LM4132EMF-2.5

Voltage Reference Overview

The LM4132EMF-2.5/NOPB is a precision series voltage reference manufactured by Texas Instruments, housed in a 5-pin SOT-23 package. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.5% and a temperature coefficient of 30 ppm/°C over the operating range. The device operates within an input voltage range of 2.9 V to 5.5 V and draws a typical supply current of 60 µA. It supports a maximum load current of 20 mA and features an enable pin for a low-power shutdown mode consuming only 3 µA.

Voltage Reference Feature Summary

• Utilizes EEPROM registers for curvature correction and package-level programming to maintain high accuracy despite assembly shifts.
• Features an integrated enable pin that allows switching between normal operation and a deep shutdown mode to conserve power.
• Capable of delivering up to 20 mA of output current without requiring an external buffer amplifier or output capacitor.

Voltage Reference Applications

• Data acquisition systems
• Portable battery-powered equipment
• Precision regulators

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and confirms the absence of halogenated flame retardants. Ensure the ordering code matches the required E-grade accuracy specifications. Confirm the package type corresponds to the standard SOT-23 footprint for PCB layout compatibility.

Voltage Reference Selection Notes

Select this component when a compact form factor is required alongside moderate precision levels. The CMOS architecture offers cost advantages over laser-trimmed bipolar references while maintaining comparable performance. Consider the 30 ppm/°C drift if the application environment experiences significant thermal fluctuations.

Voltage Reference Part Context

This part belongs to the LM4132 family of low-dropout voltage references designed for space-critical applications. The family includes various grades (A through E) offering different combinations of accuracy and temperature stability. The LM4132EMF-2.5 represents the E-grade option, balancing performance requirements with manufacturing efficiency.

Voltage Reference Replacement Considerations

LM4132EMFX-2.5/NOPB

Voltage Reference FAQ

Does the LM4132EMF-2.5 require an output capacitor for stability?

No, the device is stable with low-ESR ceramic capacitors and does not strictly require an output capacitor or buffer amplifier for operation.

How does the enable pin function affect power consumption?

Driving the enable pin low activates a shutdown mode that reduces the supply current to approximately 3 µA, significantly lowering power usage compared to the 60 µA active state.