LM4132AMF-3.3

Voltage Reference Overview

The LM4132AMF-3.3 is a precision series voltage reference manufactured by Texas Instruments, delivering a fixed output of 3.3 V in a SOT-23 package. It features an initial accuracy of ±0.05% and a temperature coefficient of 10 ppm/°C. The device operates with a supply current of 60 µA and supports a maximum load current of 20 mA. Input voltage ranges from VREF + 400 mV to 5.5 V. It includes an enable pin for shutdown mode (3 µA) and is stable with low-ESR ceramic capacitors.

Voltage Reference Feature Summary

• High precision CMOS architecture with EEPROM-based curvature correction
• Low dropout operation without requiring output buffer amplifiers
• Dedicated enable pin for ultra-low power shutdown capability

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix 'MF' against the manufacturer's official orderable addendum to confirm the exact packaging configuration and tape-and-reel specifications. Ensure the component grade matches the required initial accuracy and temperature coefficient parameters for your design constraints.

Voltage Reference Selection Notes

Select this part when high accuracy (±0.05%) and low drift (10 ppm/°C) are critical. It is suitable for space-constrained designs due to the SOT-23 footprint. Consider the 60 µA quiescent current for battery life calculations and verify input voltage headroom requirements relative to the 3.3 V output.

Voltage Reference Part Context

This component belongs to the LM4132 family of precision voltage references. The family utilizes CMOS technology with laser-trimmed performance characteristics achieved through EEPROM registers. It offers various voltage options and grades, providing flexibility for different accuracy and cost requirements in power management applications.

Voltage Reference Replacement Considerations

LM4132EMF-3.3/NOPB

Voltage Reference FAQ

Does the LM4132AMF-3.3 require an output capacitor?

No, the LM4132 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 (Enable) pin allows the device to be shut down, reducing the supply current to approximately 3 µA when driven low.