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KODENSHI KOREA

KKA1238NS Datasheet Preview

KKA1238NS Datasheet

FM/AM STEREO RADIORECEIVER

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TECHNICAL DATA
FM/AM STEREO RADIORECEIVER
KKA1238NS
DESCRIPTION
KKA1238NS is a high performance one - chip bipolar ICS designed for FM/AM stereo radios. These include an FM/AM
front end, FM/AM IF amplifier, FM/AM detection output and FM stereo demodulator output. Bipolar silicon monolithic IC.
FEATURES
Low current consumption
(In FM mode ID = 11.0 mA, in AM mode 8.5 mA,
VCC = 6.0V).
Built - in LED drive circuit for tuning.
Built - in LED drive circuit for stereo indicator.
Built - in detune muting circuit for the FM band.
Few external parts.
ELECTRICAL CHARACTERISTICS(TA = 25°C)
Symbol
Parameter
Test Conditions
ID1/D2 AM/FM circuit current
No signal AM/FM
GV1
VD1/D3
VD2
THD1/HD2
GV2
GV3
SEP
VI1
A1
FM front end voltage gain
FM/AM detection output level
FM IF knee level
FM/AM detection output
distortion factor
AM front end voltage gain
AM IF voltage gain
Separation
M/ST switching level by IF
input
FM Mute
VIN1 = 40dBmV, 100MHz
VIN2 = 60dBmV, 1660kHz
Vin5=245mVrms,
MONO,1kHz ATT
Guaranteed Limits
Min Typ Max
8.5/11 12.0/
15.0
28 35 42
35 77.5 138
25 31
0.3/0.6 2.0
Unit
mA
dB
VRMS
dBmV
%
19 24 28 dB
15 21 29 dB
30 40
dB
38 43 48 dBmV
16 23 30 dB
1




KODENSHI KOREA

KKA1238NS Datasheet Preview

KKA1238NS Datasheet

FM/AM STEREO RADIORECEIVER

No Preview Available !

www.DataSheet4U.com
KKA1238NS
BLOCK-SCHEME
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
VCO
MULTIPLEX
REGULATOR
1/2
COUNTER
PD1
PD2
DECODE
AMP
REGULATOR
FM FE
AM FE
MUTING
BU
AMP
AUTO
BLEND
DC
AMP
BU
AMP
FM IF
DISCRI
AM IF
DET
M/ST DC
SW AMP
RIPPLE
FILTER
DC
AMP
DETUNE TUNING IND
MUTING
CONTROL
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
APPLICATION CIRCUIT
0.001
C5
C6
10.0
R12
220K
C10
0.47
C9
10.0
CF3
R3
RV
22K
10K R9*
100
L1 L2
C1 C2
7p 2p
C8
3.3 3p C7
L4
C4
L3 4p
C3
18p
R2 2.2K
R4
2.2K
C11
4.7
30 29 28 27 26 25 24 23 22 21 20 19 18
GND PLL MPX VCO FM MUTE AM AFC FM REG FM AM FM
LPF REG
DISCRI
OSC
OSC
RF RF RF
IN IN
KKA1238NS
ST
PILOTPILOT IND
FM
PLL DET DET VCO Rch Lch
RIPPLE AGC AGC
TUNE IF
LPF LPF1 LPF2 CHECKOUT OUT Ucc FILTERAFC1 AFC2 GND IND IN
1 2 3 4 5 6 7 8 9 10 11 12 13
17 16
GNDFM/AM
FE
OUT
R1
AM 150K
IF BAND
IN SELECT
14 15
R11
220K
R5
C12 2.2K
1.0
Rch OUT
C13* R6*
0.022 3.3K
Lch OUT
C14* R7*
0.022 3.3K
C18
C16 C17
33.0 1.0 4.7 R8
2.2K
C15
Ucc=3B 100.0
C19
0.01
C20
0.01
S1
BAND
CF2 R10 330
CF1 IFT
2


Part Number KKA1238NS
Description FM/AM STEREO RADIORECEIVER
Maker KODENSHI KOREA
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