ADR431BR-REEL7

Overview

The ADR431BR-REEL7 is a precision series voltage reference from the XFET family, manufactured by Analog Devices Inc. It provides a fixed output voltage of 2.500 V with an initial accuracy of ±1 mV (±0.04%). The device features a maximum temperature coefficient of 3 ppm/°C and operates within a supply voltage range of 4.5 V to 18 V. It draws a typical quiescent current of 800 µA and supports high output source and sink currents of 30 mA and -20 mA respectively. The unit is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes XFET technology for low noise performance without requiring external capacitors
• Includes a trim terminal allowing output voltage adjustment over a ±5% range
• Capable of sourcing up to 30 mA and sinking up to -20 mA load current
• Operates reliably across an extended industrial temperature range

Applications

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

Procurement Notes

Verify the specific suffix 'REEL7' indicates tape-and-reel packaging when ordering. Confirm that the B-grade designation corresponds to the required 3 ppm/°C temperature coefficient specification. Ensure the SOIC-8 package type matches the target PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when low noise and high accuracy are critical for 2.5 V reference applications. The B-grade variant offers superior temperature stability compared to the A-grade version. Consider the XFET architecture for lower noise density than traditional buried Zener references while maintaining low power consumption.

Part Context

This part belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 series of ultralow noise XFET voltage references. The ADR431 model specifically targets the 2.5 V output requirement. The REEL7 suffix denotes the reel packaging format used for automated surface-mount assembly processes.

Replacement Considerations

The ADR431ARZ serves as a tube-packaged alternative within the same electrical specifications. Other models in the ADR43x family may be considered if different output voltages or grade accuracies are acceptable.