AD4697BCPZ - 16-Bit 8-Ch SAR ADC | Analog Devices
部品番号: AD4697BCPZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $16 | $16.00 |
| 10 | $14.5 | $145.00 |
| 100 | $12.75 | $1,275.00 |
| 500 | $11.85 | $5,925.00 |
| 1,000 | $10.95 | $10,950.00 |
AD4697BCPZ 概要
What is a SAR ADC? A successive approximation register ADC is a type of analog-to-digital converter that uses a binary-search algorithm to determine the digital code closest to the analog input voltage. SAR converters are well known for their low power, moderate-to-high resolution, and fast conversion times compared to delta-sigma converters. In the hierarchy of signal chains, a SAR ADC follows the analog front-end (sensors, amplifiers, filters) and precedes the digital processor; its output feeds microcontrollers, DSPs, or FPGAs. The AD4697 fits this role as a precision measurement core, converting multiplexed analog signals into clean digital words.
Key features of the AD4697BCPZ include the Easy Drive input architecture, which provides a high-Z analog input mode and a high-Z reference input mode. According to the Analog Devices product page, this simplifies system design by removing the need for dedicated high-speed ADC drivers and reference buffers, reducing component count and increasing channel density. The WLCSP option of the AD4697/AD4698 family includes an internal reference buffer for a true buffered reference input. The LFCSP-24 package measures only 4 mm x 4 mm and is surface-mount compatible.
Architecturally, the AD4697 uses a multiplexed SAR core that sequentially samples each of the eight inputs. The high-Z input mode enables direct connection to many sensor types, while the high-Z reference input supports a precision external reference without extra buffering. Distributor listings from DigiKey and Mouser confirm 16-bit resolution, 8 input channels, SAR architecture, and 500 kSPS throughput; the family is also described as a 500 kSPS/1 MSPS device in datasheet aggregator listings.
Typical applications include industrial process control with multiple 4-20 mA or voltage sensors, battery management system monitoring for cell voltages and temperatures, medical instrumentation such as patient monitors, power line monitoring, and general test and measurement data acquisition modules. The small package and high channel count make the AD4697 well suited to dense PCBs.
When designing with this ADC, pay attention to input settling: after the multiplexer switches channels, allow sufficient acquisition time for the sampling capacitor to settle. Decouple the supply pins with 0.1 uF and 10 uF capacitors, connect the exposed pad to ground, and use a stable external reference such as the REF192ESZ for best accuracy.
ドロップイン代替品: AD4697BCPZ — 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: AD4697BCPZ （同一形状・フットプリント） — 相違点: Number of Channels, Package, Sampling Rate, Analog Supply Voltage, Input Type.
クイック比較ツール — 並列比較する代替部品を選択:
AD4696BCPZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$11.75 / 個
データシートを見る →AD4698BCPZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$7.41 / 個
データシートを見る →AD7091R-8BRUZ
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AD4697BCPZ 最大定格＆電気的特性
| 分解能 | 16 Bit |
| Number of Channels | 8 Input (Multiplexed) |
| Architecture | SAR |
| サンプリングレート | 500 kSPS / 1 MSPS |
| パッケージ | 24-LFCSP (4x4) |
| 実装タイプ | Surface Mount |
| Input Mode | Easy Drive high-Z mode |
| Reference Input | High-Z mode; WLCSP option includes internal reference buffer |
AD4697BCPZ 24-lfcsp (4x4) ピン配置ガイド
AD4697BCPZ (24-lfcsp (4x4) 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: AD4697BCPZ.
詳細は データシート をご参照ください。
主な用途
AD4697BCPZ の用途: 6 件s: Industrial Process Control, Battery Management System (BMS) Monitoring, Medical Instrumentation, Power Line Monitoring, Test and Measurement / Data Acquisition, IoT-Enabled Smart Sensor Nodes.
Industrial Process Control
AD4697BCPZ excels in industrial process control where multiple analog sensors must be digitized with 16-bit precision. Its 8-channel multiplexed input lets one converter monitor eight separate 4-20 mA loops or voltage outputs, while the Easy Drive high-Z input mode reduces burden on sensor amplifiers and eliminates external ADC drivers. At 500 kSPS/1 MSPS throughput, it can scan all eight channels rapidly for control-loop updates. Place a REF192ESZ voltage reference and ADA4522-2ARZ signal conditioning ahead of the ADC to maintain accuracy. Compared to discrete single-channel ADCs, this device increases channel density and simplifies BOM.
おすすめ
Battery Management System (BMS) Monitoring
AD4697BCPZ suits battery management systems (BMS) that monitor cell voltages and temperatures across a stack. Its 8 channels can be configured for single-ended cell-voltage taps and thermistor temperature readings; 16-bit resolution gives fine voltage granularity. The high-Z reference input accepts a stable precision reference such as REF192ESZ, while the multiplexed SAR architecture ensures low latency compared to delta-sigma converters. With 500 kSPS/1 MSPS throughput, the ADC can scan the complete pack quickly. The LFCSP-24 package is compact for space-constrained BMS boards. Use isolation and filtering per the AD4697 datasheet for noisy automotive environments.
