– 2 –

CXA1511L/M

Pin Description

Pin voltage depends on the DC Characteristics Measurement Circuit.

Pin

No.

Symbol

Pin

voltage

Equivalent circuit

Description

1

2

IN

C1

2.8V

2.8V

Input pin.

Connect optical reception

diode to GND.

Connect a resistor and

capacitor in series to GND,

and set the frequency

response and gain of "Head

Amp".

When the resistor is large

and the capacitor small, the

gain is small.

When the capacitor is large,

sensitivity decreases in

relation to the transient

response.

3

C2

1.9V

Connect a detection capacitor

to GND.

When the capacitor is large,

sensitivity decreases in relation

to the mean value detection

and transient response.

When the capacitor is small,

fluctuation of the peak detection

and output pulse width

increases.

The capacitor in usage is

0.01µF (typ.). Set output pulse

width fluctuation and noise

elimination characteristics to be

optimum.

4

GND

GND pin.

Adopt a pattern design that will

allow external parts to be

located as closely as possible

to this pin. Ground them all at

the same point. The transport

distance and noise elimination

characteristics are greatly

influenced by the pattern design

surrounding the GND.

5

fo

1.4V

Connect a resistor to the

power supply.

Set the center frequency of

the built-in BPF.

See "External resistor at

Pin 5 vs. Center frequency

response" on Page 6.

40µA

↓

47k

160k

8k

↓40µA

8k

1

2

330k

↓30µA

8k

30nA

↓

3

8k

4p

5