MCP1502T-12E/CHY

Overview

The MCP1502T-12E/CHY is a buffered voltage reference from Microchip Technology featuring a 1.25 V nominal output with 0.1% initial accuracy and a maximum temperature coefficient of 7 ppm/°C across the -40°C to +125°C range. It operates on supply voltages between 1.65 V and 5.5 V, drawing a typical current of 140 µA. The device utilizes chopper-based amplifiers for low drift and can source or sink up to 20 mA. Packaged in a 6-lead SOT-23, it includes an active-low shutdown pin.

Feature Summary

• Chopper-based amplifier architecture reduces drift to near zero
• Capable of sourcing and sinking 20 mA load currents
• Active-low digital shutdown control for power management
• Second-order curvature compensated band gap design

Applications

• Precision data acquisition systems
• High-resolution analog-to-digital converter references
• Electric vehicle battery management systems
• Medical equipment applications
• Industrial controls

Procurement Notes

Verify the specific suffix 'CHY' against official documentation to confirm package type and tape-and-reel specifications. Ensure the operating environment remains within the specified -40°C to +125°C range. Confirm that input voltage stays above the minimum requirement of 1.65 V for proper regulation. Check for AEC-Q100 qualification if automotive compliance is required.

Selection Notes

Select this component when a stable 1.25 V reference is needed with high precision and moderate drive capability. Consider the 7 ppm/°C temperature coefficient for thermal stability requirements. Evaluate the 140 µA quiescent current for battery-powered designs. Compare against the MCP1501 if higher precision or different packaging is preferred.

Part Context

This part belongs to the MCP1502 family of buffered voltage references. It shares architectural similarities with other members like the MCP1502T-40E/CHY but provides a distinct 1.25 V output level. The family is designed for applications requiring low noise and high accuracy in compact surface-mount packages.

Replacement Considerations

The MCP1501 series offers similar functionality with potentially different accuracy grades. Verify pin compatibility and output voltage matching before substitution. Ensure the replacement supports the required 20 mA drive current and operates within the same supply voltage range.