LM4050QBEM3-8.2/NOPB

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The LM4050QBEM3-8.2/NOPB is a precision voltage reference device from National Semiconductor Corporation. It is a member of the Voltage Reference family of products in the Power Management and Interface (PMIC) product line. The LM4050 family of voltage references are designed with a bandgap reference circuit that provides excellent ac and dc performance over a wide range of temperatures and supply voltages.

Overview

The LM4050QBEM3-8.2/NOPB is a bipolar silicon monolithic voltage reference designed to provide a precision adjustable 2.5V output. It is designed to meet low-noise requirements with reduced quiescent current and improved output accuracy over a temperature range of -55°C to +125°C. The device is available in a standard 4-pin SOT-23 and 5-pin TSOT23 packages. It is also available in lead-free packages.

The LM4050QBEM3-8.2/NOPB provides 1.0V to 6.0V adjustable output voltage with 0.3% maximum output voltage tolerance over the -55°C to +125°C temperature range. The device can be used as a precision voltage reference for circuits such as precision level shifters, switched capacitor amplifiers, DAC buffers, regulated power supplies, and to set the reference level of a data converter.

Features

• Output accuracy: 0.3% maximum over the temperature range of -55°C to +125°C
• Adjustable output voltage: 1.0V to 6.0V
• Low quiescent current: 10µA maximum
• Low temperature coefficient: 20ppm/°C maximum
• Supply voltage range: 2.0V to 10V
• Low noise: 10µVRMS for 10kHz to 100kHz bandwidth
• Package types: SOT-23 and TSOT23

Applications

The LM4050QBEM3-8.2/NOPB is a precision voltage reference device designed for a wide range of applications. It is used in many low-power portable systems such as LCD backlights, PDAs, laptops, and other battery-powered applications. The device can be used as a precision reference for amplifiers, audio systems, and power regulators. It can also be used as a reference for data converters such as A/D and D/A converters. Additionally, the LM4050QBEM3-8.2/NOPB can be used as a precision level shifter to convert signals between different supply voltages.

Working Principle

The LM4050QBEM3-8.2/NOPB is a precision voltage reference device based on a bandgap reference circuit. The bandgap reference circuit is a temperature-compensated voltage reference circuit that provides a stable voltage reference over a wide range of temperatures. The device consists of an integrated bipolar junction transistor (BJT), a resistor and a capacitor connected in series to form a bandgap reference circuit. The output voltage of the bandgap reference circuit is determined by the ratio of the resistor and capacitor values. The output of the bandgap reference circuit is then buffered by an amplifier to provide a stable reference voltage.

The output voltage of the LM4050QBEM3-8.2/NOPB can be adjusted by changing the resistor and capacitor values connected to the device. The device also includes an internal temperature compensation circuit that adjusts the output voltage to keep it stable over temperatures. The device can also be adjusted to provide a higher voltage output level.

The LM4050QBEM3-8.2/NOPB provides excellent ac and dc performance. The device has low quiescent current consumption and low noise, making it suitable for low-power portable applications. The device can operate over a wide supply voltage range of 2.0V to 10V and is available in lead-free packages.

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