AD976BRS - 16-Bit 100 kSPS SAR ADC | Analog Devices
부품 번호: AD976BRS ✓ 활성AD976BRS 개요
An ADC is a semiconductor that converts an analog voltage into a digital number. Within the signal-chain hierarchy, the AD976BRS belongs to the ADC category, uses the successive-approximation, or SAR, architecture, and forms part of a data-acquisition system that ultimately delivers binary values to a processor, FPGA, or digital controller. Its parallel interface provides a direct, high-throughput path for transferring each 16-bit conversion result.
The AD976BRS operates from a single 5 V supply and supports analog input signals extending to 100 mV, making it suitable for low-level measurement systems. Its internal 2.5 V reference can be used directly or supplemented by an external reference when system-level calibration requires additional flexibility. Maximum power dissipation is 100 mW, which supports compact, low-power data-acquisition designs without requiring a large thermal solution under specified operating conditions.
Internally, the device is a switched-capacitor SAR converter. During conversion, its internal successive-approximation network compares the sampled input against a generated reference and progressively resolves the result to 16-bit resolution. The BiCMOS process combines bipolar circuitry with CMOS logic, supporting the converter's high-speed parallel architecture while retaining low power consumption. The manufacturer also describes factory offset-and-gain adjustment with external 200 ohm and 33.2 kilohm resistors for single-supply calibration.
Typical uses include industrial process measurement, instrumentation, communications, control systems, and signal-analysis equipment where a 100 kSPS sampling rate and parallel output are appropriate. The AD976 is also used in data-acquisition boards and embedded measurement instruments. For designs requiring greater sampling throughput, the related AD976A family provides a 200 kSPS option according to the manufacturer product page.
Designers should preserve the analog input path's low noise and settling behavior because a SAR ADC samples the input at the beginning of each conversion. Place input and reference decoupling capacitors close to their associated pins, use a clean analog ground strategy, and route the 16-bit parallel bus away from switching nodes. Confirm timing against the selected clock and interface implementation before finalizing the PCB layout.
This page combines the manufacturer's AD976 family information with practical interface, calibration, and PCB guidance. It also identifies the important distinction between the AD976BRS 100 kSPS version and the 200 kSPS AD976A family member while keeping replacement recommendations constrained to verified, package-compatible candidates.
드롭인 대체품: AD976BRS — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청AD976BRS 최대 정격 & 전기적 특성
| Converter Type | 16-bit successive-approximation ADC |
| Throughput Rate | 100 kSPS |
| 분해능 | 16 bit |
| 공급 전압 | 5 V |
| Analog Input Range | 0 mV to 100 mV |
| Internal Reference Voltage | 2.5 V |
| Maximum Power Dissipation | 100 mW |
| Input Type | Single-ended analog input |
| Converter Architecture | Switched-capacitor successive approximation |
| Process Technology | BiCMOS |
| Digital Interface | High-speed parallel interface |
| Clock | On-chip clock |
| Reference Configuration | Internal 2.5 V or external reference |
| 패키지 | 28-pin SSOP |
| 실장 유형 | Surface mount |
| Number of Inputs | 1 |
AD976BRS 28-pin ssop 핀 구성 가이드
AD976BRS(28-pin ssop 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: AD976BRS.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
AD976BRS 적합 용도: 6 애플리케이션s: Industrial Process Measurement, Data-Acquisition Instrumentation, Communications Signal Conditioning, Precision Control Systems, Communications Interface Circuits, Power and Process Monitoring.
Industrial Process Measurement
The AD976BRS fits low-level industrial process measurement because it combines 16-bit resolution with a 100 kSPS throughput rate and a 0 mV to 100 mV analog input range. A conditioning amplifier can scale a pressure, temperature, or flow sensor signal into that interval before the converter samples it. The switched-capacitor SAR architecture and parallel output permit rapid transfer of each result to a controller or FPGA. Keep the analog front end close to the converter, use the internal 2.5 V reference where calibration permits, and route the 16-bit bus away from motor-control switching nodes.
추천
Data-Acquisition Instrumentation
The AD976BRS is useful in compact data-acquisition instruments that need 16-bit measurements at up to 100 kSPS without the complexity of a high-speed serial interface. Its internal 2.5 V reference, on-chip clock, single 5 V supply, and parallel output simplify synchronization between the analog acquisition section and digital processing logic. The maximum specified power dissipation of 100 mW also assists thermal design in portable or multi-channel systems. For a higher-throughput redesign, evaluate the 200 kSPS AD976A family while confirming package and timing compatibility.
