AD976BRZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
料号： AD976BRZ ✓ 量产中AD976BRZ 概述
An ADC is a data-acquisition interface that converts a continuously varying analog voltage into a numeric value for processing, storage, or transmission. The AD976 belongs to the successive-approximation ADC hierarchy within mixed-signal semiconductors. It uses a switched-capacitor internal architecture, an internal 2.5 V reference, and a high-speed parallel digital interface to provide deterministic conversion results in instrumentation and signal-processing systems.
Key features include 16-bit resolution, a 100 kSPS throughput rate, single-ended analog input, a 5 V analog supply, and parallel data output. The internal reference reduces the number of external precision components required for basic converter operation. The manufacturer datasheet also describes external offset and gain calibration using 200 ohm and 33.2 kilohm resistors, allowing system-level calibration when operating from a single supply.
The AD976 uses a successive-approximation, switched-capper architecture implemented with Analog Devices proprietary BiCMOS technology. The BiCMOS process combines high-performance bipolar devices with CMOS transistors, supporting the internal reference, sampling network, and parallel interface. The AD976A family shares this architecture but offers a 200 kSPS throughput rate, so it is not a parameter-equivalent drop-in choice for a design specifically requiring the 100 kSPS AD976.
Typical uses include industrial measurement, instrumentation, signal acquisition, data logging, and embedded control systems that accept single-ended analog inputs. It is especially relevant where a 16-bit conversion result, parallel data bus, and moderate sampling rate are more useful than the maximum throughput of a high-speed flash or pipeline converter.
Designers should use a suitable acquisition, reference, and decoupling network around the converter and account for analog input settling time before sampling. Because the AD976BRZ uses a 28-pin SOIC package, its footprint is relatively large compared with modern fine-pitch mixed-signal packages. The verified source set does not expose the complete pin names, so this page does not reproduce an unverified pin assignment.
This page combines verified manufacturer specifications, distributor availability, application guidance, and procurement information. It also distinguishes the 100 kSPS AD976BRZ from the faster AD976A, preventing a speed-related substitution from being presented as a true drop-in replacement.
直接替换替代料： AD976BRZ ——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： AD976BRZ （相同外形与封装尺寸） ——差异在于 Architecture, Input Range, Package, Process Technology, Resolution.
该产品暂无直接替换替代料。
请求替代料AD976BRZ 最大额定值与电气特性
| ADC Resolution | 16 bit |
| 采样率 | 100 kSPS |
| Analog Input Type | Single-ended |
| Input Channel Count | 1 channel |
| Conversion Architecture | Successive approximation, switched capacitor |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Nominal Supply Voltage | 5 V |
| Digital Interface | High-speed parallel |
| Internal Reference Voltage | 2.5 V |
| Maximum Power Dissipation | 100 mW |
| 封装 | 28-pin SOIC |
| Terminal Count | 28 terminals |
| Temperature Grade | Industrial |
| Process Technology | Proprietary BiCMOS |
AD976BRZ 28-pin soic 引脚配置指南
AD976BRZ（28-pin 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： AD976BRZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD976BRZ 适用于 6 应用s: Industrial Process Measurement, Signal Acquisition and Data Logging, Embedded Control Systems, Laboratory Instrumentation, Audio Measurement and Monitoring, Automated Test Equipment.
Industrial Process Measurement
The AD976BRZ fits industrial process measurement when a sensor signal must be digitized at moderate speed with 16-bit nominal resolution. Its single-ended input, 100 kSPS throughput, and 4.75 V to 5.25 V analog supply range allow it to acquire controlled analog signals from monitoring equipment. Place the converter behind an input-conditioning stage that limits bandwidth, provides the required full-scale range, and drives the single-ended input with low settling error. The 100 kSPS rate captures process variables without the timing and power demands of a high-speed flash ADC. Because the verified data does not establish the exact input range or temperature limits, the designer should confirm those values in the Analog Devices manufacturer datasheet before defining calibration limits or production operating conditions.
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Signal Acquisition and Data Logging
The AD976BRZ is appropriate for signal-acquisition systems that require accurate numeric conversion before logging or forwarding sampled data. A 16-bit converter with a 100 kSPS sampling rate can support waveform, position, or slowly changing process signals when the analog front end provides adequate conditioning. Its parallel interface permits direct connection to digital acquisition logic without a serial-output timing chain. Place the ADC close to the source circuitry and keep the analog trace short to reduce susceptibility to noise pickup. The internal 2.5 V reference simplifies the basic design, although calibration resistors and software offset-and-gain correction may be required for production accuracy. Verify input settling, acquisition time, and output timing from the manufacturer datasheet.
