synthesizes distributor pricing benchmarks, B-grade SAR pin-compatible alternatives, and practical PCB-layout guidance from the Analog Devices datasheet in one consolidated reference - information typically scattered across the manufacturer datasheet, distributor listings, and individual application notes.
AD7684BCPZ - 16-Bit 100kSPS PulSAR ADC | Analog Devices
The AD7684BCPZ is a 16-bit, charge redistribution, successive approximation, PulSAR analog-to-digital converter (ADC) from Analog Devices. It operates from a single power supply, VDD, between 2.7 V and 5.5 V, and features a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a serial SPI-compatible interface. The device is available in a 20-lead LFCSP (4x4 mm) package, offering a compact solution for precision data acquisition systems. What is a successive approximation register (SAR) ADC? 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 typically consists of a comparator, a digital-to-analog converter (DAC), and a successive approximation register. SAR ADCs are known for their high speed, low power consumption, and excellent accuracy, making them ideal for applications such as industrial process control, medical instrumentation, and portable battery-powered devices. They are a subset of the broader ADC family, which also includes delta-sigma and pipeline converters, and are widely used in data acquisition systems. Key features of the AD7684BCPZ include a 16-bit resolution with no missing codes, a throughput of 100 kSPS, and a differential input. The device also features a low noise performance, with a typical SNR of 92 dB and a typical THD of -110 dB. It includes an internal conversion clock and a serial interface that is SPI-compatible, simplifying integration with microcontrollers and DSPs. The power consumption is typically 4.5 mW at 5 V and 2.5 mW at 2.7 V, making it suitable for power-sensitive applications. The AD7684BCPZ uses a charge redistribution architecture, which provides inherent sample-and-hold functionality and excellent linearity. The device includes a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies up to 45 kHz. The reference input is buffered, allowing the use of low-cost external references. The device also features a power-down mode that reduces current consumption to 1 uA, ideal for battery-powered systems. Typical applications for the AD7684BCPZ include battery-powered instrumentation, portable medical devices, data acquisition systems, and industrial process control. Its high accuracy and low power make it an excellent choice for applications where precision and energy efficiency are critical. When designing with the AD7684BCPZ, ensure that the reference voltage is stable and well-decoupled, as it directly affects the conversion accuracy. The analog input should be driven by a low-impedance source, and proper layout techniques should be used to minimize noise and parasitic capacitance.
AD7685ARMZRL7 - 16-Bit 250 kSPS PulSAR ADC | Analog Devices
The Analog Devices AD7685ARMZRL7 is a 16-bit, 250 kSPS PulSAR successive approximation register (SAR) analog-to-digital converter with no missing codes, housed in a 10-lead MSOP (RM-10) package supplied on tape and reel. It operates from a single supply VDD of 2.3 V to 5.5 V and communicates over a SPI/MICROWIRE/QSPI/DSP-compatible serial interface. A SAR ADC is a type of analog-to-digital converter that successively approximates the input voltage using a binary search algorithm with a capacitive DAC. Within the signal-chain hierarchy, the AD7685 sits between the analog front end (amplifiers, filters, sensors) and the digital controller, converting real-world signals into 16-bit digital words for processing. PulSAR is Analog Devices' proprietary SAR architecture optimized for low power and high accuracy. Key features include 16-bit resolution with no missing codes, 250 kSPS maximum throughput, INL of +/-0.6 LSB typical and +/-2 LSB maximum, and a separate VIO logic supply compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic. The pseudo-differential input with wide common-mode range, together with the low-noise analog input lowpass filter formed by RIN and CIN, allows a noisier driver amplifier to still meet a given system noise specification. Technical depth: the AD7685 uses a charge-redistribution SAR core with an internal conversion clock, so no external clock is required for conversion. Its noise performance is lower than most other 16-bit ADCs per the Analog Devices datasheet, contributing to higher effective resolution in practical systems. Operation is specified from -40 C to +85 C. Typical applications include battery-powered portable instrumentation, industrial process control data acquisition, and medical monitoring equipment, where the 250 kSPS rate and low power consumption fit multi-channel scanning systems. Design consideration: the separate VIO pin lets you drop logic level to 1.8 V for modern microcontrollers, but keep the REF pin decoupled with low-ESR ceramics to preserve linearity. This page synthesizes distributor pricing, drop-in alternatives, pinout detail, and practical design notes not found in the manufacturer datasheet alone.
