AD976CRZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
料号： AD976CRZ ✓ 量产中AD976CRZ 概述
An ADC is an interface IC that converts a continuously varying analog voltage into a digital code. Within the broader semiconductor hierarchy, the AD976 is a data-conversion IC within the ADC/DAC category. Its 16-bit resolution provides 65,536 possible digital codes, while the 100 kSPS throughput supports applications that require accurate conversion without the conversion time associated with lower-rate general-purpose data converters.
Key features of the AD976CRZ include 16-bit resolution, a 100 kSPS maximum throughput rate, single-supply 5 V operation, an internal 2.5 V reference, and a parallel output interface. The architecture supports acquisition systems, communications equipment, instrumentation, and industrial control applications where the sampled analog signal must be presented to downstream logic or a digital processor.
Internally, the AD976 uses a switched-capacitor successive-approximation ADC. The sampling network captures the analog input before the conversion process compares successive bit decisions. The manufacturer documentation identifies an internal 2.5 V reference and describes external 200 ohm and 33.2 kilohm resistors that provide offset and gain compensation for the single-supply configuration. These compensation components are functional parts of accurate system implementation rather than optional signal-conditioning accessories.
Typical uses include communications receivers, data-acquisition modules, industrial measurement systems, digital audio and control equipment, and embedded processing platforms. The parallel interface can reduce output multiplexing complexity compared with serial converters when the receiving system can provide enough digital input connections and acquire the converted code at the supported rate.
Circuit implementation requires careful attention to analog signal conditioning, reference behavior, digital timing, and the ADC supply. Input and output transitions should be controlled so that switching activity does not degrade conversion accuracy, while the manufacturer's compensation values and recommended layouts should be followed exactly. The AD976CRZ is also offered in related AD976 and AD976A families, but the AD976A doubles the stated throughput to 200 kSPS and should not be treated as an automatic drop-in replacement.
This product page combines verified manufacturer and distributor data, package information, pricing context, application guidance, and engineering selection notes. It also distinguishes the AD976's 100 kSPS rating from the faster AD976A, helping engineers identify whether a related converter changes system timing or requires additional validation.
直接替换替代料： AD976CRZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料AD976CRZ 最大额定值与电气特性
| Converter Type | Successive-approximation ADC |
| Architecture | Switched-capacitor |
| 分辨率 | 16 bit |
| Input Channels | 1 channel |
| Throughput Rate | 100 kSPS |
| 电源电压 | 5 V single supply |
| Internal Reference | 2.5 V |
| Output Interface | High-speed parallel |
| 封装 | 28-pin SOIC |
| Package Code | 28-SOIC |
| Temperature Grade | Industrial |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Number of Terminals | 28 |
| Offset Compensation Resistor | 200 ohm |
| Gain Compensation Resistor | 33.2 kohm |
AD976CRZ rectangular 引脚配置指南
AD976CRZ（rectangular 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： AD976CRZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD976CRZ 适用于 6 应用s: Communications Receiver, Industrial Data Acquisition, Instrumentation Signal Capture, Digital Audio Measurement, Process Control Monitoring, Digital Control System Front End.
Communications Receiver
The AD976CRZ fits communications receivers that require a 16-bit conversion result and 100 kSPS throughput without the complexity of a higher-speed converter family. Its switched-capacitor successive-approximation architecture, single 5 V supply, internal 2.5 V reference, and parallel output interface provide a straightforward signal-chain endpoint. The receiver can condition the incoming analog signal, apply the manufacturer's 200 ohm and 33.2 kilohm compensation network, and capture the resulting code in parallel logic. Compared with the 200 kSPS AD976A, the AD976CRZ reduces processing demand when the communications link does not require the higher sampling rate. System validation should confirm analog bandwidth, code timing, and the exact 28-pin SOIC footprint before production use.
推荐
Industrial Data Acquisition
The AD976CRZ is suitable for industrial measurement systems requiring 16-bit numerical resolution at a 100 kSPS sampling rate. A sensor or transducer signal can pass through suitable analog conditioning before entering the switched-capacitor ADC, whose 2.5 V internal reference and single 5 V operation help simplify the power architecture. The parallel output can feed a latch, FPGA, or microcontroller input bank without requiring a serial-output protocol. Because industrial environments may introduce noise and ground-potential differences, designers should preserve the manufacturer's offset and gain compensation values and validate the analog layout against the reference circuit. The AD976 family is appropriate when 100 kSPS is sufficient and the AD976A's additional throughput is unnecessary.
