ADA4922-1ARDZ-R7

Overview

The ADA4922-1ARDZ-R7 is a high-voltage differential driver designed for 16-bit to 18-bit ADCs. It converts single-ended inputs to differential outputs with a fixed gain of +2 V/V, requiring no external components. Operating on supplies from 5 V to 26 V, it delivers a −3 dB bandwidth of 38 MHz at G=+2 and a slew rate of 730 V/µs. The device features low noise (12 nV/√Hz), low distortion (-99 dBc HD at 100 kHz), and a disable function. It is housed in an 8-lead SOIC package with an exposed pad.

Feature Summary

• Converts single-ended signals to differential outputs without external gain components
• Operates on wide supply voltages up to 26 V for high output swing
• Includes a dedicated disable pin to minimize power consumption
• Manufactured using proprietary XFCB process for high voltage performance

Applications

• High voltage data acquisition systems
• Industrial instrumentation
• Spectrum analysis
• Automated test equipment
• Medical instruments

Procurement Notes

Verify the RD-8-4 package option corresponds to the 8-lead SOIC with exposed pad. Confirm the -R7 suffix indicates reel packaging. Ensure the ARDZ designation matches the required -40°C to +85°C temperature range and RoHS compliance status before finalizing procurement specifications.

Selection Notes

Select this component when driving differential input ADCs with resolutions up to 18 bits. It is suitable for applications requiring high common-mode rejection and wide dynamic range. Consider the fixed gain of +2 and the specific supply voltage requirements for optimal performance in industrial or medical signal chains.

Part Context

This part belongs to the ADA4922 family of high-voltage differential drivers. It utilizes Analog Devices' second-generation XFCB process technology. The device is optimized for precision applications where low distortion and high signal-to-noise ratio are critical for maintaining accuracy in high-resolution data conversion systems.

Replacement Considerations

ADA4922-1ACPZ-R2

FAQ

How does the REF pin affect the output?

The REF pin sets the baseline for the inverting path and determines the DC offset between the differential outputs. Setting it to the input midswing level minimizes differential offset.

What is the purpose of the DIS pin?

The DIS pin provides a disable feature to reduce quiescent current. It is active low; applying a voltage below the threshold disables the amplifier without tri-stating the outputs.