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Diamond Point International

Aitech C431 - A/D, D/A and Digital I/O VME Board

32 16 bit A/D, 32 16 bit D/A, 48 Opto-isolated DIO and 16 Opto-isolated Inputs


The innovative Aitech C431 is a VMEbus slave card that provides extensive I/O resources including analog-to-digital, digital-to-analog, and opto-isolated digital I/O capabilities for harsh environment applications.

Two ADC devices, a 16-bit and a 12-bit ADC, provide high precision analog-to-digital conversion. The 16-bit device input channels are software configurable, either to 32 single-ended input channels or 16 differential channels or a
combination of both. The 12-bit ADC controls two completely isolated differential channels.

One 16-bit DAC device provides 32 high reliability output levels.

All ADC and DAC devices are advanced high-speed devices enabling high sampling rates.

Digital I/O provides high current opto-isolated channels specifically designed for switch activation and high current switching applications. Each of these opto-isolated channels may be individually configured to operate as input or

The card integrates a sophisticated design totally separating the analog and digital domains allowing it to achieve high quality analog to digital and digital to analog conversions.

The VMEbus interface implemented in the C431 is incorporated in an FPGA logic device providing a simple and reliable interface. The VME interface provides slave functionality only and supports A32/D08/D16/D32 access modes.

The C431 is a low power card delivering high I/O capabilities with minimal power consumption. 

The C431 is optionally delivered with a complete set of drivers and optional Built-In Tests (BIT) for all of its on board resources. The drivers integrated into the VME host card environment provide full control and access to all of the C431 modules.

The on-board temperature sensor enables fixing of analog and digital conversion errors.


Analog Inputs

Number Of OutputsStandard A/D Input Channels (ADC1):
• Up to 32 Single Ended or up to 16 Differential Analog Input Channels (combinations of the two are available)
• Input Channels are Software selected by MUX devices

Isolated A/D Input Channels (ADC2)
• 2 Differential analog Input channels
• Isolated supply and digital interfaces
ResolutionStandard A/D Input Channels (ADC1): 16-bit ADC device resolution (12-bit actual input voltage resolution)
Standard A/D Input Channels (ADC2): 2-bit A/D device resolution
RangeADC1: Input voltage range: +/-10 V (other input voltage ranges can be implemented upon request)
ADC2: Input voltage range: +/-10 V (other input voltage ranges can be implemented upon request)
Max Sample RateADC1: 7 kHz per channel
ADC2: Up to 9.6kHz
Overvoltage ProtectionUp to +/- 70 V over voltage/fault protection (both input types)

Analog Outputs

Number Of OutputsUp to 32 Analog output channels
Resolution16-bit D/A device resolution
Range0 to +10 V analog output voltage range (other output voltage ranges can be implemented upon request)
Transition timeMaximum conversion time per channel (from VME to analog output): 35 micro-seconds

Digital I/O/Counter/Timers

I/Os48 optically Isolated I/O channels (can be factory configured as inputs or outputs)
16 optically isolated input channels
InputsMax current draw for each channel is up to 5mA
OutputsMax output voltage range: 0 to +40Vdc or AC peak
Max output current sink: 1 A per output channel


ExpansionThe C431 VME Bridge is implemented in an FPGA logic device. The VME Bridge provides slave VME capabilities and supports A32/D08/D16/D32 data transfers from/to any standard VME host board. The C431 supports VMEbus interrupts generation on any of the seven VME interrupt levels
ElectricalThe C431 may be configured to receive all its power from the VME backplane’s +5.0 V supply only. It also has the capability to utilize the +3.3 V power supply from the backplane as defined in the VME64x specification.

Fully featured and configured to take all its supply from the +5.0 V power supply, its power consumption is 7.85W (typ.) and 13.6W (max.) as follows:
+3.3V (± 5%), 0A (typ), 0A (max)
+5.0V (± 5%), 1.45 A (typ), 2A (max)
+12V (± 10%), 0.05 A (typ), 0.3 A (max)
?12V (± 10%), 0 A (typ), 0A (max)
MechanicalAir-cooled: per ANSI/VITA 1-1994
Conduction cooled: per IEEE 1101.2
Conformal CoatingConformal coating on request
SoftwareVxWorks, Linux, and INTEGRITY Drivers (Optional)
TemperatureSeries-100 Commercial
• Temperature range (operation): 0 to +55C
• Temperature range (storage): -40 to +85C

Series-200 Rugged
• Temperature range (operation): -40 to +71C
• Temperature range (storage): -50 to +100C

Series-400 Military
• Temperature range (operation): -55 to +85C
• Temperature range (storage): -62 to +125C

Ruggedization level is determined in the part numbering scheme - refer to datasheet for further details
HumiditySeries-100 Commercial: 0-90%
Series-200 Rugged, Series-400 Military: 0-95% or 0 to 100% with coating
WeightAir-cooled: < 410 g (0.9 lbs)
Conduction cooled: < 550 g (1.21 lbs)
AltitudeSeries-100 Commercial: 15,000ft
Series-200 Rugged, Series-400 Military: 70,000ft
VibrationSeries-100 Commercial
• Random (g2/Hz): 20-2000Hz/0.02 g2/Hz
• Sine (g PEAK): 10-100Hz/2g

Series-200 Rugged
• Conduction-cooled: Random (g2/Hz): 20-2000Hz/0.1 g2/Hz
• Conduction-cooled: Sine (g PEAK): 50-500Hz/10g
• Air-Cooled: Random (g2/Hz): 20-2000Hz/0.04 g2/Hz
• Air-Cooled: Sine (g PEAK): 10-100Hz/2g

Series-400 Military
• Conduction-cooled: Random (g2/Hz): 20-2000Hz/0.1 g2/Hz
• Conduction-cooled: Sine (g PEAK): 50-500Hz/10g
• Air-Cooled: Random (g2/Hz): 20-2000Hz/0.04 g2/Hz
• Air-Cooled: Sine (g PEAK): 50-500Hz/5.5g
ShockSeries-100 Commercial: 20g/6mS
Series-200 Rugged: Conduction-cooled: 40g/11ms, 100g/6ms
Series-200 Rugged: Air-Cooled: 30g/11ms, 75g/6ms
Series-400 Military: Conduction-cooled: 40g/11ms, 100g/6ms
Series-400 Military: Air-Cooled: 30g/11ms, 75g/6mS
Warranty1 Year

Ordering Details

BoardRefer to datasheet for ordering part number scheme