AD4697BCPZ - 16-Bit 8-Ch SAR ADC | Analog Devices
N.º da peça: AD4697BCPZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para AD4697BCPZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD4697BCPZ (mesmo formato e footprint) — diferindo em Number of Channels, Package, Sampling Rate, Analog Supply Voltage, Input Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD4696BCPZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$11.75 / unidade
Ver ficha técnica →AD4698BCPZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$7.41 / unidade
Ver ficha técnica →AD7091R-8BRUZ
⚡ Mesmo encapsulamento ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD4697BCPZ Classificações máximas e características elétricas
| Resolução | 16 Bit |
| Number of Channels | 8 Input (Multiplexed) |
| Architecture | SAR |
| Taxa de amostragem | 500 kSPS / 1 MSPS |
| Encapsulamento | 24-LFCSP (4x4) |
| Tipo de montagem | Surface Mount |
| Input Mode | Easy Drive high-Z mode |
| Reference Input | High-Z mode; WLCSP option includes internal reference buffer |
Guia de Configuração de Pinos do AD4697BCPZ 24-lfcsp (4x4)
Configuração de pinos para AD4697BCPZ (pacote 24-lfcsp (4x4)). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para AD4697BCPZ.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AD4697BCPZ é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD4697BCPZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- 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)
Notas de projeto
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.
Informações de conformidade
Compliance data not present in retrieved supplier snippets; verify on Analog Devices product page.
