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TDA3857 Fiches technique(PDF) 7 Page - NXP Semiconductors |
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TDA3857 Fiches technique(HTML) 7 Page - NXP Semiconductors |
7 / 14 page June 1994 7 Philips Semiconductors Product specification Quasi-split sound processor with two FM demodulators TDA3857 QL Q-factor of resonance circuit Qo =90 − 40 − V10, 11 DC voltage (pins 10 and 11) − VP − 1 − V Intercarrier mixer output (pin 15) Vo (RMS) output signal for 5.5 MHz (RMS value) 71 95 125 mV output signal for 5.74 MHz (RMS value) 32 43 56 mV B IF bandwidth −1 dB 6 8.5 − MHz −3dB 7 10 − MHz VVID/V15 residual video AM on intercarrier note 1 − 310 % VVC (RMS) residual vision carrier (RMS value) 1st/2nd harmonic (38.9/77.8 MHz) − 0.5 1 mV R15 output resistance (emitter follower) 1 mA emitter current − 30 −Ω Io allowable AC output current (pin 15) −− ±0.7 mA I15 allowable DC output current −− −2mA V15 DC voltage LC-circuit at pin 10, 11 adjusted to minimum video content at pin 15 1.5 1.75 2.0 V Limiting amplifiers (pins 13 and 17) Vi (RMS) minimum input signal (RMS value) −3 dB AF signal − 300 450 µV maximum input signal (RMS value) 200 −− mV R13, 17 input resistance 450 560 700 Ω V13, 17 DC voltage − 0 − V Vi (RMS) level detector threshold for no muting (RMS value, pin 17) only 5.74 MHz channel 0.8 1.2 1.7 mV ∆V i hysteresis of level detector 4 7 12 dB FM1 and FM2 demodulators Measurements with FM IF input signals of 5.5 MHz and 5.74 MHz with Vi IF (RMS) = 10 mV (fmod = 1 kHz, deviation ∆f= ±50 kHz) at pins 13 and 17 without ceramic filters, Rs =50 Ω. De-emphasis 50 µs. QL-factor = 11 for resonant circuits at pins 4-5 and 8-9 (including IC). VIC (RMS) intercarrier signals (RMS values, pins 4-5 and 8-9) − 100 − mV V DC voltage (pins 4, 5, 8 and 9) − 1.8 − V Vo (RMS) AF output signals (RMS values, pins 6 and 7) 0.84 0.95 1.07 V ∆V o difference of AF signals between channels (pins 6 and 7) note 2 −− 1dB R6, 7 output resistance 75 100 130 Ω V6, 7 DC voltage 1.8 2.1 2.4 V SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
Numéro de pièce similaire - TDA3857 |
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Description similaire - TDA3857 |
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