ILA1238NS AM/FM MONO RECEIVER ILA1238NS (analog of CXA1238S, SONY) - high-quality one-chip stereoreceiver designed for receipt of AM/FM signals of broadcasting stations. The receiver contains: high-frequency amplifiers and AM and FM mixers, AM and FM intermediate frequency amplifiers, AM and FM detectors, output decoder of stereosignal for coding system with pilot tone. • Low consumption current (in FM mode Icc=12.5 mA, in АМ mode Icc=9.5 mA at Ucc=6 V) • LED indication of tuning • LED indication of "STEREO" mode • Switching-off noiseless FM tuning • Small number of peripheral components PACKAGE 30-pin mini-DIP TA = -10°...+70° C BLOCK DIAGRAM 30 29 28 VCO 27 26 25 24 2 5 19 18 17 16 AM FE MUTING PD2 AUTO BLEND BU AMP DC AMP RIPPLE FILTER 4 20 PD1 DC AMP 3 21 REGULATOR DECODE AMP M/ST SW 22 FM FE MULTIPLEX REGULATOR 1/2 COUNTER 1 23 6 7 8 9 10 AM IF DET BU AMP DETUNE MUTING CONTROL 11 Note: VCO - voltage controlled oscillator, REGULATOR - reference voltage source, MULTIPLEX REGULATOR - reference voltage source for stereodecoder, FM FE - heterodyne oscillator, high frequency amplifier and FM path mixer, AM FE - heterodyne oscillator, high frequency amplifier and AM path mixer, FM IF DISCRI - intermediate frequency amplifier and FM path demodulator, AM IF DET - intermediate frequency amplifier and AM path detector , TUNING IND - tuning indicator driver, DETUNE MUTING CONTROL - muting control block, DC AMP - DC amplifier, BU AMP - buffer amplifier, M/ST SW - “MONO”-”STEREO” switch, DECODE AMP - decoder and LF signal amplifier, 1 FM IF DISCRI DC AMP 12 TUNING IND 13 14 15 ILA1238NS RIPPLE FILTER - internal stress source with ripple filter, 1/2 COUNTER - VCO frequency devider, PD1,PD2 - phase detectors of VCO frequency tuning AUTO BLEND - signal level block for VCO frequency tuning, MUTING - “MONO” and “STEREO” modes control block. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Ucc Supply voltage Topr Operation temperature Tstg Storage temperature Tjmax Junction maximum temperature Pd Allowable power dissipation Value 10 -10 ... +70 -55 ... +150 125 500 Unit V °C °C °C mW RECOMMENDED OPERATION CONDITIONS Symbol Parameter Ucc Supply voltage Value 2.0 ... 9.0 Unit V PINS DESCRIPTION № Symbol Voltage, V Ucc=3V Ucc=6V FM АМ FM АМ 1 PLL LPF1 0.86 0.86 0.86 0.86 29 PLL LPF2 0.86 0.86 0.86 0.86 Equivalent electrical circuit MPX REG 26K 26K 29 2 3 PILOT DET LPF1 © PILOT DET LPF2 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 ST IND VCO CHECK 1.6 1.6 4.5 Pins for connecting capacitance of low frequency filter of pilot tone detector 3 2 4.5 13K 4 VCO 2 Low frequency filter for VCO phase selftuning circuit 1 MPX REG 4 Description Pin of indicator of "STEREO" mode and frequency control 76 kHz ILA1238NS PINS DESCRIPTION (CONTINUED) Voltage, V № Symbol Ucc=3V Ucc=6V FM АМ FM АМ 5 Rch OUT 1.25 1.45 1.35 Equivalent circuit Description 2.0 Right channel pin 5 6 Lch OUT 1.25 1.45 1.35 2.0 7 Ucc 3.0 3.0 6.0 6.0 6 Supply 17K 8 Ripple FILTER 2.5 2.5 4.0 Left channel pin 17K Internal voltage source filter 4.0 8 130K 33K 9 AGC/AFC1 1.47 1.15 1.47 1.15 10 AGC/AFC2 1.15 1.47 1.15 1.47 11 GND 0 0 0 0 25 MUTE 0.05 0.1 0.05 0.1 22K 5.3K 25K 9 50K 50K 10 25 Pins of heterodyne AFC filter for FM path and AGC for AM path Common output of paths IF FM, IF AM and detectors Connection pin of muting time constant capacitance 11 3 ILA1238NS PINS DESCRIPTION (CONTINUED) Voltage, V № Symbol Ucc=3V Ucc=6V FM АМ FM АМ 12 TUNE IND 1.6 1.6 4.5 4.5 13 FM IF IN 1.28 0 1.28 0 15 BAND SELECT 1.28 0 1.28 0 Equivalent circuit Description REG 28K 12 Signal level indicator in FM and AM modes 330 15 13 3K FM IF input Bands switching output: for AM to be connected to commom output, for FM in free state 1K 14 AM IF IN 0 0 0 14 0 input pin of AM IF 2K 16 FM/AM FE OUT 0.4 0.35 0.8 Output pin of FM IF and AM IF mixers 0.35 16 220 17 FE GND 0 0 0 0 18 FM RF IN 0.4 0 0.4 0 20 FM RF 1.28 1.28 1.28 1.28 3p 20 Common output of AM RF and FM RF Input of FM RF amplifier Output of FM RF amplifier 18 1K 17 FE REG 19 AM RF IN 1.28 1.28 1.28 Input of AM RF 1.28 19 GND 4 ILA1238NS PINS DESCRIPTION (CONTINUED) Voltage, V № Symbol Ucc=3V Ucc=6V FM АМ FM АМ 21 REG 1.28 1.28 1.28 23 AFC 22 FM OSC 1.28 1.28 1.28 1.28 24 AM OSC 1.28 1.28 1.28 1.28 Equivalent circuit 1.28 Description 21 1.28B REG 23 22 REG FM heterodyne output REG AM heterodyne output 24 1K 26 FM DISCRI 27 VCO 2.0 2.70 3.08 26 Discriminator connection output 3.80 27 28 28 30 MPX REG GND 1.65 0 1.65 0 1.65 0 1.65 Output of reference voltage source Output of AFC vericap MPX REG VCO control output for stereodecoder Reference voltage output for stereo-decoder Common output for stereodecoder 0 30 5 ILA1238NS ELECTRICAL CHARACTERISTICS (Ta=25°C, Ucc=6 V) № Parameter, Symbol unit 1 Consumption current in AM mode, ICC1 mA 2 Consumption current in FM mode, ICC2 mA 3 FM RF block voltage gain, dB AU1 Value Test conditions Min. 5.0 Max. 12 Ucc=6.0 V 7.0 15 Ucc=6.0 V 28 42 Ucc=6.0 V UI=40 dBmkV fI=100 MHz Ucc=6.0 V UI=*1 fI=10.7 MHz Df=22.5 kHz fm=1 kHz UI=*2 fI=10.7 MHz fm=1 kHz UI=*3 fI=10.7 MHz fm=1 kHz fI=10.7 MHz fm=1 kHz UI=90 dBmkV fI=(10.7+0.05) MHz fm=1 kHz UI=60 dBmkV fI=10.7 MHz Ucc=6.0 V UI=245 mV fI=10.7 MHz fm=1 kHz 4 FM IF sensitivity, dBmkV S1 - 31 5 FM IF input signal level when switching over "MONO" "STEREO", dBmkV FM IF input signal level when switching over "STEREO" "MONO", dBmkV Automixing, dBmkV VI1 38 48 VI3 35 46 VI2 1 41 6 7 8 FM IF frequency deviation of standard (*4), kHz DF1 -50 50 9 Output current on tuning indicator output in FM mode, mA Output