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TA7640AP LINEAR INTEGRATED CIRCUIT
AM/FM IF PROCESSOR
DESCRIPTION
The Contek TA7640AP Is A Monolithic Integrated Circuit
Designed For The Radios Cassette Tape Recorder.
FEATURES
*Low Operating Current
*Low External Component
*Internal AM/FM Switch
*Wide Operating Voltage : Vcc=3.8V
DIP-16
BLOCK DIAGRAM
INPUT
1 2 3 4 5 6 8
AM FM
0.01
MIXER
Vcc=5V
F
m
100
910111213141516
DETECTOR
DC AMP
4.7kW
DRIVER
7
0.015 mF
AM/FM
SWITC
H
m
F
LOCAL
OSC
mF
0.047
0.047 mF
REGULATOR
10 mF
FM IF AMPAM IF AMP IF AMP
IF AMP
FREQUENCY
AM AMP
68kW
22mF
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
1
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TA7640AP LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Ta=25 C)
PARAMETER SYMBOL VALUE UNIT
Voltage VCC 8 V
Led Driving Current ILAMP 10 mA
Power Dissipation PD 750 mW
Operating Temperature TOPR -25 ~-+75 C
Storage Temperature TSTG -55~-+150 C
NOTE :Ta>25 C,6mw/ C
DC ELECTRICAL CHARACTERISTICS(VCC=5V)
PARAMETER SYMBOL TYP UNIT
AM FM
Pin 1 AM Mixer Input V1 1.5 0 V
Pin 2 AM Mixer Bypass V2 1.5 0 V
Pin 3 AM Local OSC V3 2.3 2.3 V
Pin 4 Voltage Regulator V4 2.3 2.3 V
Pin 5 AM IF Out V5 1 0.9 V
Pin 6 Level Meter Out V6 1 0.9 V
Pin 7 Led Driver Output V7 V
Pin 8 GND V8 0 0 V
Pin 9 Dectector V9 1.4 1.5 V
Pin 10 Vcc V10 5 5 V
Pin 11 FM Decter Out V11 5 5 V
Pin 12 AM IF Bypass V12 1.5 1.5 V
Pin 13 AM IF Input V13 1.5 1.5 V
Pin 14 AM IFBypass V14 1.5 1.5 V
Pin 15 FM IF Input V15 1.5 1.5 V
Pin 16 AM Mixer Output V16 5 5 V
AC ELECTRICAL CHARACTERISTICS(Ta=25 C,VCC=5V,FM;f=10.7MHz, Df=22.5KHz, FM=400Hz AM;
f=1MHz, Mod=30%,FM=400Hz)
PARAMETER SYMBOL CHART TEST CONDITIONS MIN TYP MAX UNIT
Supply Current ICC(1) 1 FM VIN=0 10 15 mA
ICC(2) AM VIN=0 7 10
FM
Input Limiting Voltage VIN(lim) 1 -3dB 40 46 dBm
Detector Output VOD 1 VIN=66dBm 57 85 114 mVrms
Signal Noise Ratio S/N 1 VIN=80dBm 65 dB
Total Harmonic
Distortion
Am Rejection AMR 1 VIN=80dBm 38 dBm
THD 1 VIN=80dBm 0.05 %
Contek Microelectronics Co.,Ltd.
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
2
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TA7640AP LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL CHART TEST CONDITIONS MIN TYP MAX UNIT
Leverl Meter Driving
Voltage
Led Driving Sensitivity VL 1 IL=1mA 46 52 dB
AM
Gain GV 1 VIN=26dBm 20 30 60 mVrms
Detector Output Voltage VOD 1 VIN=60dBm 65 95 125 mVrms
Signal To Noise Ratio S/N 1 VIN=60dBm 47 dB
Total Harmonic
Distortion
Signal Meter Output VM 1 VIN=100dBm 1.6 1.75 1.9 V
Level Meter Driving
Voltage
Oscillation Stop Voltage Vstop 1 RDUMP= 1.5 V
Pin 5 Output Impedance R09 f=1KHZ 3 KW
TEST CIRCUIT
0.022 mF
FM IN
75W
Vin
220
W
VM 1 VIN=100dBm 1.6 1.75 1.9 V
THD 1 VIN=60dBm 1%
VL 1 IL=1mA 32 dBm
0.022
mF
0.01 mF
4.7kW
16 15 14 13 12 11 10 9
10W
0.015
mF
FM\AM
OUT
mA
Vcc=5V
Contek TA7640AP
AM IN
50W
Vin
CONTEK
87654321
0.033 mF
50W
FM CLOSE
FM OPEN
0.047 mF
68kW
LED
390
W
33kW
47 mF
0.047 mF
22 mF
100W
VL(ON)
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
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