Datasheet TA7343AP Datasheet (Contek)

TA7343AP LINEAR INTEGRATED CIRCUIT

FM STEREO MULTIPLEX
DECORDER

DESCRIPTION

The Contek TA7343AP is a monolithic integrated circuit

consisting of a phase locked loop FM stereo demodulator. It

is designed for Car stereo, cassette recorder and other

equipment.

FEATURES

*Wide operating supply voltage : Vcc=3V ~ 12V
*High pilot lamp ON sensitivity ( VL(on)=9mV)
*Built-in indicator lamp drive circuit.
*High distortion THD=0.08% at Vi+200Mv

BLOCK DIAGRAM

SIP-9

Input

L.P.F-1

Contek

1 AF DC

Phase
Dector

Buffer

Decorder

L-CH OutputR-CH Output

2 4

Stereo

SW1

19kHz<90

Lamp

Trigger

19kHz<0

o

38kHz

L.P.F-2

Vcc

o

LED

Vcc

76kHz

38khz
check

SW2

FC

1/2 1/2

FM switch

GND

SW1 VCC

SW2 38KHz

1/2

Voltage

Regulator

356798

Vcc

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

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TA7343AP LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUN RATING(Ta=25 C)

PARAMETER SYMBOL RATING UNIT

Supply Voltage VCC 12 V

Lamp Voltage VLAMP 16 V

Lamp Current (Continuous) ILAMP 20 mA

Power Dissipation PD 500 mW

Operating Temperature Range TOPR -20 - +70 C

Storage Temperature Range TSTG -40 - +125 C

ELECTRICAL CHARACTERISTICS(Ta=25 C,VCC=8V,f=1KHZ, unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Quiescent Circuit Current I

Maximum Input Voltage Vi(max) L+R=90%,P=10%, THD=1% 550 mV

Channel Separation CS L+R=180Mv, P=20mV 36 45 dB

Total Harmonic

Distortion (mono)

Total Harmonic

Distortion (Stereo)

Voltage Gain Gv Vi=200mV -2.0 0 +2.0 dB

Channel Balance CB Vi=200mV 0 1.5 dB

Lamp ON Level V

Lamp OFF Level V

Lamp Hysteresis HY 3 mV

Carrier Leakage Vleak 19kHz, L+R=180mV 34 dB

CCQ

THD1 Vi=200mV 0.08 0.3 %

THD2 L+R=1800mV, P=20mV 0.08 %

L(ON)

L(OFF)

Vi=0 11 18 mA

pilot only 9 15 mV

pilot only 2 6 mV

38kHz, P=20mV 42 dB

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

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TA7343AP LINEAR INTEGRATED CIRCUIT

TEST CIRCUIT

APPLICATION INFORMATION (refer to test circuits)
External Components

1.) Input coupling capacitor(C1)

The recommended value is 10 mF. If smaller vlaues than 10WF are used, low frequency separation will worsens,

and is larger values are used, POP noise occurs strongly.

2.) Low Pass Filter (C2,C1,R1)

This is the low pass filter fr the PLL, which is determined the capture range and THD at low frequency.

3.) VCO network (C4,R2,R7)

The VCO free running frequency is adjusted by connecting a frequency counter to monitor the 38kHz output of

Pin6.

4.) Decoder output (Pin8,9)

These components provide Right and Left channel output load circuits. The recommended circuits as follows:

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

3

TA7343AP LINEAR INTEGRATED CIRCUIT

TYPICAL PERFORMANCE CHARACTERISTICS

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

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