ADR443ARZ-REEL7

Overview

The ADR443ARZ-REEL7 is a precision voltage reference from Analog Devices, utilizing XFET technology to deliver ultralow noise and high accuracy. It provides a fixed 3.0 V output with an initial accuracy of ±0.13% (A Grade) and a temperature coefficient of 10 ppm/°C. The device operates within a supply voltage range of 3.5 V to 18 V, requiring only 500 mV of headroom. It features a quiescent current of 3.75 mA and can source up to 10 mA while sinking up to -5 mA. Noise performance is specified at 1.4 µV p-p over the 0.1 Hz to 10 Hz band. The component is housed in an 8-lead SOIC package and functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• XFET technology minimizes voltage change versus temperature nonlinearity for superior stability.
• Capable of sourcing 10 mA and sinking 5 mA output currents for flexible load driving.
• Includes a dedicated TRIM pin allowing output voltage adjustment over a 0.5% range without compromising performance.
• Operates with low dropout voltage, requiring only 500 mV of supply voltage headroom.

Applications

• Precision data acquisition systems
• High resolution data converters
• Battery-powered instrumentation
• Portable medical instruments
• Industrial process control systems

Procurement Notes

Verify the specific grade (A or B) required for your application, as the datasheet distinguishes between 10 ppm/°C and 3 ppm/°C temperature coefficients. Confirm that the REEL7 suffix matches your automated assembly requirements against the standard tube packaging options available for the same electrical specifications. Ensure input voltage constraints align with the minimum 3.5 V requirement for stable operation.

Selection Notes

Select this component when ultralow noise and high precision are critical for signal integrity. The ADR443 variant is specifically designed for applications requiring a 3.0 V reference level. Consider the trim capability if system-level calibration is necessary to offset initial accuracy errors. Evaluate thermal resistance and power dissipation limits if operating near maximum load currents or ambient temperatures.

Part Context

This part belongs to the ADR440/ADR441/ADR443/ADR444/ADR445 family of XFET voltage references. These devices share common architectural features, including low dropout operation and high output drive capabilities. The family covers various fixed output voltages ranging from 2.048 V to 5.0 V, all offering similar noise profiles and temperature stability characteristics suitable for demanding analog signal processing tasks.

Replacement Considerations

Public confirmed substitute part numbers: ADR4530ARZ.