ADR435BRZ

Overview

The ADR435BRZ is a precision series voltage reference from the Analog Devices XFET family, providing a fixed 5.000 V output with an initial accuracy of ±2 mV (±0.04%) and a maximum temperature coefficient of 3 ppm/°C. It operates within a supply voltage range of 7.0 V to 18 V, requiring only 2 V of headroom. The device draws a typical quiescent current of 800 µA and supports high output currents of +30 mA sourcing and −20 mA sinking. It features ultralow noise performance of 8 µV p-p in the 0.1 Hz to 10 Hz band and includes a trim terminal for fine-tuning.

Feature Summary

• Utilizes patented XFET technology with temperature drift curvature correction to minimize nonlinearity.
• Capable of sourcing up to 30 mA and sinking up to -20 mA without external components.
• Includes a dedicated TRIM pin allowing output voltage adjustment over a ±5% range.
• Operates with low supply voltage headroom requirements compared to buried Zener references.

Applications

• Precision data acquisition systems
• High resolution data converters
• Medical instruments
• Industrial process control systems

Procurement Notes

Verify that the specific order suffix matches the required packaging format, as standard tube variants differ from reel options. Confirm the B-grade designation aligns with the required 3 ppm/°C temperature coefficient specification. Ensure the SOIC-8 package type corresponds to the PCB footprint design constraints before finalizing procurement.

Selection Notes

Select this component when a stable 5 V reference is needed with minimal noise and high drive capability. The wide input voltage range accommodates various system supplies, while the low headroom requirement allows operation closer to the output voltage than traditional references. Consider the trim feature if precise calibration against system tolerances is necessary.

Part Context

This part belongs to the ADR43x series of ultralow noise XFET voltage references. It shares core architectural features with models like the ADR430, ADR431, ADR433, and ADR434, differing primarily in its fixed 5.0 V output voltage and specific operating input range starting at 7.0 V.

Replacement Considerations

ADR435ARZ

FAQ

What is the function of Pin 5?

Pin 5 is the TRIM terminal, which allows the user to adjust the output voltage over a ±5% range without compromising performance.

How does the ADR435 handle load regulation?

The device maintains a load regulation of 15 ppm/mA across the specified operating temperature range.