AD7685BCPZ - 16-Bit 250kSPS PulSAR ADC | Analog Devices
The AD7685BCPZ is a 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices, operating from a single 2.3 V to 5.5 V power supply. It achieves a throughput of 250 kSPS with no missing codes, making it ideal for high-precision data acquisition systems. The device is available in a compact 10-lead LFCSP-WD (3x3 mm) package, suitable for space-constrained designs. 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 employs a charge redistribution capacitor array to perform the conversion, offering a balance of speed, resolution, and power consumption. SAR ADCs are widely used in applications requiring high accuracy and moderate sampling rates, such as industrial process control, medical instrumentation, and portable battery-powered devices. Key features of the AD7685BCPZ include 16-bit resolution with no missing codes, a 250 kSPS sampling rate, and a low power consumption of typically 3.5 mW at 5 V supply. The device also features a pseudo-differential input, an SPI-compatible serial interface, and a power-down mode for energy savings. The LFCSP package provides excellent thermal performance and a small footprint, enabling high-density PCB layouts. The AD7685 uses a charge redistribution architecture with an internal track-and-hold circuit, ensuring accurate sampling of the input signal. The device includes a precision reference input that can be driven by an external reference, allowing flexibility in system design. The SPI interface supports daisy-chaining of multiple ADCs, simplifying multi-channel data acquisition systems. Typical applications include battery-powered instrumentation, data acquisition systems, industrial process control, and medical devices. The AD7685's low power and high accuracy make it suitable for portable and remote sensing applications where power efficiency is critical. When designing with the AD7685BCPZ, ensure a clean analog supply and a stable reference voltage to achieve optimal performance. Proper PCB layout with adequate decoupling and grounding is essential to minimize noise and maximize SNR.
AD7685CCPZ-R2 - 16-Bit 250 kSPS SAR ADC | Analog Devices | LFCSP-10
The Analog Devices AD7685CCPZ-R2 is a 16-bit, 250 kSPS successive-approximation-register (SAR) analog-to-digital converter that operates from a single 2.3 V to 5.5 V supply, housed in a 10-pin LFCSP-WD (3x3) package with exposed die pad. According to the Analog Devices AD7685 datasheet, it integrates a low-power, high-speed 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile digital interface. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a precision data converter architecture that resolves one bit per clock cycle by switching a charge-redistribution capacitor DAC against the input signal. The SAR architecture is the de-facto choice for applications requiring low latency, deterministic acquisition, and excellent DC accuracy at moderate sampling rates; it sits hierarchically under ADC -> data converter -> signal chain IC -> semiconductor. Compared to delta-sigma converters, SAR ADCs deliver faster settling with no digital decimation delay. Key features of the AD7685 include 16-bit resolution with no missing codes, true differential analog input, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and a low 4 mW typical power dissipation at 250 kSPS with 5 V supply. The internal oscillator and reference buffer remove the need for external clock or buffer components, enabling compact BOM-precision or data acquisition front ends. The wide 2.3 V-5.5 V supply range supports both 3.3 V and 5 V system rails. Architecturally, the AD7685 uses a charge-redistribution switched-capacitor DAC core with inherent sample-and-hold, followed by a precision successive-approximation register and digital error correction. The LFCSP-WD-10 (3x3) package provides a thermal pad that must be soldered to the PCB ground plane to achieve the rated AC and DC performance, since the die pad is the primary thermal and electrical return. Typical applications include industrial process control (4-20 mA loop digitization), portable instrumentation and battery-powered data loggers, precision sensor signal conditioning, and medical monitoring front ends. When designing with the AD7685, ensure the exposed pad is soldered to a grounded copper pour of at least 10 mm^2; missing this connection degrades linearity. Use short, symmetric analog input traces and place the reference decoupling capacitor within 5 mm of the REF pin to preserve 16-bit performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single-source reference for selecting the AD7685CCPZ-R2 in precision data-acquisition designs.
