AD7686BCPZ - 16-Bit 500kSPS PulSAR ADC | Analog Devices
MPN: AD7686BCPZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for AD7686BCPZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7686BCPZ-R2
β Drop-Inπ Reference alternative (not in catalog)
AD7686BCPZRL
β Drop-Inπ Reference alternative (not in catalog)
AD7682BCPZ
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View Datasheet βAD7690BCPZRL7
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View Datasheet βAD7980BCPZ-RL7
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View Datasheet βAD7686BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Sampling Rate | 500 kSPS |
| Number of Channels | 1 |
| Input Type | Pseudo-differential |
| Interface | SPI |
| Supply Voltage | 2.3V to 5.5V |
| Power Dissipation | 12.5 mW at 500 kSPS |
| SNR | 92 dB typical |
| INL | [DATA_NEEDED: INL] |
| DNL | [DATA_NEEDED: DNL] |
| Package | 10-LFCSP-WD (3x3 mm) |
| Operating Temperature | -40C to +125C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Marking Code | C02# |
AD7686BCPZ Pin Configuration
| Pin 1 | IN+ β Positive analog input |
| Pin 2 | IN- β Negative analog input |
| Pin 3 | GND β Ground |
| Pin 4 | VDD β Power supply |
| Pin 5 | REF β Reference voltage input |
| Pin 6 | VIO β I/O supply voltage |
| Pin 7 | SCK β Serial clock input |
| Pin 8 | SDI β Serial data input |
| Pin 9 | SDO β Serial data output |
| Pin 10 | CNV β Convert input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7686BCPZ is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for AD7686BCPZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Higher sampling rate than AD7682BCPZ (vs AD7682BCPZ)
- Lower power than AD7980BCPZ at comparable speed (vs AD7980BCPZ)
- Single-channel simplicity (vs AD7682BCPZ)
Design Notes
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.
Compliance Information
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided sources.
