ADA4895-1ARZ-R7

Overview

The ADA4895-1ARZ-R7 is a single-channel, high-speed voltage feedback operational amplifier manufactured by Analog Devices Inc. It features a gain-bandwidth product exceeding 1.5 GHz and a slew rate of 943 V/µs. The device operates on a supply voltage range of 3 V to 10 V with a quiescent current of 3 mA per amplifier. Key electrical parameters include an input offset voltage of 53 µV, an open-loop gain of 110 dB, and a common-mode rejection ratio of -110 dB. It provides rail-to-rail output swing and supports up to 80 mA of linear output current.

Feature Summary

• Utilizes proprietary SiGe bipolar process for low noise and high speed
• Features rail-to-rail output stage for maximum dynamic range
• Includes a dedicated disable pin for power management
• Stable at gains greater than or equal to 10

Applications

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

Procurement Notes

Verify the specific package type against the datasheet, as the ADA4895-1 series includes both 8-lead SOIC and 6-lead SOT-23 options. Confirm that the 'R7' suffix corresponds to the required reel packaging format. Ensure the component meets the extended industrial temperature range requirements of -40°C to +125°C for your specific application environment.

Selection Notes

Select this amplifier when a gain stability of 10 or higher is acceptable in the circuit design. It is suitable for applications requiring low wideband noise and high slew rates within a compact footprint. Consider the ADA4897-1 if unity-gain stability is required instead of the G ≥ 10 stability provided by the ADA4895-1.

Part Context

This component belongs to the ADA4895 family of low-power, high-speed amplifiers. It shares core specifications with the dual-channel ADA4895-2 but is configured as a single amplifier. The device is designed to complement high-resolution ADCs such as the AD7944 and AD7985 series, providing necessary signal conditioning in precision data acquisition systems.

Replacement Considerations

The ADA4897-1 serves as a functional substitute where unity-gain stability is required, offering similar bandwidth and noise characteristics.