AD7686BCPZ - 16-Bit 500kSPS PulSAR ADC | Analog Devices
The AD7686BCPZ is a 16-bit, 500 kSPS successive approximation (SAR) analog-to-digital converter (ADC) from Analog Devices, featuring a PulSAR architecture. It operates from a single 2.3V to 5.5V power supply and is available in a 10-lead LFCSP-WD (3x3 mm) package. The device offers a high-speed serial interface (SPI) and a pseudo-differential analog input, making it suitable for a wide range of precision data acquisition applications. An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values. The AD7686 is a SAR ADC, which uses a binary search algorithm to determine the digital output, offering a good balance of speed, resolution, and power consumption. SAR ADCs are widely used in industrial, medical, and instrumentation systems where high accuracy and moderate sampling rates are required. Key features of the AD7686BCPZ include a maximum sampling rate of 500 kSPS, 16-bit resolution with no missing codes, and a typical signal-to-noise ratio (SNR) of 92 dB. The device also features a low power dissipation of 12.5 mW at 500 kSPS, which scales with throughput, making it ideal for battery-powered applications. The pseudo-differential input allows for flexible signal conditioning, and the SPI-compatible serial interface simplifies connection to microcontrollers and DSPs. The AD7686 uses a charge redistribution (capacitive DAC) architecture with an internal reference buffer, achieving excellent linearity and low noise. The device includes a 1-pole low-pass filter on the analog input, which helps to reduce external noise. The LFCSP package provides a compact footprint and good thermal performance, enabling dense PCB layouts. Typical applications include portable instrumentation, medical devices, data acquisition systems, and industrial process control. The high SNR and low power make it suitable for battery-operated equipment where power efficiency is critical. The device is also used in vibration analysis, motor control, and other precision measurement systems. When designing with the AD7686BCPZ, ensure that the reference voltage is stable and well-decoupled. The analog input should be driven by a low-impedance source to maintain accuracy. The serial interface timing must be respected to avoid data corruption. Proper PCB layout, including a solid ground plane and short traces, is essential for achieving the specified performance.
AD7686BCPZ-R2 - 16-Bit 500 kSPS SAR ADC | Analog Devices
The Analog Devices AD7686BCPZ-R2 is a 16-bit, single-channel, 500 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) housed in a 10-pin LFCSP-WD (3x3) package with an exposed pad. It operates from a single 5 V supply (VDD) and a logic interface supply (VIO) from 2.3 V to 5.5 V, integrating a low-power, high-speed sampling ADC with no missing codes, an internal conversion clock, and a versatile serial SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface. The part's typical power dissipation is around 10 mW at 500 kSPS and drops to less than 1 µW in full power-down, supporting portable and thermally constrained applications. A successive-approximation ADC (SAR ADC) is a sampled-data converter that performs one bit-trial per clock cycle using a charge-redistribution digital-to-analog converter (DAC) and a comparator. In the broader signal-chain taxonomy, the AD7686 sits in the precision-medium-speed tier between general-purpose SAR ADCs (<100 kSPS, 12-14 bit) and high-speed pipeline ADCs (>1 MSPS, 14-16 bit). It is widely used as a precision front end where 16-bit resolution at moderate sampling rates is required, including instrumentation, process control, and data acquisition front ends. Key features of the AD7686BCPZ-R2 include 16-bit resolution (no missing codes), 500 kSPS throughput, a single-ended analog input range of 0 V to VREF (or 0 V to 2xVREF in bipolar mode), an internal 2.5 V or external reference option, true differential analog inputs, single-supply 5 V operation with 2.3 V-5.5 V logic compatibility, low power consumption of approximately 10 mW at full speed, and SPI/QSPI/MICROWIRE/DSP-compatible serial interface with chain-mode daisy chaining. The on-chip temperature sensor and integrated input protection further