OPA343, 2343, 4343

10

SBOS090A

FIGURE 8. Transimpedance Amplifier.

FIGURE 5. OPA343 in Noninverting Configuration Driving ADS7816.

FIGURE 7. Speech Bandpass Filter.

FIGURE 6. OPA343 in Inverting Configuration Driving ADS7816.

ADS7816

12-Bit A/D

DCLOCK

D

OUT

CS/SHDN

OPA343

+5V

For improved accuracy use OPA340.

V

IN

V+

2

+In

3

–In

V

REF

8

4

GND

Serial

Interface

1

0.1µF

0.1µF

7

6

5

NOTE: A/D Input = 0 to V

REF

V

0V to 5V output.

RC network filters high frequency noise.

500

Ω

3300pF

ADS7816

12-Bit A/D

DCLOCK

D

OUT

CS/SHDN

OPA343

+5V

For improved accuracy use OPA340.

V

IN

V+

2

+In

3

–In

V

REF

8

4

GND

Serial

Interface

1

0.1µF

0.1µF

7

6

5

NOTE: A/D Input = 0 to V

REF

5k

Ω

5k

Ω

330pF

V

243k

Ω

10M

Ω

10M

Ω

1.74M

Ω

220pF

47pF

200pF

1/2

OPA2343

+5V

V

IN

R

L

1/2

OPA2343

Filters 160Hz to 2.4kHz

OPA343

V

O

10M

Ω

<1pF (prevents gain peaking)

+V

λ