KKA1238NS
KKA1238NS is FM/AM STEREO RADIORECEIVER manufactured by Kodenshi AUK Group.
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 m A, in AM mode 8.5 m A, 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 ID1/D2 GV1 VD1/D3 VD2 THD1/HD2 GV2 GV3 SEP VI1 A1 Parameter AM/FM circuit current 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 Vin5=245m Vrms, MONO,1k Hz ATT VIN2 = 60d Bm V, 1660k Hz 19 15 30 38 16 Test Conditions No signal AM/FM VIN1 = 40d Bm V, 100MHz 28 35 Guaranteed Limits Min Typ 8.5/11 35 77.5 25 0.3/0.6 24 21 40 43 23 48 30 Max 12.0/ 15.0 42 138 31 2.0 28 29 m A d B VRMS d Bm V % d B d B d B d Bm V d B Unit
..
BLOCK-SCHEME
MULTIPLEX REGULATOR PD1 PD2
FM FE
REGULATOR
AM FE
1/2 COUNTER
MUTING
DC AMP
FM IF DISCRI
DECODE AMP
BU AMP RIPPLE FILTER
AUTO BLEND
BU AMP
DETUNE MUTING CONTROL
11 12
AM IF DET
TUNING IND
M/ST SW
DC AMP
DC AMP
9...
