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11.11. TDA9885/86
11.11.1. General description
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.
Both devices can be used for TV, VTR, PC and set-top box applications.
11.11.2. 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, excellent pulse response)
• Gated phase detector for L/L accent standard
• Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all
negative and positive modulated standards via I
• 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 I
2
C -bus readable
• TakeOver Point (TOP) adjustable via I
• 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 I
• AM demodulator without extra reference circuit
• Alignment-free selective FM-PLL demodulator with high linearity and low noise
• I
2
C-bus control for all functions
• I
2
C-bus transceiver with pin programmable Module Address (MAD).
11.11.3. Pinning
SYMBOL
PIN
VIF1
1
VIF2
2
OP1
3
FMPLL
4
DEEM
5
AFD
6
DGND
7
AUD
8
TOP
9
SDA
10
SCL
11
SIOMA
12
n.c.
13
TAGC
14
REF
15
VAGC
16
CVBS
17
AGND
18
VPLL
19
V
20
P
AFC
21
OP2
22
SIF1
23
SIF2
24
2
C-bus or alternatively with potentiometer
DESCRIPTION
VIF differential input 1
VIF differential input 2
output 1 (open-collector)
FM-PLL for loop filter
de-emphasis output for capacitor
AF decoupling input for capacitor
digital ground
audio output
tuner AGC TakeOver Point (TOP)
I
2
C-bus data input/output
I
2
C-bus clock input
sound intercarrier output and MAD select
not connected
tuner AGC output
4 MHz crystal or reference input
VIF-AGC for capacitor;
video output
analog ground
VIF-PLL for loop filter
supply voltage (+5 V)
AFC output
output 2 (open-collector)
SIF differential input 1
SIF differential input 2
2
C-bus
(Not connected for TDA9885)
14
2
C-bus
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