ILA1238NS INTEGRAL | Alldatasheet

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Technical content

ILA1238NS (analog of CXA1238S, SONY) - high-quality one-chip stereoreceiver designed for receipt of AM/FM signals of broadcasting stations. The receiver contains: hi gh-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 DISCRI VCO REGULATOR MULTIPLEX COUNTER PD2 PD1 SW M/ST AMP DECODE MUTING BLEND AUTO FILTER RIPPLE BUBU AMP AMP AMPAMP AMP DC DC DC TUNING IND CONTROL MUTING DETUNE AM IF DET FM IF REGULATOR AM FE FM FE 29 28 27 26 25 24 23 22 21 20 19 18 17 16 151413121110987654321 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,

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 Value Unit Ucc Supply voltage 10 V Topr Operation temperature -10 ... +70 °C Tstg Storage temperature -55 ... +150 °C Tjmax Junction maximum temperature 125 °C Pd Allowable power dissipation 500 mW RECOMMENDED OPERATION CONDITIONS Symbol Parameter Value Unit PINS DESCRIPTION Voltage, V Equivalent electrical circuit Description № Symbol Ucc=3V Ucc=6V FM АМ FM АМ PLL LPF1 PLL LPF2 0.86 0.86 0.86 0.86 0.86 0.86 0.86 0.86 26K26K MPX REG 29 1 Low frequency filter for VCO phase selftuning circuit PILOT DET LPF1 PILOT DET LPF2 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 Pins for connecting capacitance of low frequency filter of pilot tone detector ST IND VCO CHECK 1.6 1.6 4.5 4.5 VCO MPX REG 13K 4 Pin of indicator of "STEREO" mode and frequency control 76 kHz

PINS DESCRIPTION (CONTINUED) Voltage, V Equivalent circuit Description № Symbol Ucc=3V Ucc=6V FM АМ FM АМ Rch OUT Lch OUT 1.25 1.25 1.45 1.45 1.35 1.35 2.0 2.0 5 6 Right channel pin Left channel pin 7 Ucc 3.0 3.0 6.0 6.0 Supply Ripple FILTER 2.5 2.5 4.0 4.0 33K 130K 17K17K Internal voltage source filter AGC/AFC1 AGC/AFC2 1.47 1.15 1.15 1.47 1.47 1.15 1.15 1.47 5.3K 25K 22K 50K 50K Pins of heterodyne AFC filter for FM path and AGC for AM path GND MUTE 0.05 0.1 0.05 0.1 Common output of paths IF FM, IF AM and detectors Connection pin of muting time constant capacitance

PINS DESCRIPTION (CONTINUED) Voltage, V Equivalent circuit Description № Symbol Ucc=3V Ucc=6V FM АМ FM АМ TUNE IND 1.6 1.6 4.5 4.5 28K REG Signal level indicator in FM and AM modes FM IF IN BAND SELECT 1.28 1.28 1.28 1.28 330 1315 FM IF input Bands switching output: for AM - to be connected to commom output, for FM - in free state AM IF IN input pin of AM IF FM/AM FE OUT 0.4 0.35 0.8 0.35 220 Output pin of FM IF and AM IF mixers FE GND FM RF IN FM RF 0.4 1.28 1.28 0.4 1.28 1.28 Common output of AM RF and FM RF Input of FM RF amplifier Output of FM RF amplifier AM RF IN 1.28 1.28 1.28 1.28 GND FE REG Input of AM RF

PINS DESCRIPTION (CONTINUED) Voltage, V Equivalent circuit Description № Symbol Ucc=3V Ucc=6V FM АМ FM АМ REG AFC 1.28 1.28 1.28 1.28 1.28B REG23 Output of reference voltage source Output of AFC vericap FM OSC 1.28 1.28 1.28 1.28 REG FM heterodyne output AM OSC 1.28 1.28 1.28 1.28 REG AM heterodyne output FM DISCRI 2.0 2.70 3.08 3.80 261K Discriminator connection output VCO MPX REG GND 1.65 1.65 1.65 1.65 MPX REG VCO control output for stereo- decoder Reference voltage output for stereo-decoder Common output for stereo- decoder

ELECTRICAL CHARACTERISTICS (Ta=25°C, Ucc=6 V) № Parameter, Symbol Value Test conditions unit Min. Max.

