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ETC
ETC

TA7642 Datasheet

1 Chip AM Radio Circuit


TA7642 Datasheet Preview


TA7642
LINEAR INTEGRATED CIRCUIT
ONE CHIP AM RADIO CIRCUIT
DESCRIPTION
The TA7642 is suitable for low voltage portable
Radio, cassette system and other wireless AM
system. The package of UTC7642 is TO-92.
FEATURES
*Low operating voltage: Down to VCC=1.3V
*Low Quiescent Current:ICCO=0.2mA
*Low external component required.
1
TO-92
EQUIVALENT CIRCUIT
R3
12K
R5 R6
12K12K
R9
12K
R11
12K
R13 R15
12KC4 12K
2 T1 R4 C2
23pF
C1 12K
12pF
12pF
R2
3.3K
T4
R7
12K
R8
12K
R10
12K
R12
12K
R14
74.6
T10
R1
5.6K
T5 T6
T7 T8 T9
T2 T3
3
1
ABSOLUTE MAXIMUM RATINGS Tested at Ta=25°C,unless otherwise specified
Parameters
Symbols
Min.
Max.
Supply Voltage
VCC
6
Operating Temperature
Topr
-10 60
Storage temperature
TSTG
-55 150
Unit
V
°C
°C
1
Page 1

TA7642
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Tested at Ta=25°C,VCC=1.3V,fm=1kHz,fO=1MHz,MOD=30%,unless other specified)
Parameters Symbols Test conditions Min. Typ.
Supply Voltage
VCC
1.2 1.3
Quiescent Current
Input Resistance
Maximum sensitivity
ICCQ
RI
SM
VI=0
VOD=3mV
0.14
ü
ü
0.20
3
600
Detector Output Voltage
The Range of AGC
VOD
A
VI=10mV
5 15
ü 30
Max.
1.6
0.30
ü
ü
30
ü
Unit
V
mA
M
µV
mV
dB
TEST CIRCUIT
100k
RAGC
1.5k
Vcc
0.01µF
2 TA7642
3
Vout
Vin 75
1
0.1µF
APPLICATION CIRCUIT
100k
RAGC
1k
57
600µH
140pF 7pF
2 TA7642 3
1
0.15µF
0.01µF
0.1µF
1k
1.5V
32
2
Page 2
Part Number TA7642
Manufactur ETC
Description 1 Chip AM Radio Circuit
Total Page 2 Pages
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