ADA4805-1ARJZ-R7

Overview

The ADA4805-1ARJZ-R7 is a high-speed voltage feedback, rail-to-rail output amplifier manufactured by Analog Devices Inc. It features an exceptionally low quiescent current of 500 µA per amplifier and operates over a wide supply range from ±1.5 V to ±5 V or single 3 V and 5 V supplies. The device offers a −3 dB bandwidth of 105 MHz at a gain of +1, a slew rate of 160 V/µs, and a maximum input offset voltage of 125 µV with a typical drift of 0.2 µV/°C. A dedicated shutdown pin allows the supply current to be reduced to approximately 3 µA, enabling dynamic power management with a fast turn-on time of 3 µs.

Feature Summary

• Features a dedicated shutdown pin that reduces quiescent supply current to approximately 3 µA for dynamic power scaling applications.
• Utilizes proprietary XFCB process technology to achieve low voltage noise density of 5.9 nV/√Hz and low current noise density of 0.6 pA/√Hz.
• Provides rail-to-rail output swing and supports an input common-mode range extending below the negative supply rail.

Applications

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

Procurement Notes

Verify the specific package type and ordering suffix against the manufacturer's official documentation before procurement. Confirm that the component meets the required industrial temperature range specifications. Ensure compatibility with the intended supply voltage conditions and load requirements. Cross-reference the datasheet revision history to validate parameter accuracy for the specific manufacturing lot.

Selection Notes

Select this component when designing circuits requiring both high speed and ultralow power consumption. The device is suitable for driving successive approximation register (SAR) ADCs where dynamic power scaling is necessary between sampling intervals. Consider the available packaging options, such as the 6-lead SOT-23, to fit space-constrained designs while maintaining thermal performance within specified limits.

Part Context

This part belongs to the ADA4805 family of amplifiers, which includes dual-channel variants like the ADA4805-2. The family is designed for applications demanding high bandwidth and low noise in battery-operated environments. The ADA4805-1 specifically provides a single amplifier channel, making it ideal for differential signal conditioning or standalone buffering tasks in portable electronic devices.

Replacement Considerations

The ADA4805-2 serves as the dual-channel counterpart within the same product family. Designers requiring multiple channels should evaluate the ADA4805-2 for potential system-level integration benefits while maintaining identical electrical characteristics and performance profiles.