LM4132EMF-3.3

Voltage Reference Overview

The LM4132EMF-3.3 is a precision series voltage reference manufactured by Texas Instruments, featuring a fixed output of 3.3 V. It operates within an input voltage range of 3.7 V to 5.5 V and delivers up to 20 mA of load current. The device exhibits an initial accuracy of ±0.5% and a temperature coefficient of 30 ppm/°C across the -40°C to +125°C junction temperature range. Quiescent supply current is typically 60 µA, reducing to 3 µA in shutdown mode via the enable pin. It utilizes a CMOS band-gap architecture with EEPROM trimming for high stability.

Voltage Reference Feature Summary

• EEPROM-based package-level programming corrects curvature, temperature coefficient, and accuracy to overcome assembly shifts.
• Integrated enable pin allows for low-power shutdown operation with minimal standby current consumption.
• Capable of delivering 20 mA output current without requiring an external buffer amplifier or output capacitor.
• Low dropout voltage design ensures efficient performance in battery-powered applications.

Voltage Reference Applications

• Instrumentation and process control systems
• Data acquisition systems
• Portable and battery-powered equipment
• Precision regulators

Voltage Reference Procurement Notes

Verify that the ordering suffix 'EMF' corresponds to the E-grade (±0.5% accuracy) variant rather than higher grades like A or B. Confirm the '-3.3' designation matches the required 3.3 V output level. Ensure the 'NOPB' suffix indicates lead-free and RoHS compliance as specified in the datasheet. Check the SOT-23-5 package marking against the manufacturer's latest pinout documentation to avoid orientation errors during assembly.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with moderate precision is sufficient for the application. The E-grade offers a balance of cost and performance suitable for general-purpose industrial uses. Consider higher grades if tighter accuracy or lower temperature coefficients are required. Verify that the 20 mA load capability meets system demands without exceeding thermal limits in the SOT-23 package.

Voltage Reference Part Context

This part belongs to the LM4132 family of precision low-dropout voltage references from Texas Instruments. The family includes various voltage options and accuracy grades (A through E). The LM4132 series is designed to compete with laser-trimmed bipolar references while offering the benefits of CMOS technology, including lower power consumption and integrated enable functionality in a compact SOT-23 package.

Voltage Reference Replacement Considerations

LM4132EMF-3.3/NOPB