AD974BR - 4-Channel 16-Bit 200kSPS ADC | Analog Devices
MPN： AD974BR ✓ 啟用中AD974BR 概覽
A data acquisition system combines analog multiplexing, sampling, quantization, conversion, and a digital interface into one integrated device. This integration reduces the number of external components and simplifies synchronization between analog channels. The AD974BR is a low-power ADC/data acquisition IC within the broader semiconductor hierarchy: data acquisition system → analog-to-digital converter → ADC/DAC component. Its internal reference and on-chip clock are particularly useful when a system requires repeatable conversions without relying on separate reference and timing components.
The principal features are a 16-bit conversion resolution, 200 kSPS throughput, four single-ended analog input channels, and a single +5 V supply. The device accommodates several input ranges, including 0 V to +4 V, 0 V to +5 V, and ±10 V. A power-down mode helps reduce consumption when acquisition is not required, while the serial interface supports integration with digital controllers. The manufacturer describes the AD974 as a low-power data acquisition system, and the verified product information identifies a maximum power dissipation of 120 mW.
The AD974 uses a successive-approximation switched-capacitor conversion architecture. This architecture is appropriate for acquisition systems that need deterministic sampling, compact implementation, and direct digital output without a complex high-frequency pipeline. The four-channel multiplexer allows one ADC core to process multiple analog inputs sequentially. The serial interface is useful when the converter is connected to a microcontroller, DSP, programmable controller, or other data-processing device; however, the exact supported clock, framing, and output timing must be confirmed from the manufacturer datasheet before final interface design.
Typical applications include industrial process monitoring, laboratory instrumentation, sensor-interface systems, factory automation, medical instrumentation, and embedded measurement platforms. The four-channel structure is useful when several analog sensors or conditioned signals must be scanned through one converter. The 200 kSPS sampling rate supports applications requiring periodic measurement rather than high-bandwidth waveform capture. The 16-bit format provides fine numerical resolution for control loops and measurement systems, while the single +5 V supply simplifies power architecture.
Designers should confirm the package pinout, analog input configuration, reference selection, clock requirements, and serial-interface timing from the AD974 datasheet. Input conditioning, filtering, grounding, and protection must be selected for the intended voltage range. The SOIC package also requires attention to thermal dissipation and copper routing, particularly when the converter operates continuously at its maximum sampling rate.
This page combines verified Analog Devices product information, distributor listing details, package data, and practical acquisition-system guidance. It distinguishes documented parameters from information that still requires datasheet confirmation, helping engineers evaluate the AD974BR for precision multichannel measurement without relying on unverified specifications.
直接替換替代品，適用於 AD974BR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD974BR （相同外形與佔位） — 差異在於 Package, Supply Voltage, ADC Resolution, Input Multiplexer, Input Range 1.
AD974AR
✅ 直接替換聯絡詢價
查看資料表 →AD974ARZ
✅ 直接替換聯絡詢價
查看資料表 →AD9744ARU
✅ 直接替換📋 參考替代品（不在目錄中）
AD9744ARUZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD974BR 最大額定值與電氣特性
| Product Type | Four-channel data acquisition system with serial interface |
| ADC Resolution | 16 bit |
| Sampling Throughput | 200 kSPS |
| Number of Analog Input Channels | 4 channels |
| Input Type | Single-ended analog input |
| Supported Input Range 1 | 0 V to +4 V |
| Supported Input Range 2 | 0 V to +5 V |
| Supported Input Range 3 | ±10 V |
| 供應電壓 | +5 V single supply |
| Internal Reference | +2.5 V |
| Reference Selection | External or internal reference |
| Clock | On-chip clock |
| Conversion Architecture | Successive-approximation switched-capacitor ADC |
| Digital Interface | High-speed serial interface |
| Power-Down Mode | Supported |
| Maximum Power Dissipation | 120 mW |
| 封裝 | 28-SOIC |
| Package Width | 7.50 mm |
| 安裝類型 | Surface mount |
AD974BR 7.50 mm 腳位配置指南
AD974BR（7.50 mm 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AD974BR.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD974BR 適用於 6 應用s: Industrial Process Monitoring, Laboratory Instrumentation, Sensor Interface Systems, Embedded Control Platforms, Factory Automation Measurement, Medical Measurement Equipment.
Industrial Process Monitoring
AD974BR fits multichannel process monitoring where several conditioned sensors must be scanned by one compact converter. Its four single-ended inputs reduce the number of separate ADC channels, while 16-bit resolution supports precise representation of pressure, temperature, level, and flow signals. The 200 kSPS throughput provides ample periodic-sampling capability for supervisory control loops, provided each source has adequate settling time through the selected input network. The single +5 V supply simplifies system power planning, and the internal +2.5 V reference can support repeatable operation when the application does not require an external precision reference. Designers should still verify acquisition timing, input range configuration, calibration method, and environmental limits in the manufacturer datasheet.
