The OP5353 features 32 optically isolated input channels that operate in the 4-50V voltage range.
- 32 optically isolated input channels
- 4V to 50V input voltage range
- 30V maximum reverse protection
- 3.6mA current threshold
- All inputs are sampled simultaneously, at up to 10 MSPS
- Choice of sink or source input connections (anode and cathode side signals available)
The optically isolated inputs accept a wide input voltage range, from 4 to 50 Volts. They have a low threshold current; typically 3.6 mA. Each input has reverse voltage protection of up to 30 Volts provided by a Schottky diode.
The schematic below represents the electrical circuit of one channel, from the Din+/Din- input signals coming for the unit under test (on the right) to the Din_FPGA signal going to the FPGA processor of the real-time simulator (on the left).
- When current flows from Din+ to Din-, the output of optocoupler (A) is low and the Din_FPGA signal is low.
- When no current flows, the optocoupler output (A) is high and the Din_FPGA signal is high.
- Both Din+ and Din- pins (anode and cathode sides) are routed to the DB37F connector of the simulator and made available to the user.
- The maximum current is 3.6mA
Typical Use Cases
The circuit makes it possible to use the module for activation or open-circuit detection, both in the high or low active state.