AD7686BCPZ - 16-Bit 500kSPS PulSAR ADC | Analog Devices
N.º da peça: AD7686BCPZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $17.7 | $17,70 |
| 10 | $16.5 | $165,00 |
| 100 | $14.8 | $1.480,00 |
| 500 | $13.2 | $6.600,00 |
| 1.000 | $11.9 | $11.900,00 |
AD7686BCPZ Visão geral
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values. The AD7686 is a SAR ADC, which uses a binary search algorithm to determine the digital output, offering a good balance of speed, resolution, and power consumption. SAR ADCs are widely used in industrial, medical, and instrumentation systems where high accuracy and moderate sampling rates are required.
Key features of the AD7686BCPZ include a maximum sampling rate of 500 kSPS, 16-bit resolution with no missing codes, and a typical signal-to-noise ratio (SNR) of 92 dB. The device also features a low power dissipation of 12.5 mW at 500 kSPS, which scales with throughput, making it ideal for battery-powered applications. The pseudo-differential input allows for flexible signal conditioning, and the SPI-compatible serial interface simplifies connection to microcontrollers and DSPs.
The AD7686 uses a charge redistribution (capacitive DAC) architecture with an internal reference buffer, achieving excellent linearity and low noise. The device includes a 1-pole low-pass filter on the analog input, which helps to reduce external noise. The LFCSP package provides a compact footprint and good thermal performance, enabling dense PCB layouts.
Typical applications include portable instrumentation, medical devices, data acquisition systems, and industrial process control. The high SNR and low power make it suitable for battery-operated equipment where power efficiency is critical. The device is also used in vibration analysis, motor control, and other precision measurement systems.
When designing with the AD7686BCPZ, ensure that the reference voltage is stable and well-decoupled. The analog input should be driven by a low-impedance source to maintain accuracy. The serial interface timing must be respected to avoid data corruption. Proper PCB layout, including a solid ground plane and short traces, is essential for achieving the specified performance.
Alternativas drop-in para AD7686BCPZ — 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 AD7686BCPZ (mesmo formato e footprint) — diferindo em Sampling Rate, Input Type, Resolution, Package, Interface.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD7686BCPZ-R2
✅ Drop-In✓ Em estoque
$6.8 / unidade
Ver ficha técnica →AD7686BCPZRL
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD7682BCPZ
✅ Drop-In✓ Em estoque
$4.98 / unidade
Ver ficha técnica →AD7685BCPZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$8.1 / unidade
Ver ficha técnica →AD7690BCPZRL7
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$17.6 / unidade
Ver ficha técnica →AD7980BCPZ-RL7
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$18 / unidade
Ver ficha técnica →AD7686BCPZ Classificações máximas e características elétricas
| Resolução | 16 bits |
| Taxa de amostragem | 500 kSPS |
| Number of Channels | 1 |
| Input Type | Pseudo-differential |
| Interface | SPI |
| Tensão de alimentação | 2.3V to 5.5V |
| Power Dissipation | 12.5 mW at 500 kSPS |
| SNR | 92 dB typical |
| Encapsulamento | 10-LFCSP-WD (3x3 mm) |
| Temperatura de operação | -40C to +125C |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Marking Code | C02# |
Configuração de pinos do AD7686BCPZ
| Pino 1 | IN+ — Positive analog input |
| Pino 2 | IN- — Negative analog input |
| Pino 3 | GND — Ground |
| Pino 4 | VDD — Power supply |
| Pino 5 | REF — Reference voltage input |
| Pino 6 | VIO — I/O supply voltage |
| Pino 7 | SCK — Serial clock input |
| Pino 8 | SDI — Serial data input |
| Pino 9 | SDO — Serial data output |
| Pino 10 | CNV — Convert input |
Aplicações típicas
AD7686BCPZ é adequado para 6 aplicaçãos: Portable Instrumentation, Medical Devices, Data Acquisition Systems, Industrial Process Control, Vibration Analysis, Motor Control.
Portable Instrumentation
The AD7686BCPZ's low power dissipation of 12.5 mW at 500 kSPS and wide supply voltage range of 2.3V to 5.5V make it ideal for battery-powered portable instruments. Its 16-bit resolution and 92 dB SNR ensure accurate measurements in field devices such as handheld multimeters and data loggers. The compact 10-lead LFCSP package saves board space, and the SPI interface simplifies connection to low-power microcontrollers. Power scaling with throughput allows designers to optimize battery life by reducing sampling rate when high speed is not required.
