HVFO108 High Voltage Fiber Optically-isolated Probe Key Features 150 MHz bandwidth 35 kV common-mode voltage rating The new HVFO108, with 150 MHz of bandwidth, is suitable for both (fiber optic isolation) Silicon and Silicon Carbide designs. It is designed to measure small signals floating on an HV bus and delivers excellent performance, has Superior Noise and Rejection 140 dB CMRR high CMRR, and provides optical isolation to reduce DUT loading. Low loop inductance Low attenuation Silicon Carbide Suitable Superior Noise Rejection Optical isolation reduces adverse The new HVFO108, with 150 MHz High CMRR (140 dB) provides more loading of DUT of bandwidth, is perfect for device accurate representation of the research engineers designing Silicon measured signal despite the presence Selectable tips from 1V to 40V and Silicon Carbide devices, and of high dV/dt or dA/dt events elsewhere Applications system development engineers in the circuit. The test lead is optimized Upper-side gate drive signal incorporating Silicon Carbide devices. to limit loop inductance and radiated measurements pickup. Tip attenuations are optimized Floating control signal or sensor Optical Isolation is Best for a wide range of signal amplitudes. voltage measurements Optical isolation between the probe EMC, EFT, ESD, and RF immunity tip and the oscilloscope input ensures Applications testing and system optimization safety against dangerous high voltage The HVFO108 is ideal for upper-side Any small signal measurements levels, reduces adverse DUT loading, gate drive measurements, floating with high common-mode voltage provides faithful pulse response, and control signal or sensor voltage increases measurement confidence. measurements, EMC/EFT/ESD/ RF immunity testing and system Compact, Simple, Affordable optimization, or any small signal The HVFO108 fits into tight spaces measurements with high common- as well as tight budgets, without mode voltage. sacrificing performance.OPTIMIZED FOR SMALL SIGNAL FLOATING MEASUREMENTS The HVFO108 faithfully reproduces upper-side gate drive signals without loading and distortion, allowing a clear view of the Miller effect. AC and DC sensor signals floating at a high v oltage or in the presence of EMC, EFT, ESD, and RF disturbance signals can be acquired with high signal fidelity and correctly correlated to in-circuit and control activities. The HVFO108 architecture is simple - a single laser and fiber optic cable is used for optical isolation and modulated signal + data communication, and multiple tips achieve different operating voltage ranges. Selectable Attenuating Tips Use one of five available tips for Amplifier/Modulating Transmitter voltages from 1V to 40V A frequency modulating optical transmitter is used for signal and data transmission across a fiber Built-in Safety optic cable. Flexible Connection to DUTs The USB micro-B interface Simplified pin socket termination for also serves as the connection connection to square pins, solder-in for the attenuating tip to Battery-powered terminals, or grippers.. preclude charging during A long-life Li-Ion battery provides circuit connection. power for ~6 hours of use. Re-charging is via a standard USB micro-B charging interface. Coaxial Signal Connection A noise immune coaxial cable (blue) is used to connect to the voltage De-modulating Receiver Fiber Optic Cable signal. The optical signal is received A 1m long cable is provided and demodulated to an electrical (a 6m long cable is optional). output to the oscilloscope with Even longer cables may be Reference and Shield Connection correct voltage scaling. supplied by the user. Separate connections are provided for Shield (black/grey) and Reference (green). The Reference wire carries the signal return current and the Shield carries current associated with the stray parasitic capacitances. 2