LM4132CMFX-3.3/NOPB

Voltage Reference Overview

The LM4132CMFX-3.3/NOPB is a precision series voltage reference manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.2%. The device features a temperature coefficient of 30 ppm/°C and supports a maximum shunt current of 20 mA. It operates within an input voltage range of 3.4 V to 6 V and functions across a temperature range of -40°C to +125°C. The unit consumes a typical supply current of 60 µA.

Voltage Reference Feature Summary

• Precision series voltage reference topology designed for high stability
• Integrated shutdown enable functionality for power management
• Low dropout operation suitable for battery-powered applications
• Compact SOT-23-5 packaging optimized for space-constrained designs

Voltage Reference Applications

• Portable instrumentation requiring stable reference voltages
• Battery-operated systems needing low quiescent current
• Data acquisition systems utilizing analog-to-digital converters
• Industrial control circuits demanding temperature stability

Voltage Reference Procurement Notes

Verify the specific suffix 'CMFX' against official Texas Instruments documentation to confirm exact tolerance and packaging specifications. Ensure compatibility with existing PCB footprints for the SOT-23-5 package. Cross-reference the part number with authorized distributors to validate authenticity and avoid counterfeit components during sourcing.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with ±0.2% accuracy is required in a small form factor. Consider the 30 ppm/°C drift rate for thermal environments. Evaluate the 20 mA load capability against circuit requirements. Compare against other LM4132 variants if different output voltages or tighter tolerances are needed.

Voltage Reference Part Context

This part belongs to the LM4132 family of micropower, precision shunt voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades within the SOT-23-5 package. It serves as a drop-in replacement for older National Semiconductor versions, maintaining pinout compatibility while offering improved performance metrics.

Voltage Reference Replacement Considerations

LM4132EMFX-3.3/NOPB: Offers ±0.5% accuracy instead of ±0.2%. LM4132AMFX-3.3/NOPB: Provides higher ±0.05% accuracy. Verify that the alternative's input voltage range and current consumption meet system constraints before substitution.