MCP1502T-20E/CHY

Overview

The MCP1502T-20E/CHY is a buffered voltage reference with a nominal output of 2.048 V and an initial accuracy of 0.1%. It operates within a supply voltage range of 2.25 V to 5.5 V, drawing a typical current of 140 µA. The device features a maximum temperature coefficient of 7 ppm/°C across the -40°C to +125°C operating range. It provides ±20 mA load current capability and includes a digital shutdown pin.

Feature Summary

• Utilizes chopper-based amplifiers in a band gap architecture to minimize drift and offset errors.
• Capable of sourcing and sinking up to 20 mA of load current for direct drive applications.
• Includes a dedicated active-low shutdown pin for system power management.

Applications

• Precision data acquisition systems
• Electric vehicle battery management systems
• High-resolution data converters
• Medical equipment applications

Procurement Notes

Verify that the specific suffix CHY corresponds to the SOT-23-6 package configuration. Confirm the E designation aligns with the required industrial temperature range specifications. Ensure the ordering code matches the exact 2.048 V output variant to prevent functional mismatches in precision circuits.

Selection Notes

Select this component when a low-drift, high-current buffered reference is required. The 2.048 V output is optimal for interfacing with ADCs utilizing binary-weighted reference ranges. Consider the 140 µA quiescent current for battery-powered designs requiring extended operational life without sacrificing regulation performance.

Part Context

This part belongs to the MCP1502 family of high-precision buffered voltage references. It shares architectural similarities with the MCP1501 but offers higher output current capabilities. The T-20 suffix specifically denotes the 2.048 V output voltage option within the broader product line.

Replacement Considerations

MCP1502T-20E/MF

FAQ

How does the MCP1502 achieve its low temperature coefficient?

The device employs a second-order temperature compensated band gap circuit combined with chopper-based amplifiers to effectively reduce drift to near zero.

What is the function of the SHDN pin?

The SHDN pin is an active-low digital input that places the device into a shutdown state, tri-stating the output driver to conserve power.