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98640A Analog Input Interface
01 FFERENTIAL INPUTS
/
/
\
INPUT MULTIPLEXER
PROGRAMMABLE
GAIN
AMPLIFIER (PGA)
~
DIFFERENTIAL
~I
""~ __
---1
TO
~--------t
SINGLE·ENDED
SAMPLE-
AND-
HOLD
.I
I
v3
~
CONVERTER
ADDRESS
LATCH
)"2
PACE TIMING
REGISTER
ADDR.
">
ADDR.
.>
L-____
---r----~
~
w
a:
o
o
«
ID
16 BIT
DATA BUS
STATUS
REGISTER
REGISTER
~----"""A------t
DATA
FLlP·FLOP
v
BACKPLANE
1
ABSOLUTE
VALUE
CIRCUIT
.I
/
v
1
ANALOG-
T()'DIGITAL
/
CONVERTER
12
Figure 3-1. A -to-O card functional block diagram
3-2
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