ADA4895-2ARMZ-RL

Overview

The ADA4895-2ARMZ-RL is a dual high-speed voltage feedback amplifier manufactured by Analog Devices Inc. It features a gain-bandwidth product exceeding 1.5 GHz, a slew rate of 943 V/µs, and a settling time to 0.1% of 22 ns. The device operates with a supply range of 3 V to 10 V and draws a quiescent current of 3 mA per amplifier. It provides rail-to-rail output swing and includes a dedicated disable pin for power management.

Feature Summary

• High-speed voltage feedback architecture with low input noise
• Rail-to-rail output stage maximizing dynamic range
• Integrated disable feature for power control
• Stable operation at gains greater than or equal to 10

Applications

• Low noise preamplifier circuits
• Ultrasound amplifiers
• PLL loop filters
• High performance analog-to-digital converter (ADC) drivers
• Digital-to-analog converter (DAC) buffers

Procurement Notes

Verify the specific package type matches the design requirements, as the ADA4895 series is available in multiple packages including MSOP and SOIC. Confirm that the application circuit maintains a closed-loop gain of at least +10 to ensure stability, as this device is not unity-gain stable. Check the disable pin logic levels against the system voltage rails to ensure proper activation and deactivation states.

Selection Notes

Select this component when high bandwidth and low noise are required without sacrificing power efficiency. It is suitable for applications needing rail-to-rail output swing on single or dual supplies. Designers must account for the minimum gain requirement of +10; if lower gains are necessary, consider the ADA4897 family which offers unity-gain stability.

Part Context

This part belongs to the ADA4895 series of low-power, high-speed operational amplifiers. It utilizes Analog Devices' proprietary SiGe bipolar process to achieve high performance with low power consumption. The dual configuration allows for cost-effective implementation of differential signal chains or dual-channel processing within a compact 10-lead MSOP package.

Replacement Considerations

For designs requiring unity-gain stability, the ADA4897-2 is the recommended alternative within the same family. Other companion products include the ADA4896-2 and ADA4898-2, though specifications such as bandwidth and supply voltage ranges differ.