ADA4938-1ACPZ-R2

Overview

The ADA4938-1ACPZ-R2 is a single-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 amplifier. Key electrical parameters include a typical offset voltage of 1 mV, input voltage noise of 2.6 nV/√Hz, and second harmonic distortion of -106 dBc at 10 MHz. It is housed in a 16-lead LFCSP package.

Feature Summary

• Internal common-mode feedback loop provides exceptional output balance and suppresses even-order harmonic distortion products.
• Supports full differential and single-ended-to-differential gain configurations using a simple external four-resistor feedback network.
• Output common-mode voltage is adjustable over a wide range to match the input requirements of high-performance ADCs.

Applications

• ADC drivers
• Single-ended-to-differential converters
• IF and baseband gain blocks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and reel specifications. Ensure the component matches the required industrial temperature range and pinout configuration for the target application design.

Selection Notes

Select this component for applications requiring high-speed signal conversion with minimal distortion. Consider the adjustable output common-mode voltage and low noise characteristics when interfacing with high-resolution analog-to-digital converters in data acquisition systems.

Part Context

This part belongs to the ADA4938 family of ultralow distortion differential amplifiers manufactured by Analog Devices Inc. The series includes single-channel (ADA4938-1) and dual-channel (ADA4938-2) variants, all fabricated using a proprietary third-generation high-voltage XFCB process to achieve superior dynamic performance.

Replacement Considerations

The ADA4938-1ACPZ-RL is a verified alternative within the same product family offering identical electrical specifications and functionality.

FAQ

How is the closed-loop gain determined?

The closed-loop gain is determined by a simple external feedback network consisting of four resistors.

What is the function of the internal common-mode feedback loop?

The internal common-mode feedback loop provides exceptional output balance and suppresses even-order harmonic distortion products.