SGS Thomson Microelectronics STV2110A Datasheet
STV2110A
PAL-SECAM LUMA-CHROMA& DEFLECTIONPROCESSOR
PRELIMINARY DATA
■
RGB ANDFAST BLANKING INPUTS
■
AUTOMATIC CUT-OFF CONTROL
■
DC-CONTROLLED BRIGHTNESS, CONTRAST ANDSATURATION
■
CERAMIC 500kHz VCO FOR LINE DEFLECTION
■
CHROMA STANDARD AUTOMATIC IDENTIFICATION
■
BIDIRECTIONAL I/O FOR CHROMA STANDARD
■
PHASE-LOCKED REFERENCE OSCILLATOR
USING ASTANDARD 4.43MHz
■
OSD CAPABILITYON OUTPUTS
■
VIDEO IDENTIFICATIONGENERATOR
DESCRIPTION
The STV2110Ais aPAL-SECAM chromadecoder,
videoand H/V deflectionprocessorfor CTV.
UsedwiththeTDA8222,this ICpermits acomplete
lowcost solutionwith external output stages.
It ispin compatiblewith STV2102PALonly processor.
SHRINK 42
(Plastic Package)
ORDER CODE : STV2110A
PINCONNECTIONS
GREEN CUT-OFF CAPACITOR
SUPPLYVOLTAGE
HORIZONTAL Vcc
GREENOUTPUT
BLUE OUTPUT
BLUE CUT-OFF CAPACITOR
LUMINANCE SIGNAL INPUT
SCANNING LOOPFILTER
SCANNING XTAL
COMPOSITEVIDEO SIGNAL
LINE FLYBACK INPUT
VERTICAL OUTPUT
HORIZONTAL OUTPUT
CONTRAST CONTROL
SECAMCHROMA INPUT
GROUND GND
DELAY CHROMA INPUT
CHROMA STANDARD I/O
Vcc
BLKBLANKING INPUT
COG
ROUTRED OUTPUT
HVcc
GOUT
BOUT
COB
YIN
SLPF
SXTL
CVBS
LFB
VOUT
HOUT
CTR
SECIN
PALINPAL CHROMA INPUT
DLI
PS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
ICAT CATHODECURRENT
42
SUPPLY VOLTAGE INPUT
Vcc
41
BLUE INPUT
BIN
40
GIN GREEN INPUT
39
RED CUT-OFF CAPACITOR
COR
38
RIN REDINPUT
37
BRIGHTNESS CONTROL
BRIG
36
FAST BLANKING INPUT
FBL
35
34
33
32
31
30
29
28
27
26
25
24
23
22
CHROMA LOOP FILTER
CLPF
CHROMA XTAL
CXTL
PAL KILLER CAPACITOR
CKP
F425
4.25MHzFILTER
ACC ACC CONTROLCAPACITOR
RED DEEMPHASIS CAPACITOR
CDR
4.40MHz FILTER
F440
SATURATION CONTROL
SAT
CDB
BLUEDEEMPHASISCAPACITOR
F432 4.32MHz FILTER
GROUND
GND
CKS
SECAM KILLER CAPACITOR
CHROMA OUTPUT
DLO
2110A-01.EPS
September 1993
This is advance information on anew product now in developmentor undergoingevaluation. Detailsare subject to change without notice.
1/15
STV2110A
BLOCK DIAGRAM
ROUT
4
GOUT
6
BOUT
7
COR
COG
3388
COB
ICAT
42
BLK
2
VOUT
14
HOUT
15
BRIG
RIN GIN BIN CTR
Line
Output
Counter
SECAM
Output
Shift
Phase
Phase
Comp. 2
Generator
Burst Gate
Permutator
Blank.
Comp.
Decoder
Blanking
Blk. RGB
36
Brightness
40
Contrast
+ Clamp
37 39
35 16
RGB
Cut-off
Meas.
Leak. Current
Meas.
Tube Temp
RGB
Switch
Separator
Frame Sync.
PAL
Flip-Flop
SECAM
Demod.
Frame
Line
Flip-Flop
Ident.
SECAM
VCO
Divider
Phase
Comp. 1
Sep.
Sync.
Mute
Control
Standard
SAT
11
10
12
13
29 28
26
31 21
SXTLSLPFCVBS
F440 LFB
CDR
F432
PS CDBF425
2/15
SAT FBL
HVccVcc Vcc
Matrix
2741
Black
Insertion
5
Y Input
Contrast
1
YIN 9
Saturation
Black
Reference
Clamp
PAL
XVCO
33
CXTL
Demod.
90deg
Phase
Detector
34
CLPF
Killer
Burst
30
ACC
Detector
32
CKP
DL
ACC
18
PALIN
Matrix
17
SECIN
23
CKS
2024
DLI
22 25
19
GND
GND DLO
2110A-02.EPS
STV2110A
FUNCTIONAL DESCRIPTION
DEFLECTION
SynchronizationSeparator
The synchronization separator is based on the
bottom of synchronizationpulses alignment to an
internal reference voltage. An external capacitor
permitstoalignsynchro.pulses,twoexternalresistorsdetermines the detectionthreshold of synchro
pulses. The frame synchronization pulses are
locked to a 32µs referencesignal to perfect interlacing.
