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| Silicore FM receiver circuit for battery supply GENERAL DESCRIPTION The D7088 is a bipolar integrated circuit for use in mono portable and pocket radios. It is used when a mi nimu m of peripheral co mponents (of small dimensions and low costs) is important. The circuit contains a frequency-locked-loop (FLL) sys te m with an Interme d iate Frequency (IF) of about 70kHz. Selectivity is achieved by activ e RC-filters. De-tuning related to the IF and too weak inpu t sign als is suppressed by the mute circuit. D7088 FEATURES Equipped with all stages of a mo n o receiver fro m antenna to au dio output Mute circuit Search tuning with a single varicap diode Mechan ical tuning with Integrating AFC AM application supported Power supply polarity protection Power supply voltage down to 1.8V. Package: SOP16 Mechan ical tuning; this is possible with or without integrating AFC circuit Electrical tuning; th is is realized by one directional (band-up) search tuning facility, including RESET to th e lower-band li mit. APPLICATIONS Mechanical tuning; th is is possible with or without integrating AFC circuit. Electrical tuning; this is realized by on e directio nal (band-up) search tuning facility, including RESET to th e lower-band li mit. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 1/8 CHMC Silicore BLOCK DIAGRAM AND APPLICATION CIRCUIT D7088 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 2/8 CHMC Silicore QUICK REFERENCE DATA CHARACT ERISTIC Supply vo ltage Supply current Radio input frequency RF sensitivity input voltage (RMS value) Signal handing Audio output signal (RMS value) Operating ambient te mperature SYMBOL Vp Ip FIRF Vi(r ms) Vo(r ms ) Ta mb VOAF =-3dB; VOAF =0dB at Vi=1 mV;mute off | f=A 75kHz; THD<10% RL=22k CONDIT IO NS D7088 MIN TYP MAX UNIT 1.8 4.2 0.5 100 60 -10 3 5.2 3 200 85 5 6.6 110 6 120 +70 V mA MHz V mV mV C PIN CONNECTION SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 3/8 CHMC Silicore PINNING PIN 1 2 3 4 5 6 7 8 DESCRIPT ION Mute output Audio frequency output signal AF loop filter +3V supply voltage Oscillator resonant circuit IF feedback Low-pass capacitor of 1 dB amplifer IF output to external coupling capacitor (high-pass) SYMBOL PIN MUTE VOAF LOOP Vp OSC IFFB CLP1 VOIF 9 10 11 12 13 14 15 16 D7088 DESCRIPT ION SYMBO L IF input to limiter VILF a mplifier Low-pass capacitor of I CLP2 li miter a mp lifier Radio frequency input VIRF Radio frequency input Li miter offset voltage capacitor Ground (0V) All-pass filter capacitor /input for search tuning Electrical output tuning/AFC VIRF CLIM GND CAP TUNE LIMITING VALUES SYMBOL Vp Tstg Ta mb PARAMET ER Supply voltage Storage temp erature Operating ambient temp erature MIN. -55 -10 MAX. 5 +150 +70 UNIT V C C ELECTRIC CHARACTERISTICS DC CHARACTERISTICS SYMBOL Vp Ip V1 V3 V6,7 V8 V9,10,13 V11,12 V15 I2 I5 unless otherwise specified: Vp=3V;Ta mb =25C. MIN. 1.8 4.2 2.5 2.64 2.38 1.6 2.42 0.91 2.06 45 275 TYP. 3.0 5.2 2.55 2.69 2.44 1.67 2.47 0.94 2.12 60 375 MAX. 5.0 6.6 2.6 2.74 2.5 1.74 2.52 0.98 2.18 80 500 UNIT V mA V V V V V V V A A 4/8 PARAMET ER Supply vo ltage (pin4) Supply current (pin4) DC voltage on pin 1 DC voltage on pin 3 DC voltage on pin 6 and 7 DC voltage on pin 8 DC voltage on pin 9,10 and 13 DC voltage on pin 11 and 12 DC voltage on pin 15 AF output current on pin 2 Oscillator current on pin 5 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn CHMC Silicore AC CHARACTERISTICS Unless otherwise specified: Vp=3V;Ta mb =25C;fIRF=96MHz D7088 modulated with fmod=1kHz and A PARAMET ER RF sensitivity input voltag e (RMS value) Signal plus noise-to-noise ratio To tal harmonic distortion AM suppression Ripple rejection 22.5kHz deviation; Vi=400V (measured as EMF;Rs=75) SYMBOL CONDIT IO ND VOAF =-3dB; VOAF =0dB at Vi=1mV; mute off VOAF =-3dB; VOAF =0dB a t Vi= 1 mV; mu t e o n (S+N)/N=2 6dB MIN. TYP. MAX. UNIT 3 52 | | AMR R.R f=A f=A 22.5k Hz 75kHz 47 7 60 3 6 5 56 1.0 2.4 52 10 85 6 12 10 1.4 3.3 120 dB dB mVr ms dB Vrms Vi N+S/N THD % FM:1kHz; | f=A 75kHz; AM:1kHz,mod=80% 100mV Rms ripple on Vp, f=1kHz Audio output signal Vo RL=22k (RMS value) Search tuning (with BB910 and C16=0.1F) Minimu m output V16 Limiting point voltage on pin 16 Tuning steepness Vo l t a g e at p i n 1 6 | V /| t Oscillator | f o s c / | t steepness AFC steepness | IAFC/ | V3 Vo ltage at pin 3 95 Vp1.85 210 420 5.6 19 V mV/ s MHz/s s 1.25 2.83 4.75 9.5 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 5/8 CHMC Silicore TEST AND APPLICATION INFORMATION 1. AM APPLICATION CIRCUIT D7088 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 6/8 CHMC Silicore D7088 2. TEST CIRCUIT AND APPLICATION FOR MECHANICAL TUNING 3. APPLICATION CIRCUIT WITH AFC FOR MECHANICAL TUNING SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 7/8 CHMC Silicore CHARACTERISTICS CURVES D7088 Input sensitivity SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 8/8 CHMC |
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