OP4200 User Manual OPAL-RT Technologies 25
OP4200 HARDWARE - CASSETTES
OP4240-1 16 ANALOG INPUTS
OP4240-1 16 ANALOG INPUTS
FEATURES
• 16 differential analog input channels
• All inputs are sampled simultaneously for additional simulation accuracy. They can be sampled up
to 400 KS/s
• 16 bit resolution
• ±20V input range
DESCRIPTION
The OP4240-1-1 module provides 16 differential analog input channels. Each channel uses a 16-bit
resolution analog-to-digital converter. By default, the maximum input signal is set to ±20 volts.
SCHEMATICS
Figure 3 represents a simplified schematic of one channel of the OP4240-1 modules. It is composed of
three stages: the first stage consists of one operational amplifier that works in differential input mode
and permits gain adjustment; the second stage, the level shifter, forms the signal for the A/D converter
input; the third stage occurs after the conversion to the digital type, as the signal is sent to the carrier
board.
Serial Data Out
A / D ConverterLevel ShifterDifferential Amplifier
V in
-
+
VIN
OUT
REF
-
+
VREF
VREF
Figure 16: Figure 3: Differential input ADC circuit
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