AD7683BCPZRL - 16-Bit 100kSPS PulSAR ADC | Analog Devices
부품 번호: AD7683BCPZRL ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $11.81 | $11.81 |
| 10 | $10.63 | $106.30 |
| 100 | $9.45 | $945.00 |
| 500 | $8.27 | $4,135.00 |
| 1,000 | $7.09 | $7,090.00 |
AD7683BCPZRL 개요
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.
드롭인 대체품: AD7683BCPZRL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7683BCPZRL (동일 폼 팩터 및 풋프린트) — 차이점: Architecture, Package, Input Type, Supply Voltage (VDD), Resolution.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7683ACPZRL
✅ 드롭인✓ 재고 있음
$5.45 / 개
데이터시트 보기 →AD7683BCPZRL7
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7685BCPZRL7
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7683BCPZRL 최대 정격 & 전기적 특성
| 분해능 | 16 bits |
| 샘플링 속도 | 100 kSPS |
| Number of Input Channels | 1 |
| Architecture | SAR (PulSAR charge-redistribution) |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Analog Input Range | 0 V to VREF (pseudo-differential, unipolar) |
| Reference Voltage Range | Up to VDD |
| INL | ±1 LSB typical, ±3 LSB maximum (B grade) |
| Missing Codes | None (B grade) |
| 인터페이스 | Serial SPI-compatible, QSPI, MICROWIRE, DSP-compatible |
| 패키지 | 8-LFCSP-WD (3x3 mm) with exposed pad |
| Conversion Clock | Internal |
| 동작 온도 | -40 °C to +85 °C (industrial) |
| Track-and-Hold | Integrated, low-noise, wide bandwidth, short aperture delay |
| 실장 유형 | Surface Mount |
AD7683BCPZRL 핀 구성
| 핀 1 | VDD — Power supply input (2.7 V to 5.5 V) |
| 핀 2 | GND — Ground reference |
| 핀 3 | REF — Reference voltage input (up to VDD) |
| 핀 4 | IN+ — Analog input positive (pseudo-differential) |
| 핀 5 | IN- — Analog input negative (ground sense, pseudo-differential return) |
| 핀 6 | SCK — Serial clock input (SPI) |
| 핀 7 | SDOUT — Serial data output (SPI) |
| 핀 8 | CNV — Conversion start input (active low) |
일반적인 애플리케이션
AD7683BCPZRL 적합 용도: 6 애플리케이션s: Industrial Process Control / PLC Analog Input, Portable Battery-Powered Instrumentation, Weigh Scale / Load-Cell Digitizer, Multichannel Data Acquisition Modules, Medical Patient Monitoring (Diagnostic-Grade Spot Measurement), Industrial Sensor Readout (Thermocouple / RTD Conditioning).
Industrial Process Control / PLC Analog Input
The AD7683BCPZRL's 16-bit B-grade no-missing-code linearity and 100 kSPS throughput make it well-matched to PLC analog input modules reading 4-20 mA or 0-10 V sensor signals. Powered directly from a 3.3 V or 5 V PLC backplane rail, it accepts a 0 V to VREF pseudo-differential input that maps onto standard sensor scaling; the SPI port interfaces cleanly with PLC microcontrollers, and the –40 °C to +85 °C industrial rating suits factory-floor cabinets. Compared with delta-sigma converters the SAR architecture provides deterministic cycle time, enabling fixed-latency closed-loop control.
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Portable Battery-Powered Instrumentation
The AD7683BCPZRL's low multi-mW power budget at full 100 kSPS throughput and its software-controlled power-down mode (sub-µA between conversions) make it a strong fit for handheld multimeters, field data loggers, and battery-powered industrial recorders. The 3x3 mm LFCSP-WD package keeps board area minimal inside compact enclosures. Designers pair it with an Analog Devices nano-power reference and a low-power Cortex-M MCU for months-long battery life on LiSOCl2 cells.
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Weigh Scale / Load-Cell Digitizer
In weigh-scale designs the AD7683BCPZRL pairs with a load-cell bridge and an instrumentation amplifier to digitize strain-gauge output at 16 bits with ±3 LSB max INL, achieving stable readability down to sub-gram increments on consumer kitchen scales. The charge-redistribution SAR architecture exhibits no inherent latency between conversion trigger and SPI readback, so successive weighments can be processed back-to-back at full 100 kSPS. The low-noise track-and-hold is tolerant to the relatively high source impedance of an unbuffered bridge.