1 Consumption current in AM mode,

ICC1 5.0 12 Ucc=6.0 V

2 Consumption current in FM mode,

ICC2 7.0 15 Ucc=6.0 V 3 FM RF block voltage gain, dB A U1 28 42 Ucc=6.0 V UI=40 dBmkV fI=100 MHz 4 FM IF sensitivity, dBmkV S 1 - 31 Ucc=6.0 V UI=*1 fI=10.7 MHz Df=22.5 kHz fm=1 kHz

5 FM IF input signal level when

switching over "MONO" - "STEREO", dBmkV V I1 38 48 U I=*2 fI=10.7 MHz fm=1 kHz

6 FM IF input signal level when

switching over "STEREO" - "MONO", dBmkV V I3 35 46 U I=*3 fI=10.7 MHz fm=1 kHz 7 Automixing, dBmkV V I2 1 41 f I=10.7 MHz fm=1 kHz

8 FM IF frequency deviation of

standard (*4), kHz DF1 -50 50 U I=90 dBmkV fI=(10.7+0.05) MHz fm=1 kHz

9 Output current on tuning indicator

output in FM mode, mA IO2 1.8 7.0 U I=60 dBmkV fI=10.7 MHz

10 Output current on "STEREO" mode

indicator output, mA I O1 1.8 5.0 Ucc=6.0 V UI=245 mV fI=10.7 MHz fm=1 kHz

11 Output signal attenuation factor in

MUTE mode, dB A1 16 30 U I=245 mV MONO fm=1 kHz 12 Channel separation ratio, dB Cd NC 30 - Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz Modulation on R and L channels

13 Output voltage in FM "MONO"

mode, mV UO1 35 138 Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz

14 Output voltage in FM "STEREO"

mode, mV U O2 20 138 Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=22.5 kHz fm=1 kHz

ELECTRICAL CHARACTERISTICS (Ta=25°C, Ucc=6 V) (continued) № Parameter, Symbol Value Test conditions unit Min. Max.

15 Harmonic factor in FM "MONO"

mode, % Kh1 - 2.0 Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=75 kHz fm=1 kHz

16 Harmonic factor in FM "STEREO"

mode, % Kh2 - 2.0 Ucc=6.0 V UI=90 dBmkV fI=10.7 MHz Df=75 kHz fm=1 kHz

17 AM RF voltage gain, dB A U2 19 28 U I=60 dBmkV

fI=1660 kHz 18 Sensitivity (*5) of AM IF, dBmkV S 2 15 29 Ucc=6.0 V Uо=15.5 mV fI=465 kHz fm=1 kHz 30% MOD

19 Output current on tuning indicator

output in AM mode, mA IO3 1.3 7.0 U I=85 dBmkV fI=465 kHz 20 Output voltage in AM mode, mV U O3 35 138 Ucc=6.0 V UI=85 dBmkV fI=465 kHz fm=1 kHz 30% MOD 21 Harmonic factor in AM mode, % Kh 3 - 2.0 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)

TYPICAL APPLICATION CIRCUIT ILA1238NS Ucc=3V GND LPF PLL REG MPX VCO DISCRI FM MUTE OSC AM AFC OSC FM REG RF FM IN RF AM IN RF FM GND OUT FE FM/AM SELECT BAND IN IF AM IN IF FM IND TUNE GNDAFC2 AGC AFC1 AGC FILTER RIPPLE UccOUT Lch OUT Rch CHECK VCO IND ST LPF2LPF1 DET DET PILOT PILOT LPF PLL 3p C7 0.001 C5 10.0 18p 150K IFTCF1 R2 2.2K 10.0 10K 22K RV CF3 3.3 R9* 100 220K R12 220K R11 4.7 C11 2.2K 0.47 C10 100.0 C15 Lch OUT Rch OUT C14* C13* R6* R7* 0.022 0.022 3.3K 3.3K 33.0 1.01.0 C12 2.2K 2.2K 0.01 C19 CF2 330R10 BAND 0.01 C20 4.7 C18 C17C16 151413121110987654321 29 28 27 26 25 24 23 22 21 20 1930 161718 CF1 - filter 465 kHz, CF2 - filter 10.7 MHz, CF3 - piezoelectric discriminator, IFT - matching transformer for 465 kHz (parameters are given above). Fig.10