AD8642ARMZ-R2

Overview

The AD8642ARMZ-R2 is a dual-channel, low-power precision JFET input operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output capability and unity-gain stability without phase reversal. The device operates on single supplies from 5 V to 26 V or dual supplies from ±2.5 V to ±13 V. Key electrical specifications include a maximum supply current of 250 µA per amplifier, a maximum input bias current of 1 pA, and a maximum offset voltage of 750 µV. It has a gain bandwidth product of 3 MHz and a slew rate of 2 V/µs at 5 V supply. The component is housed in an 8-lead Mini Small Outline Package (MSOP) and is rated for operation between -40°C and +125°C.

Feature Summary

• JFET input architecture providing extremely low input bias current
• Rail-to-rail output swing capability suitable for buffering wide-swing devices
• Unity-gain stable with no phase reversal during signal transitions
• Capable of driving capacitive loads exceeding 500 pF while maintaining stability

Applications

• Photodiode amplifiers
• Precision current sensing
• Medical instrumentation
• Battery-powered instruments
• Industrial controls

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure the procurement matches the required RoHS compliance status indicated by the 'Z' suffix. Confirm that the source material explicitly supports the requested quantity and packaging format before finalizing orders.

Selection Notes

Select this component when designing circuits requiring low power consumption alongside high DC precision. The JFET input stage is optimal for applications demanding minimal input bias current. Verify that the system supply voltage falls within the specified 5 V to 26 V range and that the operating temperature requirements align with the extended industrial limits.

Part Context

This part belongs to the AD8641/AD8642/AD8643 family of low-power, precision amplifiers. While sharing core electrical characteristics such as low offset voltage and rail-to-rail output, the AD8642 specifically integrates two independent channels within an 8-lead MSOP package. This configuration distinguishes it from the single-channel AD8641 and the quad-channel AD8643.

Replacement Considerations

The AD8642ARZ serves as a pin-compatible alternative utilizing an 8-lead SOIC package instead of the MSOP form factor.