HorizontalScanning
Thehorizontalscanningfrequencyisobtainedfrom
a 500kHzVCO. The circuit uses twophase-locked
loops (PLL). The first one controls the frequency;
the second one, fully integrated,controls the relative phase of the synchronization and the line flyback signals.
The firstPLL hastwo times constants: a longtime
constant during the picture to have a good noise
immunity, a shorttime constantat thebeginningof
the frame to recapture faster the phasein case of
VCR video signal. More over, the PLL is in short
time constant three lines before frame pulses occured, it permits to ensure good interlacing when
the videosignal comesfrom a VCR tape with high
phaseerror.
The horizontal output signal is 28µs width. On
starting up, horizontal pulses are enabled at
= 6.8V. On shutting down, horizontal pulses
V
CC
areinhibited for V
CC
= 6.2V.
VerticalScanning
The windows for the frame sync detection are
generatedby a count down system.The selection
of thewindows is determined by the IC status :
- video identificationoff - window : 248/314
- video identificationon - window : 248/352
When a sync pulse is detected inside the window
a 10.5 lines long pulse is providedto V
OUT
pin.
The count down system provides also the needed
signals for the time constant switch, the line PLL
inhibitionand service signals to therest of the IC.
CHROMA
ACC Amplifier,DL Matrix, PermutatorandDemodulator
The correct chroma subcarrier input, issued from
bandpassor bellfilter,is internallyselectedwiththe
standard. The ACC amplifier envolves three
stages : the first one select the correct input, the
second one the -6dB in picture (PAL mode), the
third one is controledby the ACC voltage.
The dynamicrange is overthan 30dB.
The chrominance output signal is fed to the delay
line.
- PALmode :
the adding and substracting direct and delayed
signalsare performed bythe DLmatrix function.
Two synchronous demodulators multiplies
the (B-Y) signal with the 0 degree phase
4.43MHz reference signal and the (R-Y) signal
with the alternate ± 90 deg. 4.43MHz phase
referencesignal.
- SECAMmode :
thepermutatorseparatesthetwo(B-Y)and(R-Y)
subcarriers.These signals are demodulatedby
two FM demodulators with two external L, C
centered on f
O(blue)
= 4.25MHz and f
O(red)
4.406MHz.
4.43MHz Phase Locked Loop
The oscillating frequency of the 4.43MHz crystal
oscillatoris controlled by the output voltage of the
loop filter. The phase detector will lock the 90 degree reference signal to the direct burst signal.
A 90 degree phase shifter permits to recover the
0 degree referencesignal. Aflip-flopdriven by line
pulses permits to generate the alternate ± 90 degree signal.
ACC Controland Color Killer
PALmode :
the directburstsignal isdemodulatedwiththe± 90
degree reference signal. The demodulationresult
is used by ACCcontrol and killer function.
SECAM mode:
ACC control is done by a X
2
demodulator. For
identificationthe burst signals of the red and blue
lines are demodulated by the external LC connected on Pin 31, it is centeredat 4.32MHz. This
give positive and negative signals which are inverted by the signal coming out of the SECAM
flip-flop.
In both standard, if the demodulation result is always positive, the killer capacitor is charged and
the standard is identified (color ON). When demodulationresult is always negative,the killer capacitorvoltage reachestheflip-flopinhibition level,
so the alternace sequence is reversed and the
capacitor ischarged again.
In case of no video signal, both killer capacitors
voltage are maintained about V
/2, below the
CC
color off threshold.
In PAL or SECAM, the ACC control voltage is
obtainedby thepeakdetectionof thedemodulated
burst.
=
3/15
STV2110A
AutomaticStandard Identification
Thecircuitis alternatelyforcedineachmodeduring
two fields (PAL mode, SECAM mode disabled or
SECAMmode, PALmode disabled).
If PALsignalisidentified,thealternatePAL/SECAM
sequencyis lockedin PALmode.
To have a SECAM identification, the circuit must
memorizesa first SECAM identification, than test
the PALmode andconfirma second SECAM identification. The SECAMidentification will take from
four to six fields.
OutputPin21,namedPS,ishighlevelinPALmode
and lowlevel in SECAMmode.
Forced standard : Pin 21 can be used for the
purpose:
- Pin 21 to HVCC : PALmode
- Pin 21 to ground : SECAMmode
VIDEO
InputStage
The luminance input is controlled by the contrast
controlstage which range is 20dB.
The luminance and color difference signals are
added inthe videomatrixcircuit to obtainthe color
signals.
The colorsignals are sentto an RGBswitch which
will driveto the outputseither internalRGBsignals
or external RGB signals.
