AD974BN - 4-Channel 16-Bit 200 kSPS ADC | Analog Devices
料号： AD974BN ✗ 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 |
AD974BN 概述
An ADC converts continuously varying analog signals into numeric values for measurement, control, or signal processing. The AD974BN combines four single-ended analog inputs with a common 16-bit conversion engine, making it useful when several sensors or voltage signals must be sampled by a compact system. Its serial interface reduces the number of parallel data lines needed on the PCB and supports communication with a digital controller.
The converter provides 16-bit nominal resolution and 200 kSPS throughput. These figures define the balance between measurement detail and acquisition speed: the device samples up to 200,000 times per second while representing each selected channel with 16-bit digital data. The integrated reference is +2.5 V, and the system operates from a single +5 V supply. A power-down mode is also included for applications that need to reduce consumption when conversion is not required.
The AD974 architecture uses a four-channel input multiplexer and a successive-approximation switched-capacitor conversion process. The input multiplexer selects one of four single-ended analog channels for conversion, while the serial interface transfers conversion results. The integrated 2.5 V reference provides a defined internal reference option, and the datasheet states that the device supports either external or internal reference selection.
Typical applications include industrial process monitoring, sensor signal acquisition, laboratory instrumentation, communications equipment, and embedded measurement systems. The four-channel structure is useful when monitoring multiple voltages sequentially, while the 200 kSPS rate supports measurements where moderate-to-high sampling throughput is needed without requiring a parallel ADC output interface.
When designing around the AD974BN, preserve adequate analog and digital return paths, place input-conditioning components close to the relevant pins, and account for the selected input range when defining signal scaling. The serial interface timing and power-down behavior should be checked against the controller requirements in the Analog Devices AD974 datasheet.
直接替换替代料： AD974BN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
AD974BNZ
✅ 直接替换📋 参考替代料（不在目录中）
AD974ANZ
✅ 直接替换📋 参考替代料（不在目录中）
AD974
✅ 直接替换📋 参考替代料（不在目录中）
AD974BNZ
✅ 直接替换📋 参考替代料（不在目录中）
AD974BN 最大额定值与电气特性
| Product Type | Four-channel data acquisition system with ADC |
| 分辨率 | 16 bit |
| Sampling Throughput | 200 kSPS |
| Analog Input Channels | 4 single-ended channels |
| Input Ranges | 0 V to +4 V, 0 V to +5 V, or ±10 V |
| 电源电压 | +5 V single supply |
| Internal Reference | +2.5 V |
| Reference Selection | External or internal 2.5 V reference |
| Converter Architecture | Successive-approximation switched-capacitor ADC |
| Input Multiplexer | Four-channel analog input multiplexer |
| 接口 | High-speed serial interface |
| Power-Down Mode | Yes |
| Maximum Power Dissipation | 120 mW |
| 封装 | 28-pin PDIP |
| 安装类型 | Through-hole |
AD974BN 28-pin pdip 引脚配置指南
AD974BN（28-pin pdip 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： AD974BN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD974BN 适用于 6 应用s: Industrial Process Monitoring, Sensor Signal Acquisition, Laboratory Instrumentation, Communications Test Equipment, Embedded Data Acquisition, Power and Supply Monitoring.
Industrial Process Monitoring
The AD974BN fits industrial process monitoring because it combines four single-ended analog inputs with a 16-bit, 200 kSPS conversion engine. A controller can select each sensor or process-voltage channel through the multiplexer and acquire sequential measurements through the serial interface. The supported 0 V to +4 V, 0 V to +5 V, and ±10 V ranges allow the same converter family to serve different front-end signal levels. Designers should scale each sensor output into the selected range, provide protection for transient industrial faults, and verify timing against the control system.
