IC FOR OPTO DETECTOR

AM 336

analog microelectronics

February 2005

11/12

EXTERNAL VOLTAGE STABILISATION AND USE OF BOTH

OUTPUTS

+

VCC

Rs

Dz

Tout

RS

QO

Tout

OUT O

Dzd

QC

GND

OUT

Rzd

Ts

-

Dz

Vcc = 8.5V - 40V

AM336

Figure 9: External Voltage Stabilisation

General application hints:

The nearness of the emission stage with a powerful pulsed current source and the sensitive

photoamplifier require a careful breadboarding (and layout) of the circuit.

• Connections to Vcc and GND should be as short as possible.

• Photodiode Dph should be located closely to the amplifier (Pin: INA) or a shielded line

should be provided.

• Resistors Rd and Rh should be located closely to the chip and should be blocked against Vcc

with a appropriate ceramic capacitor.

• By use of the voltage stabilisation, the maximum supply voltage is only depending of the

breakthrough-voltage of the external elements: Tout, Ts, Dz.