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TDA3857 Fiches technique(PDF) 9 Page - NXP Semiconductors |
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TDA3857 Fiches technique(HTML) 9 Page - NXP Semiconductors |
9 / 14 page June 1994 9 Philips Semiconductors Product specification Quasi-split sound processor with two FM demodulators TDA3857 Notes to the characteristics 1. Spurious intercarrier AM: M = (A − B)/A (A = signal at sync; B = signal with 100% picture modulation). 2. AF signal can be adjusted by V3. 3. For larger current: RL > 2.2 kΩ (pin 6 or 7 to GND) in order to increase the bias current of the output emitter follower. 4. If not used, pin 3 should not be connected. 5. Automatic Frequency Control (AFC) of the vision carrier reference circuit (pins 10 and 11) for reducing spurious video signals in the stereo/dual sound modes. The factor of reducing FTR at deviation ∆fVC specifies the ratio of spurious signals with/without tracking function. AF performance for FM operation (standard B/G) input signals: B/G IF input signal (pin 1, 20) unmodulated sound carriers different video modulation (100%) the output signals are related to the signals described in the demodulator part. (S+N)/N(W) weighted signal-to-noise ratio CCIR468-3; de-emphasis 50 µs black picture fi = 5.5 MHz 59 63 − dB 2T/20T pulses with white bar fi = 5.5 MHz 57 61 − dB 6 kHz sine wave, B/W-modulated fi = 5.5 MHz 52 56 − dB 250 kHz square wave, B/W-modulated fi = 5.5 MHz 50 54 − dB black picture fi = 5.742 MHz 57 61 − dB 2T/20T pulses with white bar fi = 5.742 MHz 55 59 − dB 6 kHz sine wave, B/W-modulated fi = 5.742 MHz 50 54 − dB 250 kHz square wave, B/W-modulated fi = 5.742 MHz 48 52 − dB Ripple rejection of the AF outputs RR ripple rejection Vripple on VP / Vripple on Vout VR(p-p) = 200 mV; fR =70Hz 30 40 − dB SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
Numéro de pièce similaire - TDA3857 |
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Description similaire - TDA3857 |
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