MCP1501T-12E/RW

Overview

The MCP1501T-12E/RW is a buffered voltage reference from Microchip Technology, offering 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 features a maximum temperature coefficient of 50 ppm/°C across the -40°C to +125°C operating range. The device draws a typical supply current of 140 μA and can source or sink up to 20 mA. Packaged in an 8-WDFN (2x2) format, it includes a shutdown pin for power management.

Feature Summary

• Utilizes a chopper-based amplifier architecture to minimize drift and offset errors.
• Capable of sourcing and sinking 20 mA of load current.
• Includes a digital shutdown pin for low-power control.

Applications

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

Procurement Notes

Verify the specific suffix 'RW' corresponds to the WDFN-8 tape-and-reel packaging configuration. Confirm that the 'E' grade meets the required ±0.1% initial accuracy specifications. Ensure the design accommodates the 1.65 V minimum input voltage requirement for proper operation at the 1.25 V output level.

Selection Notes

Select this component when a stable 1.25 V reference is needed with high precision and low noise. The WDFN package suits space-constrained designs. Consider the 140 μA quiescent current for battery-powered applications. Verify thermal performance requirements given the exposed pad design for heat dissipation.

Part Context

This part belongs to the MCP1501 family of high-precision buffered voltage references. The series offers multiple voltage options ranging from 1.024 V to 5.000 V. The T suffix indicates reel packaging, while RW specifies the 8-WDFN form factor. The E grade denotes the standard accuracy tier within the product line.

Replacement Considerations

Direct substitutes include other MCP1501 variants with different output voltages if system requirements change. For automotive applications, verify AEC-Q100 qualification status as it varies by package type; the SOT-23 package is explicitly qualified, whereas WDFN qualification should be confirmed via official documentation.

FAQ

How does the shutdown pin function?

The SHDN pin is active-low. When driven low, it places the device in shutdown mode, disabling the output. The device must be fully powered up before using this feature.

What is the purpose of the FEEDBACK pin on the WDFN package?

On the WDFN and SOIC packages, the FEEDBACK pin allows for remote sensing. Connecting it near the load point compensates for trace impedance and IR-drop effects between the device and the load.