Recomendado
Medical Devices
In medical devices such as patient monitors and diagnostic equipment, the AD7686BCPZ provides high-resolution conversion with 16-bit accuracy and 92 dB SNR, ensuring reliable signal integrity for vital sign monitoring. Its low power consumption is critical for portable and wearable medical devices. The pseudo-differential input helps reject common-mode noise from biological signals. The device operates over -40C to +125C, suitable for clinical environments. The SPI interface allows easy integration with medical-grade microcontrollers, and the small package enables miniaturized device designs.
Recomendado
Data Acquisition Systems
The AD7686BCPZ is well-suited for data acquisition systems requiring high speed and precision. With a 500 kSPS sampling rate and 16-bit resolution, it can capture fast-changing signals with high fidelity. The SPI interface enables straightforward connection to FPGAs and DSPs for real-time processing. The device's low power dissipation is advantageous in multi-channel systems where multiple ADCs are used. The pseudo-differential input allows flexible signal conditioning, and the small LFCSP package supports dense PCB layouts. Its wide supply range accommodates various system power rails.
Recomendado
Industrial Process Control
In industrial process control, the AD7686BCPZ offers high accuracy and reliability for monitoring and control loops. Its 16-bit resolution and 92 dB SNR ensure precise measurement of process variables such as temperature, pressure, and flow. The device operates over a wide temperature range of -40C to +125C, suitable for harsh industrial environments. The pseudo-differential input helps reject noise from long sensor leads. The SPI interface allows easy integration with industrial microcontrollers and PLCs. Low power consumption reduces heat generation in control cabinets.
Recomendado
Vibration Analysis
The AD7686BCPZ is used in vibration analysis systems to digitize accelerometer signals with high resolution and speed. Its 500 kSPS sampling rate captures high-frequency vibrations, while 16-bit resolution and 92 dB SNR preserve signal details. The low power dissipation is beneficial for battery-operated condition monitoring devices. The pseudo-differential input reduces noise from the sensor interface. The compact package allows integration into small sensor nodes. The SPI interface enables efficient data transfer to a host processor for FFT analysis.
Recomendado
Motor Control
In motor control systems, the AD7686BCPZ provides precise current and voltage sensing for feedback loops. Its 16-bit resolution and 500 kSPS sampling rate enable accurate monitoring of motor phase currents and bus voltages. The device's low power dissipation is suitable for integrated motor drives. The pseudo-differential input allows direct connection to shunt resistors. The SPI interface interfaces with motor control MCUs and DSPs. The wide operating temperature range ensures reliable operation in industrial motor applications.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD7686BCPZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD7686BCPZ-R2 | AD7682BCPZ | AD7980BCPZ |
|---|---|---|---|---|
| Package | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) - same | 10-LFCSP-WD (3x3 mm) - same | 10-LFCSP-WD (3x3 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 500 kSPS | 500 kSPS | 250 kSPS | 1 MSPS |
| Number of Channels | 1 | 1 | 4 | 1 |
| Input Type | Pseudo-differential | Pseudo-differential | Pseudo-differential | Pseudo-differential |
| SNR | 92 dB | 92 dB | 92 dB | 91 dB |
| Power Dissipation | 12.5 mW at 500 kSPS | 12.5 mW at 500 kSPS | 7.5 mW at 250 kSPS | 7 mW at 1 MSPS |
Principais diferenciais
- Higher sampling rate than AD7682BCPZ (vs AD7682BCPZ)
- Lower power than AD7980BCPZ at comparable speed (vs AD7980BCPZ)
- Single-channel simplicity (vs AD7682BCPZ)
Notas de projeto
The AD7686BCPZ operates from a 2.3V to 5.5V supply. Use a low-noise LDO to power the VDD pin and a separate clean supply for VIO to avoid digital noise coupling. Decouple each supply pin with a 0.1uF ceramic capacitor placed close to the pin, and a 10uF bulk capacitor for low-frequency stability. The reference input (REF) should be driven by a low-impedance source, such as a precision reference buffer, to maintain accuracy.
For optimal performance, use a solid ground plane and minimize trace lengths between the ADC and signal source. Place the analog input filter components close to the IN+ and IN- pins. Keep digital traces (SCK, SDI, SDO, CNV) away from analog traces to reduce crosstalk. The exposed pad on the LFCSP package should be soldered to the ground plane for thermal and electrical performance.
Ensure the analog input voltage does not exceed the supply rails. The pseudo-differential input requires the IN- pin to be at a known potential; connect it to a clean ground or a reference voltage. Avoid floating the CNV pin; it should be driven by a clean digital signal to initiate conversions. The SPI interface timing must meet the datasheet specifications to prevent data corruption.
Informações de conformidade
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided sources.