ADA4940-1ACPZ-R7

Overview

The ADA4940-1ACPZ-R7 is a fully differential amplifier from Analog Devices, designed as an ultralow power and low distortion driver for high-resolution SAR and Sigma-Delta ADCs. It features a small signal bandwidth of 260 MHz at unity gain and a slew rate of 95 V/µs. The device operates on flexible power supplies ranging from 3 V to 7 V with a quiescent current of 1.25 mA per amplifier. It provides balanced outputs with an adjustable common-mode voltage and includes a disable pin for power reduction.

Feature Summary

• Ultralow power consumption with 1.25 mA quiescent current per amplifier
• Extremely low harmonic distortion performance across wide frequency ranges
• Adjustable output common-mode voltage matching multiple ADC inputs
• Internal common-mode feedback loop ensures exceptional output balance

Applications

• Low power PulSAR/SAR ADC drivers
• Single-ended-to-differential conversion
• Differential buffers
• Line drivers
• Medical imaging systems

Procurement Notes

Verify the specific package type and reel configuration against the official ordering guide. Confirm that the LFCSP-16 variant matches the required thermal and mechanical specifications for the target PCB layout. Ensure compatibility with the intended supply voltage range and operating temperature conditions before finalizing procurement.

Selection Notes

Select this component when driving high-resolution ADCs requiring minimal power consumption and low noise. The adjustable VOCM allows flexibility in interfacing with various ADC input common-mode requirements. Consider the disabled state current if power management during idle periods is critical for the application design.

Part Context

This part belongs to the ADA4940 family of fully differential amplifiers manufactured using Analog Devices' SiGe complementary bipolar process. The family includes single-channel (ADA4940-1) and dual-channel (ADA4940-2) variants, optimized for data acquisition and signal processing applications requiring high dynamic performance.

Replacement Considerations

The ADA4940-1AR-EBZ evaluation board supports testing the SOIC package variant. For direct functional replacements within the same family, consider the ADA4940-2ACPZ-RL for dual-channel applications.