ADA4927-2YCPZ-R2

Overview

The ADA4927-2YCPZ-R2 is a dual-channel, ultralow distortion current feedback differential amplifier designed to drive high-performance analog-to-digital converters (ADCs) with resolutions up to 16 bits. Operating from DC to 100 MHz, it features a 2.3 GHz small-signal bandwidth and a 5000 V/µs slew rate. The device utilizes an internal common-mode feedback loop for exceptional output balance and even-order harmonic suppression. It supports single-ended-to-differential or differential-to-differential configurations with externally adjustable gain via four resistors. Powered by a silicon-germanium complementary bipolar process, it offers low input voltage noise of 1.4 nV/√Hz and operates over a temperature range of −40°C to +105°C.

Feature Summary

• Current feedback architecture provides wide bandwidth and low distortion at higher gains compared to voltage feedback amplifiers.
• Internal common-mode feedback loop ensures exceptional output balance and suppresses even-order distortion products.
• Externally adjustable gain configuration allows stability and bandwidth control through external feedback resistors.
• Adjustable output common-mode voltage enables easy matching to required ADC input common-mode levels.

Applications

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

Procurement Notes

Verify the specific ordering suffix R2 corresponds to tape-and-reel packaging when sourcing. Confirm that the component matches the 24-lead LFCSP package dimensions and pinout defined in the official datasheet. Ensure compatibility with the specified operating temperature range and supply voltage requirements before integration into the design.

Selection Notes

Select this component for applications requiring high-speed signal conversion with minimal distortion. The dual-channel configuration is suitable for driving dual-channel ADCs or I/Q demodulation schemes. Consider the power consumption and thermal characteristics relative to the PCB layout capabilities. Verify that the feedback network components meet the stability requirements for the desired closed-loop gain.

Part Context

The ADA4927 series comprises single-channel (ADA4927-1) and dual-channel (ADA4927-2) variants fabricated using Analog Devices' silicon-germanium complementary bipolar process. This technology enables very low distortion and high-speed performance. The dual-channel version is optimized for driving dual-channel ADCs, offering matched gain and phase characteristics between channels.

Replacement Considerations

Direct substitutes include the ADA4927-1 for single-channel applications. Other members of the ADA4927 family may be considered if channel count or package differences are acceptable. Verify electrical specifications against the original design requirements when selecting alternatives.

FAQ

How does the current feedback architecture affect the bandwidth?

The current feedback architecture provides a loop gain that is nearly independent of the closed-loop gain, allowing the device to achieve wide bandwidth and low distortion even at higher gains.

What is the function of the VOCM pin?

The VOCM pin controls the internal common-mode feedback loop, allowing users to independently adjust the output common-mode voltage to match the input requirements of the connected ADC.

What type of process is used to manufacture the ADA4927?

The ADA4927 is fabricated using a silicon-germanium (SiGe) complementary bipolar process, which contributes to its low distortion and high-speed performance.