OPA171AQDBVRQ1

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OPA171AQDBVRQ1 Application Field and Working Principle

The OPA171AQDBVRQ1 amplifier is a high current, low output voltage, low power, low noise operational amplifier with rail-to-rail inputs and outputs. It is ideal for a variety of applications such as instrumentation and signal conditioning in the information technology and medical equipment markets. It is well-suited for use in applications where low-power and low-voltage operation is desired such as low power, low output voltage instrumentation, embedded systems and medical diagnostic systems.

Features

• Low noise: Typ. 0.7 nV/√Hz
• Low offset: Typ. 75 uV
• Rail-to-rail input and output
• Low power: DIP: 2 mW, SOP: 1.8 mW
• Input common-mode voltage range: 0.1 V below GND to 7 V above V+
• High current output: 90 mA (max)
• High slew rate: 4 V/µs (min)
• Low input bias current: 1 nA (max.)
• Low output voltage: 1.3 V (typ.)

Applications

The OPA171AQDBVRQ1 is well suited to instrumentation, signal conditioning and embedded systems applications such as:

• Low power, low output voltage instrumentation
• Electronic test and measurement systems
• Medical diagnostic systems
• Embedded systems
• Motor control systems
• Data converters
• Sensing circuits

Working Principle

The OPA171AQDBVRQ1 is an operational amplifier (op-amp) based on the principle of negative feedback. It is a voltage follower circuit with two inputs, the non-inverting (positive) and inverting (negative) input. The amplifier is biased by an internal current source and the moveable terminal of a potentiometer. The input biasing current is set by an external current source. The output voltage of the amplifier is directly proportional to the difference in voltage between the two inputs. If the two inputs are equal, the output voltage will be zero. When the non-inverting input signal is increasing and the inverting input signal is decreasing, the output voltage increases. Conversely, when the non-inverting input signal is decreasing and the inverting input signal is increasing, the output voltage decreases.

The OPA171AQDBVRQ1 amplifier is designed to be used in systems requiring low power and low voltage operation. It has an extremely low offset voltage, making it ideal for use in precision measurements and low-noise signal conditioning applications. The amplifier also features rail-to-rail inputs and outputs, allowing for maximum accuracy and flexibility when working with a wide range of input and output voltages.

The amplifier is available in two packages: a 4-pin SOP package and an 8-pin DIP package. The SOP package is suitable for applications where board space is limited and minimum feedback capacitance is required. The DIP package is preferred for applications which require a greater degree of flexibility.

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