推薦
Laboratory Instrumentation
AD974BR is useful in laboratory measurement equipment that acquires multiple low-bandwidth analog signals and transfers the results over a serial interface. The 16-bit conversion resolution can improve numerical resolution in instruments that measure slowly varying quantities, while the four-channel multiplexer allows a compact front end to scan several transducers or amplifier outputs. The 200 kSPS rate is appropriate for control, monitoring, and calibration functions rather than wideband oscilloscope acquisition. The internal reference and on-chip clock can reduce external component count, but a precision laboratory design should verify reference drift, clock jitter requirements, input settling, and calibration procedures before finalizing the architecture.
推薦
Sensor Interface Systems
AD974BR can serve as the acquisition element in a multi-sensor interface when conditioned outputs share compatible voltage ranges. Its four single-ended channels make it practical to monitor several resistive, voltage, or transducer-derived signals through one ADC core. The 16-bit format is valuable when the system must preserve small changes in the digitized output, while the 200 kSPS sampling capability supports rapid periodic scanning. Input protection, anti-alias filtering, reference stability, and source impedance must be designed around the selected analog range. Because the ADC uses a multiplexer and switched-capacitor conversion architecture, source settling and acquisition time should be verified rather than assumed.
推薦
Embedded Control Platforms
AD974BR is appropriate for embedded measurement and control platforms that need local analog acquisition without a separate high-channel-count converter. A microcontroller or DSP can receive converted values through the serial interface and use them for alarms, setpoint updates, diagnostics, or feedback calculations. The single +5 V supply and integrated +2.5 V reference help simplify system integration, although the host controller must match the required serial protocol and timing. The 200 kSPS rate is more than adequate for many control variables sampled periodically, but it does not imply simultaneous conversion of all four channels. Firmware should account for channel selection, conversion completion, calibration state, and power-down behavior.
推薦
Factory Automation Measurement
AD974BR can support factory automation systems that digitize several analog machine signals for monitoring and control. Inputs from position, pressure, current, and condition sensors can be selected through the four-channel multiplexer and converted into 16-bit digital values for a controller. Its single +5 V operation is convenient for compact control boards, while the internal reference and on-chip clock can reduce external circuitry. Industrial deployment should include proper input protection, grounding, calibration, diagnostic checks, and environmental qualification. The supplied data does not state an industrial temperature range or EMC certification, so those requirements must be verified separately before using the device in safety-critical or high-emission equipment.
推薦
Medical Measurement Equipment
AD974BR may be evaluated for low-bandwidth medical measurement equipment that requires several conditioned analog inputs and a compact serial-interface ADC. The 16-bit resolution can support precise digitizing of slow sensor signals, while the four-channel input multiplexer can reduce repeated converter circuitry. A medical design would need to address patient protection, isolation, grounding, leakage current, calibration, and applicable regulatory requirements separately; none of those certifications are stated in the supplied AD974BR data. The 200 kSPS throughput is suited to many monitoring signals but should be matched to the required bandwidth and diagnostic timing. Confirm the package pinout, analog input limits, and reference behavior from the official datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 AD974BR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD974AR | AD974ARZ | AD9744ARU | AD9744ARUZ | AD974BRZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
主要差異化特點
- Four-channel integrated acquisition (對比AD974AR)
- Single +5 V operation (對比AD9744ARU)
- Multiple supported input ranges (對比AD974ARZ)
設計說明
The AD974BR combines a multiplexer and switched-capacitor ADC, so analog source settling should be verified before selecting input-buffer impedance and channel-switching timing. Use the manufacturer acquisition-time and settling-time values when calculating the maximum source impedance. Keep the analog input traces short, place filtering and protection close to the device, and route return currents away from the reference and digital outputs to reduce conversion-dependent errors.
Design the +5 V supply with low noise and adequate decoupling close to the AD974BR. The verified manufacturer result specifies single +5 V operation and identifies maximum power dissipation as 120 mW, but it does not provide the detailed current-versus-conversion-rate table. Confirm the operating-mode current limits and recommended capacitor network in the datasheet, and budget analog and digital supply noise margins according to the required measurement resolution.
The 28-SOIC footprint requires a clean analog, reference, and digital layout. Place input-conditioning components near the associated pins, maintain a continuous ground reference, and separate the serial clock and data routing from sensitive analog inputs. Because the exact pinout and exposed-pad details are not present in the supplied data, verify the package drawing and land pattern from Analog Devices before fabrication rather than relying on a generic SOIC footprint.
Do not assume that the 200 kSPS rating means all four channels are sampled simultaneously. The four-channel input multiplexer generally requires sequential channel selection, and the interface controller must honor conversion timing and settling requirements. Also distinguish the +5 V supply from the supported analog input ranges of 0 V to +4 V, 0 V to +5 V, and ±10 V; incorrect range or grounding assumptions can produce clipped or invalid measurements.
合規資訊
The supplied manufacturer and distributor search results do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. Compliance must be confirmed from the current Analog Devices product documentation or authorized distributor records.