GENERAL DESCRIPTION
●The TDA9885 is an alignment-free multistandard (PAL and NTSC) vision and sound IF signal PLL
●demodulator for negative modulation only and FM processing.
●FEATURES
●• 5 V supply voltage
●• Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier, AC-coupled
●• Multistandard true synchronous demodulation with active carrier regeneration: very linear demodulation, good intermodulation figures, reduced harmonics, and excellent pulse response
●• Gated phase detector for L and L-accent standard
●• Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free, frequencies switchable for all negative and positive modulated standards via I2C-bus
●• Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75, and 58.75 MHz
●• 4 MHz reference frequency input: signal from Phase-Locked Loop (PLL) tuning system or operating as crystal oscillator
●• VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for negative modulated signals and as a peak white detector for positive modulated signals
●• External AGC setting via pin OP1
●• Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit digital-to-analog converter, AFC bits readable via I2C-bus
●• TakeOver Point (TOP) adjustable via I2C-bus or alternatively with potentiometer
●• Fully integrated sound carrier trap for 4.5, 5.5, 6.0, and 6.5 MHz, controlled by FM-PLL oscillator
●• Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode, PLL controlled
●• SIF-AGC for gain controlled SIF amplifier, single reference QSS mixer able to operate in high
●performance single reference QSS mode and in intercarrier mode, switchable via I2C-bus
●• AM demodulator without extra reference circuit
●• Alignment-free selective FM-PLL demodulator with high linearity and low noise
●• Four selectable I2C-bus addresses
●• I2C-bus control for all functions
●• I2C-bus transceiver with pin programmable Module Address (MAD).
