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| TECHNICAL DATA FM/AM STEREO RADIORECEIVER DESCRIPTION KKA1238NS 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 = 25C) 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=245mVrms, MONO,1kHz ATT VIN2 = 60dBmV, 1660kHz 19 15 30 38 16 Test Conditions No signal AM/FM VIN1 = 40dBmV, 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 mA dB VRMS dBmV % dB dB dB dBmV dB Unit 1 KKA1238NS BLOCK-SCHEME 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 VCO 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 10 1 2 3 4 5 6 7 8 13 14 15 APPLICATION CIRCUIT 0.001 C5 L1 R12 220K C10 0.47 30 R4 2.2K C11 4.7 29 C9 10.0 R3 10K 28 27 RV 22K R9* 100 26 25 24 C1 CF3 C8 3.3 7p 3p 23 C7 L2 C2 2p L3 C3 18p C6 10.0 L4 C4 4p R2 2.2K 22 21 20 19 AM RF IN 18 FM RF IN 17 16 GND PLL MPX VCO FM MUTE AM AFC FM REG FM LPF REG DISCRI OSC OSC RF GND FM/AM FE OUT R1 150K AM IF BAND IN SELECT 14 15 C20 S1 BAND ST PILOTPILOT IND FM PLL DET DET VCO Rch Lch RIPPLE AGC AGC TUNE IF LPF LPF1 LPF2 CHECK OUT OUT Ucc FILTERAFC1 AFC2 GND IND IN 1 R11 220K 2 3 R5 C12 2.2K 1.0 C13* 0.022 R6* 3.3K C14* 0.022 R7* 3.3K C15 100.0 4 5 6 7 8 9 10 C18 4.7 R8 2.2K C19 0.01 CF2 11 12 13 KKA1238NS C16 C17 33.0 1.0 0.01 Rch OUT Lch OUT R10 330 CF1 IFT Ucc=3B 2 KKA1238NS 30-Pin Plastic Dual-in-Line (NS) Dimension, mm A Ai A2 B B2 C D E E1 e e2 L max min min max min max min max min max min max min max min max nom nom min max min max 5.08 0.51 3.05 4.57 0.36 0.58 0.76 1.40 0.20 0.36 26.67 28.49 9.91 11.05 7.62 9.40 1.778 10.16 2.54 3.81 0 10 3 |
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