TDA8296 Datasheet, PDF (1/87 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

TDA8296
Digital global standard low IF demodulator for analog TV and
FM radio
Rev. 1 — 3 March 2011
Product data sheet
1. General description
The TDA8296 is an alignment-free digital multistandard vision and sound low IF signal
PLL demodulator for positive and negative video modulation including AM and FM mono
sound processing. It can be used in all countries worldwide for M/N, B/G/H, I, D/K,
L and L-accent standard. CVBS and SSIF/mono audio are provided via two DACs. FM
radio preprocessing is included for simple interfacing with demodulator/stereo decoder
backends.
The IC is especially suited for the application with the NXP Silicon Tuner TDA1827x.
All the processing is done in the digital domain.
The chip has an ‘easy programming’ mode to make the I²C-bus protocol very simple. In
principle, only one bit sets the proper standard with recommended content. However, if
this is not suitable, free programming is always possible.
Note: Register 06h has to be reprogrammed to new value C4h (see Section 9.2 and
Section 9.3.1).
2. Features and benefits
„ Digital IF demodulation for all analog TV standards worldwide (M/N, B/G/H, D/K, I,
L and L-accent standard)
„ Multistandard true synchronous demodulation with active carrier regeneration
„ Alignment-free
„ 16 MHz typical reference frequency input (from low IF tuner) or operating as crystal
oscillator
„ Internal PLL synthesizer which allows the use of a low-cost crystal (typically 16 MHz)
„ Especially suited for the NXP Silicon Tuner TDA1827x
„ No SAW filter needed
„ Low application effort and external component count in combination with the
TDA1827x
„ Simple upgrade of TDA8295 possible
„ 12-bit low power IF ADC on chip running with 54 MHz or 27 MHz
„ Two 10-bit DACs on chip for CVBS and SSIF or audio
„ Easy programming for I²C-bus
„ High flexibility due to various I²C-bus programming registers
„ I²C-bus interface and I²C-bus feed-through for tuner programming
„ Four I²C-bus addresses selectable via two external pins