VersaLogic Owl, Hardware Reference Manual

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Multi-purpose I/O
39 VL-EPU-4012 Hardware Reference Manual
The EPU-4012 uses a Texas Instruments ADS8668 eight-channel 12-bit A/D converter. The
converter has a 500 kilo-samples-per-second (ksps) aggregate sampling rate, with a 1.
115 μs
acquisition time, high-impedance. The converter is per-channel programmable for the following
input ranges:

±0.64 V

0 to 1.28 V

±1.28 V

0 to 2.56 V

±2.56 V

0 to 5.12 V

±5.12 V

0 to 10.24 V

±10.24 V
Communications with the A/D converter are handled by the FPGA, which uses the SPX slave
selection signal for SPI device 5 to enable the A/D read strobe for the SPI interface.
Refer to the Texas Instruments ADS8668 A/D Converter Datasheet for programming
information.
This table provides the pinout of the Analog-to-Digital Input connector.
Table 9: Analog-to-Digital Input Connector Pinout
Pin Signal Pin Signal
1 Analog Input 1 2 Analog Input 2
3 Analog Ground 4 Analog Ground
5 Analog Input 3 6 Analog Input 4
7 Analog Ground 8 Analog Ground
9 Analog Input 5 10 Analog Input 6
11 Analog Ground 12 Analog Ground
13 Analog Input 7 14 Analog Input 8
15 Analog Ground 16 Analog Ground
17 Digital Ground 18 Digital Ground
19 Reserved 20 Reserved
Cabling
The VL-CBR-2004 paddleboard is bundled with an adapter cable for connecting the Owl to the
VL-CBR-2004 paddleboard. This is a 12-inch, Pico-Clasp 20-pin to 20-pin cable.
If your application requires a custom cable, the following information will be useful:
EPU-4012 Board Connector Mating Connector
Molex 501571-2007 Molex 501189-2010