Active Differential Probe

The ADF25A is an active differential oscilloscope probe. The probe permits the measurement of signals which are not referenced to earth using a conventional earthed oscilloscope. This enables mains voltages to be tested. It is possible to measure and observe the waveforms of three phase supplies or the gate / control signals of semiconductor circuits. It is ideal for investigation of motor speed controls, uninterruptible power supplies, switch mode power supplies and process controllers.

Bandwidth	dc to 25MHz (-3dB)
Accuracy	± 2%
Rise time:	14ns
Input impedance	4M Ohm / 5.5pF each side to ground
Attenuation Ranges	10:1 / 100:1
Input Voltage (Differential Range)	± 70V (DC+Peak AC) or 70Vrms@1/10 ± 700V (DC+Peak AC) or 700Vrms@1/100
Input Voltage (Common Mode Range)	± 700V (DC+Peak AC) or 700Vrms@1/10 & 1/100
Input Voltage (Absolute Max. Voltage)	±1400V(DC+Peak AC) or 1000Vrms CAT III @ 1/10 & 1/100
(Differential or Common Mode) Output -Swing	±7V (into 2k Ω load)
(Differential or Common Mode) Output -Offset (typical)	<±5mV
(Differential or Common Mode) Output -Noise (typical)	0.7mVrms
(Differential or Common Mode) Output -Source Impedance (typical)	1Ω @1kHz, 8 Ω @ 1MHz
CMRR (typical)	-86dB 50Hz, -66dB @20kHz
Ambient Operating Temperature	-10 to 40°C
Ambient Storage Temperature	-30 to 70°C
Ambient Operating Humidity	25-85% RH
Ambient Operating Humidity	25-85% RH
Length of BNC Cable	95cm
Length of Input Leads	45cm
Dimensions (LxWxH)	170mm x 63mm x 21mm
Power requirements	4 x AA cells or 6V / 60mA dc mains adapter