simplify board design. The architecture combines a charge-redistribution capacitive DAC with a high-speed comparator and successive-approximation register, achieving 16-bit performance with no pipeline latency. This makes the part ideal for multiplexed applications and DC measurements where latency must be deterministic. The -R2 reel designation refers to the small-quantity reel package, and the BC speed grade designates 500 kSBS throughput. Typical applications include industrial process control and PLC analog input modules, precision data acquisition systems, medical instrumentation front ends, battery-powered portable measurement devices, optical sensor monitoring, and multichannel data-acquisition systems with channel-to-channel isolation. The wide input common-mode range and robust ESD rating make it well-suited for harsh industrial environments. A key design consideration is the choice between the internal 2.5 V reference and an external low-noise reference. While the internal reference saves board area, an external ADR445 or ADR01 reference improves SNR by up to 3 dB in demanding instrumentation applications. Decoupling of the VDD and VIO rails with 10 µF tantalum and 0.1 µF ceramic capacitors placed within 5 mm of the supply pins is recommended in the datasheet typical-application circuit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
AD7687BCPZ - 16-Bit 250kSPS PulSAR ADC | Analog Devices
The AD7687BCPZ is a 16-bit, 250 kSPS successive approximation (SAR) analog-to-digital converter (ADC) from Analog Devices, part of the PulSAR family. It features a differential input and operates from a single 2.3 V to 5.5 V supply, with a separate VIO pin for digital interface compatibility with 1.8 V, 2.5 V, 3 V, or 5 V logic. The device is housed in a compact 10-lead LFCSP-WD (3x3 mm) package, making it suitable for space-constrained applications. An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital numbers. The AD7687 is a SAR ADC, which uses a successive approximation register algorithm to perform conversions with high speed and accuracy. SAR ADCs are widely used in data acquisition systems, industrial process control, and medical instrumentation due to their excellent balance of speed, resolution, and power consumption. The AD7687 belongs to the PulSAR family, known for its low power and high precision. Key features of the AD7687BCPZ include 16-bit resolution with 1.5 LSB INL (integral nonlinearity), a maximum sampling rate of 250 kSPS, and a differential input range of ±VREF. The device offers a serial SPI-compatible interface with daisy-chain capability and an optional BUSY indicator via the SDI pin. Power consumption scales linearly with throughput, enabling low-power operation in battery-powered systems. The ADC also features a pseudo-differential input option and a dedicated VIO pin for flexible logic-level interfacing. Technically, the AD7687 uses a charge-redistribution capacitive DAC architecture, which provides inherent sample-and-hold functionality and excellent linearity. The device includes an internal reference buffer, but an external reference voltage (VREF) is required, typically ranging from 0.5 V to VDD. The ADC achieves a signal-to-noise ratio (SNR) of 92 dB and a total harmonic distortion (THD) of -108 dB, making it suitable for high-precision measurement applications. The LFCSP package offers a small footprint with an exposed pad for improved thermal performance. Typical applications include portable instrumentation, battery-powered data loggers, medical devices such as patient monitors, and industrial process control. The AD7687's low power consumption (typically 4.5 mW at 250 kSPS) and small package make it ideal for these applications. The SPI interface simplifies connection to microcontrollers and DSPs, and the daisy-chain feature allows multiple ADCs to share a single bus. When designing with the AD7687, ensure that the reference voltage is stable and well-decoupled, as it directly affects conversion accuracy. The VIO pin must be connected to the appropriate logic supply to match the host interface voltage. Proper PCB layout with separate analog and digital ground planes is recommended to minimize noise and achieve optimal performance.
