MCP1501-18E/SN

Overview

The MCP1501-18E/SN is a buffered voltage reference from Microchip Technology, housed in an 8-lead SOIC package. It provides a fixed output of 1.8 V with an initial accuracy of ±0.1%. The device operates within an input voltage range of 2.0 V to 5.5 V and supports a maximum load current of ±20 mA. Key electrical parameters include a maximum temperature coefficient of 50 ppm/°C across the -40°C to +125°C operating range, a typical supply current of 140 μA, and a shutdown current of 205 nA.

Feature Summary

• Features a low-drift band gap architecture utilizing chopper-based amplifiers to minimize drift and offset errors.
• Includes a dedicated digital shutdown pin for active power management and energy conservation.
• Provides high drive capability capable of sourcing and sinking up to 20 mA of load current.

Applications

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

Procurement Notes

Verify that the ordering suffix 'SN' corresponds to the 8-lead SOIC package configuration. Confirm the 'E' designation indicates the extended industrial temperature range (-40°C to +125°C). Ensure the specific voltage variant matches the required 1.8 V output specification for the target circuit design.

Selection Notes

Select this component when a stable 1.8 V reference is needed with moderate drive strength. The 8-lead SOIC package offers distinct OUT and FEEDBACK pins, allowing separate routing to compensate for PCB trace impedance. This feature is advantageous for maintaining accuracy under varying load conditions compared to packages with internal feedback connections.

Part Context

This part belongs to the MCP1501 family of high-precision buffered voltage references. While other variants in the series offer different fixed voltages or automotive qualification (AEC-Q100) in SOT-23 packages, the MCP1501-18E/SN specifically targets general-purpose industrial applications requiring a 1.8 V output in a surface-mount SOIC form factor.

Replacement Considerations

Direct substitutes within the same family include MCP1501-12E/SN (1.25 V), MCP1501-20E/SN (2.048 V), and MCP1501-25E/SN (2.5 V). These parts share identical pinouts and electrical characteristics but differ only in their nominal output voltage levels.

FAQ

How does the MCP1501-18E/SN handle output noise?

The device utilizes a chopper-based amplifier architecture to reduce low-frequency noise and offset drift. For similar 1.024V variants, the output noise is specified at 30 µVRMS over the 0.1 Hz to 10 kHz bandwidth.

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 fully powered up before this feature can be utilized effectively.