OPA2228UA

The OPA2228UA is a monolithic operational amplifier designed for use in instrumentation, light industrial, medical and consumer systems. Utilizing the latest in complementary bipolar and CMOS silicon technology, the OPA2228UA has identical performance characteristics at both high and low supply voltages. It features precision level accurate gain and input offset correction, low power, high speed, and low noise characteristics.

Instrumentation is any device or system that measures, records, and displays a quantity or parameter of interest. The OPA2228UA can be used to upgrade an existing system or build a new instrumentation system for testing electrical systems and components. It is used in applications such as data acquisition and signal processing boards, power supplies, digital converters, and audio systems.

The OPA2228UA offers a wide array of features suited for instrumentation: low noise (1nV/sqrt Hz the input noise voltage), high bandwidth (50 MHz), low power (100uA) operation, and Rail-to-Rail input and output capability. It is well suited for powering transducers, such as thermocouples, RTDs, and pressure transducers. It also has a low input bias current of 2pA, which makes it suitable for low level analog signal conditioning.

The working principle of an operational amplifier is based on negative feedback, which links the output of an amplifier to its input. A typical op-amp circuit consists of an input stage, which receives the input signal and amplifies it; an output stage, which amplifies and provides the output; and a feedback loop, which compares the output to the input and adjusts the gain accordingly. The gain of the amplifier is determined by the ratio of its negative feedback resistor Rf and its input resistor Ri.

The OPA2228UA is a low power, precision instrumentation amplifier providing high-accuracy voltage and current amplification in a small form factor. Its rail-to-rail input and output ranges make it well suited for low-level precision signal conditioning. It also features high accuracy level gain set and input offset correction, low power consumption, high speed, and low noise characteristics, making it suitable for many instrumentation applications, including transducer amplifier systems, power supplies, digital converters, and audio systems.