LM4040C10IDBZR

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PMIC (power management integrated circuit) is an integrated circuit that integrates a variety of power supply, voltage regulating and regulating functions. The LM4040C10IDBZR is a voltage reference within the PMIC family. It is a low-dropout, low-voltage, high-precision voltage reference, commonly used in precision voltage applications such as precision regulators and analog-to-digital converters.

The LM4040C10IDBZR has a wide operating voltage range of 1.71-5.5 V, ensuring that its precision is not affected by fluctuations in the input voltage. It can accurately output a 10 ppm/V stable reference voltage over a range of 1.0 V, 1.2 V, 1.5 V, 2.048 V, 2.5 V, and 4.096 V. Its low noise and low temperature coefficient make the LM4040C10IDBZR an ideal choice for discerning applications requiring highly accurate and reliable voltage reference sources.

Applications

The LM4040C10IDBZR voltage reference is often used in precision voltage applications, such as precision regulators and analog-to-digital converters. Examples of such applications include:

• Data acquisition systems
• Electronic weighing systems
• Telecommunication systems
• Battery Chargers
• Power supplies

Working Principle

The LM4040C10IDBZR operates by using a laser-trimmed bandgap circuit that adjusts the internal gain and offset voltage to ensure an accurate and stable reference voltage. This internal adjustment compensates for the errors in the external components, resulting in a robust and precise output voltage.

The output voltage of the LM4040C10IDBZR is determined by the external component values. The reference resistor (R1) and voltage divider resistor (R2) form a voltage divider circuit, and the output voltage is determined by the input voltage and the ratio between the resistance values.

The output voltage of the voltage reference can be calculated with the following equation: Vout = 1.2V x (1 + (R1/R2)). If a precise output voltage is required, the values of R1 and R2 must be precisely calculated according to the expected output voltage.

The LM4040C10IDBZR also offers a high CMRR (Common-mode rejection ratio) of 86 dB^2. This CMRR offers excellent noise rejection and helps ensure stable output stability.

To ensure accurate operation over a wide temperature range, the LM4040C10IDBZR uses a laser-trimmed internal gain and offset voltage. The built-in temperature coefficient ensures stable output over various temperature ranges.

The LM4040C10IDBZR is a precision voltage reference that offers a high degree of accuracy and stability. Its wide operating voltage range, low noise, and low temperature coefficient make it ideal for precision voltage reference applications.

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