ADA4938-2ACPZ-R2

Overview

The ADA4938-2ACPZ-R2 is a dual-channel, ultralow distortion differential amplifier designed as an ADC driver. It features a 1000 MHz small-signal bandwidth and a 4700 V/µs slew rate. The device operates on supply voltages ranging from +5 V to ±5 V with a quiescent current of 37 mA per channel. It delivers -106 dBc second harmonic distortion at 10 MHz and includes an adjustable output common-mode voltage. Packaged in a 24-lead LFCSP (4 mm × 4 mm), it supports single-ended-to-differential conversion.

Feature Summary

• Internal common-mode feedback loop provides exceptional output balance and suppresses even-order harmonic distortion products.
• External four-resistor feedback network allows flexible configuration for full differential or single-ended-to-differential gain settings.
• Adjustable output common-mode voltage enables precise matching to the input requirements of high-performance analog-to-digital converters.

Applications

• Driving high-resolution analog-to-digital converters
• Single-ended-to-differential signal conversion
• Intermediate frequency and baseband gain modules

Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest documentation to ensure authenticity. Confirm that the ordering suffix corresponds to the reel quantity and tape specifications required for your assembly line. Check for any recent product change notices regarding pinout or electrical parameter updates before finalizing procurement.

Selection Notes

Select this component when driving ADCs requiring low noise and high dynamic range. Ensure the application utilizes the recommended external resistor values to maintain stability and optimal distortion performance. Verify that the power supply rails and common-mode voltage settings align with the target ADC input specifications.

Part Context

This part belongs to the ADA4938 family of ultralow distortion differential amplifiers manufactured by Analog Devices Inc. using a proprietary third-generation high-voltage XFCB process. The dual-channel variant complements the single-channel ADA4938-1, offering identical electrical performance in a 24-lead LFCSP package optimized for PCB layout and minimal distortion.

Replacement Considerations

The ADA4938-2YCPZ-R2 is listed as discontinued in distributor records. Designers should evaluate the ADA4940-2 as a potential replacement, noting differences in supply voltage ranges and noise characteristics. Verify pin compatibility and thermal performance before substituting.