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UTC KA22427 LINEAR INTEGRATED CIRCUIT
I-CHIP AM/FM RADIO IC
DESCRIPTION
UTC 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.
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-002,A
1
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UTC 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→8Ω,VCC=5.5V,f=1KHZ
Total Harmonic
Distortion
Voltage Gain GV SW2→8Ω,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 dBµV
V16=2.4V,VR=Min.
VCC SW1→AM,ICC=42mA 12.5 13.2 14.0 V
1.5 3.0 V
SW2→45Ω,V16=1.4V
15 20 dB
SW2→8Ω,VIN=37.5dB
0.28
VR=Min. THD=10%
THD SW2→45Ω,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 KΩ
Impedance ( AM ) Cip2(AM) f=465KHZ 3 pF
Pin 2 Input ( FM ) Rip2(FM) f=10.7MHZ 30 KΩ
Impedance£¨FM£©
Pin 4 Output Rop4 f=465KHZ 300 KΩ
Impedance Cop4 f=465KHZ 6 pF
Pin 6 Input Rip6 f=1MHZ 50 KΩ
Impedance Cip6 f=1MHZ 5 pF
Pin 14 Input ( AM ) Rip14(AM) f=465KHZ 300 KΩ
Impedance£¨AM£©
Pin14 Input ( FM ) Rip14(FM) f=10.7MHZ 300 KΩ
Impedance£¨FM£©
Pin15 Output ( AM ) Rop15(AM) f=465KHZ 300 KΩ
Impedance£¨AM£©
Pin15 Output ( FM ) Rop15(FM) f=10.7MHZ 300 KΩ
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
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-002,A
2
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UTC KA22427 LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
1.2k
Ω
SW1
FM
AM
Rg=50
Ω
~
HF
SIGNAL
Rg=600
Ω
AUDIO
~
SIGNAL
F
µ
470
0.047 µF
6
220pF
34
2
1
1
2
3 4
6
4.7k
10pF
V13V16
6
470 µF
34
2
1
Ω
470 µF
F
µ
0.001 µF
220
SW2
8
Ω
Vcc
Icc
OUTPUT
45
Ω
GND
16 15 14 13 12 11 10 9
UTC KA22427
22k
Ω
1 2 3 4 5 6 7 8
0.022 µF
6
1
2
5k
Ω
3 4
2pF
220pF
¦¸
50
0.022 µF
FM IF
INOUT
6
0.022 µF
34
2
1
3 4
2
1
680pF
51pF 0.047 µF
FM
AM
34
0.01 µF
2
6
SW1
1
6
Ω
50
AM HF
INPUT
VOD INPUT
3.3 µF
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-002,A
3
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