LM4132DMF-3.3

Voltage Reference Overview

The LM4132DMF-3.3 is a precision low dropout voltage reference from Texas Instruments, housed in an SOT-23 (SC-74A) package with five pins. It provides a fixed output voltage of 3.3V with an initial accuracy tolerance of ±0.4%. The device operates within an input voltage range of 3.7V to 5.5V and supports a maximum load current of 20 mA. Key electrical characteristics include a supply current of 100µA at maximum temperature, a temperature coefficient of 20ppm/°C, and an output noise voltage of 310µVp-p in the 0.1Hz to 10Hz band. It functions reliably across a junction temperature range of -40°C to 125°C.

Voltage Reference Feature Summary

• Features an enable pin that allows for a low-power shutdown mode with minimal supply current consumption.
• Utilizes EEPROM registers for package-level programming to correct curvature and accuracy, overcoming assembly shifts common in CMOS band-gap architectures.
• Capable of delivering up to 20 mA of output current without requiring an external output capacitor or buffer amplifier.

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific grade suffix 'D' corresponds to the required ±0.4% accuracy and 20ppm/°C temperature coefficient specifications. Confirm the 'MF' suffix indicates the SC-74A/SOT-753 package variant. Ensure the component meets AEC-Q100 requirements if automotive qualification is necessary for the target application environment.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference with moderate precision is needed in a space-constrained design. The D-grade offers a balance between cost and performance compared to higher grades like A or B. Consider the 20mA drive capability for applications requiring direct loading without additional buffering circuitry.

Voltage Reference Part Context

This part belongs to the LM4132 family of precision voltage references manufactured by Texas Instruments. The family utilizes CMOS technology with EEPROM correction to achieve laser-trimmed bipolar reference performance. The LM4132 series includes multiple voltage options and grades (A through E) to provide flexibility for various precision applications.

Voltage Reference Replacement Considerations

LM4132DMFX-3.3

Voltage Reference FAQ

Does the LM4132DMF-3.3 require an output capacitor for stability?

No, the LM4132 does not require an output capacitor or buffer amplifier for stability, although one may be used for noise reduction.

What is the function of the EN pin on the LM4132DMF-3.3?

The EN pin is an enable input that allows the device to enter a shutdown mode, reducing the supply current to approximately 3µA when driven low.