AD8572ARUZ

Voltage - Input Offset:	1µV
Base Part Number:	AD8572
Supplier Device Package:	8-TSSOP
Package / Case:	8-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	2.7 V ~ 5.5 V
Current - Output / Channel:	30mA
Current - Supply:	850µA
Series:	--
Current - Input Bias:	10pA
Gain Bandwidth Product:	1.5MHz
Slew Rate:	0.4 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	Zero-Drift
Part Status:	Active
Packaging:	Tube

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AD8572ARUZ Application Field and Working Principle

The AD8572ARUZ is an integrated circuit from Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. The AD8572ARUZ low-noise, low-offset, low-power instrumentation amplifiers are ideal for precision applications. With dual voltage-feedback amplifier architectures, the AD8572ARUZ provides a wide range of gain and bandwidth combinations to offer a tailored solution for many amplified applications.The AD8572ARUZ ensures low-noise (3.0nV/√Hz) and low-offset (10μV to 5mV) performance while keeping the power consumption low (3.1mW/channel typ.) and the input voltage range high (common mode to 10V). In addition, the amplifier features a buffered output, a self-calibrating current-sensing circuit, and fast settling time.The AD8572ARUZ offers a wide array of performance and features suitable for low-power and high-precision applications, such as data-acquisition systems, medical devices, energy-monitoring systems, and automotive. With high input impedance and a wide common-mode input voltage range, it is ideal for monitoring high-resistance sensors and strain gages.

The Working Principle of AD8572ARUZ

The AD8572ARUZ is based on a Multi Stage Gain Amplifier (MSGA) topology. The amplifier has two stages such as a preamplifier and gain amplifier. The preamplifier usually has an adjustable gain and the gain amplifier allows selection of gain, bandwidth, and loading.The first stage of the amplifier is a differential stage of an instrumentation amplifier. It takes a differential input voltage and provides a differential output voltage that is proportional to the difference between the two inputs. The second stage consists of an operational amplifier in a feedback loop to determine the gain and bandwidth. The AD8572ARUZ also features an on-chip self-calibration option that can be used to reduce signal gain errors and further improve noise performance.The op amp has two input ports and one output port. At the input port, positive (Vin+) and negative (Vin-) are connected to existing signal source. Since it is used in negative feedback, the output terminals of the amplifier are also connected to its input terminal. The input current is converted into a voltage signal with given gain, and output voltage is larger than input voltage by the same amount of gain.In conclusion, the AD8572ARUZ is an ideal instrumentation amplifier thanks to its low-noise performance, low power consumption, and wide input voltage range. It allows for high-precision and low-power system designs. The MSGA topology enables a wide range of gain and bandwidth combinations, and it also offers a self-calibration circuit. These features combined make it a great choice for many applications.

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