ADA4939-2YCPZ-R7

Overview

The ADA4939-2YCPZ-R7 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 channel. The device features a small-signal bandwidth of 1400 MHz at G = 2 and a slew rate of 6800 V/µs. It provides an input voltage noise density of 2.3 nV/√Hz and supports adjustable output common-mode voltage via an internal feedback loop. Packaged in a 24-lead LFCSP.

Feature Summary

• Internal common-mode feedback loop ensures exceptional output balance and suppresses even-order harmonic distortion without requiring tightly matched external components.
• Capable of converting single-ended signals to differential outputs or amplifying differential signals while maintaining stable operation for gains greater than or equal to two.
• User-adjustable output common-mode voltage allows precise matching to ADC input requirements across the specified operating temperature range.

Applications

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

Procurement Notes

Verify the specific suffix 'R7' corresponds to the reel packaging configuration required for automated assembly processes. Confirm that the 24-lead LFCSP footprint matches the target PCB layout guidelines provided in the datasheet outline dimensions. Ensure ESD precautions are observed during handling due to the sensitivity of the silicon-germanium process technology used in fabrication.

Selection Notes

Select this component when ultralow harmonic distortion and high speed are critical for signal integrity in data acquisition systems. The dual-channel architecture simplifies board space compared to using two single-channel devices. Verify that the required closed-loop gain meets the stability condition of being greater than or equal to two. Consider the thermal resistance characteristics if operating near maximum ambient temperatures.

Part Context

This part belongs to the ADA4939 family of differential amplifiers manufactured by Analog Devices Inc. utilizing proprietary silicon-germanium complementary bipolar process technology. The dual-channel variant, ADA4939-2, integrates two independent amplifiers within a compact 4 mm × 4 mm package. This series is engineered specifically for applications demanding high dynamic performance and low noise in broadband signal processing chains.

Replacement Considerations

ADA4939-1YCPZ-R7 serves as the single-channel equivalent within the same family.