AD7687BCPZ-R2 - 16-Bit 250kSPS PulSAR Differential ADC | Analog Devices
The Analog Devices AD7687BCPZ-R2 is a 16-bit, 1.5 LSB INL, 250 kSPS PulSAR differential analog-to-digital converter (ADC) housed in a 10-pin LFCSP-WD (3x3) package with an exposed pad. It operates from a single 2.3 V to 5.5 V VDD supply, integrates a low-power high-speed 16-bit sampling ADC with no missing codes, and supports a separate VIO logic supply for 1.8 V, 2.5 V, 3.3 V, or 5 V digital interface compatibility. Throughput scales linearly with sample rate, allowing users to trade speed for power. A successive-approximation register (SAR) ADC, also known as a PulSAR, performs conversion through charge redistribution on a capacitive DAC. This architecture delivers deterministic latency (no pipeline delay), inherent sample-and-hold behavior, and excellent DC accuracy, making SAR ADCs the preferred topology for precision multiplexed data acquisition, industrial instrumentation, and motor control feedback. Within the broader taxonomy, SAR ADCs sit under data converters -> ADCs -> precision ADCs. Key features include a true differential analog input, ±VREF common-mode range, 1.5 LSB maximum INL, no missing codes at 16 bits, low power consumption proportional to throughput, an SPI-compatible serial interface with optional BUSY indicator via SDI, and daisy-chain capability for multi-ADC 3-wire buses. The integrated reference input and compact LFCSP-10 footprint simplify board layout while keeping noise immunity high through the exposed thermal pad tied to ground. The internal conversion is governed by a precision DAC and comparator clocked by an internal oscillator; a single CNV rising edge initiates acquisition and conversion, and the BUSY line signals completion. Power dissipation scales linearly with throughput, so at 250 kSPS the part consumes its maximum rated current while at reduced sample rates power drops proportionally - a useful trait for battery-instrumented designs. Typical applications include industrial process control and PLC analog input modules, medical instrumentation signal acquisition, battery-powered portable sensors, multi-channel data acquisition systems (DAQ), motor and motion control feedback loops, and precision weigh scales. The differential input and excellent DC accuracy make it especially suited to bridge and thermocouple front ends. When designing with the AD7687BCPZ-R2, treat the exposed pad as the primary thermal and ground path - solder it to a sufficiently large ground plane. Use a low-noise reference (such as the ADR45xx family) and keep analog/digital ground returns separated until they join under the IC's exposed pad to preserve CMRR. This page consolidates distributor pricing, drop-in alternatives, and applied design notes that go beyond the manufacturer datasheet's content to accelerate your precision-ADC design.
AD7687BCPZRL - 16-Bit 250kSPS Differential SAR ADC | Analog Devices
The Analog Devices AD7687BCPZRL is a 16-bit, 250 kSPS, differential-input, successive-approximation-register (SAR) analog-to-digital converter (ADC) housed in a 10-pin LFCSP-WD (3 mm x 3 mm) package with an exposed pad for thermal dissipation. A SAR ADC is a precision data converter that performs a binary search against the analog input using an internal capacitive DAC and comparator, returning fully-settled conversion results in a deterministic number of clock cycles. Within the broader converter hierarchy, the AD7687 belongs to the successive-approximation family, which sits between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, lowest bandwidth). SAR ADCs are widely favored in multiplexed data-acquisition systems, control loops, and precision instrumentation because of their deterministic latency, low latency to first valid sample, and lack of pipeline delay. Key specifications for the AD7687BCPZRL include 16-bit resolution with no missing codes, 250 kSPS throughput, INL of +/-0.4 LSB typical and +/-1.5 LSB maximum, dynamic range of 96.5 dB, and signal-to-noise-plus-distortion (SINAD) measured at 20 kHz. The device accepts a true differential analog input and operates from a single 2.5 V to 5.5 V analog supply, with a separate VIO logic supply that allows 1.8 V, 2.5 V, 3.3 V, or 5 V digital interfacing without level shifters. The SPI-compatible serial interface supports 3-wire and 4-wire modes, optional BUSY indication through the SDI pin, and daisy-chaining of multiple converters on a single 3-wire bus. Typical applications include industrial process control and PLC analog input modules, multichannel data-acquisition systems, medical instrumentation front-ends, and precision sensor signal chains. The combination of high dynamic range, low noise, and small 3 mm x 3 mm footprint also makes it well suited for portable battery-powered measurement equipment where PCB real estate is constrained. When designing with the AD7687BCPZRL, place the decoupling capacitors as close as possible to the analog and digital supply pins, route the analog and digital grounds as separate planes joined at a single point beneath the exposed pad, and ensure that the REF pin is driven by a low-noise, low-drift reference such as the ADR45xx family to avoid degrading the converter's noise performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet and accelerate your evaluation of the AD7687BCPZRL for precision analog front-end designs.
