MCP1501T-18E/SN

Overview

The MCP1501T-18E/SN is a buffered voltage reference from Microchip Technology. It provides a fixed output of 1.8V with an initial accuracy of ±0.1%. The device operates within a supply voltage range of 2.0V to 5.5V and maintains a maximum temperature coefficient of 50 ppm/°C across the -40°C to +125°C operating range. It features a typical operating current of 140 μA and can source or sink up to 20 mA. The component is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes a low-drift band gap architecture with chopper-based amplifiers to minimize drift and offset.
• Capable of sourcing and sinking 20 mA of load current for high-drive applications.
• Includes a dedicated shutdown pin for digital control of power consumption.

Applications

• Precision data acquisition systems
• High-resolution data converters
• Medical equipment applications

Procurement Notes

Verify the specific suffix 'SN' confirms the 8-lead SOIC package, as other suffixes indicate different form factors like SOT-23. Ensure the 'T' designation aligns with reel packaging requirements if applicable to the manufacturing process. Confirm RoHS compliance status through official documentation before finalizing procurement specifications.

Selection Notes

Select this variant when a stable 1.8V reference is required with high drive capability. The 8-lead SOIC package offers distinct feedback and output pins to mitigate PCB trace impedance effects. Consider the minimum supply voltage requirement of 2.0V to ensure proper regulation under all operating conditions.

Part Context

This component belongs to the MCP1501 family of high-precision buffered voltage references. The family includes multiple voltage options ranging from 1.024V to 5.000V. While some variants are AEC-Q100 qualified in specific packages, the 8-lead SOIC version is designed for general industrial and commercial precision applications requiring low noise and stability.

Replacement Considerations

Direct substitutes include other MCP1501 variants with different output voltages (e.g., MCP1501-25E/SN) if voltage adjustment is acceptable. Cross-family replacements require verification of pin compatibility and electrical performance parameters against the original datasheet specifications.

FAQ

How does the 8-lead SOIC package handle feedback?

The SOIC package provides separate OUT and FEEDBACK pins. These must be connected externally on the PCB to close the feedback loop, allowing for compensation of trace resistance.

What is the function of the SHDN pin?

The SHDN pin is a digital input that places the device into a low-power shutdown mode when driven low. The device must be powered up before this feature can be utilized effectively.