AD7940BCPZ-RL7

Overview

The AD7940BCPZ-RL7 is a 16-bit, 500 kSPS successive approximation register (SAR) analog-to-digital converter from Analog Devices. It operates on a single 2.7 V to 5.5 V supply and features a pseudo-differential input range of 0 V to VREF. The device includes an internal 2.5 V reference and supports SPI-compatible serial interfaces. Key performance metrics include a typical SNR of 83 dB and power dissipation of 4 mW at 500 kSPS. It is housed in a 10-lead LFCSP package rated for -40°C to +125°C operation.

Feature Summary

• 16-bit resolution with no missing codes
• Internal 2.5 V reference or external option
• Single-supply operation (2.7 V to 5.5 V)
• SPI/MICROWIRE/QSPI/DSP compatible serial interface

Applications

• Data acquisition systems
• Industrial process control
• Medical instrumentation

Procurement Notes

Verify the specific suffix 'RL7' indicates reel packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure voltage levels match system requirements.

Selection Notes

Select this component for applications requiring high accuracy and moderate speed. Compare against the AD7944 for higher throughput needs. Verify that the pseudo-differential input architecture aligns with the sensor interface design.

Part Context

This part belongs to the AD794x family of PulSAR ADCs. It shares architectural similarities with the AD7944 but offers lower sampling rates. The B-grade designation typically indicates tighter performance specifications compared to standard grades.

Replacement Considerations

The AD7944BCPZ-RL7 serves as a higher-speed alternative within the same package. Cross-reference pinouts carefully when substituting with other 16-bit SAR ADCs from different manufacturers.