ADA4805-1ARJZ-R2

Overview

The ADA4805-1ARJZ-R2 is a single-channel, high-speed voltage feedback operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output capability and operates within a supply voltage range of 2.7 V to 10 V. Key electrical parameters include a −3 dB bandwidth of 105 MHz at a gain of +1, a slew rate of 160 V/µs, and a settling time to 0.1% of 35 ns. The device exhibits low input offset voltage (maximum 125 µV) and exceptionally low offset drift (typical 0.2 µV/°C). Quiescent current is specified at 500 µA per amplifier in enabled mode, reducing to 2.9 µA when the shutdown pin is activated. Noise performance includes an input voltage noise density of 5.9 nV/√Hz at 100 kHz.

Feature Summary

• Features dynamic power scaling via an active-low shutdown pin that reduces quiescent current significantly while maintaining fast turn-on times for ADC driver applications.
• Provides rail-to-rail output swing with wide common-mode input range extending slightly below the negative supply rail.
• Delivers high-speed performance including 105 MHz bandwidth and 160 V/µs slew rate despite ultralow supply current consumption.

Applications

• High resolution, high precision analog-to-digital converter (ADC) drivers
• Battery-powered instrumentation systems
• Micropower active filters
• Portable point-of-sale terminals
• Active RFID readers

Procurement Notes

Verify the specific package variant against the datasheet ordering guide, as the ARJZ suffix corresponds to the 6-lead SOT-23 package. Confirm the revision status of the component, as manufacturing updates may affect pinout or thermal characteristics. Ensure compatibility with the intended supply voltage range of 2.7 V to 10 V during system design validation.

Selection Notes

Select this component for applications requiring a balance between high speed and low power consumption. The inclusion of a shutdown pin makes it suitable for battery-operated devices where dynamic power management is critical. Consider the 6-lead SOT-23 packaging constraints regarding thermal dissipation and board space when integrating into compact designs.

Part Context

This part belongs to the ADA4805 family of low-power, high-speed amplifiers from Analog Devices. The family utilizes proprietary XFCB process technology to achieve low noise and low current simultaneously. While the ADA4805-1 is a single-channel device, the family also includes dual-channel variants like the ADA4805-2, which share similar electrical characteristics but differ in package options such as MSOP or LFCSP.

Replacement Considerations

Direct functional replacements within the same family include the ADA4805-1ARJZ-R7, which shares identical electrical specifications but differs in reel packaging quantity. Verify pinout compatibility if substituting with other single-channel op-amps, as package variations exist across the product line.