ADR827ARMZ-R2

Overview

The ADR827ARMZ-R2 is a low-power precision reference and operational amplifier integrated in a 10-lead MSOP package. It features an on-board 1.25 V voltage reference with ±0.4% initial accuracy and a maximum temperature coefficient of 30 ppm/°C. The device operates from −40°C to +125°C with a supply range of 2.7 V to 15 V. The amplifier section provides rail-to-rail input and output capabilities, a maximum offset voltage of 500 μV, and a bias current of 50 nA. Total supply current is less than 400 μA.

Feature Summary

• Combines a precision voltage reference and a unity-gain stable op amp in a single compact package.
• Features on-board precision resistors for flexible circuit configurations.
• Supports dual-supply operation with rail-to-rail input and output swing.
• Designed for applications requiring high precision and minimal power consumption.

Applications

• Battery-powered instrumentation
• Portable medical instrumentation
• Data acquisition systems
• Industrial process controls
• Automotive applications

Procurement Notes

Verify the specific ordering suffix R2 against official documentation to confirm the reel quantity and branding code. Ensure the component meets RoHS compliance requirements for your manufacturing process. Cross-reference the pinout and thermal resistance specifications during PCB layout to ensure proper heat dissipation and electrical connectivity.

Selection Notes

Select this component when a combined reference and amplifier solution is required to save board space. The ADR827 offers a 1.25 V reference output, suitable for generating higher voltages using the internal op amp. Consider the ADR821 if a 2.5 V reference is preferred. Evaluate the 30 ppm/°C drift specification against system accuracy requirements.

Part Context

This part belongs to the ADR821/ADR827 family from Analog Devices, designed to integrate a precision reference with an operational amplifier. The series targets low-power applications where space is limited. The ADR827 variant specifically provides a 1.25 V reference output, distinguishing it from the 2.5 V output of the ADR821 model within the same package and feature set.

Replacement Considerations

ADR821ARMZ-R2

FAQ

What is the function of pins 2 and 9?

Pins 2 (R1) and 9 (R2) are connections for the on-board precision resistors, which are tied to the positive input of the amplifier to facilitate gain setting or reference buffering configurations.

Can the reference and amplifier sections operate independently?

Yes, the datasheet states that the reference and the op amp can be operated independently, offering flexibility in arranging the combination for various circuit needs.

What is the dropout voltage characteristic of the reference section?

The dropout voltage is specified as 1.45 V at zero load current, meaning the minimum supply voltage must exceed the reference output by this amount for regulation.