Input Range
Without Trim
With Trim
(Adjust offset first at 0V, then adjust gain)
200Ω
R1
IN
200Ω
R1
IN
AGND1
100Ω
V
IN
0V-10V
100Ω
AGND1
R2
IN
33.2kΩ
V
IN
R2
IN
33.2kΩ
R3
IN
+5V
2.2µF
+5V
50kΩ
576kΩ
50kΩ
2.2µF
+
+
R3
IN
CAP
2.2µF
+
REF
2.2µF
+
AGND2
CAP
REF
AGND2
200Ω
R1
IN
200Ω
R1
IN
AGND1
100Ω
33.2kΩ
R2
IN
33.2kΩ
V
IN
+5V
100Ω
AGND1
R2
IN
V
IN
R3
IN
R3
IN
0V-5V
CAP
+
2.2µF
REF
+
2.2µF
AGND2
50kΩ
CAP
+5V
+
2.2µF
50kΩ
2.2µF
+
AGND2
576kΩ
REF
200Ω
V
IN
R1
IN
V
IN
200Ω
R1
IN
AGND1
100Ω
R2
IN
100Ω
AGND1
R2
IN
R3
IN
33.2kΩ
+
0V-4V
+5V
33.2kΩ
+5V
2.2µF
576kΩ
+
R3
IN
CAP
CAP
2.2µF
REF
2.2µF
+
AGND2
50kΩ
50kΩ
REF
+
AGND2
2.2µF
FIGURE 4a. Offset/Gain Circuits for Unipolar Input Ranges.
10
ADS7809
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SBAS017C