Datasheet

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ADS7826/27/29
µP
DCLOCK
D
OUT
CS/SHDN
A
0
A
1
U
3
U
4
U
1
U
2
Thermocouple
ISO Thermal Block
MUX
OPA237
0.3 V
0.4 V
0.2 V
0.1 V
+3 V
R
2
59 kΩ
R
4
1 kΩ
R
3
500 kΩ
R
5
500 Ω
R
7
5 Ω
C
3
0.1 µ
F
C
4
10 µ F
C
5
0.1 µ
F
R
6
1 MΩ
R
1
1
TC
2
TC
1
TC
3
+3 V
C
2
0.1 µ F
C
1
10 µ
F
+3 V
R
8
26 kΩ
R
9
1 kΩ
R
10
1 kΩ
R
11
1 kΩ
R
12
1 kΩ
V
REF
ADS7826/27/29
V
CC
CS
D
OUT
DCLOCK
V
REF
+In
–In
GND
+
+
5 
Microcontroller
+2.7V to +3.6V
1 F to
10 F
1 F to
10 F
0.1 F
ADS7826
ADS7827
ADS7829
SLAS388–JUNE 2003
Figure 39. Thermocouple Application Using a MUX to Scale the Input Range of the ADS7826/27/29 family
Figure 40. Basic Data Acquisition System
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