CONTEK KA22241 Datasheet

KA22427 LINEAR INTEGRATED CIRCUIT

I-CHIP AM/FM RADIO IC

DESCRIPTION

Contek KA22427 is a one-chip AM/FM radio integrated circuit
that is suitable for portable radio applications. It includes AM
amplifier, local OSC, AM mixer, AM/FM amplifier, AM AGE,
FM AGE circuit and also class b Audio Power Amplifier.

FEATURES

*Low external components count.

*Wide operating voltage : 3 - 13 V.

*Internal regulated supply for constant current operation.

*DC selection of AM/FM mode.

BLOCK DIAGRAM

AM IF OUT

4 3 2 1 16 15 14

HF GND

AM/FM IN

IF bypass

AGC

bypass

AM/FM

OUT IF Detector IN

+Vcc

DIP-16

AM HF MIXER

AM LO

AM/FM IF

Audio

amplifier

AM/FM

discriminato

Regulator

1113121098765

AM local

OSC

AM HF IN

HF bypass Audio

detector

out

Audio in Ripple

Suppression

Audio GND

Audio power

out

ABSOLUTE MAXIMUM RATING(Ta=25 C)

PARAMETER SYMBOL VALUE UNIT

SUPPLY VOLTAGE VCC 11 V

SUPPLY CURRENT ICC 44 mA

POWER DISSIPATION PD 600 mW

THERMAL RESISTANCE RJ-A 100 C/W

OPERATING TEMPERATURE TOPX -18~65 C

STORAGE TEMPERATURE TSTG -40~125 C

NOTE:Ta>25 C, DERATE WITH 10mW/ C UNLESS SPECIFIED.

CONTEK

Contek Microelectronics Co.,Ltd.

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

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KA22427 LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Quiescent Circuit

Current

Pin 16 Terminal

Voltage

Limiting Voltage VIN(lim) SW1 FM,VCC=5.5V,-3dB

Internal Regulated

Voltage

Pin 16 Voltage V16(AM) SW1 AM,VCC=9V 1.4 1.9 V

Signal to Noise Ratio VO SW1 AM,VCC=12V,VIN=37dB

Maximum Sensitivity S/N SW1 AM,VCC=5.5V,

Power Output POUT SW2 8W,VCC=5.5V,f=1KHZ

Total Harmonic

Distortion

Voltage Gain GV SW2 8W,VCC=5.5V,f=1KHZ

ICCQ SW1 FM,VCC=3V 7 12 17 mA

SW1 FM,VCC=9V 10 17 23

V16(FM) SW1 FM,ICC=42mA 2.0 2.4 3.1 V

57 dBmV

V16=2.4V,VR=Min.

VCC SW1 AM,ICC=42mA 12.5 13.2 14.0 V

1.5 3.0 V

SW2 45W,V16=1.4V

15 20 dB

SW2 8W,VIN=37.5dB

0.28

VR=Min. THD=10%

THD SW2 45W,ICC=42mA,f=1KHZ

VR=Min. VOUT=2V

VR=Min.

0.5 4.0

40

W

%

dB

INPUT - OUTPUT IMPEDANCE(Ta=25 C,VCC=6V)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Pin 2 Input ( AM ) Rip2(AM) f=465KHZ 200 KW

Impedance ( AM ) Cip2(AM) f=465KHZ 3 pF

Pin 2 Input ( FM ) Rip2(FM) f=10.7MHZ 30 KW

Impedance FM

Pin 4 Output Rop4 f=465KHZ 300 KW

Impedance Cop4 f=465KHZ 6 pF

Pin 6 Input Rip6 f=1MHZ 50 KW

Impedance Cip6 f=1MHZ 5 pF

Pin 14 Input ( AM ) Rip14(AM) f=465KHZ 300 KW

Impedance AM

Pin14 Input ( FM ) Rip14(FM) f=10.7MHZ 300 KW

Impedance FM

Pin15 Output ( AM ) Rop15(AM) f=465KHZ 300 KW

Impedance AM

Pin15 Output ( FM ) Rop15(FM) f=10.7MHZ 300 KW

Impedance FM

Cip2(FM) f=10.7MHZ 3.5 pF

Cip14(AM) f=465KHZ 3.5 pF

Cip14(FM) f=10.7MHZ 4 pF

Cop15(AM) f=465KHZ 5.5 pF

Cop15(FM) f=10.7MHZ 6 pF

Contek Microelectronics Co.,Ltd.

CONTEK

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

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