AD977CR - 16-Bit 100 kSPS Serial ADC | Analog Devices
料号： AD977CR ✗ 停产AD977CR 概述
直接替换替代料： AD977CR ——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： AD977CR （相同外形与封装尺寸） ——差异在于 Supply Voltage, Throughput Rate.
AD977CR 最大额定值与电气特性
| Converter Type | Successive-approximation ADC |
| 分辨率 | 16 bit |
| Throughput Rate | 100 kSPS |
| 电源电压 | 5 V |
| Power Dissipation | 100 mW maximum |
| Input Voltage Range, Unipolar | 0 V to 5 V or 0 V to 4 V |
| Input Voltage Range, Bipolar | +/-5 V or +/-3.3 V |
| Output Interface | Serial |
| 封装 | 20-pin SOIC |
| Package Material | Ceramic |
| Packaging | Tube |
| Power-Down Mode | Available |
| 安装类型 | Surface mount |
| Analog Input Type | Single-ended or differential, selectable through external circuitry |
AD977CR ceramic 引脚配置指南
AD977CR（ceramic 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： AD977CR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD977CR 适用于 6 应用s: Industrial Process Data Acquisition, Precision Instrumentation, Communications Signal Monitoring, Audio and Vibration Analysis, Embedded Control and Monitoring, Power and Energy Monitoring.
Industrial Process Data Acquisition
The AD977CR fits industrial process-measurement systems that require 16-bit conversion at up to 100 kSPS from a single 5 V supply. Its supported unipolar 0–5 V and 0–4 V input ranges can be used with conditioned pressure, temperature, and position sensors, while bipolar ±5 V or ±3.3 V configurations support bipolar sensor outputs. The converter provides one sample every 10 microseconds at its stated throughput. Its 100 mW maximum power dissipation and power-down mode also help manage thermal demand in compact acquisition hardware. The application requires careful reference and input-network layout, plus confirmation of the exact operating-temperature grade before deployment.
推荐
Precision Instrumentation
The AD977CR is appropriate for precision laboratory and test instruments where 16-bit resolution is useful but 100 kSPS is sufficient for the measurement bandwidth. A single 5 V supply simplifies system power planning, and the available 0–4 V unipolar range can accommodate suitable front-end outputs without bipolar conversion circuitry. At 100,000 samples per second, the converter can represent waveforms or rapidly acquired measurement sequences while keeping power dissipation at or below the stated 100 mW maximum. Designers should place the input network, reference, and converter on a clean analog section of the PCB, and verify accuracy-related specifications such as SNR and integral nonlinearity in the manufacturer datasheet.
推荐
Communications Signal Monitoring
The AD977CR can be used in communications monitoring equipment when the required signal bandwidth is compatible with a 100 kSPS sampling rate. Its 16-bit resolution preserves fine amplitude detail in received or baseband signal measurements, while the 5 V supply and serial interface suit compact embedded acquisition cards. The 0–5 V unipolar range supports many standardized analog monitoring outputs, and the ±3.3 V bipolar option can serve suitable centered signals. Engineers must ensure aliasing is controlled before the ADC input and must keep switching-node and communication-interface returns separated from the sensitive analog path. The AD977CR is better suited to monitoring than to high-bandwidth communications waveform capture.
推荐
Audio and Vibration Analysis
The AD977CR is suitable for selected audio, vibration, and condition-monitoring channels where a 100 kSPS ceiling is acceptable. Its 16-bit resolution provides substantially more amplitude detail than lower-resolution general-purpose converters, while the single 5 V operation simplifies portable or embedded test equipment. For a 10 kHz input bandwidth, the 100 kSPS rate provides a basic factor-of-10 oversampling margin before considering the filter and antialiasing requirements. The selected input network must preserve signal integrity and reject out-of-band energy, while power-down mode can reduce consumption during inactive intervals. Engineers should verify noise, distortion, and frequency-response specifications directly from the family datasheet.
推荐
Embedded Control and Monitoring
The AD977CR can serve as an analog front end in embedded control systems that monitor slow or medium-bandwidth sensor channels. Its 100 kSPS rate offers more temporal resolution than required by many temperature, level, and actuator-feedback systems, while 16-bit resolution improves representation of small sensor changes. The 5 V supply operation and 100 mW maximum dissipation allow integration into compact control electronics, provided the board has adequate thermal margin. A practical design can use power-down mode during idle intervals and external circuitry for input-range translation. Firmware and system timing must account for the serial conversion process, and the ADC's exact acquisition timing should be checked in the manufacturer documentation.
推荐
Power and Energy Monitoring
The AD977CR can be used in power-monitoring equipment that samples scaled voltage or current signals with 16-bit resolution and 100 kSPS throughput. Its unipolar 0–5 V and 0–4 V ranges are compatible with appropriately conditioned outputs from current transformers, dividers, or analog front ends. The sampling interval of 10 microseconds provides a practical basis for calculating RMS, peak, and power calculations in the downstream controller. The converter's 100 mW maximum dissipation is suitable for compact monitoring modules, although accuracy depends on the external gain and reference network. PCB layout should minimize ground drops across the analog input path and keep high-current switching loops physically separate from the converter and its reference.
推荐
推荐产品汇总
工程参考数据： AD977CR ——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 | AD977AR |
|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC |
| Brand | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit |
| Throughput Rate | 100 kSPS | 100 kSPS |
| Supply Voltage | 5 V | 5 V |
| Output Interface | Serial | Serial |
关键差异点
- Uses the 100 kSPS AD977 performance level （对比 AD977A family)
- Provides 16-bit conversion from a single 5 V supply （对比 AD976BRZ)
- Offers four documented input-range choices （对比 AD677KRZ)
设计说明
Keep the AD977CR input network, reference connection, and analog return path close to the converter while separating them from digital clock and serial-data routing. Use the manufacturer reference and input-range circuit as the layout baseline because component values and topology are not present in the supplied data. A single 5 V supply may require local bypass capacitors and a low-impedance return plane to prevent supply ripple from appearing as conversion error.
The 100 kSPS conversion rate must be treated together with the front-end bandwidth rather than as a substitute for an anti-aliasing filter. Confirm the required input bandwidth, settle time, and acquisition behavior in the AD977 family datasheet before selecting the filter. Route the serial output away from the analog input and reference nodes, use a continuous ground reference under the device, and verify timing margins for the connected controller or programmable logic.
The verified maximum power dissipation is 100 mW, but actual system heat depends on supply voltage, conversion activity, and the selected operating mode. Provide a stable 5 V rail and use power-down mode when continuous conversion is unnecessary. Do not calculate analog headroom or external-component values without the exact input-range circuit from the manufacturer datasheet, since the verified excerpts do not provide the required resistor values or reference level.
Do not assume that AD977BRZ, AD977ABRZ, AD976BRZ, or AD677KRZ is a drop-in replacement merely because a comparison page lists 20 pins. Verify package dimensions, pin names, exposed connections, supply requirements, input ranges, conversion timing, and temperature grade against the manufacturer documents. The verified search results do not establish enough information to claim those parts are pin-to-pin compatible with the AD977CR.
合规信息
The supplied verified data does not explicitly state compliance for the AD977CR. A separate comparison listing mentions RoHS and REACH information for AD977ABRZ, but that statement is not transferred to the AD977CR.