AD7688BCPZ - 16-Bit 500kSPS PulSAR ADC | Analog Devices
The AD7688BCPZ is a 16-bit, 500 kSPS successive approximation (SAR) analog-to-digital converter (ADC) from Analog Devices, featuring a true differential input and a tiny 10-lead LFCSP-WD (3x3 mm) package. It operates from a single 2.3 V to 5.5 V supply and provides excellent DC and AC performance, including ±0.4 LSB typical INL, 96.5 dB dynamic range, and 95.5 dB SNR at 20 kHz. The device uses the PulSAR architecture, which combines a capacitive DAC with a high-speed comparator to achieve fast, accurate conversions with low power consumption. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to determine the digital output. It compares the input signal against a reference voltage using a successive approximation register, converging to the final value in N steps for an N-bit converter. SAR ADCs are widely used in data acquisition systems, industrial process control, medical instrumentation, and portable devices due to their high resolution, low latency, and low power consumption. The AD7688 belongs to the PulSAR family, known for its high precision and ease of use. Key features of the AD7688BCPZ include 16-bit resolution with no missing codes, a throughput of 500 kSPS, and a true differential analog input range that can be configured for unipolar or bipolar operation. The device offers a serial interface (SPI) that operates at clock speeds up to 50 MHz, allowing for high-speed data transfer. It also includes a busy indicator and a conversion result readback feature, simplifying system integration. The LFCSP package is lead-free and RoHS compliant, making it suitable for environmentally conscious designs. Technically, the AD7688 uses a charge redistribution architecture with an internal reference buffer, eliminating the need for an external reference driver in many applications. The device provides excellent linearity with a maximum INL of ±1.5 LSB (±23 ppm of FSR) and a THD of -118 dB at 20 kHz, ensuring high-fidelity signal acquisition. The input range is fully differential, allowing the ADC to reject common-mode noise and improve dynamic performance. The device operates over the industrial temperature range of -40°C to +85°C, making it suitable for harsh environments. Typical applications include high-speed data acquisition systems, medical imaging equipment, industrial process control, and portable instrumentation. The AD7688's combination of high speed, high resolution, and low power makes it ideal for battery-powered devices where performance and efficiency are critical. Its small package footprint also enables compact PCB designs. When designing with the AD7688BCPZ, ensure that the reference voltage is stable and well-decoupled, as it directly affects conversion accuracy. Use a low-noise reference such as the ADR4550 and place decoupling capacitors close to the VDD and VIO pins. The differential input should be driven with a low-impedance source to maintain linearity.
