TDA8822T

Universal I2C-bus programmable RF modulator

GENERAL DESCRIPTION

The TDA8822 is a programmable modulator which generates an RF TV channel from a baseband video signal and a baseband audio signal in the event of negative video and FM sound standards B/G, I, D/K, M and N standards.

FEATURES

• 5 V power supply

• Video amplifier with clamp and white clip circuits

• Programmable video modulation depth

• FM sound modulator 4.5, 5.5, 6.0 and 6.5 MHz

• Programmable picture-to-sound ratio

• Programmable deviation of the sound subcarrier

• Input for modulated NICAM sound subcarrier or second frequency modulated sound subcarrier

• Asymmetrical or symmetrical RF output buffer

• Symmetrical RF oscillator for UHF or VHF band according to the application

• One I2C-bus programmable output port

• On-chip Phase-Locked Loop PLL frequency synthesizer for the RF carrier

• On-chip PLL frequency synthesizer for the sound carrier

• On-chip power supply regulator

• On-chip I2C-bus and/or hardware controlled Test Pattern Signal Generator TPSG with LED driver

• RF output switch-off during tuning.

APPLICATIONS

• Video recorders

• Cable converters

• Satellite receivers

• Set top boxes.