ILA1238NS FM/AM STEREO RADIORECEIVER DESCRIPTION ILA1238NS 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 Guaranteed Limits Min ID1/D2 AM/FM circuit current No signal AM/FM GV1 FM front end voltage gain VIN1 = 40dBmV, 100MHz VD1/D3 VD2 FM/AM detection output level Unit Typ Max 8.5/11 12.0/ 15.0 mA 28 35 42 dB 35 77.5 138 VRMS 25 31 dBmV 0.3/0.6 2.0 % 19 24 28 dB 29 dB FM IF knee level THD1/HD2 FM/AM detection output distortion factor GV2 AM front end voltage gain GV3 AM IF voltage gain 15 21 Separation 30 40 VI1 M/ST switching level by IF input 38 43 48 dBmV A1 FM Mute 16 23 30 dB SEP VIN2 = 60dBmV, 1660kHz Vin5=245mVrms, MONO,1kHz ATT Korzhenevsky 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: [email protected] URL: www.bms.by dB ILA1238NS BLOCK-SCHEME 30 29 28 VCO 27 26 25 24 23 21 20 19 18 REGULATOR PD1 MUTING PD2 DECODE AMP 1 2 AUTO BLEND BU AMP DC AMP 3 FM IF DISCRI 5 6 7 8 9 AM IF DET BU AMP DETUNE MUTING CONTROL DC AMP RIPPLE FILTER 4 16 AM FE DC AMP M/ST SW 17 FM FE MULTIPLEX REGULATOR 1/2 COUNTER 22 10 11 TUNING IND 12 13 14 15 APPLICATION CIRCUIT 0.001 C5 C6 10.0 L1 C9 10.0 R12 220K C8 3.3 RV 22K R3 C10 0.47 C1 7p CF3 10K C4 C2 2p 3p R9* 100 L4 L2 C3 18p C7 30 29 28 27 26 25 24 23 22 21 20 GND PLL MPX VCO FM MUTE AM AFC FM REG FM LPF REG DISCRI OSC OSC RF R4 2.2K 4p L3 R2 2.2K 19 AM RF IN 18 FM RF IN 17 16 GNDFM/AM FE OUT ILA1238NS C11 4.7 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 R5 C12 2.2K 1.0 R11 220K Rch OUT Lch OUT C13* 0.022 6 7 8 9 10 C16 C17 33.0 1.0 R6* 3.3K 11 12 13 C18 4.7 R8 2.2K R1 150K AM IF BAND IN SELECT 14 15 C20 0.01 C19 S1 BAND 0.01 CF2 R10 330 CF1 C14* 0.022 R7* 3.3K Ucc=3B C15 100.0 Korzhenevsky 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: [email protected] URL: www.bms.by IFT