TDA8295_09 Datasheet, PDF (2/83 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

NXP Semiconductors
TDA8295
Digital global standard low IF demodulator for analog TV and FM radio
„ I²C-bus interface and I²C-bus feed-through for tuner programming
„ Four I²C-bus addresses selectable via two external pins
„ Gated IF AGC acting on black level by using H/V PLL or peak IF AGC (I²C-bus
selectable)
„ Internal digital logarithmic IF AGC amplifier with up to 48 dB gain and 68 dB control
range
„ Peak search tuner IF AGC for optimal adaptive drive of the IF ADC
„ Switchable IF PLL and IF AGC loop bandwidths
„ Precise AFC and lock detector
„ Accurate group delay equalization for all standards
„ Very robust IF demodulator coping with adverse field conditions
„ Wide PLL pull-in range up to ±1660 kHz (I²C-bus selectable)
„ CVBS and SSIF or audio output with simple postfilter (capacitor only)
„ CVBS gain levelling stage to provide nearly constant signal amplitude during
overmodulation
„ Video equalizer with eight settings
„ Nyquist filter in video baseband
„ Excellent video S/N (typically 62 dB weighted)
„ High selectivity video low-pass filter for all standards
„ Low video into sound crosstalk
„ Sound performance comparable to QSS single reference concepts
„ AM/FM mono sound demodulator
„ Switchable de-emphasis
„ Excellent FM sound
„ Good AM sound
„ High FM Deviation mode for China
„ Preprocessing of FM radio (mono and stereo) with highly selective digital band-pass
filter
„ No ceramic filter or external components needed for FM radio
„ FM radio available in mono
„ Automatic or forced mute for mono sound
„ Automatic or forced blank for video
„ Mostly digital FIR filter implementation (NSC notches and video low-pass filters)
„ Three GPIO pins
„ Power-On Reset (POR) block for reliable power-up behavior
„ Low total power dissipation (typically 465 mW)
„ Standby mode (typically 7 mW)
„ 40-pin HVQFN package
„ CMOS technology (0.12 μm 1.2 V and 3.3 V)
3. Applications
„ PC TV applications
„ DVD recorders
„ TV applications
TDA8295_C2_2
Product data sheet
Rev. 02 — 27 November 2009
© NXP B.V. 2009. All rights reserved.
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