추천
Communications Signal Conditioning
The AD976BRS can serve as the sampling element in a communications receiver or baseband measurement path when the received analog level is conditioned to the converter's 0 mV to 100 mV input range. The 100 kSPS throughput supports moderate-rate envelope, waveform, or quality measurements while the 16-bit parallel interface enables direct connection to FPGA logic. The internal reference and clock simplify the block definition, but the analog input network still requires controlled impedance, low-noise routing, and careful grounding to preserve the converter's nominal performance.
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Precision Control Systems
For closed-loop control and laboratory control systems, the AD976BRS provides 16-bit conversion resolution at a 100 kSPS sampling rate. The parallel result can be read directly by a digital controller, reducing serial-interface overhead and simplifying deterministic sampling schedules. A 100 mV full-scale input is appropriate for transducer bridges and standardized analog front ends rather than for directly measuring high-voltage signals. Confirm acquisition timing, reference behavior, and input settling in the application circuit, especially when the control loop updates faster than the converter's sampling interval.
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Communications Interface Circuits
The AD976BRS can be evaluated in communications interface circuits that accept a low-level analog waveform and convert it into a 16-bit parallel digital stream. Its single 5 V operation, internal 2.5 V reference, and on-chip clock reduce the number of supporting components in a tightly integrated acquisition card. At 100 kSPS, the device is appropriate for control, monitoring, and lower-rate signal-analysis channels rather than high-bandwidth waveform capture. Use controlled-impedance routing and isolate return currents to prevent digital-interface activity from corrupting the sampled analog signal.
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Power and Process Monitoring
The AD976BRS can monitor low-level process or power-system signals after suitable scaling and isolation. Its 100 mV input range suits conditioned outputs from current, voltage, and bridge sensors, while the 16-bit resolution supports detailed measurements and trend analysis. The internal 2.5 V reference and maximum 100 mW dissipation help simplify compact multi-channel monitoring designs. Provide protection against transients and out-of-range inputs, maintain a stable reference, and use the manufacturer's compensation arrangement when single-supply offset and gain calibration are required.
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추천 제품 요약
엔지니어링 참조 데이터: AD976BRS — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Package | 28-pin SSOP |
| Brand | Analog Devices |
| Resolution | 16 bit |
| Throughput Rate | 100 kSPS |
| Supply Voltage | 5 V |
| Input Range | 0 mV to 100 mV |
| Internal Reference | 2.5 V |
| Power Dissipation | 100 mW maximum |
| Digital Interface | High-speed parallel interface |
| Process Technology | BiCMOS |
주요 차별점
- 100 kSPS operation within the AD976 BiCMOS family (vs AD976A)
- Single 5 V supply with an integrated 2.5 V reference (vs AD9764ARZ)
- Parallel 16-bit output and on-chip clock (vs AD9764ARZ)
설계 노트
Treat the analog input, reference, and digital return paths as separate regions on the PCB. Place input and reference bypass components close to their associated pins, and route the 16-bit parallel output as a short, continuous interface over a stable ground reference. Keep switching nodes and high-current return paths away from the input and reference nodes. The 100 mV input range means that small ground offsets and coupling from adjacent circuitry can materially affect conversion accuracy.
Do not confuse the 5 V supply requirement with the analog input range. AD976BRS accepts signals from 0 mV to 100 mV, so a circuit that applies 5 V directly to the input would exceed that range. Build a suitable attenuator or instrumentation front end, and include protection against transient inputs. Also verify acquisition and clock timing: the 100 kSPS throughput is the conversion-rate figure, not permission to change analog operating conditions independently of timing.
The manufacturer specifies a maximum power dissipation of 100 mW for the AD976 family. Use the official datasheet for the applicable operating conditions and derating rules rather than treating 100 mW as an unrestricted package dissipation limit. Place the converter near adequate ground and supply decoupling, and monitor temperature in enclosed instrumentation. The internal 2.5 V reference and on-chip clock reduce external circuitry, but their reference behavior must still be included in overall power and accuracy analysis.
For single-supply calibration, follow the manufacturer's external 200 ohm and 33.2 kilohm resistor arrangement for the internal offset and gain adjustment. Use the specified resistor network close to the relevant pins, and account for component tolerance and temperature coefficient in the calibration calculation. After implementation, verify offset and gain at the intended input level and temperature rather than assuming factory adjustment alone eliminates all system-level error.
규정 준수 정보
The available manufacturer information does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for AD976BRS. AEC-Q100 qualification is not applicable to the identified industrial converter ordering code.