ADA4922-1ARDZ-RL

Overview

The ADA4922-1ARDZ-RL is a high-voltage differential driver designed for 16-bit to 18-bit ADCs with input ranges up to ±20 V. It converts single-ended signals to differential outputs with a fixed gain of 2, requiring no external components. Key specifications include a 38 MHz bandwidth at small signal levels, 12 nV/√Hz output noise, and -99 dBc harmonic distortion. The device operates on a 5 V to 26 V supply range, delivers over 40 V p-p differential output, and features a low-power disable function. It is housed in an 8-lead SOIC package with an exposed thermal pad.

Feature Summary

• Converts single-ended inputs to differential outputs with a fixed gain of 2 without external feedback components
• Optimized for driving high-resolution ADCs with low distortion and high signal-to-noise ratio
• Includes a dedicated disable pin to minimize power consumption when the device is inactive
• Utilizes proprietary XFCB process technology to achieve excellent noise performance on high supply voltages

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required package type, as the RD-8-4 designation corresponds to the 8-lead SOIC with an exposed pad. Confirm RoHS compliance status indicated by the Z suffix. Ensure the supply voltage range aligns with system requirements before integration. Check datasheet thermal resistance values for proper PCB heat dissipation planning.

Selection Notes

Select this component when driving differential input ADCs requiring high voltage swings and fixed gain conversion. The internal 600 Ω feedback network simplifies design but impacts power dissipation calculations. Consider the disable feature for power-sensitive applications. Evaluate thermal management needs due to internal resistor power dissipation under large signal conditions.

Part Context

This part belongs to the ADA4922 family of high-voltage differential drivers manufactured by Analog Devices. It is specifically optimized for interfacing single-ended sources with high-resolution analog-to-digital converters. The device leverages second-generation XFCB process technology to maintain low noise and distortion characteristics across wide supply voltage ranges.

Replacement Considerations

ADA4922-1ACPZ-R2 serves as a direct functional substitute utilizing the LFCSP package variant.