推荐
Sensor Signal Acquisition
AD974BN is suitable for acquiring several low-bandwidth sensor outputs in a centralized measurement system. Its four single-ended inputs reduce the number of separate converter packages when pressure, temperature, level, or position signals must be observed in sequence. The 16-bit resolution provides the nominal measurement format, while 200 kSPS throughput supports sampling faster than many slowly changing sensor networks require. A practical design should use buffering, anti-alias filtering, and channel-specific scaling, then verify conversion timing and acquisition latency with the host controller.
推荐
Laboratory Instrumentation
The AD974BN can serve laboratory instrumentation that needs repeatable acquisition of four analog measurement points. A 16-bit ADC format and 200 kSPS maximum throughput allow the instrument to balance numeric resolution with sampling flexibility. The internal +2.5 V reference provides a defined source, while the datasheet also supports external-reference selection for systems that need tighter control of the measurement reference. Calibration should account for analog front-end offset, gain, input-range selection, and the difference between the internal reference and any external reference used in production.
推荐
Communications Test Equipment
AD974BN is appropriate for test systems that monitor several analog control or supply-related signals around communications hardware. The serial interface helps reduce PCB signal count when the converter communicates with a digital controller, and the four-channel multiplexer supports repeated measurements without requiring four separate converter packages. The 200 kSPS throughput can provide adequate margin for many supervisory and diagnostic measurements, although it is not a substitute for waveform capture with much higher bandwidth requirements. Input conditioning should preserve signal integrity and prevent out-of-range transients from reaching the converter.
推荐
Embedded Data Acquisition
The AD974BN works well in embedded acquisition systems requiring several analog measurements and a compact serial connection. Its single +5 V supply simplifies system power planning, while the internal 2.5 V reference and selectable reference source provide flexibility in embedded designs. The 16-bit conversion format can be useful when the system must preserve measurement detail from sensors or potentiometric positions. Firmware should handle channel selection, conversion status, reference configuration, and power-down sequencing according to the interface timing defined by the manufacturer.
推荐
Power and Supply Monitoring
AD974BN can monitor several voltage-related points in a power subsystem when those signals are conditioned into one of its supported input ranges. Four single-ended channels allow sequential measurement of rails, dividers, or control signals, while 200 kSPS throughput supports relatively rapid supervisory updates. The converter is not a replacement for a dedicated high-resolution power monitor when accuracy, isolation, or fault-response requirements exceed the AD974BN application envelope. Add resistor-divider attenuation, input filtering, and protection before connecting power rails.
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推荐产品汇总
工程参考数据： AD974BN ——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 | AD974BNZ | AD974ANZ | AD974ARZ | AD974 |
|---|---|---|---|---|---|
| Package | 28-pin PDIP | 28-pin PDIP | 28-pin PDIP | SOIC-28 | 28-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
关键差异点
- Four-channel acquisition with a serial interface （对比 AD974ARZ)
- Single +5 V operating supply （对比 AD974ANZ)
- Internal +2.5 V reference with external-reference option （对比 AD974ARZ)
设计说明
Route analog input traces away from digital serial-interface and switching-supply traces. Place input-conditioning components close to the AD974BN pins, and use a continuous ground reference where possible. Because the converter includes a high-speed serial interface, keep clock and data routing short and controlled; otherwise, edge-related crosstalk can reduce the effective margin of the 16-bit conversion system.
Do not treat the four-channel capability as four simultaneous 16-bit converters. The verified architecture uses a four-channel input multiplexer feeding one sampling ADC, so channels are selected sequentially. Firmware and hardware timing must account for channel selection, conversion status, and serial transfer. Also confirm the selected 0 V to +4 V, 0 V to +5 V, or ±10 V input range before applying external signals.
Use a single +5 V supply as specified for the AD974BN and follow the manufacturer’s decoupling recommendations. The verified datasheet information lists maximum power dissipation as 120 mW, but actual board temperature depends on operating activity, package, copper area, and ambient temperature. If the power-down mode is used, verify that the host controller does not assume the converter remains active during a conversion sequence.
合规信息
The verified web data does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for AD974BN.