AD7690BCPZRL7 - 18-Bit 400kSPS PulSAR ADC | Analog Devices
The AD7690BCPZRL7 is an 18-bit, successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices, offering a 400 kSPS throughput in a compact 10-lead LFCSP-WD (3x3 mm) package. It operates from a single 5V supply (VDD) and features a differential input, an internal conversion clock, and a versatile SPI-compatible serial interface. The device guarantees no missing codes over the full operating temperature range, making it suitable for precision measurement applications. An ADC (analog-to-digital converter) is an electronic component that converts a continuous analog voltage into a discrete digital representation. SAR ADCs use a binary search algorithm to approximate the input voltage, balancing speed and resolution. The AD7690 belongs to the PulSAR family, known for low power consumption and high accuracy, and is part of the broader class of data converters used in signal processing chains. Key features include 18-bit resolution with no missing codes, integral nonlinearity (INL) of ±0.75 LSB typical and ±1.5 LSB maximum (±6 ppm of FSR), and a dynamic range that scales with throughput. The device supports daisy-chaining via the SDI input, allowing multiple ADCs on a single 3-wire bus, and includes an optional busy indicator. It is compatible with 1.8V, 2.5V, 3V, or 5V logic through a separate VIO supply. The AD7690 uses a low-power, high-speed 18-bit sampling ADC architecture with an internal conversion clock, eliminating the need for external clocking. The power consumption scales linearly with throughput, enabling efficient operation in battery-powered systems. The differential input provides excellent common-mode rejection, and the device is specified from 4.75V to 5.25V. Typical applications include precision data acquisition systems, medical instrumentation, industrial process control, and vibration analysis. The high resolution and low noise make it ideal for sensor interfaces where accuracy is critical. The small LFCSP package saves board space, and the SPI interface simplifies connection to microcontrollers and DSPs. When designing with the AD7690, ensure a clean, low-noise analog supply and proper decoupling. The reference input should be driven by a low-impedance source, and the layout should minimize parasitic capacitance on the analog inputs to maintain specified performance.
AD7690BRMZ - 18-Bit 400kSPS PulSAR ADC | Analog Devices
The AD7690BRMZ is an 18-bit, successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices, offering a 400 kSPS throughput in a compact 10-lead MSOP package. It operates from a single 5V supply (VDD) and features a differential input with a maximum integral nonlinearity (INL) of 1.5 LSB, ensuring high accuracy for precision measurement applications. The device includes an internal conversion clock and a versatile SPI-compatible serial interface that supports daisy-chaining multiple ADCs on a single 3-wire bus, with an optional busy indicator. It is compatible with 1.8V, 2.5V, 3V, or 5V logic via a separate VIO supply, making it flexible for various digital host interfaces. An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital numbers, enabling digital processing of real-world signals. SAR ADCs use a binary search algorithm to approximate the input voltage, offering a good balance of speed, resolution, and power consumption. The AD7690 belongs to the PulSAR family, known for low power and high precision, and is widely used in data acquisition systems, industrial process control, and medical instrumentation. Key features of the AD7690BRMZ include 18-bit resolution with no missing codes, a 400 kSPS sampling rate, and a power dissipation that scales linearly with throughput. The differential input range is ±VREF, with VREF ranging from 2.3V to 5.25V, allowing flexible reference configurations. The device also offers a pseudo-differential mode for single-ended applications. The SPI interface supports daisy-chaining, reducing the number of digital lines required in multi-channel systems. Technically, the AD7690 uses a charge redistribution architecture with a capacitive DAC, achieving excellent linearity and low noise. The internal conversion clock eliminates the need for an external clock, simplifying design. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial environments. The MSOP-10 package is small, saving board space, and is available in tape and reel for automated assembly. Typical applications include high-speed data acquisition, industrial process control, medical imaging, and battery-powered instrumentation. The high resolution and speed make it ideal for precision measurement systems where accuracy is critical. The low power consumption, which scales with throughput, is beneficial for portable devices. When designing with the AD7690BRMZ, ensure a clean, low-impedance reference voltage and adequate decoupling on VDD and VIO. The differential input should be driven with a low-impedance source to maintain accuracy. For best performance, use a precision reference and careful PCB layout to minimize noise.