98640A Analog Input Interface
-INPUT
+INPUT
3
~7
2
V
-
4_2
4 -
55.5K
31.5K
.28K
_1
v
_2
u
.Q.
3
(').4
--
AA4
4 1K
~
ADDRESS
:8K
~1
.
K
AA5
4
1)3
--
....,
2
1
X1
X8
X64
X 512
4:28K
-
431.5K
4
': 2 55.5K
2
~7
L - - -
3
V
V OUT +
Figure 3-3. Programmable gain amplifier
3-8
