BA7357S Rohm, BA7357S Datasheet
BA7357S
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BA7357S Summary of contents
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... VIF / SIF signal processor BA7357S The BA7357S is a multi-format ( and I) VIF / SIF signal processor for television and VCR applications. It features a built-in sound-trap and band-pass filters, and employs a pulse-count audio detector that does not require adjustment. This IC reduces external component requirements, and allows space savings. ...
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... Video ICs • Block diagram AFTOUT 1 RFAGC 2 AGCADJ 3 AGCFLT 4 GND1 5 VIFB 6 VIFA 7 GND2 8 SIF 9 AFC 10 VO4. BA7357S EQFLT 22 21 VEQO 20 PLLFLT AFTCOIL 19 18 Vreg PLLCOILA 17 PLLCOILB 16 MODE AFOUT 12 IR ...
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... AUDIO OUT 14 X5 Filter system reference frequency oscillator MODE SW 15 MODE 16 PLL COIL B PLL oscillator COIL 17 PLL COIL A PLL oscillator COIL 18 Vreg Vreg 19 AFT COIL AFT COIL 20 PLL FLT PLL phase detect filter 21 VEQO VIDEO OUT after EQ amplifier 22 EQFLT EQ Filter Function 1%) BA7357S 3 ...
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... Keep the 2 pin 2 voltage at 10.5V or less. GND V CC RFAGC delay point adjustment. Connect to GND via a variable resistor (approx. 100k ). 4. 25.2k GND V For filter time constant for VIFAGC. CC 400 4 GND — GND terminal for VIF, AGC and AFT. BA7357S Function ...
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... GND Sound Filter 8k GND BA7357S Function Video IF input. Use with balanced input. SIF and PLL GND. Audio IF input. Can set to intercarrier mode by pulling down via a 2k resistor. Terminal for holding the audio output DC level fixed. Connect to GND via a 4.7 F capacitor and to Vreg via capacitor to reduce BUZZ ...
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... GND V CC 40k 5k 15 50k 5k 40k GND BA7357S Function Reference current source for adjusting the internal filter. Use connected to GND via a 24k resistor. Use an accurate resistor with good temperature characteristics (e.g. 1% metal film). Audio signal output. The standard output in the case 520mV (when f = 50kHz) ...
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... CC 500 3.3V 20 40k 30k 148k 500 GND2 BA7357S Function For connection of IF detector VCO oscillator coil. IF circuit power supply. Pin 18 has a built-in shunt regulator. For connection of AFT coil. To apply AFT defeat, connect to GND via a 1k (approx.) resistor. Terminal for time constant circuit for the PLL filter ...
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... EQFLT — 8 Equivalent circuit V CC 250 250 21 27k GND V CC 250 250 GND BA7357S Function VIDEO output. Output is via the Sound Trap noise inverter, and EQ amplifier. Connect to GND via a 4.7k resistor. EG Filter. Connect to GND via an LCR series resonant circuit. R should ...
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... IDEF f 0.5 + 0.9 — — – 0.9 – 0 0.6 + 2.0 — — – 2.0 – 0.6 LL 0.5 1.3 — BA7357S Unit Conditions – 3dB point 1dB point 3dB range signal Vreg 80dB , AM87.5%MOD P-P i 100% white video signal ...
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... VO4.5M V — 0 0.5 15M V 6.0 Vreg — 15BG V 2.20 2.40 2.60 15DK V 4.10 4.30 4.50 15I BA7357S Unit Conditions 400Hz 50kHz dB 5% distortion 400Hz 50kHz rms 400Hz 50kHz % fm = 400Hz 50kHz 25kHz, AM30 GND PIO GND PIO V V Intermode P = 80dB , 20dB ...
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... AFTOUT EQFLT RFAGC VEQ0 AGCADJ PLLFLT AGCFLT AFT COIL GND1 VIFB PLL COILA VIFA PLL COILB GND2 MODE SIF AFC AFOUT VO4.5M Fig. 1 BA7357S 39 H 47p 2k 4.7k 0.68 150 1k 0.033 Vreg 27 18p X5 18p 22p 1k IR 24. – 0.01 11 ...
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... SHIFT DET BIAS + 45 SHIFT VIF AMP VIF AMP IF AGC VIF AMP GND1 VIF IN SAW AGCFLT FILTER MODE SW STANDARD SPACING [MHz] MODE [V] OSC [MHz] Fig. 2 BA7357S V (9V (7.5k) 5.1k 100 6. REF AF OSC AMP FM DEMOD SIF SIF LIM SW BPF LIM 500k BPF SIF ...
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... JPS – 121 Type name: S-7GC 4 – 0.10 1 Tuning capacitance: 22pF RH SUMIDA 0236 – JPS – 136 Type name: S-7GC 1 – – 0. Tuning capacitance: 56pF RH S SUMIDA BA7357S f = 38.9MHz 4 – 0.12 6 Tuning capacitance: 22pF RH SUMIDA 1 – – 0.10 6 Tuning capacitance: 56pF RH SUMIDA 13 ...
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... This resistor sets the filter system reference current, so use an accurate component that has good temperature char- acteristics. • Electrical characteristic curves 1 not connected. 1.25 1.0 0 100 125 150 ( C) TEMPERATURE: Ta Fig. 3 Power dissipation 14 1.5 When mounted on 1.4375 a glass eoxy board. 1.0 0 100 125 150 ( C) TEMPERATURE: Ta Fig. 4 Power dissipation BA7357S ...
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... Video ICs • External dimensions (Units: mm) 19.4 0 1.778 0.5 0.1 SDIP22 7.62 BA7357S 15 ...