REF5040ID

Noise - 0.1Hz to 10Hz:	3µVp-p
Base Part Number:	REF5040
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Current - Supply:	1.2mA
Voltage - Input:	4.296 V ~ 18 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	3ppm/°C
Tolerance:	±0.05%
Current - Output:	10mA
Voltage - Output (Min/Fixed):	4.096V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Active
Packaging:	Tube

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Introduction

Voltage Reference, popularly known as a Voltage References or Precision Voltage Reference is a device designed to maintain a fixed, highly accurate and symmetrical reference voltage. It is commonly used as a low noise power supply voltage for precision electronic circuits and as a reference voltage to other electronic circuits.The REF5040ID is a high-precision, low-drop-out single supply voltage reference. This IC features a wide operating range, fast switching time and precision accuracy. Its low-noise power supply design makes it ideal for applications such as process control, system monitoring, alarm systems and telecommunication equipment.

Applications

The REF5040ID voltage reference can be used in a wide variety of applications. In laboratory testing, the device can be used to provide a precise and stable voltage source for measuring and calibrating of test instruments. It is also commonly used in analog-to-digital converters to measure absolute levels of signal energy.The device is ideal for process control and system monitoring applications as it provides highly stable output voltages and a fixed reference voltage. For example, it can be used in a voltage-to-current converter to maintain a constant current over a wide range of voltage inputs.The device is also well-suited for communications and data link applications, providing a stable reference voltage even when placed in an ever-changing environment. The REF5040ID can also be used in any application where its high accuracy and low drop-out features provide an advantage over traditional solutions.

Working Principle

The REF5040ID is a low drop-out voltage reference which uses a bandgap architecture to achieve a highly accurate voltage output. The device works by regulating the output voltage with a low-noise differential amplifier whose gain is controlled by a series of resistors, capacitors, and diodes.The output voltage is determined by the bandgap voltage reference, one of the resistors, and the current-sourcing/sinking differential amplifier. When the device is powered on, the bias voltage is applied and the reference voltage is established.The output voltage can be adjusted using the two control pins located on the device. These pins are connected to the two control resistors which affect the gain of the differential amplifier. This enables the user to adjust the output voltage, based on their desired output voltage level.The output regulation is achieved by the feedback circuit that measures the output voltage and uses a low-noise amplifier to compare it to the reference voltage. If the output voltage is not equal to the reference voltage, the feedback circuit will adjust the gain of the differential amplifier and the output voltage will be regulated accordingly.The REF5040ID features a wide input voltage range, making it suitable for use in a variety of applications. The device also features low 3-2 ppm/°C temperature coefficient and fast 250µs switching time. Its high-precision accuracy ensures that the output voltage is extremely stable over a wide range of temperature and input voltage changes.

Conclusion

The REF5040ID is a high-precision single supply voltage reference ideal for a variety of applications. Its wide operating range, fast switching time and precision accuracy make it the ideal device for laboratory testing, process control and system monitoring, communications and data link applications, or any application where its high accuracy and low drop-out characteristics provide an advantage over traditional solutions. Its low noise power supply design enables the device to maintain a stable output voltage even when placed in an ever-changing environment.

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