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Ⅰ.Overview of product

The LM4128BQ1MFX3.3/NOPB is an automotive-grade fixed 3.3V series voltage reference manufactured by Texas Instruments. It features low noise and high precision, widely used for stable voltage reference calibration in various automotive and industrial circuits.

Ⅱ.Core parameter

Category:Integrated Circuits (ICs),Power Management (PMIC),Voltage Reference

Noise - 0.1Hz to 10Hz:310µVp-p

Manufacturer:Texas Instruments

Voltage - Input:3.7V ~ 5.5V

Packaging:Tape & Reel

Current - Supply:100µA

Part Status:Active

Operating Temperature:-40°C ~ 125°C (TJ)

Reference Type:Series

Output Type:Fixed

Qualification:AEC-Q100

Voltage - Output (Min/Fixed):3.3V

Mounting Type:Surface Mount

Current - Output:20 mA

Package / Case:SC-74A, SOT-753

Tolerance:±0.2%

Temperature Coefficient:75ppm/°C

Ⅲ.Main characteristics

Fixed Output:Provides precise fixed 3.3V output voltage for unified circuit reference standards. It supports accurate voltage calibration for mainstream low-voltage control systems.
High Precision:Features ultra-low ±0.2% output tolerance to ensure minimal voltage deviation. It guarantees high accuracy of subsequent sampling and detection circuits.
Low Noise:Delivers only 310µVp-p low noise within 0.1Hz–10Hz frequency band. It effectively avoids signal jitter and improves circuit stability.
Micro Power:Consumes merely 100µA supply current with ultra-low power loss. It is suitable for battery-powered and energy-saving electronic devices.
Auto Grade:Complies with AEC-Q100 automotive qualification standards with high reliability. It adapts to harsh and variable automotive working environments.
Compact Package:Adopts SOT-753 miniature surface-mount package for small PCB occupation. It facilitates high-density layout of compact electronic modules.

Ⅳ.Application field

Auto ECU:Provides stable reference voltage for automotive engine control ECU sampling circuits. It ensures accurate collection of engine sensor analog signals.
BMS System:Calibrates voltage sampling channels of vehicle battery management systems. It improves the detection accuracy of battery voltage and residual power.
ADC Reference:Serves as precision reference source for industrial miniature ADC conversion modules. It eliminates conversion errors caused by unstable supply voltage.
Sensor Calibration:Supplies standard voltage reference for automotive temperature and pressure sensors. It corrects sensor output drift and improves detection precision.
Car Audio:Provides stable reference voltage for vehicle audio signal processing circuits. It reduces audio noise and ensures pure sound quality output.
Industrial Module:Used for voltage benchmark calibration of low-power industrial detection modules. It guarantees long-term stable operation of industrial monitoring equipment.

Ⅴ.Summary

The LM4128BQ1MFX3.3/NOPB is a high-precision, low-noise automotive-grade voltage reference chip with outstanding environmental adaptability. Its low power consumption and compact size make it a preferred benchmark component for automotive electronics and low-power industrial precision circuits.