推荐
Instrumentation Signal Capture
The AD976CRZ can serve as the conversion stage in instrumentation that captures moderately sampled analog measurements. Its 16-bit resolution represents the input across 65,536 codes, while the 100 kSPS rate supports acquisition workflows that do not require the AD976A's 200 kSPS throughput. The internal 2.5 V reference provides a defined conversion basis, and the parallel output permits direct acquisition by digital control logic. For instrumentation accuracy, the analog front end should provide suitable input drive and bandwidth, while the 200 ohm and 33.2 kilohm offset and gain compensation components must follow the manufacturer guidance. Engineers should also account for settling time between conversions and ensure the downstream timing agrees with the parallel output sequence.
推荐
Digital Audio Measurement
The AD976CRZ can be used in audio measurement equipment where a 16-bit converter operating at 100 kSPS provides adequate resolution for selected analysis and control tasks. The single 5 V supply and internal 2.5 V reference simplify system partitioning, while the high-speed parallel interface supports direct transfer of each conversion result to digital logic. Designers should place suitable anti-alias filtering ahead of the converter and follow the manufacturer's offset and gain compensation network to support single-supply calibration. The related AD976A may be selected when twice the sampling rate is necessary, but its 200 kSPS throughput changes the interface timing and must be validated rather than treated as an automatic substitution. Digital clocking and analog grounding remain central to repeatable measurements.
推荐
Process Control Monitoring
The AD976CRZ is appropriate for process-control monitoring loops that sample slowly changing or moderately varying analog process signals at up to 100 kSPS. Its 16-bit quantization provides 65,536 possible codes, and its switched-capacitor SAR architecture can produce useful conversions for control and supervisory measurements. The converter's 5 V supply, 2.5 V internal reference, and parallel output simplify integration with controller input logic. A practical implementation must include sensor conditioning, protection appropriate to the industrial environment, and filtering that limits out-of-band energy before conversion. The manufacturer compensation resistors should not be substituted casually because they support offset and gain adjustment with a single supply. The AD976A is preferable only when the control or monitoring architecture genuinely benefits from 200 kSPS operation.
推荐
Digital Control System Front End
The AD976CRZ can serve as the analog-to-digital front end of a digital control system requiring a deterministic parallel conversion interface. Its 100 kSPS throughput and 16-bit resolution provide 65,536 numerical levels for command monitoring, feedback capture, or supervisory control. The internal 2.5 V reference and single 5 V operating arrangement reduce external supply complexity, while the 28-pin SOIC package supports conventional board assembly. The receiving logic must be synchronized to the converter's data-valid behavior and must not introduce timing uncertainty during acquisition. Signal conditioning should preserve the converter's analog input requirements, and the documented 200 ohm and 33.2 kilohm compensation network should be retained. If a faster related model is considered, timing must be revalidated around the doubled throughput.
推荐
推荐产品汇总
工程参考数据： AD976CRZ ——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 |
| Converter Type | Successive-approximation ADC |
| Architecture | Switched-capacitor |
| Throughput Rate | 100 kSPS |
| Supply Voltage | 5 V single supply |
| Internal Reference | 2.5 V |
| Output Interface | High-speed parallel |
| Input Channels | 1 channel |
关键差异点
- Matches the original AD976 family's 100 kSPS conversion rate （对比 AD976ARZ)
- Uses the established switched-capacitor 16-bit ADC architecture （对比 AD976CR)
- Simplifies system power design with one 5 V supply （对比 AD976ARZ)
设计说明
Use the manufacturer compensation network rather than treating it as optional signal conditioning. The Analog Devices AD976/AD976A datasheet identifies a 200 ohm resistor and a 33.2 kilohm resistor for offset and gain compensation with single-supply operation. Preserve the specified values, tolerance, and placement around the relevant device pins. Omitting or relocating these components can change gain and offset accuracy even though the converter continues to produce valid-looking digital codes.
Separate analog input routing from digital output and clock-return paths as far as the package and board constraints allow. Keep the input trace short, provide a stable return path, and place input conditioning and compensation components close to the converter. Digital output and clock traces should be routed away from the analog input node to reduce switching-edge coupling. Follow the manufacturer reference layout for final decoupling and compensation placement rather than relying only on a generic analog-versus-digital partition.
Design the receiver around the AD976's 100 kSPS throughput and verify acquisition timing rather than assuming that a related 200 kSPS converter is interchangeable. The AD976A provides twice the sampling rate of AD976CRZ, a 100% increase that falls outside a drop-in tolerance. Evaluate output timing, downstream capture logic, settling requirements, and system bandwidth whenever moving to the faster family. This is especially important where the receiving device must capture all 16 parallel data bits consistently.
合规信息
The supplied manufacturer and distributor data does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status for AD976CRZ. AEC-Q100 is marked not applicable because the listed part is an industrial-grade ADC rather than an identified automotive-qualified variant.