Sharp 28JS-74SS, Руководство по обслуживанию

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28JS-74S
ICs ADDITIONAL INFORMATION
TDA9885/V3 (IC201)
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
2
C-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 3
•
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
2
C-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 I
2
C-bus
•
AM demodulator without extra reference circuit
•
Alignment-free selective FM-PLL demodulator with high
linearity and low noise
•
Four I
2
C-bus addresses via MAD
•
I
2
C-bus control for all functions
•
I
2
C-bus transceiver with pin programmable Module
Address (MAD).
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.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TDA9885T SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1
TDA9885TS SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1
TDA9886T SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1
TDA9886TS SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1