Rainbow Electronics ADC12138 - Manual (Page 29)

Application Hints
(Continued)
With the single-ended multiplexer configuration CH0
through CH7 can be assigned to the MUXOUT1 pin The
COM pin is always assigned to the MUXOUT2 pin A DIN1
is assigned as the positve input A DIN2 is assigned as the
negative input (See
Figure 8 )
Differential
Configuration
TL H 12079 – 36
A DIN1 and A DIN2 can be as-
signed as the
a or b input
FIGURE 8
Single-Ended
Configuration
TL H 12079 – 37
A DIN1 is a input
A DIN2 is b input
The Multiplexer assignment tables for the ADC12130 2 8
(Tables II and III) summarize the aforementioned functions
for the different versions of A Ds
2 1 Biasing for Various Multiplexer Configurations
Figure 9 is an example of biasing the device for single-end-
ed operation The sign bit is always low The digital output
range is 0 0000 0000 0000 to 0 1111 1111 1111 One LSB
is equal to 1 mV (4 1V 4096 LSBs)
TL H 12079 – 38
FIGURE 9 Single-Ended Biasing
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