MCP1502T-12E/CHYVAO

Overview

The MCP1502T-12E/CHYVAO is a buffered voltage reference with an output of 1.25V, housed in a 6-lead SOT-23 package. It operates within a supply voltage range of 1.65V to 5.5V and maintains an operating temperature range from -40°C to +125°C. The device features a maximum temperature coefficient of 7 ppm/°C and an initial accuracy of 0.1%. Typical operating current is 140 µA, with a shutdown current of 20 nA. It supports sourcing and sinking up to 20 mA of load current.

Feature Summary

• Utilizes chopper-based amplifier architecture to minimize drift and reduce low-frequency noise.
• Incorporates second-order curvature compensation for high precision across the full temperature range.
• Provides active shutdown control via an active-low digital input pin.

Applications

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

Procurement Notes

Verify the specific suffix CHYVAO against official Microchip documentation to confirm tape-and-reel packaging and automotive qualification status. Ensure the ordering code matches the required 1.25V variant. Confirm RoHS compliance details directly with the manufacturer's latest datasheet revision before finalizing procurement specifications.

Selection Notes

Select this component when a stable 1.25V reference is required for automotive or industrial environments. The SOT-23 package suits space-constrained designs. Verify that the minimum supply voltage of 1.65V aligns with the system power rails. Consider the 140 µA quiescent current for battery-powered applications requiring extended operational life.

Part Context

This part belongs to the MCP1502 family of buffered voltage references. It shares architectural similarities with the MCP1501 but offers enhanced performance characteristics including lower temperature coefficients and higher drive capabilities. The family provides multiple voltage options ranging from 1.024V to 5.000V within the same package footprint.

Replacement Considerations

MCP1502T-12E/CHY

FAQ

How does the MCP1502 achieve its low temperature coefficient?

The device uses a band gap circuit based on second-order temperature compensation 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 low-power shutdown state, tri-stating the output driver.