TDA8295_09 Datasheet, PDF (1/83 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

TDA8295
Digital global standard low IF demodulator for analog TV and
FM radio
Rev. 02 — 27 November 2009
Product data sheet
1. General description
The TDA8295 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 is 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 TDA8275A or
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: The recommended ADC programming deviates from default setting and needs to
be set explicitly by I²C-bus protocol after hardware reset (see Section 13.5.1).
2. Features
„ 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 TDA8275A or TDA1827x
„ No SAW filter needed
„ Low application effort and external component count in combination with the
TDA8275A or TDA1827x
„ Pin compatible with predecessor TDA8290
„ Simple upgrade of TDA8290 possible
„ 12-bit 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