4.096V
+5V
0.1µF
+
R
1
6.04kΩ
R
5
31.6kΩ
R
9
150kΩ
REF3040
D1
+5V
0.1µF
+
–
–
R
2
2.94kΩ
R
2
549Ω
OPA335
Zero Adj.
V
O
+ +
K-Type
Thermocouple
40.7µV/°C
R
6
200Ω
R
4
6.04kΩ
R
3
60.4Ω
FIGURE 3. Temperature Measurement Circuit.
I
IN
R
1
+2.5V
I
IN
R
1
+5V
Photodiode
OPA343
Photodiode
OPA343
–2.5V
1MΩ
C
1
+2.5V
R
2
OPA335
C
2
–2.5V
1MΩ
C
1
+5V
R
2
NOTE: (1) Optional pull-down
resistor to allow below
ground output swing.
OPA335
40kΩ
(1)
C
2
–5V
a. Split Supply.
b. Single Supply.
FIGURE 4. Auto-Zeroed Transimpedance Amplifier.
V
EX
= +2.5V
V
EX
R
1
+5V
R R
R R
OPA335
R
1
= 105Ω
Select R
1
so bridge
output
≤
V
CMmax
.
300Ω
Bridge
@ V
S
= 2.7V,
V
CMmax
= 1.2V
R
2
+2.7V
V
OUT
OPA335
V
OUT
R
1
V
REF
a. 5V Supply Bridge Amplifier.
R
2
V
REF
b. 2.7V Supply Bridge Amplifier.
FIGURE 5. Single Op Amp Bridge Amplifier Circuits.
OPA334, OPA2334, OPA335, OPA2335
SBOS245D
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BURR-BROWN [ BURR-BROWN CORPORATION ]
