MOIP1200P SigOFIT probe head

Description

The Micsig MOIP1200P is a 1.2 GHz optically isolated probe for high-voltage floating measurements on wide-bandgap power devices. It is the flagship of the MOIP series and is built on Micsig's third-generation SigOFIT™ optical isolation technology.

SiC and GaN devices switch in nanoseconds. Bus voltages are rising, and common-mode interference is harder to control. Conventional high-voltage differential probes struggle to combine bandwidth, common-mode rejection and safety.

The MOIP1200P takes a different approach. The probe head converts the signal to light, sends it over optical fiber and converts it back to an electrical signal at the oscilloscope. The head runs on a laser-powered supply. The device under test and the oscilloscope are fully isolated, so ground loops are eliminated.

Key Features

• Bandwidth: 1.2 GHz
• Rise time: ≤ 350 ps
• Common-mode rejection ratio: Up to 180 dB at DC; 106 dB at 1.2 GHz
• Common-mode voltage: Up to 85 kVpk
• Input capacitance: As low as 1 pF
• Differential measurement range: ±0.01 V to ±20 kV (with optional attenuator heads)
• Noise: < 0.45 mVrms
• DC gain accuracy: Better than 1%
• Output interface: BNC, compatible with oscilloscopes of all brands
• Operation: Zero temperature drift, no manual calibration, 365 × 24 continuous testing

Advantages

• See the real switching edge: 1.2 GHz bandwidth and ≤ 350 ps rise time capture the fastest GaN switching transitions.
• Clean high-side waveforms:106 dB CMRR at 1.2 GHz suppresses the high-frequency common-mode oscillation that distorts floating measurements.
• No ground loops: Optical isolation removes the electrical path between your circuit and your oscilloscope.
• Headroom for higher bus voltage: 85 kVpk common-mode voltage covers demanding high-voltage designs.
• Minimal circuit loading: 1 pF input capacitance does not disturb sensitive nodes such as GaN gate drivers.
• One probe, wide range: rift and no manual calibration support long, uninterrupted test runs.
• Fits your existing setup: Standard BNC output works with oscilloscopes from any manufacturer.

The SigOFIT Gen 3 series is engineered to meet the highest safety and performance standards, providing engineers with a reliable solution for precise differential measurements in challenging high-voltage and high-frequency environments.