ADA4661-2ARMZ-R7

Overview

The ADA4661-2ARMZ-R7 is a dual precision CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates on supply voltages ranging from 3 V to 18 V with a maximum supply current of 725 µA per amplifier. The device offers a gain bandwidth product of 4 MHz, a slew rate of 2 V/µs, and an input offset voltage of 150 µV maximum at VSY/2. It utilizes DigiTrim technology for low offset and drift, ensuring high accuracy across the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes patented DigiTrim trimming technique to achieve exceptionally low input offset voltage and drift.
• Supports wide single-supply (3 V to 18 V) and dual-supply operation while maintaining rail-to-rail input and output swing.
• Provides high common-mode rejection ratio and power supply rejection ratio for stable performance in noisy environments.

Applications

• Current shunt monitors
• Active filters
• Portable medical equipment
• Buffer and level shifting circuits
• High impedance sensor interfaces

Procurement Notes

Verify the specific ordering suffix R7 corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm that the component meets all RoHS compliance standards applicable to your manufacturing region. Ensure the selected package variant matches the footprint specifications defined in the datasheet outline dimensions before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring both low power consumption and high precision within a wide voltage operating window. It is suitable for applications demanding rail-to-rail signal handling without sacrificing bandwidth or introducing significant offset errors. Consider its thermal resistance characteristics if operating near the upper limits of the specified temperature range.

Part Context

This part belongs to the ADA4661 family of precision amplifiers manufactured by Analog Devices Inc. It is specifically designed as a dual-channel solution optimized for battery-powered instrumentation and portable devices where power efficiency and signal integrity are critical design constraints.

Replacement Considerations

Refer to the manufacturer's official documentation for verified substitute part numbers. Cross-referencing should be performed based on pin compatibility, electrical specifications, and package dimensions to ensure functional equivalence in existing designs.

FAQ

How does the DigiTrim technique affect the offset voltage?

The DigiTrim technique allows the ADA4661-2 to achieve a maximum input offset voltage of 150 µV at VSY/2, providing higher precision compared to standard CMOS amplifiers without external trimming.

What is the input bias current specification?

The input bias current is typically 15 pA at 25°C, increasing to a maximum of 900 pA over the full operating temperature range of −40°C to +125°C.