ADR4540ARZ-R7

Overview

The ADR4540ARZ-R7 is a high-precision, low-power series voltage reference with a fixed output of 4.096 V. It features an initial accuracy of ±0.04% and a maximum temperature coefficient of 4 ppm/°C over the −40°C to +125°C range. The device operates on an input voltage from 4.2 V to 15 V, drawing a maximum quiescent current of 950 μA. It provides an output current capacity of +10 mA source and −10 mA sink, housed in an 8-lead SOIC package.

Feature Summary

• Ultra-low noise performance for signal integrity
• High initial accuracy and excellent thermal stability
• Low dropout voltage suitable for portable equipment

Applications

• Precision data acquisition systems
• High resolution data converters
• Industrial instrumentation
• Medical devices

Procurement Notes

Verify the specific grade suffix (e.g., ARZ) against the required temperature range and accuracy specifications. Confirm that the R7 tape and reel packaging matches the automated assembly requirements. Ensure the component meets RoHS compliance standards for the target market.

Selection Notes

Select this part when a stable 4.096 V reference is needed with strict limits on drift and noise. Consider the A grade for extended industrial temperature ranges. Evaluate the input voltage headroom relative to the minimum dropout requirement under load conditions.

Part Context

This component belongs to the ADR45xx family of ultralow noise voltage references. The family includes variants with different fixed output voltages such as 2.048 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V. All members share similar topology and performance characteristics regarding noise and power consumption.

Replacement Considerations

ADR4540BRZ offers higher accuracy at ±0.02%. ADR4540CRZ and ADR4540DRZ provide tighter temperature coefficients but are limited to the 0°C to +70°C range.