Automatic Cut-off Control
The black levelsof the RGB outputsare controlled
with thecut-off loops duringthree lineperiodsafter
the frame retrace. The cut-off measurements are
sequentiallyachievedduringthese threelines.The
leakage current measurement is achieved during
the frame retrace and memorized on an internal
capacitor, thus the circuit is able to extract the
cut-offcurrent fromthe totalcurrentmeasurement.
Warm-up Detector
At the start-up, the cut-off loops are switch off, a
white levelis insertedon theluminancesignal until
a cathode current is detected. Then the cut-off
loops are released.
RGB Inputs
To avoid the black level of the inserted signal
differing from the black level of the normal video
signal, the externalRGB are clampedto theblack
level of the luminance signal. Therefore, an AC
couplingis required for the RGB inputs.
The RGB inputs are controlled by a 12dB range
contrast controlstage.
ABSOLUTEMAXIMUMRATINGS
Symbol Parameter Value Unit
HV
V
H
T
T
Horizontal Supply Voltage (Pin 5) 12 V
cc
Video & Chroma Supply Voltage (Pins 1-41) HVCC+ 0.5 V
cc
Horizontal Output (Pin 15) 12 V
OUT
Storage Temperature -55, +150
stg
Operating Temperature 0, +70
oper
THERMALDATA
Symbol Parameter Value Unit
R
th (j-a)
Junction-ambient Thermal Resistance Max. 60
DC AND ACELECTRICALCHARACTERISTICS
(HV
CC=VCC
Symbol Parameter Test Conditions Min. Typ. Max. Unit
HV
cc
V
cc
I
cch
I
ccv&c
P
D
=9V,T
Scanning Supply Voltage (Pin 5) 8.1 9 9.9 V
Video & Chroma Supply Voltage (Pins 1-41) 8.1 9 9.9 V
Scanning Supply Current(pin 5) No load 25 35 mA
Video & Chroma Supply Current (Pins 1-41) No load 45 55 mA
Total Power Dissipation No load 630 890 mW
=25oC unlessotherwise specified)
amb
o
C/W
o
C
o
C
2110A-01.TBL
2110A-02.TBL
2110A-03.TBL
4/15
STV2110A
DC AND AC ELECTRICALCHARACTERISTICS (continued)
(HV
CC=VCC
=9V,T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
LUMINANCE INPUT (Pin 9)
V
V
BW9
DC9
I
G
InputVoltage 350 490 mV
DC Level No input signal 2.6 V
InputCurrent •During burst period
g
Luma Gain 7.4
9
BW467 Bandwidth (Y to R, G, B outputs) -3dB 6 MHz
CONTRAST CONTROL (Pin 16)
V
V
16 (Max.)
G
I
Contrast Control Voltage 2 to 4 V
16
Allowed Control Voltage 5 V
ContrastControl Range 20 dB
16
InputCurrent 10 µA
16
BRIGHTNESS CONTROL (Pin 36)
V
V
36 (Max.)
I
Brightness Control Voltage 1.8 to 4.3 V
36
Allowed Control Voltage 5 V
InputCurrent 10 µA
36
SATURATION CONTROL INPUT (Pin27)
V
V
27 (Max.)
G
V
I
27M
Saturation Control Voltage 2 to 4 V
27
Allowed Control Voltage 5 V
Saturation Control Range -50 dB
27
Mute Level 0.5 V
InputCurrent 10 µA
27
RGB OUTPUTS (Pins 4-6-7)
V
BW 4-6-7
I
4-6-7
VM
V
blank4-6-7
V
CO min.
V
CO max.
Output Signal Amplitude
(black to white)
Individual Output Sinking Current 2 mA
Maximum Peak White Level 7.8 V
4-6-7
Blanking Level 0.5 V
Minimum Level of Inserted Cut-offLines 2.5 V
Maximum Level of Inserted Cut-off Lines 4.5 V
Relative Variation in Black Level with Various
CONT. SAT. BRIG between the 3channels
∆V
Black Level Thermal Drift 0.5 mV/oC
temp
Tracking between Luminance and Chrominance
Signals over 10dB Contrast Control
RGB INPUTS (Pins 37-39-40)
V
BW37-39-40
V
clamp
37-39-40
I
37-39-40
I
i37-39-40
BW
37-39-40
G
CTR
G
37-39-40
InputAmplitude (B to W) 0.7 2 V
Clamp Level Contrast max 1.8 V
ControlCurrent ±150 µA
Leakage Current 1 µA
Bandwidth -3dB 8 MHz
RGB Contrast Control Range 14 dB
RGB Gain 3.7
=25oC unless otherwisespecified)
amb
•Out of burst period
•0.35V B to W @ Pin 9
•Contrast @ 4V
•Sat. & Brig. @ 3V
±150
1
2.6 V
20 mV
2dB
PP
µA
µA
2110A-04.TBL
5/15
Loading...