+5V
For improved accuracy use OPA340.
0.1µF
0.1µF
8 V+
500Ω
OPA343
V
IN
3300pF
V
IN
= 0V to 5V for
0V to 5V output.
+In
2
–In
3
GND 4
ADS7816
12-Bit A/D
1 V
REF
DCLOCK
D
OUT
CS/SHDN
7
6
5
Serial
Interface
NOTE: A/D Input = 0 to V
REF
RC network filters high frequency noise.
FIGURE 5. OPA343 in Noninverting Configuration Driving ADS7816.
+5V
330pF
For improved accuracy use OPA340.
5kΩ
V
IN
5kΩ
8 V+
+In
OPA343
2
–In
3
GND 4
ADS7816
12-Bit A/D
1 V
REF
DCLOCK
D
OUT
CS/SHDN
7
6
5
Serial
Interface
0.1µF
0.1µF
V
IN
= 0V to –5V for 0V to 5V output.
NOTE: A/D Input = 0 to V
REF
FIGURE 6. OPA343 in Inverting Configuration Driving ADS7816.
+5V
Filters 160Hz to 2.4kHz
10MΩ
V
IN
200pF
10MΩ
1/2
OPA2343
243kΩ
1.74MΩ
47pF
1/2
OPA2343
R
L
220pF
FIGURE 7. Speech Bandpass Filter.
<1pF (prevents gain peaking)
10MΩ
+V
λ
OPA343
V
O
FIGURE 8. Transimpedance Amplifier.
®
OPA343, 2343, 4343
10
BURR-BROWN [ BURR-BROWN CORPORATION ]
