Skyworks Solutions Inc. Si8920 Isolated Amplifiers
Skyworks Solutions Si8920 Isolated Amplifiers are galvanically isolated analog amplifiers. Their low-voltage differential input is ideal for measuring the 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 8.1x or 16.2x.
The very low signal delay of the Si8920 allows control systems to respond quickly to fault conditions or changes in load. Low offset and gain drift ensure that accuracy is maintained over the entire operating temperature range. Exceptionally high common-mode transient immunity means that the Si8920 delivers accurate measurements even in the presence of high-power switching, as is found in motor drive systems and inverters.
The Si8920 isolated amplifier utilizes Skyworks proprietary isolation technology. It supports up to 5.0kVrms withstand voltage per UL1577. This technology enables higher performance, reduced variation with temperature and age, tighter part-to-part matching, and longer lifetimes than other isolation technologies.
Features
- Low voltage differential input
- ±100mV and ±200mV options
- 0.75μs low signal delay
- 0.2mV input referred offset
- 1% gain error
- Excellent drift specifications
- 1μV/°C offset drift
- 100ppm/°C gain drift
- 0.2% full-scale nonlinearity
- Low noise (0.25mVrms over 100kHz bandwidth)
- High common-mode transient immunity: 75kV/μs
- Compact packages
- 16-pin wide-body SOIC
- 8-pin surface mount DIP
- -40 to 125°C
- AEC-Q100
Applications
- Industrial, HEV, and renewable energy inverters
- AC, Brushless, and DC motor controls and drives
- Variable speed motor control in white consumer goods
- Isolated switch mode and UPS power supplies
Block Diagram
Evaluation Kit
Skyworks Solutions Inc. Si8920 Development Kit
Si8920 Development Kit is used for developing Si8920 Isolated Amplifiers.
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