MCP1501-12E/SN

Overview

The MCP1501-12E/SN is a buffered voltage reference from Microchip Technology, providing a fixed output of 1.25 V with an initial accuracy of 0.1%. It operates within a supply voltage range of 1.65 V to 5.5 V and supports a maximum load current of ±20 mA. The device features a low typical operating current of 140 μA and maintains a temperature coefficient of 50 ppm/°C across the -40°C to +125°C range. It utilizes chopper-based amplifiers to minimize drift and is housed in an 8-Lead SOIC package.

Feature Summary

• Buffered output capable of sourcing and sinking up to 20 mA of current for stable performance under varying loads.
• Chopper-based amplifier architecture effectively reduces temperature-dependent offsets and minimizes long-term drift.
• Integrated shutdown pin allows for digital control of power consumption by placing the device in a low-current state.

Applications

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

Procurement Notes

Verify that the specific suffix 'SN' corresponds to the 8-Lead SOIC package configuration as documented in the official datasheet. Confirm that the 'E' designation aligns with the specified industrial temperature range requirements for your application environment. Ensure compatibility with the required input voltage levels before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 1.25 V reference with high precision is required. The buffered output eliminates the need for external op-amps in many scenarios, simplifying the design. Consider the 140 μA quiescent current for battery-powered applications where power efficiency is critical alongside accuracy.

Part Context

This part belongs to the MCP1501 series of high-precision buffered voltage references. The family offers multiple voltage variants ranging from 1.024 V to 5.000 V. While other packages like SOT-23 and WDFN are available, the SOIC variant provides standard surface-mount integration suitable for general-purpose PCB layouts.

Replacement Considerations

The MCP1501-12E/SN may be replaced by other members of the MCP1501 family if different voltage outputs are acceptable. Verify pinout compatibility and thermal characteristics when substituting with alternative package types such as WDFN or SOT-23.

FAQ

How does the MCP1501 handle capacitive loads?

The device can drive up to 10 nF of capacitive load directly. For larger capacitors, a series resistor must be used to maintain stability, as detailed in the transient response graphs.

What is the function of the FEEDBACK pin on the SOIC package?

The FEEDBACK pin connects to the buffer amplifier feedback loop. On the SOIC package, it should be connected to the OUT pin at the device to ensure accurate output voltage regulation.