AD974BRS - 4-Channel 16-Bit 200 kSPS ADC | Analog Devices
部品番号: AD974BRS ✓ 生産中AD974BRS 概要
An ADC is an analog-to-digital converter, a semiconductor that transforms continuously varying analog voltage into numerical data. Within the broader hierarchy, the AD974BRS is a data acquisition system and sampling ADC, belonging to the ADC/DAC and integrated-circuit categories. Its internal multiplexer reduces the number of physical input channels required from the host processor while retaining independent conversion capability for four single-ended analog inputs.
The principal features include 16-bit resolution, 200 kSPS throughput, four single-ended analog inputs, a 5 V single-supply architecture, and both internal and external 2.5 V reference options. The on-chip clock reduces the number of external timing components required in a basic acquisition circuit. Power-down operation can also reduce consumption when the measurement system is not actively sampling, although the complete converter specifications and timing behavior must be checked in the manufacturer datasheet before sequencing external analog switches.
The AD974BRS uses a successive-approximation, switched-capacitor conversion architecture. This approach provides a compact ADC core suitable for precision multichannel measurement. Its serial interface reduces the number of data connections required between the converter and a digital controller, but it also makes software timing and clock configuration important. Because all channels share one internal ADC and reference system, calibration considerations and channel-to-channel performance should be evaluated for the intended instrumentation system.
Typical uses include industrial process monitoring, laboratory data acquisition, environmental sensing, portable instrumentation, and embedded measurement systems. The four-channel multiplexer is useful when several sensor outputs must be sampled into one controller. The ±10 V input option is particularly relevant for legacy industrial interfaces, while the narrower ranges can be used with appropriately conditioned low-voltage sensors. The 5 V supply requirement also simplifies integration with systems that already operate from a regulated 5 V rail.
Designers should preserve the analog input range and reference requirements of each channel, verify acquisition timing against the serial-interface clock, and use source and termination networks that do not distort the sampled signal. External reference and input filtering choices can affect accuracy and settling behavior, so the manufacturer’s recommended application circuit should be treated as the baseline design.
This page consolidates the verified manufacturer specifications, distributor sourcing information, package details, application guidance, and same-family replacement information into a design-focused reference for engineers evaluating the AD974BRS.
ドロップイン代替品: AD974BRS — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AD974BRS （同一形状・フットプリント） — 相違点: ADC Resolution, Package, Reference Selection, Supply Voltage.
AD974ARS
✅ ドロップイン価格はお問い合わせください
データシートを見る →AD974BR
✅ ドロップイン価格はお問い合わせください
データシートを見る →AD974BRSZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD974BRS-RL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD974ARSZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD974BRS 最大定格＆電気的特性
| Number of Analog Input Channels | 4 channels |
| ADC Resolution | 16 bits |
| Sampling Throughput | 200 kSPS |
| Input Multiplexer | 4-channel single-ended input multiplexer |
| Supported Analog Input Ranges | 0 V to +4 V, 0 V to +5 V, or ±10 V |
| 電源電圧 | +5 V |
| Internal Reference Voltage | +2.5 V |
| Reference Selection | Internal or external 2.5 V reference |
| Maximum Power Dissipation | 120 mW |
| Power-Down Mode | Supported |
| Conversion Architecture | Successive-approximation switched-capacitor ADC |
| Digital Interface | High-speed serial interface |
| On-Chip Clock | Supported |
| パッケージ | 28-SSOP |
| 実装タイプ | Surface mount |
| Analog Input Type | Single-ended |
AD974BRS 28-ssop ピン配置ガイド
AD974BRS (28-ssop パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AD974BRS.
詳細は データシート をご参照ください。
主な用途
AD974BRS の用途: 6 件s: Industrial Process Monitoring, Laboratory Data Acquisition, Environmental Sensor Acquisition, Portable Measurement Instruments, Communication and Control Systems, Power and Battery Systems.
Industrial Process Monitoring
The AD974BRS fits industrial process-monitoring systems that must scan several conditioned sensor outputs through one high-resolution converter. Its four-channel single-ended multiplexer supports 0 V to +4 V, 0 V to +5 V, or ±10 V inputs, depending on the selected analog range, while 200 kSPS throughput provides adequate sampling for many pressure, temperature, and level signals. The converter’s 16-bit nominal resolution and internal 2.5 V reference simplify acquisition design, and its single +5 V supply reduces power-system complexity. The practical trade-off is that all four channels share one ADC core, so the complete multiplexer and ADC acquisition cycle must be managed by the host controller. Maximum dissipation of 120 mW also makes thermal checks straightforward in sealed industrial equipment.
おすすめ
Laboratory Data Acquisition
The AD974BRS is suitable for laboratory instruments that acquire four single-ended channels through a serial data path. Its 16-bit resolution and 200 kSPS throughput provide a useful balance between measurement detail and acquisition speed for slow or moderate-bandwidth signals. The internal 2.5 V reference allows a straightforward system, while the option to use an external reference supports precision-oriented designs. Operating from one +5 V rail simplifies bench instrument architecture and permits the power-down mode to conserve energy between measurement bursts. For instrumentation, however, input settling, source impedance, channel multiplexing time, and serial clocking must be evaluated. The verified excerpts do not provide complete acquisition-timing or noise tables, so those values should be taken directly from the Analog Devices manufacturer data sheet.
