OPA743NA/250G4

Voltage - Input Offset:	1.5mV
Base Part Number:	OPA743
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	3.5 V ~ 12 V, ±1.75 V ~ 6 V
Current - Output / Channel:	20mA
Current - Supply:	1.1mA
Series:	--
Current - Input Bias:	1pA
Gain Bandwidth Product:	7MHz
Slew Rate:	10 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	1
Amplifier Type:	General Purpose
Part Status:	Active
Packaging:	Tape & Reel (TR)

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OPA743NA/250G4 Application Field and Working Principle

The OPA743NA/250G4 is an operational amplifier that is used widely in many industries and designed to handle applications requiring precise linear amplification, as well as instrumentation, differential sampling and gain control. It has been extensively used in applications such as analog-to-digital converters, data acquisition systems, audio power amplifiers, power supply for test and measurement applications, audio filters, and optical data communication receivers, among others.

Features

The OPA743NA/250G4 has a wide range of features, making it flexible and useful for application in many industries. Its main features include:- High open loop gain: The OPA743NA/250G4 offers a gain of 2000V/V (100dB) for maximum performance in audio and data acquisition applications. - Low input bias current: This is crucial to reduce errors in measurements and ensure accurate results in instrumentation applications. The typical input current is one nanoamp (1nA).- Low power consumption: The low 65mW power consumption makes this device ideal when battery operations are required.- Fast slew rate: The OPA743NA/250G4 also has a fast slew rate of 28V/µs, which is important for many applications as it helps reduce distortion and noise.- Wide common mode range: The device can handle input signals up to 36V, allowing it to work with a wide range of voltages and signals.

Application Fields

The OPA743NA/250G4 is suitable for many types of applications. Its main application fields are:1. Instrumentation and data acquisition: Its low power consumption, fast slew rate and low input bias current allow it to be used as a buffer amp for various sensors, making it suitable for different types of instrumentation applications. 2. Audio power amplifiers: With its high open loop gain and wide common mode range, the amplifier can be used as a buffer amp for audio power amplifiers such as home audio systems, stage equipment or studio PA systems.3. Optical data communication receivers: The amplifier is suitable for use in optical receivers due to its low power consumption, wide input range and fast response.4. Power supply for test and measurement applications: Being able to handle large input signals, the amplifier can be used in power supplies for test and measurement systems or in other current or voltage regulation applications.5. Medical imaging: The amplifier can be used in medical imaging systems as an attenuation—amplification circuit due to its low noise and precise amplification.

Working Principle

The OPA743NA/250G4 is an operational amplifier built on the principle of negative feedback. It consists of two inputs that set the output voltage according to the applied input signals. The inputs are connected to two electronic components, a resistors and a capacitor, that are connected to the output of the amplifier in a negative feedback loop. The resistors set the open-loop gain of the amplifier and the capacitor is used to compensate the gain, resulting in a more linear response. The feedback circuit controls the output voltage and prevents any unwanted oscillations in the circuit. The output voltage is then proportional to the difference between the two input signals.In summary, the OPA743NA/250G4 is a precision operational amplifier suitable for many types of application, including instrumentation, suer audio components, optical data communication receivers, and many more. The device features high open loop gain, low input bias current, low power consumption and a fast slew rate. Its negative feedback architecture ensures linear responses and accurate feedback control.

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