AUTOMOTIVE ELECTRONICS


Key features of automotive- 


Figure 2: Central to iCoupler performance is a polyimide insulation layer that provides high thermal and mechanical stability. (Image source: Analog Devices, Inc.)


modern designs achieve wide bandwidths suitable for many power electronic applications.


Performance advantages of planar micro-transformers for 


iCoupler technology, developed by Analog Devices, represents an advancement in  feature planar micro-transformers with a typical diameter of approximately 0.5 millimeters (mm), enabling remarkably compact solutions. The small size also provides inherent resistance to external  Central to iCoupler performance is a polyimide insulation layer (Figure 2). This insulation provides high thermal and mechanical stability, making the device exceptionally durable. It can withstand surge voltages exceeding 10 kilovolts (kV) and offers long-term reliability when operating continuously at 400 volts root mean square (Vrms).


An essential feature of iCoupler technology is its ability to operate at high frequencies, supporting data transfers up to 150 megabits per second (Mbits/s). This is  signal encoding methodology. Data is encoded into 1 nanosecond (ns) pulses that enable fast data transfer and low power consumption, typically less than 1 milliampere (mA) per channel (Figure 3). Additionally, iCoupler devices incorporate  ensure clean signal transmission, enhancing performance in electromagnetically noisy automotive environments.


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iCoupler technology has been implemented in several devices, including  This AEC-Q100-compliant version of the  automotive environments. It has an isolation voltage of 3000 Vrms, an output offset voltage of ±6 millivolts (mV) (max) at 25°C, a gain error of ±0.5% (max), a bandwidth of 210 kilohertz (kHz), a gain drift of ±27 parts per million per °C (ppm/°C) (max), and an offset drift of -22 microvolts per °C (μV/°C) (typical). The device has a CMTI of 150 kV per microsecond (kV/μs) (typical), an operating temperature range of -40 to 125°C,  16-lead QSOP.


Voltage-sensing circuits for these applications must offer high bandwidth, low error and drift, and high common-mode transient immunity (CMTI) while meeting automotive standards like AEC-Q100.


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These features make the ADuM3195WBRQZ suitable for accurate, isolated voltage measurements in challenging automotive applications, including: • Voltage monitoring in battery management systems (BMSs)


• Feedback loops in power supplies • Inverter and motor drive systems The high accuracy, wide bandwidth, low power consumption, and robust isolation capabilities make the ADuM3195WBRQZ a particularly effective solution for voltage sensing in EV/HEV systems.


 inverters, DC/DC converters, and onboard chargers


 addresses critical challenges in EV/HEV power systems, including inverters, DC/DC converters, and onboard chargers.


 


JUNE 2025 | ELECTRONICS FOR ENGINEERS 21


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