CXA3117AN Просмотр технического описания (PDF) - Sony Semiconductor

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производитель

CXA3117AN

IF Amplifier for M-ary FSK Pagers

Sony Semiconductor 

CXA3117AN

Pin Description

Pin

No.

Symbol

Pin

voltage

1 OSC IN

1.4V

2 OSC OUT 0.7V

3 MIX OUT 1.3V

4 VCC

5 IF IN

1.4V

Equivalent circuit

VCC

15k

300

1

72

15k

2

GND

VCC

1.5k

3

GND

1.5k 20k 20k

5

VCC

1.5k

Description

Connects the external parts of crystal

oscillator circuit.

A capacitor and crystal oscillator are

connected to these pins and VCC.

Mixer output.

Connect a 455kHz ceramic filter

between this pin and IF IN.

Power supply.

IF limiter amplifier input.

6 TH CONT —

6

25k

GND

VCC

Determines the level comparator

threshold value.

Threshold value can be adjusted by

inserting the resistor between Pin 6 and

VCC.

Normally, short to VCC.

GND

VCC

7 FSK REF 0.2V

7

72

Connects the capacitor that determines

the low cut-off frequency for the entire

system.

GND

–2–

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