Description

The SigOFIT MOIP100P (MOIP01P) fibre optic isolated probe allows the measurement of low and high voltages with a bandwidth of 100 MHz and a common mode of up to 60 kVpk. For example, a gate signal on a high-side FET or IGBT can be measured at 600 V or even 1200 V.

With Micsig's exclusive SigOFIT™ optical isolation technology, the SigOFIT probe is powered by a laser and delivers extremely high CMRR and isolation voltage, unlike conventional differential probes that can only test high voltage signals.unlike conventional differential probes that can only test high voltage signals, the SigOFIT probe can be used with different attenuation peaks to test differential signals with voltage ranges from ±1.25V to ±6250V, achieving a full measurement range and a very high signal-to-noise ratio. Third-generation semiconductor devices such as SiC and GaN can switch high voltages in a few nanoseconds, which contain very high-energy, high-frequency harmonics. With the use of high quality coaxial attenuation tips and industry standard MCX & MMCX connectors, SigOFIT probes perfectly suppress oscillations caused by high frequency common mode noise. Automatic calibration is completed in less than 1 second and ensures accurate signal output in real time.

In addition, the MOIP100P probe has a very low input impedance of < 3 pF, a very high common mode rejection ratio of up to 128 dB and a very accurate DC gain of 1 %.

Features

Supports all BNC oscilloscopes
Exchangeable attenuation tips
Gain function 0dB/20db to measure small signals
Up to 100 MHz bandwidth
180 dB CMRR at DC
over 128 dB CMRR at 100 MHz
60 kVpk common mode voltage range
Up to ±6250V differential input voltage range
1% DC gain accuracy
Autozero calibration in less than 1 second

Application areas

Design of motor drives and power converters
Design of GaN, SiC, half/full bridge devices
Design of inverters, UPS and switching power supplies
Safety testing for high voltages and high bandwidths
Evaluation of power devices
Current shunt measurements
EMI and ESD troubleshooting
Floating measurements

Further information

CMRR

The SigOFIT probe has a high common mode rejection ratio (CMRR) of up to 128dB at 100MHz and over 108dB at 1GHz.

GaN suitable

The Micsig SigOFIT probes were developed specifically for GaN and similar applications. To meet the high requirements, the measuring leads are short and the input capacitance is less than 3pF input capacitance.

High accuracy

The SigOFIT probe has excellent amplitude-frequency characteristics and the accuracy of the DC gain is better than 1 %. The maximum noise floor within the range is <450μVrms, and the zero drift is less than 500 μV after warm-up.

For third generation semiconductors

SiC and GaN devices can switch high voltages in a few nanoseconds and the signal can exhibit high-energy, high-frequency harmonics.

Productvideo

Advantages of optical insulation

Technical Data

Model comparison	MOIP100P	MOIP200P	MOIP350P	MOIP500P	MOIP800P	MOIP1000P
Bandwidth	100 MHz	200 MHz	350 MHz	500 MHz	800 MHz	1GHz
Rise time	≤3.5 ns	≤1.75 ns	≤1ns	≤700 HP	≤438ps	≤350 HP
SMA input impedance	1MΩ; \|\| 10pF	1MΩ; \|\| 10pF	1MΩ; \|\| 10pF	1MΩ; \|\| 10pF	1MΩ; \|\| 10pF	1MΩ; \|\| 10pF
Output voltage	±1,25V	±1,25V	±0,5V	±0,5V	±0,5V	±0,5V
Differential voltage range	1X: ±1.25 V 2X: ±2.5V 10X: ±12.5V 20X: ±25V 50X: ±62.5V 500X: ±625 V 1000X: ±1250V 2000X: ±2500V 5000X: ±6250V	1X: ±1.25 V 2X: ±2.5V 10X: ±12.5V 20X: ±25V 50X: ±62.5V 500X: ±625 V 1000X: ±1250V 2000X: ±2500V 5000X: ±6250V	1X: ±1.25 V 2X: ±2.5V 10X: ±12.5V 20X: ±25V 50X: ±62.5V 500X: ±625 V 1000X: ±1250V 2000X: ±2500V 5000X: ±6250V	1X: ±0.5V 2X: ±1V 10X: ±5V 20X: ±10V 50X: ±25V 500X: ±250V 1000X: ±500V 2000X: ±1000V 5000X: ±2500V 1000X: ±5000V	1X: ±0.5V 2X: ±1V 10X: ±5V 20X: ±10V 50X: ±25V 500X: ±250V 1000X: ±500V 2000X: ±1000V 5000X: ±2500V 1000X: ±5000V	1X: ±0.5V 2X: ±1V 10X: ±5V 20X: ±10V 50X: ±25V 500X: ±250V 1000X: ±500V 2000X: ±1000V 5000X: ±2500V 1000X: ±5000V
Noise	<450μVrms	<450μVrms	<450μVrms	<450μVrms	<450μVrms	<450μVrms
Propagation delay	15.42 ns (2 m cable length)	15.42 ns (2 m cable length)	15.42 ns (2 m cable length)	15.42 ns (2 m cable length)	15.42 ns (2 m cable length)	15.42 ns (2 m cable length)
Power supply	USB type-C, DC: 5 V	USB Type-C, DC: 5 V	USB Type-C, DC: 5 V	USB Type-C, DC: 5 V	USB Type-C, DC: 5 V	USB Type-C, DC: 5 V
DC amplification accuracy	1 %	1 %	1 %	1 %	1 %	1 %
Common mode voltage range	60kVpk	60kVpk	60kVpk	60kVpk	60kVpk	60kVpk
CableLength	2 M (Std.) (customisable)	2 M (Std.) (customisable)	2 M (Std.) (customisable)	2 M (hrs.) (customisable)	2 M (hrs.) (customisable)	2 M (hrs.) (customisable)

Specification attenuators

Probe tip	Attenuation	Differential voltage range (MOIP100P/200P/350P)	Differential voltage range (MOIP500P/800P/1000P)	Input impedance
OP10	1X/10X	±1.25V / ±12.5V	±0.5V / ±5V	10 MΩ / 3.0 pF
OP20	2X/20X	±2.5V / ±25V	±1V / ±10V	9.47 MΩ / 2.8 pF
OP50	5X/50X	±6.25V / ±62.5V	±2.5V / ±25V	9.47 MΩ / 2.8 pF
OP500	50X/500X	±62.5V / ±625V	±25V / ±250V	12.27 MΩ / 2.6 pF
OP1000	100X/1000X	±125V / ±1250V	± 50V / ± 500V	12.28 MΩ / 2.6 pF
OP2000	200X/2000X	±250V / ±2500V	± 100V / ± 1000V	30 MΩ / 1 pF
OP5000	500X/5000X	±625 / ±6250V	± 250V / ± 2500V	40.92MΩ / 1pF
OP10000	1000X/10000X	N.A.	± 2500V / ± 5000V	40.82MΩ / 2.4pF