ADR361BUJZ-R2

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The ADR361BUJZ-R2 is a device under the category of PMIC - Voltage Reference. It is a Micropower Tuneable Bandgap Voltage Reference specifically designed for battery powered applications. The bandgap reference is integrated in an eight-pin SOT-23 package. It is designed to operate from a single 2.7 V to 6.0 V supply with a quiescent supply current of only 200 nA.

The reference output voltage can be tuned from 0.8 V to 2.4 V. This is accomplished with a single external resistor. The output voltage is well specified over temperature, with a typical total variation of 50 mV. The output impedance is also low, typically 30 Ω. The ADR361BUJZ-R2 contributes to the reduction of component count and board space, its small SOT-23 package contributing to its miniscule form factor.

In terms of applications, the ADR361BUJZ-R2 could be used in a wide variety of circuits such as radio receivers, audio amplifiers, digital-to-analog converters, analog-to-digital converters, and power management systems. With features such as very low quiescent current, low output levels, and low supply current, it can work in any application with a low-power or battery-powered system.

Now let\'s get into the working principle of the ADR361BUJZ-R2. The reference circuit consists of a bandgap reference, a temperature sensor, and an amplifier stage. The bandgap reference circuit is capable of producing a low temperature stability voltage reference up to 10 times the supply voltage drop, with a typical temperature stability of 250 ppm/°C. The temperature sensor measures the temperature of the die and compensates for the temperature variation of the reference output voltage.

The amplifier stage has an externally adjustable gain which can be set by a single external resistor. This resistor also sets the output voltage range of the reference. With the gain of the amplifier, the bandgap reference is amplified and the temperature compensation is also applied. This amplifier stage is capable of providing an output swing of up to 0.4 V.

The low-noise amplifier is designed using a very high input impedance, low-distortion topology. The amplifier stage also provides frequency compensation with a built-in pole and zero where the zero of the compensation is frequency compensated. The amplifier stage has a gain bandwidth product of 60 kHz and is optimized for mid-band noise performance.

In summary, the ADR361BUJZ-R2 Voltage Reference is a very useful device for applications that require low-power or battery-powered systems. It is integrated in an eight-pin SOT-23 package and operates from a single 2.7 V to 6.0 V supply. The output voltage range is adjustable from 0.8 V to 2.4 V and features very low quiescent current, low output levels, and low supply current. The amplifier stage provides an output swing up to 0.4 V, with frequency compensation and a gain bandwidth product of 60 kHz. In addition, the reference output is well specified with a typical total variation of 50 mV over temperature.

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