LM4041CEM3-1.2+T

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A voltage reference is an electronic device which produces a reference voltage, typically with a magnitude of 1.2 V output. A device of this type is particularly applicable to digital and analog circuits, help ensure proper circuit functioning and secure reliable digital systems. LM4041CEM3-1.2+T is a NSC (National Semiconductor Corporation) precision wide input range shunt voltage reference, designed to provide a wide choice of output voltage options in order to fit into a broad range of applications.

The LM4041CEM3-1.2+T features high-precision and low-tolerance of ±1 mV with a temperature coefficient of 40 ppm/°C. It operates over a wide input voltage range of 2.0 to 28.0 V, and provides stable output voltages at 1.20, 1.25 and 1.8 V. It requires no external calibration, so it reduces system cost and eliminates drift over time, temperature and input voltage from initial setpoints. Advanced wafer fabrication techniques give these devices very low temperature coefficient and low noise.

The device operates using shunt regulation, which is both simple and economical. A voltage divider setup is used, with one resistor connected to the input voltage, another connected to the output, and the reference voltage of the LM4041CEM3-1.2+T bridging them. A current is drawn through R1 and this causes a voltage drop across it, which is sensed by the reference at the junction (J1) of the two resistors. If the voltage at this junction falls below 1.2 V, the reference increases the current through R1 until the voltage is restored, thus maintaining the set value of 1.2 V.

The LM4041CEM3-1.2+T also provides several important characteristics that make it a good choice for applications needing reliable, low impedance references. These include high output accuracy and stability over operating temperature and input voltage, and low noise and low drift versus input voltage and temperature.

The device is well suited for use in transceiver, audio and video, automotive and data acquisition electronic systems, where a reliable and accurate shunt regulator is desired. Due to its compact size and wide voltage range, the device can also be used in many applications which require a low voltage reference from 1.2V up to 28V. It can be used to set the proper performance level of an analog-to-digital converter, as well as providing an accurate, drift-free output voltage in high-precision analog and digital circuit applications.

In short, the LM4041CEM3-1.2+T is a stable, accurate voltage reference with a wide input voltage range that can be used in countless applications needing a reliable low-voltage reference from 1.2V to 28V. Its calibrated output accuracy, low-noise, and wide dynamic range make it an excellent choice for designers looking for an economical and dependable voltage reference.

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