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TDA3857 데이터시트(PDF) 8 Page - NXP Semiconductors |
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TDA3857 데이터시트(HTML) 8 Page - NXP Semiconductors |
8 / 14 page June 1994 8 Philips Semiconductors Product specification Quasi-split sound processor with two FM demodulators TDA3857 I6, 7 (M) allowed AC current of emitter output (peak value) note 3 −− ±1.5 mA I6, 7 maximum allowed DC output current −− −2mA THD total harmonic distortion − 0.5 1.0 % Vo (RMS) AF output signal (RMS value) THD = 1.5% 1.25 −− V α AM AM suppression 1 kHz; m = 0.3 48 54 − dB S/N(W) weighted signal-to-noise ratio CCIR468-3 64 68 − dB B AF bandwidth ( −3 dB) lower limit −− 20 Hz upper limit 100 −− kHz α CR crosstalk attenuation (pins 6-7) 60 70 − dB V3 adjustment voltage for AF2 note 4 minimum output signal − 0 − V maximum output signal − 5 − V ∆G AF2min gain for minimum Vout V3 =0V −1.5 −2.5 − dB ∆G AF2max gain for maximum Vout V3 = 5 V 1.0 1.5 − dB V14, 16 DC voltage (pins 14 and 16) − 1.8 − V Tracking Automatic Frequency Control (AFC) of the vision carrier reference circuit Vo 12 tracking output voltage (pin 12) note 5 VP − 3.3 − VP − 1V FTR tracking reducing factor for black picture − 9 − white test picture − 4 − 50% grey picture − 6 − S AFC steepness (open loop) for black picture −−8 − mV/kHz white test picture −−3 − mV/kHz 50% grey picture −−5.5 − mV/kHz AF signal switches input signals: FM intercarrier into pin 13 see part FM demodulator no signal in pin 17 (AF2) the output signals are related to the signals described in the demodulator part. Vo/Vomute AF2 mute attenuation (pin 6) 70 −− dB dV6 DC jump at the AF2 output switching to Mute − 525 mV SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
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