LM4132AMFX-1.8/NOPB

Voltage Reference Overview

The LM4132AMFX-1.8/NOPB is a precision series voltage reference manufactured by Texas Instruments, housed in a surface-mount SOT-23-5 package. It provides a fixed output voltage of 1.8 V with an initial accuracy of ±0.05%. The device features a temperature coefficient of 20 ppm/°C and supports a maximum shunt current of 20 mA. It operates within an input voltage range up to 6 V and functions across a temperature range of -40°C to +125°C. The component draws a typical operating supply current of 60 µA and includes a shutdown enable feature for power management.

Voltage Reference Feature Summary

• Provides high-precision fixed voltage output with tight initial accuracy tolerance
• Features low temperature drift characteristics for stable performance across wide thermal ranges
• Integrates a shutdown enable pin to reduce power consumption during inactive periods
• Utilizes a compact SOT-23-5 surface-mount package for space-constrained designs

Voltage Reference Applications

• Portable battery-powered instrumentation requiring low quiescent current
• Data acquisition systems needing stable reference voltages for ADCs
• Medical devices demanding high precision and reliability
• Industrial process control loops utilizing sensor signal conditioning

Voltage Reference Procurement Notes

Verify the complete part number including the suffix 'NOPB' to ensure lead-free compliance and specific trim version. Confirm the 'AM' grade designation matches the required 0.05% accuracy specification. Check the 'X' suffix for tape-and-reel packaging requirements versus cut-tape availability. Ensure the manufacturer is Texas Instruments to avoid counterfeit components from other sources.

Voltage Reference Selection Notes

Select this component when a 1.8 V reference is required with superior drift performance compared to standard options. The 20 ppm/°C coefficient offers better thermal stability than the LM4132DM variant. Consider the shutdown capability if system power efficiency is critical. Verify that the 20 mA load current meets the downstream circuit demands without exceeding the maximum rating.

Voltage Reference Part Context

This device belongs to the LM4132 family of precision low-dropout voltage references. It shares the same form factor and basic functionality as other variants like the LM4132EMFX-1.8/NOPB but differs in accuracy grades and temperature coefficients. The AM grade represents the highest precision tier within the standard commercial lineup, offering tighter tolerances than DM or EM versions.

Voltage Reference Replacement Considerations

LM4132EMFX-1.8/NOPB: Offers similar functionality but with 0.5% initial accuracy instead of 0.05%. LM4132DMFX-1.8/NOPB: Provides 1% accuracy with higher temperature drift. LM4128AMFX-1.8/NOPB: Different series with 75 ppm/°C drift and 0.1% accuracy.