ADA4939-2YCPZ-R2

Overview

The ADA4939-2YCPZ-R2 is a dual-channel, ultralow distortion differential amplifier designed for driving high-performance analog-to-digital converters (ADCs). It operates on a single supply between 3.0 V and 5.25 V with a quiescent current of approximately 36.5 mA per amplifier. The device features a small-signal bandwidth of 1400 MHz at G = 2 and a slew rate of 6800 V/µs under 5 V operation. It provides an input voltage noise density of 2.3 nV/√Hz and supports gains stable for values greater than or equal to 2.

Feature Summary

• Internal common-mode feedback loop enables user-adjustable output common-mode voltage matching ADC inputs while suppressing even-order harmonic distortion.
• Fabricated using proprietary silicon-germanium complementary bipolar process to achieve extremely low harmonic distortion and minimal input voltage noise.
• Supports differential-to-differential or single-ended-to-differential configurations via simple external four-resistor feedback networks.

Applications

• Driving high-resolution ADCs up to 16 bits
• Single-ended-to-differential conversion
• IF and baseband gain blocks
• Differential buffers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with the required operating temperature range and supply voltage constraints before integration into the design.

Selection Notes

Select this component when ultralow distortion and high speed are critical for signal integrity in data acquisition systems. The dual-channel architecture allows for independent control of two channels within a single package, simplifying layout for balanced differential signals.

Part Context

This part belongs to the ADA4939 family of differential amplifiers from Analog Devices. It is the dual-channel variant housed in a 24-lead LFCSP package, complementing the single-channel ADA4939-1. The series is optimized for applications requiring precise common-mode control and high dynamic performance.

Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.

FAQ

How is the output common-mode voltage controlled?

The output common-mode voltage is controlled by an internal common-mode feedback loop that forces the output to match the voltage applied to the VOCM pin.

What is the minimum stable gain for this amplifier?

The amplifier is stable for differential gains greater than or equal to 2.