32 digital input/output channels divided in 4 banks of 8 channels, each bank being configurable as inputs or outputs by software, TTL 3.3/5 V
16 analog inputs at 5 MSPS simultaneous sampling, ± 10 V, 16-bit resolution
16 analog outputs at 10 MSPS simultaneous sampling, ± 10 V, 16-bit resolution
Digital Input-Output Description
There are 32 digital IOs that are sampled/generated simultaneously up to 50 Mb/s. They are divided in 4 groups of 8. Each group can be configurable in direction through software. Also, the voltage of each group can be configurable independently for 3.3V-LVTTL or 5V-TTL.
Each channel implements the circuit shown below:
DIO Simplified Circuit
TTL signals are not recommended for long-distance data transmission. We recommend using this board with cable lengths no longer than 1.5 meters (5 ft). When using longer lengths, OPAL-RT recommends terminating the lines to avoid over/undershoots. The OP8320 can help to implement the termination. Also, refer to Simulator EMC cable recommendations to design a cable that meets required performance.
Analog Input Description
Each channel uses a 16-bit resolution analog-to-digital (ADC) converter. Each ADC can sample up to 5 MS/s, all channels being simultaneously sampled.
The figure below represents a simplified schematic of the input stage. The first filter removes excessive noise. The signal is then attenuated to bring the voltage within the range required by the ADC converter. The input can be used single-ended (±10 V) with the AIN_N being connected to GND or can be used in fully differential mode (±10 V-diff) with a ±5 V common-mode rejection.
AIn Simplified Circuit
Factory calibration is done only in single-ended mode.
Analog Output Description
Each channel uses a 16-bit resolution digital-to-analog (DAC) converter. Each DAC can generate up to 10 MS/s, all channels being simultaneously generated.
The figure below represents a simplified schematic of the ±10 V output stage. The filter cut at 10 MHz and the output is optimized to have a fast step response while reducing the noise. The output is stable for a wide variety of load, including capacitive load up to 20 nF.
AOut Simplified Circuit
The card is factory-calibrated to ensure accurate output values with a maximum of ±10 mV absolute error.
To ensure the ±10 mV precision, a warm-up time of 5 minutes is necessary.
OPAL-RT TECHNOLOGIES, Inc. | 1751, rue Richardson, bureau 1060 | Montréal, Québec Canada H3K 1G6 | opal-rt.com | +1 514-935-2323