ADA4805-2ACPZ-R2

Overview

The ADA4805-2ACPZ-R2 is a dual-channel, high-speed voltage feedback operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail outputs and ultralow supply current of 500 µA per amplifier. The device offers a -3 dB bandwidth of 105 MHz at a gain of +1 and a slew rate of 160 V/µs. It includes a shutdown pin that reduces quiescent current to approximately 3 µA with a turn-on time of 3 µs. Operating over a supply range of 2.7 V to 10 V, it provides low noise (5.9 nV/√Hz) and low offset voltage drift (0.2 µV/°C typical).

Feature Summary

• Dual-channel architecture with rail-to-rail output capability.
• Ultralow power consumption with dynamic shutdown functionality.
• High-speed performance including 105 MHz bandwidth and 160 V/µs slew rate.
• Low input offset voltage drift for precision applications.

Applications

• High resolution, high precision analog-to-digital converter drivers
• Battery-powered instrumentation
• Micropower active filters
• Portable point of sales terminals

Procurement Notes

Verify the specific package type against the datasheet, as the R2 suffix typically denotes an 8-lead MSOP while other variants use LFCSP. Confirm the manufacturer part number matches official Analog Devices documentation. Ensure the component meets RoHS standards and industrial temperature ratings before integration into designs.

Selection Notes

Select this component for applications requiring both high speed and low power consumption. The dual configuration allows for cost-effective implementation in differential signal chains or multi-channel systems. Consider the shutdown feature for battery-operated devices requiring dynamic power management between sampling intervals.

Part Context

This device belongs to the ADA4805 family of low-power, high-speed amplifiers. It shares specifications with the single-channel ADA4805-1 but integrates two independent amplifiers in one package. The technology utilizes Analog Devices' proprietary XFCB process to achieve low noise and high bandwidth despite low quiescent currents.

Replacement Considerations

The ADA4805-2ACPZ-R7 is a direct replacement variant differing only in packaging format (LFCSP vs. MSOP). Other members of the ADA4805 series offer similar electrical characteristics but vary in channel count and package options.

FAQ

What is the maximum operating supply voltage?

The absolute maximum supply voltage rating is 11 V, though the recommended operating range extends up to 10 V.

How does the shutdown pin affect performance?

Driving the shutdown pin low powers down the amplifier, reducing quiescent current to approximately 3 µA. The turn-on time is 3 µs, allowing for fast recovery in dynamic power scaling applications.