LM4132EMFX-2.5

Voltage Reference Overview

The LM4132EMFX-2.5/NOPB is a precision series voltage reference from Texas Instruments, delivering a nominal output of 2.5 V in a compact SOT-23-5 package. It features an initial accuracy of ±0.5% and a temperature coefficient of 30 ppm/°C across the -40°C to +125°C operating range. The device operates with a supply current of 60 µA and supports up to 20 mA of load current. It requires a maximum input voltage of 5.5 V and includes an enable pin for power management.

Voltage Reference Feature Summary

• Utilizes EEPROM registers for curvature correction and package-level programming to maintain high accuracy.
• Provides low dropout performance suitable for battery-powered applications without requiring an output capacitor.
• Includes an enable pin that allows switching to a low-power shutdown mode.

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the suffix 'NOPB' indicates lead-free status and RoHS compliance. Confirm the 'E' grade designation corresponds to the required 0.5% accuracy and 30 ppm/°C temperature coefficient specifications. Ensure the SOT-23-5 package variant matches the footprint requirements.

Voltage Reference Selection Notes

Select this component when space constraints require a small SOT-23 package alongside moderate precision needs. The E-grade offers a cost-effective solution compared to higher grades while maintaining sufficient stability for general instrumentation. Verify that the 20 mA output capability meets the load requirements.

Voltage Reference Part Context

This part belongs to the LM4132 family of CMOS-based precision voltage references. The family utilizes band-gap architecture enhanced by EEPROM trimming to overcome assembly shifts common in plastic packages. This technology allows for performance comparable to laser-trimmed bipolar references at a lower cost.

Voltage Reference Replacement Considerations

LM4132EMF-2.5/NOPB (Tape & Reel)

Voltage Reference FAQ

Does the LM4132EMFX-2.5 require an output capacitor?

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

What is the function of the EN pin?

The EN pin serves as an enable control. Driving it low activates a shutdown mode with reduced supply current, while driving it high enables normal operation.