AD976AR - 16-Bit 100 kSPS SAR ADC | Analog Devices
料号： AD976AR ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
AD976AR 概述
An ADC is an analog-to-digital converter, a semiconductor that transforms a continuous analog voltage into a numeric code. The AD976AR belongs to the successive-approximation, or SAR, ADC family. Unlike a pipeline ADC, a SAR ADC compares the sampled input against successive trial thresholds during a sequence of conversion cycles. Its sampled input, bit resolution, throughput, reference method, and parallel interface determine the balance between measurement speed, signal detail, circuit complexity, and downstream data handling.
The AD976 family combines several conversion functions in one device. Its 16-bit resolution provides 65,536 possible code levels, while the AD976 version in this MPN operates at 100 kSPS. The AD976A family member reaches 200 kSPS, but it is not an interchangeable speed upgrade unless its complete pinout, timing, reference, and interface requirements are independently verified. Operation from a single 5 V supply simplifies system power planning, while internal or external reference choices support different accuracy and calibration strategies.
The converter uses a switched-capperitor SAR architecture implemented with Analog Devices BiCMOS technology, combining bipolar and CMOS devices. Its internal 2.5 V reference can provide a self-contained conversion solution, while the external-reference option permits board-level reference selection. The high-speed parallel interface presents converted codes directly across digital output pins, making it suitable for logic devices, DSPs, microprocessors, or data latches capable of capturing the required output timing.
Typical uses include closed-loop industrial process monitoring, low-frequency sensor digitization, laboratory measurement equipment, communications receivers, and embedded control systems. The 100 kSPS rate is appropriate for signals that do not require video-bandwidth conversion, while the 16-bit code width can preserve fine amplitude detail. Designers should verify input range, acquisition time, digital timing, output coding, reference requirements, and electrical limits against the manufacturer documentation before fixing the system architecture.
A key design consideration is the relationship between sampling, acquisition, conversion, and output timing. The system must provide a stable input during the sample-and-hold interval and capture the parallel output according to the converter timing. The selected reference must satisfy the required accuracy, noise, temperature, and startup behavior, while external decoupling and grounding should follow the datasheet recommendations.
This product record combines the verified manufacturer and distributor details with application guidance, design cautions, and a transparent distinction between verified specifications and unavailable data. It is intended to support initial engineering selection while avoiding unsupported assumptions about parameters, compliance, lifecycle guarantees, or replacement parts.
直接替换替代料： AD976AR ——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： AD976AR （相同外形与封装尺寸） ——差异在于 Architecture, Internal Reference, Mounting Type, Number of Inputs, Package.
快速对比工具——选择替代料号进行并排对比：
AD976ABN
✅ 直接替换✓ 有现货
$15.5 / 个
查看数据手册 →AD976ARZ
✅ 直接替换📋 参考替代料（不在目录中）
AD976ARZRL
✅ 直接替换📋 参考替代料（不在目录中）
AD976AR-REEL
✅ 直接替换📋 参考替代料（不在目录中）
AD976AR 最大额定值与电气特性
| 分辨率 | 16 bit |
| Throughput Rate | 100 kSPS |
| Architecture | Successive-approximation switched-capacitor ADC |
| Input Type | Single-ended |
| Number of Inputs | 1 input |
| 电源电压 | 5 V single supply |
| Internal Reference | 2.5 V |
| Reference Selection | External or internal |
| Data Interface | High-speed parallel |
| On-Chip Clock | Yes |
| Process Technology | BiCMOS |
| 封装 | 28-lead SOIC |
| 安装类型 | Surface mount |
AD976AR 28-lead soic 引脚配置指南
AD976AR（28-lead soic 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： AD976AR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD976AR 适用于 6 应用s: Industrial Process Monitoring, Instrumentation and Test Systems, Communications Receiver Front End, Sensor Signal Digitization, Embedded Data Acquisition, Audio and Vibration Measurement.
Industrial Process Monitoring
The AD976AR fits industrial process-monitoring designs that require 16-bit code resolution and a 100 kSPS conversion rate for relatively slow sensor or control signals. Place it at the output of an analog front end that performs excitation, filtering, gain, and level shifting before conversion. The single 5 V supply simplifies system integration, while the parallel interface requires a controller or capture register with compatible timing. Verify the unavailable input range and acquisition-time limits before assigning the full signal range to the converter.
