LM4050BEM3-3.0+T

A voltage reference is an electrical reference device used to assure constant voltage output regardless of load or fluctuation of the power supply. The LM4050BEM3-3.0+T is an advanced monolithically integrated precision micropower voltage reference and is one of the devices in this field. This voltage reference provides very low operating power, wide input voltage range, low temperature coefficient, micro-amp operating current and low noise performance. The device is available in typical operation voltages of 2.5 V, 3.0 V, 3.5 V and 5.0 V.

The application field of the LM4050BEM3-3.0+T spans from industrial, automotive, communications and military to consumer applications. As a voltage reference, it is especially suitable for use in systems powered by regulated voltage supplies such as auxiliary power supplies, battery backed up supplies and standby supplies. It is also an ideal reference for analog-to-digital converters, digital-to-analog converters, electronic pressure and temperature controls and other precision voltage measuring or controlling applications.

The working principle of the LM4050BEM3-3.0+T is based on the concept of well-defined voltage reference circuits. This device uses a CMOS circuit with a thin-film resistor divider reference structure. The thin-film resistor divider provides a precise reference voltage, and the CMOS circuit provides optimized temperature coefficient, low drift and low impedance output. The basic circuit structure is as follows:

The input voltage is applied to the thin-film resistor divider network and a reference voltage is developed. This reference voltage is then applied to the negative terminal of the CMOS comparator. The output of the CMOS comparator is then sent to the voltage reference buffer amplifier. This buffer amplifier amplifies the signal and provides a low impedance output. The output of the amplifier is the output of the LM4050BEM3-3.0+T reference voltage.

In order to maintain a stable output, the amplifier is biased by a current mirror circuit that mirrors the current of the thin-film resistor divider. The output of the reference voltage also features an error amplifier that can be configured to provide a small adjustment to the output voltage. This adjustment can be used to trim the output voltage to a desired set-point.

In conclusion, the LM4050BEM3-3.0+T advanced monolithically integrated precision micropower voltage reference provides very low operating power, wide input voltage range, low temperature coefficient, micro-amp operating current and low noise performance. It is suitable for applications in industrial, automotive, communications, military and consumer systems. The device uses a CMOS circuit with a thin-film reference structure and an error amplifier to provide precision voltage reference and adjustable output voltage.