Service Manual CP-099F
4-3 TDA9886 IIC-bus controlled single/multi standard Alignment-free IF-PLL
4-3-1- DISCRIPTION
The TDA9885 is an alignment-free single standard(without positive modulation) vision and Sound IF signal PLL.
The TDA9886 is an alignment-free multistandard (PAL,SECAM and NTSC) vision and sound IF signal PLL
demodulator for positive and negative modulation including sound AM and FM processing.
4-3-2- FEATURES
- 5V 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, excellent pulse response).
- Gated phase detector for L/L accent standard.
- Fully integrated VIF Voltage controlled Oscillator(VCO), alignment-free, frequencies switchable forall 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.
- Precise fully digital Automatic Frequency control (AFC) detector with 4-bit digital-to-analog converter ; AFC
bits via I2C-bus readable.
- 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.
- I2C-bus control for all functions.
- I2C-bus transceiver with pin programmable Module Address (MAD).
4-3-3 PINNING
SYMBOL PINDESCRIPTIONSYMBOL PINDESCRIPTION
VIF11VIF differential input 1n.c13not connected
VIF22VIF differential input 2TAGC14tuner AGC output
OP13DVD Reset (open-collector)REF154MHz crystal or reference input
FMPLL4FM-PLL for loop filterVAGC16VIF-AGC for capacitor : note 1
DEEM5de-emphasis output for capacitorCVBS17Video output
AFD6AF decoupling input for capacitorAGND18analog ground
DGND7digital groundVPLL19VIF-PLL for loop filter
AUD8Audio outputVp20supply voltage (+5V)
TOP9Tuner AGC TakeOver point(TOP)AFC21AFC output
2
SDA10IC-bus data input/outputOP222output 2(open-collector)
2
SCL11IC-bus clock inputSIF123SIF differential input 1
SLOMAD 12sound intercarrier output andSIF224SIF differential input 2
MAD select
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ACEC