current on "STEREO" mode indicator output, mA IO2 1.8 7.0 IO1 1.8 5.0 A1 16 30 CdNC 30 - 10 11 Output signal attenuation factor in MUTE mode, dB 12 Channel separation ratio, dB 13 Output voltage in FM "MONO" mode, mV UO1 35 138 14 Output voltage in FM "STEREO" mode, mV UO2 20 138 6 UI=245 mV MONO fm=1 kHz Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz Modulation on R and L channels Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz ILA1238NS ELECTRICAL CHARACTERISTICS (Ta=25°C, Ucc=6 V) (continued) № Parameter, Symbol Value unit Min. Max. 15 Harmonic factor in FM "MONO" Kh1 2.0 mode, % 16 Harmonic factor in FM "STEREO" mode, % Kh2 - 2.0 17 AM RF voltage gain, dB AU2 19 28 18 Sensitivity (*5) of AM IF, dBmkV S2 15 29 19 IO3 1.3 7.0 20 Output current on tuning indicator output in AM mode, mA Output voltage in AM mode, mV UO3 35 138 21 Harmonic factor in AM mode, % Kh3 - 2.0 Test conditions Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=75 kHz fm=1 kHz Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=75 kHz fm=1 kHz UI=60 dBmkV fI=1660 kHz Ucc=6.0 V Uо=15.5 mV fI=465 kHz fm=1 kHz 30% MOD UI=85 dBmkV fI=465 kHz Ucc=6.0 V UI=85 dBmkV fI=465 kHz fm=1 kHz 30% MOD Ucc=6.0 V UI=95 dBmkV f=1660 kHz fm= 1kHz 30% MOD Notes: *1 - Input signal level must be within the limits, that the signal on output makes minus 3 dB of output signal at UI=31.6 мВ. *2 - Input signal level is set equal to 0 mkV and then is raised up to the moment when "STEREO" mode indicator switches on. *3 - Input signal level is set equal to 1 mV and then is reduced to the moment when "STEREO" mode indicator switches off. *4 - Frequency deviation at which voltage constant on output 10 (AGC/AFC2) is equal to the voltage on output 21 (REG), of path central frequency (10.7 MHz). *5 - Sensitivity means that signal level on AM IF input at which voltage on channel outputs is set equal to 15.5 mV (active value) 7 ILA1238NS TYPICAL APPLICATION CIRCUIT 0.001 C5 C6 10.0 L1 C9 10.0 R12 220K CF3 C2 7p 2p 30 29 28 27 GND PLL LPF MPX REG VCO 26 25 C4 4p L3 C3 3p R9* 100 10K R4 2.2K C1 C8 3.3 RV 22K R3 C10 0.47 L4 L2 24 FM MUTE AM DISCRI OSC C7 R2 2.2K 18p 23 22 21 20 19 18 17 16 AFC FM OSC REG FM RF AM RF IN FM RF IN GND FM/AM FE OUT ILA1238NS C11 4.7 ST PILOT PILOT IND PLL DET DET VCO Rch LPF LPF1 LPF2 CHECK OUT 1 R11 220K Rch OUT Lch OUT 2 3 C12 1.0 4 5 R1 Lch RIPPLE AGC AGC OUT Ucc FILTER AFC1 AFC2 6 7 8 R5 2.2K 9 C16 C17 33.0 1.0 10 GND TUNE IND FM IF IN AM IF BAND IN SELECT 11 12 13 14 C18 4.7 R8 2.2K C13* 0.022 R6* 3.3K 15 C20 C19 S1 BAND 0.01 0.01 CF2 R10 330 CF1 C14* 0.022 R7* 3.3K Ucc=3V C15 100.0 CF1 - filter 465 kHz, CF2 - filter 10.7 MHz, CF3 - piezoelectric discriminator, IFT - matching transformer for 465 kHz (parameters are given above). Fig.10 8 150K IFT