Skyworks SI8920BC-IPR Galvanically Isolated Analog Amplifier For Current Shunt Measurement
Shenzhen Mingjiada Electronics Co., Ltd., as a professional electronic component supplier, currently offers the Skyworks SI8920BC-IPR electrically isolated analogue amplifier. This product is specifically designed for current shunt measurement and is suitable for diverse applications including industrial, automotive, and renewable energy sectors.
【SI8920BC-IPR Product Overview】
The SI8920BC-IPR is an electrically isolated analogue amplifier engineered for high-noise environments and applications with elevated common-mode voltages. Employing advanced capacitive isolation technology, it integrates high-performance isolation capacitors directly onto the semiconductor wafer. This enables precise analogue signal transmission while delivering effective electrical isolation. This approach combines high bandwidth with exceptional noise rejection, enabling the SI8920BC-IPR to excel in industrial automation, power transmission, and motor control applications.
The SI8920BC-IPR's low-voltage differential input is ideally suited for measuring voltage across current-shunt resistors or in scenarios where sensors must interface with control systems.
The SI8920BC-IPR outputs a differential analogue signal, offering selectable gain of 8.1× or 16.2×.
The SI8920BC-IPR is housed in an 8-pin DIP package and supports surface-mount technology.
【SI8920BC-IPR Key Performance Parameters】
Low signal delay: Just 0.75μs, enabling control systems to respond rapidly to faults or load changes
High precision: Input offset voltage 0.2mV, gain error <0.5%
Exceptional temperature stability: Offset drift 1μV/℃, gain drift 10ppm/℃
High noise immunity: Noise of only 0.10 mVrms within 100 kHz bandwidth, with common-mode transient immunity up to 75 kV/μs
Operating temperature range: -40°C to 125°C, suitable for demanding environments
【SI8920BC-IPR Features and Advantages】
High Common-Mode Rejection Capability
A standout feature of the SI8920BC-IPR is its exceptional Common-Mode Rejection Ratio (CMRR), which measures the device's ability to suppress common-mode noise at both input terminals. In industrial settings with fast-switching noise (e.g., frequency converters, motor drives), high CMRR is crucial. It ensures accurate extraction of minute differential voltage signals (such as voltage drops across shunt resistors) amidst high common-mode noise, thereby guaranteeing precise current measurement.
Outstanding Accuracy and Stability
The SI8920BC-IPR excels in accuracy, featuring an input offset voltage of merely 200µV. This characteristic is vital for measuring small voltage signals, as even minute offsets can introduce significant measurement errors after amplification. Concurrently, the device exhibits a low temperature drift coefficient, ensuring stable performance across the broad industrial temperature range of -40°C to +125°C. This temperature stability is particularly vital for industrial applications with fluctuating environmental conditions, enabling reliable operation without complex temperature compensation circuits.
Compact Packaging and Ease of Use
The SI8920BC-IPR utilises an 8-DIP surface-mount package. This design not only saves PCB space but also provides excellent soldering reliability and thermal performance. As an isolated IC, it integrates signal amplification and electrical isolation within a single device, simplifying circuit design, reducing external component count, and lowering overall system complexity and cost. Its surface-mount characteristics also align with automated assembly processes in modern electronics manufacturing, enhancing production efficiency.
Safety Certification and Reliability
As an industrial-grade product, the SI8920BC-IPR complies with the AEC-Q100 automotive electronics standard, demonstrating its capability to withstand demanding environmental conditions. Although specific isolation voltage ratings are not explicitly stated in the search results, its technical characteristics indicate the device provides industrial-standard electrical isolation. This ensures safe separation between high-voltage and low-voltage circuits, which is critical for the secure operation and regulatory compliance of industrial equipment.
【SI8920BC-IPR Application Domains】
Motor Drives and Servo Systems: In modern industrial drives, precise phase current detection is vital for implementing efficient motor control algorithms such as field-oriented control. The SI8920BC-IPR can detect three-phase motor currents, providing real-time feedback for control loops. Its high common-mode rejection capability withstands fast-switching noise common in motor drives (e.g., from IGBT/MOSFET switching), ensuring control precision and stability.
Inverters and UPS (Uninterruptible Power Supply): The SI8920BC-IPR data sheet explicitly lists its target applications as inverters and UPS systems. Within these applications, it can detect DC bus current or output AC current to implement overcurrent protection, load monitoring, and power calculation. For instance, within solar inverters, accurate measurement of DC input current and AC output current optimises power conversion efficiency and ensures safe system operation.
Power Management and Power Conversion: Precise current sensing forms the foundation for overcurrent protection, power limiting, and current-mode control in Switching Mode Power Supplies (SMPS), servo drives, and other power conversion systems. The SI8920BC-IPR withstands the high common-mode voltages and noisy environments common in these applications, delivering a reliable current monitoring solution.
Industrial Automation and Process Control: Within industrial automation systems, monitoring the current of various motors, actuators, and heating elements is critical for process monitoring, fault prediction, and preventive maintenance. The SI8920BC-IPR's wide temperature range capability enables it to withstand harsh industrial environments, ensuring long-term stable system operation.
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