Alinx AN8238 Посібник користувача - Сторінка 8
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2-Channel High Speed AD Module AN9238 User Manual
In the module circuit design, the VREF value of AD9238 is 1V, so the final
analog signal input and AD conversion data are as follows
AD Analog
AD8065 Operational
Input Value
Amplifier Output
-5 V
0 V
+5 V
From the table, we can see that the digital value converted by AD9238 is
the smallest when -5V is input, and the digital value converted by AD9238 is the
largest when it is +5V.
Part 2.6: AN9238 Digital Output Timing
The digital output of AD9238 dual-channel AD is +3.3VCMOS output mode,
2 channels (A and B) independent data and clock. AD data converts data on the
rising and falling edges of the clock, and the FPGA end can sample the AD data
with the AD clock.
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AD8138 Differential
Output (VIN+−VIN−)
-1 V
0 V
+1 V
AD9238 Digital
-1 V
000000000000
0 V
100000000000
+1 V
11111111111
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Output