Skyworks Solutions Inc. Si892x Isolated Amplifiers are designed for low-voltage, differential signals, and are suitable for connection to low resistance current shunt measurement resistors. These galvanically isolated analog amplifiers offer 0.8µs low signal delay that allows control systems to respond quickly to fault conditions or changes in load. The Si8921 provides a differential output voltage while the Si8922 provides a single-ended output voltage. The Si892x modulates the analog signal in a unique way for transmission across the semiconductor-based isolation barrier. The low-voltage differential input is ideal for measuring a voltage across a current shunt resistor or for any place where a sensor must be isolated from the control system. The output is a differential analog signal amplified by either 8.2x or 32.8x. The low offset and gain drift ensure that accuracy is maintained over the entire operating temperature range. Typical applications include industrial, HEV, and renewable energy inverters, AC, brushless, and DC motor controls/drives, automotive onboard chargers, battery management systems, and charging stations.