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Embedded Control Systems
The AD976BRZ can serve as the analog measurement front end in an embedded controller that monitors one continuously sampled input. Its 100 kSPS rate provides more frequent updates than a slow sensor system generally requires, while the 16-bit word size preserves fine numerical detail. A switched-capacitor successive-approximation converter offers a conventional acquisition-and-conversion cycle suitable for periodic polling. Use the parallel outputs to feed a processor or capture register, and coordinate the sample command with the converter timing diagram. The verified industrial-grade classification supports industrial equipment use, but exact temperature limits, logic levels, and acquisition timing remain to be confirmed from the official AD976/AD976A manufacturer datasheet.
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Laboratory Instrumentation
The AD976BRZ is useful in laboratory measurement equipment where a single analog channel must be converted into a 16-bit digital value for display, analysis, or control. The 100 kSPS throughput is adequate for many sensor and instrumentation signals that do not require high-frequency waveform capture. Its parallel interface allows the instrument processor to receive the complete conversion result efficiently, while the internal 2.5 V reference supports a simpler analog subsystem. Calibration should account for the offset and gain adjustment network described in the Analog Devices manufacturer datasheet. Confirm noise, linearity, and full-scale input specifications against the official document because those values were not included in the supplied distributor excerpts.
推荐
Audio Measurement and Monitoring
The AD976BRZ can be evaluated for controlled audio monitoring or measurement systems where a single-ended analog waveform must be converted for digital analysis. Its 16-bit resolution is appropriate for many measurement-grade audio tasks, while the 100 kSPS rate covers lower-bandwidth monitoring signals rather than high-frequency full-rate audio. The high-speed parallel interface supports efficient transfer of each conversion result to digital processing. A practical design should include input protection, anti-alias filtering, and a stable 5 V supply. The internal reference and documented calibration resistors can simplify initial bring-up, but measured system noise and distortion must be assessed rather than inferred from nominal resolution alone. Consult the manufacturer datasheet for the verified input range and timing.
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Automated Test Equipment
The AD976BRZ can serve as a measurement converter in automated test equipment that evaluates one analog parameter during a production or diagnostic cycle. The 100 kSPS throughput provides sufficient sampling for many slow-response sensors and test nodes, and the 16-bit result format offers more resolution than an 8-bit or 12-bit system. Use the parallel output bus to connect to a capture register, FPGA, or processor, and include calibration coefficients for offset and gain correction. Because the converter has a single-ended input, the test fixture needs an appropriate driver rather than a direct differential-source connection. The verified data identifies industrial-grade construction and a 28-pin SOIC package, but complete timing, accuracy, and temperature details should be taken directly from the Analog Devices manufacturer datasheet.
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推荐产品汇总
工程参考数据： AD976BRZ ——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 |
|---|---|
| Package | 28-pin SOIC |
| Brand | Analog Devices |
| Resolution | 16 bit |
| Sampling Rate | 100 kSPS |
| Input Channel Count | 1 channel |
| Input Type | Single-ended |
| Analog Supply Range | 4.75 V to 5.25 V |
| Internal Reference | 2.5 V |
| Digital Interface | High-speed parallel |
| Maximum Power Dissipation | 100 mW |
关键差异点
- Precisely specified 100 kSPS conversion rate （对比 AD976ARZ)
- Single 5 V operation with integrated reference （对比 AD976ARZ)
- Parallel output supports direct digital acquisition （对比 AD976ARZ)
设计说明
Do not substitute the 200 kSPS AD976A for the 100 kSPS AD976BRZ without redesigning and validating the acquisition timing. Although both converters are related ADI family members, the doubled throughput changes the conversion interval, output timing, clocking expectations, and potentially the surrounding analog-network bandwidth. Treat the AD976A as a functionally related alternative rather than a verified drop-in replacement.
Use the manufacturer's AD976/AD976A typical application guidance when laying out the analog input, reference, and digital interface. Keep the analog input path short, place input and reference decoupling close to their associated pins, and provide a quiet return path for the converter. The verified excerpts do not include the full pinout, so confirm every connection against the official pin diagram before fabrication rather than relying on a generic SOIC-28 footprint.
Account for the switched-capacitor input network and acquisition timing when calculating the maximum input bandwidth. Source impedance, the external 200 ohm and 33.2 kilohm calibration resistors, and the driven input voltage all affect settling. If the application needs high-frequency content, use an appropriate anti-alias filter and verify the complete sampling path against the manufacturer's acquisition-time and dynamic-performance specifications.
合规信息
The verified excerpts identify industrial-grade construction and the AD976/AD976A family, but they do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because the AD976BRZ is an industrial ADC rather than an automotive-qualified device.