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Multichannel Data Acquisition Modules
When multiplexing multiple analog inputs through an external MUX, the AD7683BCPZRL's 100 kSPS SAR architecture and 8-LFCSP-WD footprint allow several of these ADCs to populate each channel on compact PCBA modules. The SPI-compatible serial interface enables individual CS lines per ADC for parallel conversion, with throughput achievable at 100 kSPS per channel. This makes the part a common choice for industrial rack-mounted DAQ units and PCI/PCIe-based digitizer boards requiring high channel density.
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Medical Patient Monitoring (Diagnostic-Grade Spot Measurement)
The AD7683BCPZRL's 16-bit B-grade INL and high CMRR input structure suit diagnostic-grade spot measurements of low-level biosignals, including pulse oximetry, body-temperature NTC readings, and sweat-electrode impedance. The single 2.7-5.5 V rail simplifies battery-powered wearable architectures. Designers must still validate against IEC 60601 patient-leakage and isolation requirements, but the part is widely used in the data-acquisition sub-system of bedside and ambulatory monitors.
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Industrial Sensor Readout (Thermocouple / RTD Conditioning)
For thermocouple and RTD-based temperature monitoring chains, the AD7683BCPZRL digitizes the conditioned low-level DC output of an op-amp chain (typically mV-scale for type-K thermocouples) at 16-bit resolution and 100 kSPS. The pseudo-differential 0-V-to-VREF input accepts the post-amplified thermocouple signal directly when VREF is set near the amplifier common-mode. Determinstic SAR latency enables single-shot conversion triggers tied to Mains-noise synchronous sampling.
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추천 제품 요약
엔지니어링 참조 데이터: AD7683BCPZRL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7683ACPZRL | AD7683BCPZRL7 | AD7685BCPZRL7 |
|---|---|---|---|---|
| Package | 8-LFCSP-WD (3x3 mm) with exposed pad | 8-LFCSP-WD (3x3) - same | 8-LFCSP-WD (3x3) - same | 8-LFCSP-WD (3x3) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 250 kSPS |
| INL (B grade) | ±1 LSB typ / ±3 LSB max | A grade (looser INL) | ±1 LSB typ / ±3 LSB max | ±1 LSB typ / ±3 LSB max |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Interface | Serial SPI-compatible | Serial SPI-compatible | Serial SPI-compatible | Serial SPI-compatible |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Grade | B grade (no missing codes) | A grade | B grade | B grade |
주요 차별점
- Drop-in pin-compatible upgrade to A-grade AD7683ACPZRL (vs AD7683ACPZRL)
- Higher throughput alternative in identical footprint (vs AD7685BCPZRL7)
- No external conversion clock required (vs Generic SAR competitors)
설계 노트
Per the Analog Devices AD7683 datasheet, place analog input traces, REF bypass capacitors, and the analog ground plane on one side of the package, and digital interface (SCK, SDOUT, CNV) traces on the opposite side. Avoid routing digital lines directly under the package unless an unbroken ground plane is provided between them and the die to act as a noise shield. This decoupling strategy is critical because the SAR decision phase can couple switching transients into the analog reference if the ground plane is fragmented.
Bypass VDD with at least a 1 µF low-ESR ceramic capacitor placed as close as possible to the VDD pin, and add a 100 nF decoupling cap in parallel for high-frequency noise suppression. REF pin requires its own 10 µF bypass to ground to ensure the SAR charge-redistribution network settles within the acquisition window. Insufficient REF decoupling directly increases DNL and degrades SNR, especially at high sampling rates.
For sensors with output impedance above 1 kΩ, add a wideband op-amp buffer (e.g., AD823 or AD8628) between the sensor and the AD7683 IN+ input. The pseudo-differential 0 V to VREF input draws transient switching charge from the analog source every conversion; an unbuffered high-impedance source can cause non-linear settling errors that look like additional DNL. Series 10 Ω resistors on the analog inputs and REF, combined with 1 nF X7R capacitors to ground, form a low-pass anti-alias filter without degrading linearity.
Do not omit the exposed pad (EP) solder connection - the EP is the primary thermal and electrical ground path. An unsoldered EP increases junction temperature, lifts ground inductance, and degrades SNR. Also, assert CNV low for at least 20 ns before each conversion trigger and observe the listed tconv acquisition time before sampling SCK - violations produce ACQ-stage timing errors and missed codes on intermittent samples. Mark in firmware that conversion start is edge-triggered, not level-triggered.
규정 준수 정보
RoHS and lead-free status per Analog Devices product page. No AEC-Q100 automotive-grade variant exists for the AD7683 family; choose a different ADC for automotive qualified designs.
