VersaLogic Viper VL-EBX-38EBP, Hardware Reference Manual

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CBR-2004B Paddleboard
EBX-38 Hardware Reference Manual
58
Analog I/O (Using VL-CBR-2004A)
A Linear Tech LTC1857 A/D device operates off a single 5V supply to provide eight 12-bit
analog inputs. The LTC1857 provides eight single-ended input channels; or alternatively each
even and odd analog channel “pair” (for example inputs 1 and 2 or 5 and 6) can be combined as
differential inputs or you can also have combinations of both single-ended and differential
channels.
A Linear Tech LTC2634 D/A device is used to provide four single-ended 12-bit outputs. The
converter has 5 μs per -channel update rate with a 0 to 4.096V output voltage range.
The Analog Output interface connects to a CBR-2004 paddle board via the J32 I/O connector.
Note:
The V6 jumper on the paddleboard needs to be on pins 2-3 (connecting GND3 to GND2) for Analog
I/O use.
Table 30
. Analog I/O Using VL-CBR-2004A
Pin Signal Description Pin Signal Description
1 ADC_CH1 Analog Input 2 ADC_CH2 Analog Input
3 AGND Analog Signal Ground 4 AGND Analog Signal Ground
5 ADC_CH3 Analog Input 6 ADC_CH4 Analog Input
7 AGND Analog Signal Ground 8 AGND Analog Signal Ground
9 ADC_CH5 Analog Input 10 ADC_CH6 Analog Input
11 AGND Analog Signal Ground 12 AGND Analog Signal Ground
13 ADC_CH7 Analog Input 14 ADC_CH8 Analog Input
15 AGND Analog Signal Ground 16 AGND Analog Signal Ground
17 DAC_OUT1 Analog Output 18 DAC_OUT2 Analog Output
19 DAC_OUT3 Analog Output 20 DAC_OUT4 Analog Output