おすすめ
Environmental Sensor Acquisition
The AD974BRS can centralize several environmental sensor channels in a compact monitoring terminal. Four single-ended inputs allow temperature, humidity, light, or gas-sensor signals to share a 16-bit converter, provided each conditioned output remains inside the selected 0 V to +5 V or ±10 V range. The 200 kSPS rate is more than sufficient for many slow environmental measurements, while the internal multiplexer and on-chip clock reduce the number of external timing and selection components. Its single +5 V operating supply is helpful in remote or battery-assisted installations where regulator complexity matters. Power-down mode can reduce consumption during inactive periods. Design attention should focus on sensor settling time, protection from transient industrial voltages, and ensuring that the selected range uses the converter’s full useful input span.
おすすめ
Portable Measurement Instruments
The AD974BRS supports portable measurement instruments that need several analog channels, moderate-speed sampling, and low supply complexity. At 200 kSPS with 16-bit nominal resolution, it is suitable for compact recorders, field test equipment, and handheld diagnostic devices measuring slowly changing analog quantities. The four-channel input multiplexer limits the number of converter packages and data-interface connections, while operation from one +5 V rail simplifies battery or USB-derived power designs. Maximum power dissipation of 120 mW is also favorable for portable equipment, although actual battery life depends on the power-down strategy and surrounding circuitry. Engineers should verify the complete acquisition cycle, account for analog source impedance and settling, and confirm the selected package’s soldering and inspection requirements before committing the design to high-volume production.
おすすめ
Communication and Control Systems
The AD974BRS can serve as the analog acquisition section of an embedded communication or control system requiring repeated conversion of several analog feedback signals. Its four-channel multiplexer supports cyclic sampling, while the serial interface reduces parallel wiring between the converter and digital controller. The 16-bit, 200 kSPS ADC is appropriate for many control and monitoring loops that do not require high-frequency waveform capture. A single +5 V supply and maximum 120 mW dissipation simplify integration into distributed control hardware. The main design consideration is timing: the controller must account for multiplexer selection, acquisition latency, reference behavior, and serial transfer before using the converted code in a feedback decision. The manufacturer’s recommended application circuit and timing tables should therefore be treated as the authority for implementation.
おすすめ
Power and Battery Systems
The AD974BRS is suitable for power-system monitors that measure several voltage or current-sensor outputs while operating from a regulated 5 V rail. The converter accepts 0 V to +4 V or 0 V to +5 V ranges for suitable conditioned signals, and the four-channel multiplexer supports compact multi-rail monitoring without four separate ADC packages. Its 200 kSPS rate permits repeated measurements of changing system conditions, while the internal 2.5 V reference and optional external reference provide flexibility. The power-down mode can reduce demand when measurements are not continuously required, and the 120 mW maximum dissipation is relatively low for a 16-bit converter. Designers must ensure that sensor outputs remain within range, account for ground and reference noise in high-current systems, and include protection against switching transients before connecting external power nodes.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD974BRS — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | AD974ARS | AD974BR | AD974BRSZ | AD974BRS-RL7 | AD974ARSZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Throughput | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Supply Voltage | Single +5 V | Single +5 V | Single +5 V | Single +5 V | Single +5 V | Single +5 V |
| Internal Reference | +2.5 V | +2.5 V | +2.5 V | +2.5 V | +2.5 V | +2.5 V |
| Maximum Power Dissipation | 120 mW | 120 mW | 120 mW | 120 mW | 120 mW | 120 mW |
| Analog Input Ranges | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V | 0 V to +4 V, 0 V to +5 V, or ±10 V |
| Digital Interface | Serial | Serial | Serial | Serial | Serial | Serial |
主な差別化要因
- Four-channel integration reduces external converter count （vs AD974ARS)
- Wide choice of conditioned analog input ranges （vs AD974BRS-RL7)
- Integrated reference and clock support compact acquisition designs （vs AD974BR)
設計ノート
Do not treat 16-bit nominal resolution as guaranteed noise performance or select the ±10 V range without checking the complete Analog Devices accuracy tables. The four channels are multiplexed into one sampling ADC, so source impedance, multiplexer settling time, and the selected range must be considered together. Use the manufacturer application circuit as the baseline and verify acquisition timing in the final controller firmware.
The AD974BRS operates from a single +5 V supply and has a stated maximum dissipation of 120 mW. Decouple the supply close to the device using the capacitance and layout recommendations in the manufacturer datasheet; do not substitute arbitrary high-capacitance values that could upset power-down behavior or reference stability. Keep switching regulators and high-current digital paths physically separated from the analog input and reference routing.
Route the four analog inputs as short, guarded traces with a continuous ground reference, and place input protection, filtering, and conditioning components near the converter pins. The 28-SSOP footprint has closely spaced leads, so inspect solder joints and keep adjacent digital or switching nodes away from sensitive analog pins. A full ground plane and symmetric reference routing are preferable to long, narrow analog traces.
The serial interface requires a controller clock and data-transfer sequence compatible with the ADC’s acquisition cycle. Follow the Analog Devices serial-interface timing diagrams exactly, including data setup, hold, and read-command intervals. If an external 2.5 V reference is used, its noise, startup behavior, and drive capability must meet the data-sheet requirements; otherwise use the internal reference for the simpler configuration.
コンプライアンス情報
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification status for AD974BRS. AEC-Q100 is not applicable because no automotive qualification is identified.