Datasheet

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ADS7822
P
DCLOCK
D
OUT
CS/SHDN
A
0
A
1
U
3
U
4
U
1
U
2
Thermocouple
ISOThermalBlock
Mux
OPA237
0.3V
0.4V
0.2V
0.1V
+3V
R
2
59kW
R
4
1kW
R
3
500kW
R
5
500W
R
7
5W
C
3
0.1mF
C
4
10mF
C
5
0.1mF
R
6
1MW
R
1
150kW
D
1
TC
2
TC
1
TC
3
+3V
C
2
0.1mF
C
1
10mF
+3V
R
8
26kW
R
9
1kW
R
10
1kW
R
11
1kW
R
12
1kW
V
REF
3-Wire
Interface
ADS7822
V
CC
CS
D
OUT
DCLOCK
V
REF
+In
-In
GND
+
+
5W
1mFto
10mF
1mFto
10mF
0.1mF
Microcontroller
+2.7Vto+3.6V
ADS7822
SBAS062C – JANUARY 1996 – REVISED AUGUST 2007
Figure 27. Thermocouple Application Using a Mux to Scale the Input Range of the ADS7822
Figure 28. Basic Data Acquisition System
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