CXA1511L Просмотр технического описания (PDF) - Sony Semiconductor

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CXA1511L

Preamplifier for Remote Control Signal Reception

Sony Semiconductor 

Pin Description

Pin

No.

Symbol

Pin

voltage

1 IN

2.8V

2 C1

2.8V

3 C2

1.9V

4 GND

5 fo

1.4V

CXA1511L/M

Pin voltage depends on the DC Characteristics Measurement Circuit.

Equivalent circuit

Description

47k

VCC

1

40µA↓ 8k

VCC

2

Input pin.

Connect optical reception

diode to GND.

160k

Connect a resistor and

capacitor in series to GND,

and set the frequency

response and gain of "Head

Amp".

When the resistor is large

↓40µA and the capacitor small, the

gain is small.

When the capacitor is large,

8k

sensitivity decreases in

relation to the transient

response.

VCC

30nA↓

330k

3

↓30µA

8k

5

VCC

VCC

4p

8k

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.

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.

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.

–2–

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