おすすめ
Medical Instrumentation
AD4697BCPZ's 16-bit resolution and Easy Drive inputs make it well suited to medical instrumentation such as patient monitors, ECG and blood pressure modules. The high-Z input mode preserves signal integrity from high-impedance sensors without requiring a dedicated ADC driver, which lowers power and noise in portable devices. Its 8-channel multiplexer can sample multiple physiological signals in sequence; 500 kSPS/1 MSPS throughput easily captures ECG bandwidths of a few hundred hertz. The small 24-LFCSP package fits compact medical PCBs. Pair with a low-noise REF192ESZ reference and ADA4522-2ARZ amplifier for best performance. Compliance with medical safety standards must be verified in the end system.
おすすめ
Power Line Monitoring
In power quality monitoring and energy metering, AD4697BCPZ digitizes voltage and current waveforms from instrument transformers. The 8-channel multiplexer can connect to three-phase voltages and neutral currents, while 16-bit resolution captures harmonic content down to small amplitudes. Easy Drive high-Z inputs allow the ADC to be driven through simple resistive dividers without a high-speed op amp, and the high-Z reference input permits a precision reference like REF192ESZ. With 500 kSPS/1 MSPS sampling, the device resolves 50/60 Hz fundamentals and harmonics with ample oversampling. The LFCSP-24 package is suitable for compact metering modules.
おすすめ
Test and Measurement / Data Acquisition
For benchtop multimeters, data acquisition (DAQ) modules, and ATE systems, AD4697BCPZ delivers 16-bit, 8-channel multiplexed conversion in a compact LFCSP-24 package. Its 500 kSPS/1 MSPS throughput supports scanning multiple inputs with good update rates. The Easy Drive feature simplifies front-end design: high-Z inputs eliminate the need for buffer amplifiers, reducing cost and PC board area. The device is compatible with standard serial control signals and requires an external precision reference. Use a low-noise REF192ESZ reference and remember to decouple the LFCSP-24 supply pins with 0.1 uF and 10 uF capacitors. This ADC is an excellent drop-in for multi-channel precision measurements.
おすすめ
IoT-Enabled Smart Sensor Nodes
In IoT-enabled sensor nodes and smart factory systems, AD4697BCPZ acts as a precision 16-bit conversion engine for multiple analog sensors. The 8 channels read pressure, temperature, and strain gauges, while Easy Drive high-Z inputs allow direct connection to many sensors without complex driver circuits. Low per-channel cost and a small LFCSP-24 footprint enable high-density designs. Its 500 kSPS/1 MSPS mode supports burst sampling triggered by a microcontroller, then the node sleeps for low-power operation. Pair with REF192ESZ for a stable voltage reference and ADA4522-2ARZ for any required signal scaling. This configuration saves board space and power compared to discrete ADC front ends.
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: AD4697BCPZ — 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 | AD4696BCPZ | AD4698BCPZ | AD7091R-8BRUZ |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-LFCSP (4x4) | 24-LFCSP (4x4) - same | 24-LFCSP (4x4) - same | 24-LFCSP (4x4) - same |
| Resolution | 16 Bit | 16 Bit | 16 Bit | 12 Bit |
| Number of Channels | 8 Input (Multiplexed) | 8 Input (Multiplexed) | 8 Input (Multiplexed) | 8 Input (Multiplexed) |
| Sampling Rate | 500 kSPS / 1 MSPS | 500 kSPS baseline | 1 MSPS tier | 1 MSPS |
| Architecture | SAR | SAR | SAR | SAR |
| Easy Drive High-Z Input | Yes | Yes | Yes | No |
| Reference High-Z Input | Yes | Yes | Yes | No |
| Pin Compatibility | Reference | Drop-in | Drop-in | Verify pinout |
主な差別化要因
- Easy Drive high-Z inputs simplify analog front end （vs AD7091R-8BRUZ)
- Higher throughput option （vs AD4696BCPZ)
- 16-bit vs 12-bit resolution （vs AD7091R-8BRUZ)
設計ノート
Use a solid ground plane under the 24-lead LFCSP (4x4 mm) and connect the exposed pad directly to ground. Place 0.1 uF and 10 uF decoupling capacitors as close as possible to the supply pins. Keep analog inputs away from digital traces to avoid coupling; if possible route them on opposite sides of the PCB. Refer to the AD4697 data sheet recommended layout for the LFCSP package.
The AD4697 Easy Drive high-Z input mode permits high impedance sources, but the source impedance must be considered with acquisition time. For multiplexed scanning, allow adequate settling after channel switch. Use a low-leakage input filter and a precise external reference; the high-Z reference input still benefits from a 0.1 uF reference decoupling capacitor. Larger source resistances reduce achievable throughput, so balance input filtering with conversion rate.
Do not operate the AD4697 outside its [DATA_NEEDED: supply/voltage/temperature] limits. Because the device multiplexes 8 channels, confirm that previous channel residue settles before sampling to avoid cross-channel crosstalk. For applications requiring the internal reference buffer option, note that the WLCSP variant includes it; the LFCSP-24 package must use an external reference. Always pull unused inputs to a known potential to prevent floating-channel errors.
コンプライアンス情報
Compliance data not present in retrieved supplier snippets; verify on Analog Devices product page.
