LM4040CEM3-5.0

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The LM4040CEM3-5.0 is a precision, low-voltage reference device which was developed for use with analog to digital converters. It is an integrated, three-terminal, CMOS voltage reference that is capable of delivering ultra-stable, fixed output voltages from 0.5V to 5.0V. The LM4040CEM3-5.0 is a high-accuracy reference, excellent for precision supply systems and applications that require extremely low-power linear regulation.

Product Description

The LM4040CEM3-5.0 parts are designed, qualified, and tested in accordance with AEC-Q100 automotive industry performance standard. The parts belong to the PMIC - Voltage Reference family and are available in a SOT-23-3 package. The device is rated over the automotive temperature range of -40°C to +125°C and is dual flow production tested at +125°C over this temperature range.

The LM4040CEM3-5.0 are precision 2.5V, 3.0V, and 5.0V micropower rails for general-purpose systems. The low-power voltage reference has an operating current of 40µA which makes it a lower power alternative to the 5.0V shunt references available. The device also functions as a precision 5.0V source with a guaranteed 0.02% initial accuracy. With a small temperature coefficient and trim capability, the LM4040CEM3-5.0 is suitable for use as a supply rail reference in any application requiring precise regulation.

Features & Benefits

The LM4040CEM3-5.0 parts offer many benefits and features, some of which are listed below:

• Low-dropout (LDO) operation mode with a reference current of 40µA
• Integrated CMOS-based temperature compensation circuit eliminating the need for external components
• Operating temperature range of -40°C to +125°C
• Trim capability allows device to be tailored to specific applications
• Wide output voltage range of 0.5V - 5.0V
• Available in a SOT-23-3 package

Applications

The LM4040CEM3-5.0 is a high-accuracy voltage reference that works well in applications requiring linear regulation, especially within a precision supply system. The device is ideal for applications such as analog-to-digital converter (ADC) devices, power supplies, battery-powered devices, medical equipment, and automotive systems. The low-power, small-size package makes it particularly well-suited for devices such as battery-powered automotive instruments, portable medical equipment, and smart devices.

Working Principle

The working principle of the LM4040CEM3-5.0 is quite simple. It is essentially a voltage divider with a fixed resistor connected to the reference voltage of 5.0V. This reference voltage is then divided by two resistors, one of which is trimmed to the desired output voltage. The voltage reference then outputs the divided voltage, which is consistent and stable even when the voltage source fluctuates.

The device also features a internal CMOS-based temperature compensation circuit which eliminates the need for external temperature compensating components. This offers the user the advantage of reduced component count, cost, and space.

Conclusion

The LM4040CEM3-5.0 is an ultra-low-power voltage reference device designed to provide extremely stable, fixed output voltages from 0.5V to 5.0V. It is particularly well-suited for precision supply systems and applications that require minimal power consumption. With its excellent accuracy and temperature coefficient, the LM4040CEM3-5.0 is the perfect choice for any high-accuracy, low-power voltage reference solution.

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