General description

The SAA7131E combines a digital global standard low-IF demodulator for analog TV with a PCI audio and video decoder.

Features

Generic properties

■ Package: LBGA256

■ Power supply: 3.3 V/1.8 V

■ Power consumption of typical application: 1.35 W

■ Meets requirements of PC Design Guides 98/99 and 2001

■ Is compliant with PCI Specification 2.2 and Advanced Configuration

■ PCI-bus Power Management Interface Specification, rev. 1.1, compliant (supported states: D0, D1, D2 and D3-hot)

■ Reference designs available

Digital global standard low-IF demodulator for analog TV

■ Digital IF demodulation for all analog TV standards worldwide (M/N, B/G/H, D/K, I and L/L’ standards)

■ Multistandard true synchronous demodulation with active carrier regeneration

■ Gated IF AGC acting on black level by using H/V PLL

■ Composite Video Blanking Sync (CVBS) gain levelling stage to provide nearly constant signal amplitude

■ Precise AFC/lock detector

■ 16 MHz reference frequency input (from low-IF tuner) or operating as crystal oscillator

■ High selectivity video low-pass filter for all standards

■ Sound performance comparable to or better than QSS single reference concepts

■ Alignment free

■ Nyquist filter in video baseband

■ Switchable IF PLL and IF AGC loop bandwidth

■ Accurate group delay equalization for all standards

■ Mostly digital FIR filter implementation (NSC notches, video low-pass filters)

■ No SAW filter needed

■ Especially suited for the Silicon Tuner TDA18271

■ Low application effort and external component count in combination with the TDA18271

■ Very robust IF demodulator coping with adverse field conditions

■ High pull-in range

■ CVBS and SSIF (Second Sound IF)/audio output with simple post filter (capacitor only)

■ Excellent FM sound

■ Acceptable AM sound

■ High FM deviation mode for China

■ Low video into sound crosstalk

■ Auto or forced mute for sound

■ Auto or forced blank for video

■ One 10-bit IF ADC on-chip

■ Two 10-bit DACs on-chip for CVBS and SSIF/audio

■ Internal PLL synthesizer which permits to use a low-cost crystal (typically 16 MHz)

■ Easy programming for I2C-bus

■ High flexibility through expert mode

■ I2C-bus interface and I2C-bus switch

■ Four I2C-bus addresses selectable through 2 external pins

■ Three general purpose input/output pins

■ Separate Standby mode.

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