MCP1502T-18E/CHY

Overview

The MCP1502T-18E/CHY is a buffered voltage reference from Microchip Technology, providing a nominal output of 1.800 V with an initial accuracy of 0.1%. It operates within a supply voltage range of 2.0 V to 5.5 V and delivers up to ±20 mA of load current. The device features a maximum temperature coefficient of 7 ppm/°C across the -40°C to +125°C operating range. Typical supply current is 140 µA, while shutdown current is 20 nA. It utilizes a chopper-based amplifier architecture for low noise and drift.

Feature Summary

• Chopper-based amplifier architecture reduces drift to near zero and improves long-term stability.
• Capable of sourcing and sinking 20 mA of output current for driving demanding loads.
• Integrated digital controls and calibrations ensure high precision and curvature compensation.

Applications

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

Procurement Notes

Verify the specific suffix 'CHY' corresponds to the SOT-23-6 package and tape-and-reel configuration as documented in the official datasheet. Confirm that the 'E' designation aligns with the specified industrial temperature range requirements for your application environment before finalizing procurement orders.

Selection Notes

Select this component when a stable 1.8 V reference with moderate drive capability is required. Ensure the input supply voltage remains above the minimum threshold of 2.0 V to maintain regulation. Consider the thermal resistance characteristics if significant load currents are applied to manage self-heating effects on output accuracy.

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 device is AEC-Q100 qualified for automotive applications, ensuring reliability in harsh environments compared to standard commercial grade components.

Replacement Considerations

The MCP1502T-18E/CHY can be functionally replaced by other variants within the MCP1502 series offering different voltage outputs, provided the system design accommodates the new reference level. Cross-reference with MCP1501 series only if lower current requirements allow for potential pin-compatible substitution without performance degradation.

FAQ

What is the minimum supply voltage required for the MCP1502T-18E/CHY?

The minimum supply voltage (VDD) required for proper operation of the MCP1502T-18E/CHY is 2.0 V.

How does the shutdown pin function on this device?

The SHDN pin is active-low. When driven low, it places the device in a shutdown state where the output is tri-stated. The device must be fully powered up before using this feature.