OPA350PA

OPA350PA is an advanced, low power consumption, 2-output, rail-to-rail operational amplifier (op-amp). Developed by Texas Instruments (TI), OPA350PA is often referred to as an “operational transconductance amplifier” or OTA, because it is a kind of amplifier which is basically a transistor type that directly absorbs current rather than voltage.

The OPA350PA was designed to interface with low voltage analog-to-digital and digital-to-analog converter (AD/DA) systems. It is mainly used for a variety of audio, data acquisition and control applications in instrumentation, medical devices and consumer electronics equipment. OPA350PA has a rail-to-rail input and output, excellent common-mode rejection ratio and a low-distortion output.

Applications of OPA350PA

The OPA350PA device can be used in several applications that require a high input resistance and precision. Some of these applications are:

• Portable or battery-powered instrumentation equipment
• Low noise audio signal amplification
• Programmable gain amplifiers (PGA)
• Varactor biasing and control
• Transducer amplifiers
• Low frequency voltage to frequency converter (VFC)
• Pulse width modulation (PWM) amplifiers
• Proportional integral derivative (PID) controlled closed loop systems

Working Principle of OPA350PA

The primary working principle of an OPA350PA is to provide a high input resistance and precision amplification of a small signal (microvolts to millivolts). It is a kind of device that directly absorbs current rather than voltage, and it is mainly used in low-noise signal amplification, ground loop elimination, and other various instrumentation tasks.

The OPA350PA device consists of three stages, a differential input stage, a common-mode feedback amplifier and a low-noise output stage. The differential input stage receives a small differential signal, amplifies and filters it, resulting in an amplified analog signal. This amplified signal is then sent to the common-mode feedback amplifier where the common-mode signal gets rejected and the signal is converted to a higher gain differential signal. Finally, the signal is passed through the low-noise output stage where the signal gets amplified and the gain of the opamp is adjustable.

The OPA350PA also has excellent common-mode rejection ratio, great thermal stability and drift, excellent paralleling and yield performance, and low/high supply voltage range. This makes it ideal for use in various audio, data acquisition, control, and instrumentation systems.

Overall, the OPA350PA is a low power consumption, 2-output, rail-to-rail operational amplifier designed for low voltage applications. It can be used for a variety of audio, data acquisition and control applications in instrumentation, medical devices, and consumer electronics equipment.