AD586JR

Noise - 0.1Hz to 10Hz:	4µVp-p
Base Part Number:	AD586
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Supply:	3mA
Voltage - Input:	10.8 V ~ 36 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	25ppm/°C
Tolerance:	±0.4%
Current - Output:	10mA
Voltage - Output (Min/Fixed):	5V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tube

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PMIC - Voltage Reference

The AD586JR is a precision micropower bandgap voltage reference circuit (PMIC) from Analog Devices. It is ideal for use in applications where a stable reference voltage is needed, such as regulation, battery-powered systems, and portable applications. The AD586JR operates over a temperature range from -40°C to +85°C, and is compatible with 3.3V and 5V systems.

Description

The AD586JR operates as a true band gap regulator which is designed to reject line and load disturbances and provide a small, stable output voltage over temperature and varying supply voltages, while consuming very little current. The device consists of a reference amplifier and band gap current source. The band gap current source provides a high rejection ratio over temperature variations, while the amplifier converts the current to a voltage. The amplifier has a voltage gain of 1, and is adjustable by an external resistor and can be used to adjust the reference voltage to nearly any value. Furthermore, the device features an adjustable-bias current, which compensates for errors caused by temperature variations in voltage supply and temperature effect on the resistive divider which sets the output voltage.

Features and Benefits

The AD586JR offers several features and benefits, including:- Low power consumption: the AD586JR consumes a maximum of 1.2 mA over the -40°C to +85°C temperature range.- High accuracy: the AD586JR has a low output impedance and offers high accuracy of ±0.5% for resistive dividers.- Low noise: the AD586JR has a maximum RMS output noise of 6μV, which allows for the use of lower valued static current sources.- Great temperature stability: the device offers a temperature coefficient of ±25 ppm/°C- High output current capability: the AD586JR can supply up to 100mA at the output.

Applications

Due to its low power consumption and high accuracy, the AD586JR is ideal for a variety of applications, including:- Battery powered systems- Power-supply voltage regulation - Automotive systems - Logic power regulation- Telecommunications systems- Process control systems- Medical instrumentation

Working Principle

The AD586JR is a precision voltage reference circuit consisting of a band gap current source and a reference amplifier. The current source is a stabilizing element, regulated to its design temperature, with a high rejection ratio for variations in temperature and supply voltage. The reference amplifier has a voltage gain of 1 and is adjustable by an external resistor.The band gap current source consists of two sets of transistors, which control the base emitter voltage of each other. This in turn sets the flow of current through an external resistor. The value of this resistor sets the output voltage.The reference amplifier uses the current from the band gap source to create a voltage across itself. This voltage is converted to the desired output voltage by a resistive divider. The amplifier\'s voltage gain is adjustable by changing the value of the external resistor.

Conclusion

The AD586JR is an excellent choice for use in applications requiring a stable reference voltage. It\'s low power consumption, low noise, and high accuracy make it ideal for battery-powered systems, regulation, and other portable applications. The device is well-suited for automotive systems, telecommunications systems, process control systems, and medical instrumentation. It has a voltage gain of 1 and is adjustable by an external resistor, and features adjustable-bias current to compensate for errors due to temperature and varying supply voltages.

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