ADR421BRZ

Temperature Coefficient:	3ppm/°C
Base Part Number:	ADR421
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:	600µA
Voltage - Input:	4.5 V ~ 18 V
Noise - 10Hz to 10kHz:	--
Noise - 0.1Hz to 10Hz:	1.75µVp-p
Series:	XFET®
Tolerance:	±0.04%
Current - Output:	10mA
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Fixed
Reference Type:	Series
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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ADR421BRZ Voltage Reference

ADR421BRZ is a precision 5.0V, high-accuracy voltage reference from Analog Devices, Inc. It is designed for use in power management and personal computer systems on chips. The ADR421BRZ is specifically designed to provide an accurate voltage reference even when specified over a wide input voltage range.

Features of ADR421BRZ

The ADR421BRZ features an adjustable current limit, under-voltage lockout (UVLO), and a low dropout voltage. These features make the ADR421BRZ an excellent choice for a voltage reference in power management and personal computer systems on a single chip. The ADR421BRZ provides an output accuracy of ±1%, including a low temperature drift of 0.015%/°C, making it ideal for use in a variety of high accuracy, precision applications. It also has an operating temperature range of -40°C to +85°C, making it suitable for a variety of environments. The ADR421BRZ also features a low quiescent current of 60μA, making it well suited for low power applications. Additionally, the ADR421BRZ is available in a space-saving, surface-mount package.

Applications of ADR421BRZ

The ADR421BRZ is a precision 5.0V, high-accuracy voltage reference designed for use in power management and personal computer systems on chips. Its features make it ideal for use in a variety of applications, including:• Precision temperature measurement and control systems • Voltage & frequency control • Industrial and automotive power supplies • Digital circuits • Switched Mode Power Supplies (SMPS) • LCD backlighting • LCD television and computer monitors • Battery powered equipment • Network communications systems

Working Principle of ADR421BRZ

The ADR421BRZ operates on the principle of a precision bandgap reference. It uses an integrated current-sense amplifier, bandgap reference, and a current mirror to generate an accurate 5.0V output voltage. The integrated current-sense amplifier senses the current flowing through a resistor, then the bandgap reference compares the sensed current to its reference voltage to generate an output voltage. The current mirror then amplifies the bandgap output to achieve the 5.0V output voltage. The ADR421BRZ also includes an adjustable current limit, under-voltage lockout (UVLO), and a low dropout voltage. This protects the output voltage from excessive current draw, and helps to ensure stable output voltage. The ADR421BRZ is designed to be used in a variety of low power applications due to its low quiescent current of 60μA and wide operating temperature range of -40°C to +85°C. The ADR421BRZ is an excellent choice for a precision voltage reference in power management and personal computer systems on a single chip due to its high accuracy and reliability. Its features, including a wide input voltage range, adjustable current limit, under-voltage lockout, and low quiescent current make it ideal for a variety of applications.

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