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OP5340 - 16 Analog Input - 0.4 MSPS

The OP5340-1 module provides 16 differential analog input channels, sampled at up to 400 kS/s, for measuring ±20V input signals.

An 8-channel version of the module previously available, the OP5340-2, is now discontinued.

Main Features

  • 16 analog input channels

  • 16-bit resolution

  • Simultaneous sampling at 400 kS/s

  • Voltage range ±20V

  • Factory-calibrated

Channel description

The OP5340-1 module uses eight 16-bit dual-channel analog to digital converters. The figure below represents a simplified schematic of one channel. It is composed of three stages:

  • the first stage consists of one operational amplifier that works in differential input mode and allows gain adjustment; 

  • the second stage, the level shifter, adapts the signal for the A/D converter input; 

  • the third stage consists of the conversion by the A/D converter of the input signal into a digital signal, which is transferred via the carrier board to the FPGA chip of the real-time simulator.

Voltage range

The default voltage range is ±20V. This value is obtained by using two resistor values, R1 and R2, to form the input stage :

The Vout value at the output of the amplifier is then obtained by the formula : 

In order to keep the Vout range at ±1 V,  which maximizes the precision of the measurement, the resistor values are set to R1 = 499 kΩ and R2 = 25 kΩ :

The channel gain obtained with the default R1, R2 values is thus 1/20 :


  • The card is factory-calibrated to ensure accurate output values with a maximum of ±20 mV absolute error on noise and offset.

For compatibility of this card, please consult the Software compatibility and Hardware compatibility tables.


OPAL-RT TECHNOLOGIES, Inc. | 1751, rue Richardson, bureau 1060 | Montréal, Québec Canada H3K 1G6 | | +1 514-935-2323