ADA4897-2ARMZ-R7

Overview

The ADA4897-2ARMZ-R7 is a dual-channel, unity-gain stable, low noise, rail-to-rail output, high-speed voltage feedback amplifier manufactured by Analog Devices Inc. It operates on a supply voltage range of 3 V to 10 V with a quiescent current of 3 mA per amplifier. The device features a -3 dB bandwidth of 230 MHz at G = +1 and a slew rate of 120 V/μs. Input offset voltage is typically 28 μV with a maximum of 500 μV. It includes dedicated disable pins for each channel.

Feature Summary

• Features a low wideband noise density of 1 nV/√Hz and low 1/f noise of 2.4 nV/√Hz at 10 Hz.
• Provides rail-to-rail output swing capability across the full supply voltage range.
• Includes independent disable functionality for both amplifier channels to reduce power consumption.

Applications

• Low noise preamplifier circuits
• Ultrasound amplifiers
• High performance ADC drivers
• DAC buffers

Procurement Notes

Verify the specific package type and reel specifications against the manufacturer's ordering guide before procurement. Confirm that the disabled state logic aligns with system requirements, as the disable pin requires specific voltage thresholds relative to the supply rails to activate the low-power mode. Ensure ESD precautions are observed during handling.

Selection Notes

Select this component when a dual-channel configuration is required alongside low noise and high speed characteristics. The ADA4897-2 offers independent disable control compared to single-channel or non-disable variants. Consider the 10-lead MSOP package constraints and thermal dissipation limits if operating near maximum ambient temperatures or under heavy capacitive loads.

Part Context

This part belongs to the ADA4896-2/ADA4897-1/ADA4897-2 family of amplifiers fabricated on a proprietary SiGe bipolar process. While sharing core electrical specifications such as bandwidth and noise floor, the ADA4897-2 specifically provides two channels in a 10-lead MSOP package with integrated disable pins, distinguishing it from the single-channel ADA4897-1 and the non-disable ADA4896-2.

Replacement Considerations

The ADA4896-2 serves as a functional substitute if disable pins are not required. The ADA4897-1 is an alternative for single-channel applications. Verify pinout compatibility and package dimensions when substituting, as the ADA4897-2 utilizes a 10-lead MSOP footprint distinct from other family members.