推荐
Instrumentation and Test Systems
The AD976AR is appropriate for laboratory and industrial instrumentation when a measurement channel needs a 16-bit digitized result without video-rate conversion. The converter can follow a calibrated analog front end and feed a digital controller, DSP, or display pipeline through its parallel output. The 100 kSPS rate supports sampled measurements, but system accuracy depends on reference quality, analog noise, grounding, sampling settling, and firmware handling of the 16-bit code. Confirm all timing and electrical limits from the manufacturer datasheet.
推荐
Communications Receiver Front End
AD976AR can serve as the ADC in a communications receiver or demodulation path when the supported signal bandwidth is below the 100 kSPS capability. A receiver front end should provide gain, anti-alias filtering, and level translation before the analog input. The parallel data output can be connected to digital logic when the timing and output coding are matched, while the single 5 V rail simplifies integration with adjacent digital and analog circuitry. The input range, dynamic performance, and clock behavior must be verified before release.
推荐
Sensor Signal Digitization
The 16-bit AD976AR is useful for digitizing conditioned outputs from pressure, temperature, position, and other sensors when the measurement bandwidth is well below 100 kSPS. The analog sensor signal should first pass through excitation, filtering, instrumentation amplification, and protection stages so that the ADC sees a stable, in-range waveform. Its internal or external 2.5 V reference options can support calibration strategies, but reference noise and drift must be included in the system error budget. The exact input range and conversion timing remain datasheet-dependent.
推荐
Embedded Data Acquisition
AD976AR can be used in an embedded acquisition subsystem when the system needs more code resolution than a low-resolution ADC and can capture a parallel 16-bit bus. The converter should be paired with a microcontroller, FPGA, or DSP that controls conversion timing and captures the output word without bus contention. Because the interface is parallel, routing density, grounding, and output timing must be checked during PCB planning. The verified 5 V supply and 100 kSPS rate support a straightforward mixed-signal partition when all timing and signal-integrity details are confirmed.
推荐
Audio and Vibration Measurement
AD976AR may be evaluated for audio-control, vibration, or other low-bandwidth measurement channels when the required bandwidth is compatible with 100 kSPS. The analog path should include anti-alias filtering and enough settling time to preserve the 16-bit conversion result, while the digital side must de-embed the parallel bus timing. The converter's internal reference can simplify standalone acquisition, although low-level audio and vibration signals may require careful grounding and reference-noise control. Verify input limits, noise, and timing before claiming audio-grade performance.
推荐
推荐产品汇总
工程参考数据： AD976AR ——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 | AD976 | AD976ARZ | AD976ARZRL | AD976AR-REEL | AD976A |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-lead SOIC | 28-lead SOIC family package | 28-lead SOIC family package | 28-lead SOIC family package | 28-lead SOIC family package | 28-lead SOIC family package |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Throughput | 100 kSPS | 100 kSPS family rating | 100 kSPS family rating | 100 kSPS family rating | 100 kSPS family rating | 200 kSPS |
关键差异点
- AD976AR is identified at 100 kSPS rather than the related AD976A's 200 kSPS （对比 AD976A)
- AD976AR retains a verified single-ended, one-input converter configuration （对比 AD976)
- AD976AR uses a 5 V single supply and a 2.5 V internal reference （对比 AD976ARZ)
设计说明
Treat the 16-bit parallel bus as a timing-sensitive digital interface. Route the output lines together where practical, provide a solid ground reference beneath the bus, and verify that the receiving device meets the converter's output timing. Because the supplied data does not include exact output delay or setup/hold values, use the current manufacturer datasheet before setting trace lengths or adding timing assumptions.
Build the 5 V rail with local decoupling close to the converter and keep analog and digital return currents separated as far as the package and board stackup allow. The exact capacitor values and maximum power dissipation are not included in the supplied verified data, so do not invent them. Start from the manufacturer reference circuit and validate supply noise, startup, and settling in the assembled board.
Do not substitute AD976A for AD976AR based only on the AD976 family relationship. AD976A is verified at 200 kSPS versus 100 kSPS for AD976AR, and the supplied data does not establish exact pin, timing, or lifecycle equivalence. Likewise, do not treat every AD976 ordering suffix as automatically interchangeable; confirm the exact manufacturer ordering code and package documentation before release.
合规信息
The supplied verified web data does not provide a complete compliance statement for AD976AR. Do not infer RoHS, REACH, lead-free, halogen-free, or conflict-mineral status from the distributor listing. The verified product information describes a mixed-signal ADC and does not identify automotive qualification.
