LM4132AMFX-3.3

Voltage Reference Overview

The LM4132AMFX-3.3 is a precision series voltage reference manufactured by Texas Instruments, housed in a SOT-23 (5) package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.05% and a temperature coefficient of 10 ppm/°C. The device operates within a junction temperature range of -40°C to +125°C, drawing a typical supply current of 60 µA. It supports a maximum load current of 20 mA and features an enable pin for a 3 µA shutdown mode.

Voltage Reference Feature Summary

• EEPROM-based laser-trimmed CMOS architecture corrects curvature and temperature drift for high stability
• Integrated enable pin allows switching between active operation and ultra-low power shutdown mode
• Capable of delivering up to 20 mA without requiring an external buffer amplifier or output capacitor

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance status. Confirm that the 'AMF' designation corresponds to the A-grade performance metrics and the SOT-23-5 surface-mount package type. Ensure the ordering code matches the required 3.3 V output variant.

Voltage Reference Selection Notes

Select this component when high precision and low quiescent current are critical. The A-grade specification ensures minimal initial error and drift. Consider the dropout voltage requirements relative to the input supply and load current to ensure stable regulation under all operating conditions.

Voltage Reference Part Context

This part belongs to the LM4132 family of precision low-dropout voltage references. The family utilizes cost-effective CMOS technology with EEPROM registers for package-level programming. Other variants in the series offer different voltage options and grades, such as B, C, D, and E, which provide varying levels of accuracy and temperature coefficients.

Voltage Reference Replacement Considerations

LM4132AMFX-3.3/NOPB

Voltage Reference FAQ

Does the LM4132AMFX-3.3 require an output capacitor?

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

What is the function of Pin 3 on the LM4132AMFX-3.3?

Pin 3 is the Enable (EN) pin. Driving it low activates the shutdown mode, reducing supply current to approximately 3 µA.