GX2475 - New ProductHigh Voltage Dual Channel Digitizer PXI Card

High Voltage Dual Channel Digitizer

3U High Voltage, Dual Differential Channel, 14-bit digitizer
  • Two Channel, 14 Bit Digitizer
  • Differential or Single Ended Inputs
  • DC to >30 MHz Analog Bandwidth
  • 150Vpp, 300Vpp, 600Vpp full scale ranges
  • AC or DC Coupling
  • Excellent Dynamic Range and Low Distortion
  • 3U PXI Instrument
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The GX2475 is a high performance, dual differential channel, 14-bit digitizer offering high dynamic range. The module’s differential inputs, coupled with 14 bits of resolution makes it an ideal instrument for acquiring and analyzing high voltage signals. Each channel offers 3 selectable low pass filters, a 14 bit, 70 MS/s ADC, and 512K of memory.  A 50 MHz or 70 MHz clock with a divider provides a common acquisition clock source for both channels.


The GX2475 provides two differential inputs providing the ability to make low level measurements in the presence of common mode or noisy signals. The inputs can also be configured for single-ended operation. Each channel supports AC or DC coupling. Each channel can also add an offset to the input signal, providing the ability to maximize the A to D’s dynamic range.

Both channels offer three, 3-pole, low pass, butterworth filters offering the ability to band limit signal noise and minimize aliasing effects. The filters and also be bypassed to take advantage of the input amplifier’s full bandwidth.

Clocking of the digitizer is provided by an external input or an internal 10 MHz, 50 MHz or 70 MHz clock which can be divided by 1 to 256. Each channel can be independently triggered to start a measurement from an external or internal source.

Programming and Software

The GX2475 is supplied with a virtual instrument panel, which includes a 32-bit DLL driver library and documentation.  The virtual panel can be used to interactively adjust and control the instrument from a window that displays the current instrument’s current settings and measurements.


  • Automotive testing
  • Data Acquisition
  • Medical device and module test
  • ATE systems



GX2475 3U High Voltage, Dual Differential Channel, 14-bit digitizer
GX92104 SMB plug to BNC-M cable, 36 inches (RG188 cable)




Input Chanels 4 analog (A+, A-, B+, B-)
1 external clock, 1 external trigger
Input Connectors SMB
Format PXI, 3U single slot
A/D Converter
Resolution 14 bits
Sampling Rate 500 KS/s to 70 MS/s
Clock Source External or Internal
Internal Clock 70 MS/s, or 50 MS/s, +/-100 ppm
Clock Divider 1 to 256
Memory 512K samples per channel
Analog Input Channels
Input Configuration Differential or single-ended
Input Range 150Vpp, 300Vpp, 600Vpp
Maximum Input +/- 350 Vp, (input + common mode)
Common Mode Range +/- 350 volts for 75Vp, 150Vp, 300Vp ranges
Dc Offset +/- 347 volts for 75Vp, 150Vp, 300Vp
Input Impedance 1 M Ω
Resolution 1 Hz
Accuracy +/- (50 mV + 0.2% of range) for 150 Vpp, 300 Vpp, 600 Vpp
Relative Accuracy +/- 0.025% of range
Bandwidth >30 MHz
Frequency Response(no filter)
rerenced to 500 kHz
+/- 0.5 dB, DC to 10 MHz+/- 2 dB, 10 MHz to 30 Mhz
Low Pass Filters 3-pole Butterworth, selectable:
None, 6 MHz, 15 MHz, 30 MHz
Chanel Crosstalk < 80 dB at 1 MHz
SFDR 80 dB, 1 MHz input
72 dB, 10 MHz input
(50 MS/s, 2 Vpp signal)
SINAD 68 dB, 1 MHz input
64 dB, 10 MHz input
(50 MS/s, 2 Vpp signal)
External Clock
Connector Front panel SMB
Input Impedance 50 Ω nominal
Maximum Frequency 100 MHz, divisible by 1 to 256
Threshold Level TTL
Output Impedance 50 Ω
Output Level V Lo: <.5 volts, V HI > 4.5 volts,
no load
Connector Front panel SMB
Impedance 10K Ω nominal
Threshold Level TTL
Sources Front panel, PXI trigger 0 -5, PXI Star
trigger, software trigger, input signal
Modes Positive / negative level or edge,
positive / negative edge continuous
Current Consumption (Max) +5 V @ 650 mA
+12 V @ 40 mA
-12 V @ 40 mA
+3.3 V @ 300 mA
Weight Approx. 210 grams
Size 3U, single slot
Temperature Operating 0° C to 50° C
Temperature Storage 0° C to 70° C
10% to 80%


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