Datasheet

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