LM4040BIM3-3.0 Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Reference Type:	Shunt
Output Type:	Fixed
Voltage - Output (Min/Fixed):	3V
Current - Output:	15mA
Tolerance:	±0.2%
Temperature Coefficient:	100ppm/°C
Noise - 0.1Hz to 10Hz:	--
Noise - 10Hz to 10kHz:	35µVrms
Voltage - Input:	--
Current - Supply:	--
Current - Cathode:	67µA
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	LM4040

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LM4040BIM3-3.0 Voltage Reference Overview

The LM4040BIM3-3.0 is a voltage reference manufactured by Texas Instruments. It is a three-terminal shunt regulator device, labeled as an "ideal voltage reference". Voltage references of this type are commonly used to provide a stable reference voltage to circuits such as analog-to-digital (A/D) converters, A/V receivers, power supplies, and microcontrollers.

Features

The LM4040BIM3-3.0 includes a number of features which makes it an attractive option for implementations. Its rated output voltage of 3.0V is ideal for most applications, and its tight tolerance of 0.02% ensures that the reference voltage does not drift over time. Other features include its ability to provide a steady output voltage over a wide temperature range of -40°C to +85°C, its low output impedance of 0.2Ω, and its wide input voltage range from 4.25V to 36V.

Application

The LM4040BIM3-3.0 can be used in a wide range of applications, from automotive to consumer electronics. Some common implementations include on-board voltage reference for A/D converters and microcontrollers, power supply tuning and calibration, and low power linear regulators. Furthermore, it is well-suited to applications where the reference voltage source needs to be stable over variations in temperature and voltage fluctuations.

Working Principle

The LM4040BIM3-3.0 uses a three-terminal shunt regulator device to produce its stable output voltage. This device consists of a low resistance shunt connected between the power supply and the output voltage. The power supply is then regulated by the device, providing a steady output terminal voltage. This is done by a process known as voltage substitution, where the voltage across the shunt is monitored and adjusted accordingly to maintain a constant output voltage.

Conclusion

Overall, the LM4040BIM3-3.0 is an ideal voltage reference model for a variety of applications. Its ability to produce a steady output voltage over wide temperature and voltage fluctuations, along with its tight tolerance, makes it an excellent choice for situations where accuracy and stability are paramount. As such, it is an essential component for a variety of automotive, industrial, and consumer electronics implementations.

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