AD976ARS - 16-Bit 200 kSPS ADC | Analog Devices
料号： AD976ARS ✗ 停产AD976ARS 概述
An ADC is a data-acquisition component that converts an analog voltage into a digital code. A successive-approximation ADC compares the input voltage with an internally generated reference through a sequence of trial conversions, then presents the final binary result through its digital interface. AD976/AD976A devices occupy the ADC position in a signal-chain hierarchy of sensor, signal-conditioning, ADC, digital processing, and system interface.
The AD976A family provides a 200 kSPS conversion rate, while the closely related AD976 provides 100 kSPS. The AD976ARS is specified for single 5 V operation, factory calibration, and comprehensive DC and AC performance testing. Its internal 2.5 V reference reduces the need for an external reference circuit, while the parallel interface supports direct connection to digital control and processing logic.
Typical uses include industrial process monitoring, instrumentation, communications, data acquisition, medical instrumentation, and embedded control systems. The 16-bit resolution supports a detailed representation of the measured analog signal, while the 200 kSPS rate permits sampling of slower industrial, audio, and control signals. The parallel interface requires adequate PCB routing and grounding discipline, particularly where digital switching activity could affect analog input accuracy.
When designing around the AD976ARS, preserve the separation between analog and digital return paths, place input and reference-decoupling components close to the device, and account for the timing relationship between conversion start and output data. Use the manufacturer datasheet and pin-description table when assigning board traces. This page combines the product-family specifications, sourcing information, and engineering guidance needed to evaluate the AD976ARS in a new design.
直接替换替代料： AD976ARS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD976ARS （相同外形与封装尺寸） ——差异在于 Package, Architecture, Mounting Type, Data Interface, Input Type.
AD976AR
✅ 直接替换联系询价
查看数据手册 →AD976ARZ
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →AD976ARSZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD976ARS 最大额定值与电气特性
| 分辨率 | 16 bit |
| Conversion Throughput | 200 kSPS |
| Architecture | Successive approximation, switched capacitor |
| 电源电压 | 5 V |
| Internal Reference | 2.5 V |
| Input Type | 1 input, single-ended |
| Digital Interface | High-speed parallel |
| Maximum Power Dissipation | 100 mW |
| 封装 | 28-pin SSOP |
| 安装类型 | Surface mount |
| Factory Calibration | Factory calibrated |
| DC and AC Testing | Fully tested for SNR and THD |
AD976ARS 28-pin ssop 引脚配置指南
AD976ARS（28-pin ssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AD976ARS.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD976ARS 适用于 6 应用s: Industrial Process Monitoring, Data Acquisition Systems, Communications Signal Conditioning, Medical Instrumentation, Audio and Vibration Analysis, Embedded Control Instrumentation.
Industrial Process Monitoring
The AD976ARS is appropriate for acquiring slow industrial sensor signals while preserving 16-bit numerical detail. Its 200 kSPS throughput provides margin for multiplexed channels and periodic calibration measurements, while the internal 2.5 V reference simplifies the reference network. Place the converter on the analog side of the acquisition system, return digital current away from the input node, and add input protection and filtering for field-wired sensors.
推荐
Data Acquisition Systems
The 16-bit resolution and 200 kSPS throughput make the AD976ARS useful in compact laboratory and industrial data-acquisition systems. The parallel interface permits direct capture by an FPGA, microcontroller, or logic device without a serial-output protocol. Reliable acquisition depends on defining conversion timing, controlling output bus contention, and keeping the analog input path away from clock and digital return currents.
推荐
Communications Signal Conditioning
The AD976ARS can digitize moderate-bandwidth analog signals in communications monitoring, modulation analysis, and baseband measurement equipment. Its 200 kSPS rate is adequate for many supervisory, envelope, and low-frequency waveform channels, although it is not intended for high-bandwidth radio-frequency sampling. The converter's parallel data interface supports FPGA-based demodulation or filtering, provided analog gain, anti-alias filtering, and grounding are designed together.
推荐
Medical Instrumentation
The AD976ARS can serve as a 16-bit mixed-signal front end in instrumentation that samples low-bandwidth physiological or diagnostic signals. Its 200 kSPS throughput is appropriate for many monitoring channels, while the internal reference helps simplify isolated or space-constrained designs. A medical implementation still requires application-specific signal isolation, patient protection, input-range analysis, calibration, and compliance with the relevant product-safety requirements.
推荐
Audio and Vibration Analysis
The AD976ARS can digitize low- and mid-band audio, vibration, or acoustic-monitoring waveforms where a 16-bit converter and 200 kSPS sampling rate are sufficient. The parallel output is useful when samples must enter a processor quickly for filtering, FFT analysis, or event detection. Designers should add anti-alias filtering, control analog input drive, and compare the resulting signal bandwidth with the converter's specified input and dynamic-performance characteristics.
推荐
Embedded Control Instrumentation
The AD976ARS can provide a high-resolution measurement channel beside a control processor in industrial instruments, test equipment, and embedded test systems. Its 200 kSPS rate supports fast feedback or monitoring while the internal reference reduces external reference complexity. Integration requires a deliberate sampling-clock and data-capture scheme, particularly if the converter's 16 parallel outputs share a bus with other peripherals.
推荐
推荐产品汇总
工程参考数据： AD976ARS ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD976AR | AD976ARZ | AD976ARSZ |
|---|---|---|---|---|
| Package | 28-pin SSOP | 28-pin SSOP | 28-pin SSOP | 28-pin SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Architecture | Successive approximation, switched capacitor | Successive approximation, switched capacitor | Successive approximation, switched capacitor | Successive approximation, switched capacitor |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Digital Interface | High-speed parallel | High-speed parallel | High-speed parallel | High-speed parallel |
关键差异点
- 200 kSPS throughput within the AD976A family （对比 AD976)
- Integrated reference simplifies the converter subsystem （对比 AD976)
- Low specified power dissipation （对比 AD976)
设计说明
Separate the analog input and reference routing from the 16-bit parallel output bus. Place input, reference, and bypass capacitors close to their associated pins, and route digital output traces away from the input node. Maintain a continuous ground reference beneath the converter and use the manufacturer pin table to connect analog and digital ground pins according to the recommended layout.
Treat conversion-clock and data-transition edges as potential noise sources. Keep the sampling clock away from sensitive input and reference traces, use a quiet analog supply path, and avoid adding unnecessary load or branching on the parallel output bus. If the converter drives a FPGA or MCU, confirm voltage compatibility, bus direction, and setup and hold timing in the host-device documentation.
Do not approve an AD976 family substitute solely from the base family name. AD976 and AD976A differ in throughput, and ordering suffixes can change package, lead finish, and temperature grade. Before replacing AD976ARS, compare the exact package drawing, all 28 pin assignments, electrical limits, conversion timing, and ordering information for the candidate part.
Use a stable 5 V supply with local decoupling close to the converter. The manufacturer specifies a maximum family power dissipation of 100 mW, but actual board behavior also depends on conversion frequency, output loading, and supply impedance. Keep supply return current from digital circuitry out of the analog reference path and verify startup and shutdown behavior in the complete acquisition circuit.
合规信息
The available product information does not contain an exact compliance declaration for AD976ARS. Confirm RoHS, REACH, lead-free, halogen-free, and conflict-minerals status for the exact ordering code with the manufacturer.