SGS Thomson Microelectronics STV8223B Datasheet
MULTISTANDARDVIDEO AND SOUND IF SYSTEM
.
VIDEOPLLDEMODULATION
.
SOUNDPLLDEMODULATION
.
NEGATIVEMODULATION
.
AGC FORNEGATIVEMODULATION
.
AUDIO SWITCH
.
DC VOLUMECONTROL
.
VIDEOSWITCH
STV8223B
WITHAUDIO AND VIDEO SWITCHES
SHRINK24
(PlasticPackage)
DESCRIPTION
TheSTV8223Bisapictureand soundIFprocessor
formultistandardapplicationwithvery fewexternal
componentsand adjustments.
It provides the audio and video switches for one
SCART plug application.
PIN CONNECTIONS
PIF PLLFILTER
AFC OUTPUT
CVBS OUTPUT
SWITCHINGINPUT (INT/EXT)
IF LC
IF LC
AUDIO HIGH PASS FILTER
2nd IF SOUND INPUT
AUDIO AND 2nd IF DECOUPLING
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
ORDER CODE :
TUNERAGC STARTINGPOINT ADJUSTMENT
TUNERAGC OUTPUT
AGCCAPACITOR
NOT TO BE CONNECTED
IF INPUT
IF INPUT
GROUND
V
CC
EXTERNALAUDIO INPUT
STV8223B
INTERNALVIDEO INPUT
VIDEOSWITCH OUTPUT
EXTERNALVIDEO INPUT
January 1997
10
11
12
15
14
13
FM DEMODULATED AUDIO OUTPUT
AUDIOSWITCH OUTPUT
VOLUMECONTROL + MUTE
8223B -01.EPS
1/10
STV8223B
BLOCKDIAGRAM
AFC
OUTPUT
PIF PLL
& AFC
EXT
CVBS
6dB
V
CC
1817125162
SWITCHED
11
CVBS
10
SIF
PLL
WHITE NOISE
&
SPOT INVERT
LOGIC
INTERFACE
LIMITER
AUDIO
Vref
STV8223B
3
SFE
5.5
4
8
9
SFE
6.5
IF INPUT
TUNER
AGC
OUTPUT
19
20
AGC
22
23
TUNER
AGC
24
SWITCHED
DC
VOLUME
MUTE
14 13 15 7
AUDIO
VID
AMP
16
EXT
AUDIO
AUDIO
OUT
Int/Ext
ABSOLUTE MAXIMUMRATINGS
Symbol Parameter Value Unit
V
S
Vx Tuner AGC Voltage V
T
stg
T
oper
Supply Voltage 13.5 V
CC
Storage Temperature -40, +150
Operating Temperature 0, +70
CVBS
OUT
V
o
C
o
C
8223B -02.EPS
8223B-01.TBL
THERMAL DATA
Symbol Parameter Value Unit
Junction-ambient Thermal Resistance Max. 75
2/10
R
th (j-a)
o
C/W
8223B-02.TBL
STV8223B
ELECTRICALCHARACTERISTICS
=25°C, VCC=9V,IF input= 10mV
(T
amb
VideomodulationDSB,D = 90%at B/G,f
VideoBW= 5MHz, Soundcarrier input: 5.5MHz,10mV
Volumeattenuation=0dB,unlessotherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
SUPPLY
V
I
IF AMPLIFIER
V
19-20
R
19-20
C
19-20
Gr Gain Control Range 68 dB
SYNCHRONOUS VIDEO DEMODULATOR
DF
AFC
S2 AFC Slope See Figure 21 0.2 µA/kHz
DEMODULATED VIDEO OUTPUT (Pin 3)
V
BG vs L Amplitude Difference 10 %
V
BW Bandwidth -3dB Video Signal 7 9 MHz
Dg Differential Gain 6 8 %
Dp Differential Phase 3 6 Degree
Vr3c Residual Carrier Signal (RMS Value) 1 10 mV
Vr3h Residual 2nd Harmonic (RMS Value) 1 10 mV
S/N Signal to Noise Ratio Note 1 - Weighted CCIR-567 56 61 dB
V
WTH
V
V
V
AGC CIRCUIT
I
22CBG
I
22DBG
C/D Charging/Discharging Ratio 45
TUNER AGC
I
S23 Current Slope R
I
23+
Notes :
Supply Voltage 8 9 12.6 V
CC
Supply Current I17,VCC=9V 70 95 mA
CC
Input Sensitivity (RMS) -3dB Video atOutput 70 µV
Differential Input Resistance 2 kΩ
Differential Input Capacitance 2 pF
Max Input Signal +1dB Video atOutput 180 mV
Vision Carrier Capture -1.4 1.6 MHz
PC
Amplitude Top Sync to White 2 2.3 2.6 V
A3
Top Sync Level B/G 1.6 1.9 2.2 V
S3
Zero Carrier Level B/G 4.4 V
I
Internal Bias of EmitterFollower 3 5 mA
3
Intermodulation 1.07MHz Note 2 52 dB
White Noise Threshold Voltage 4.85 V
White Noise Insertion Level 3.6 V
WIL
Black Noise Threshold Voltage 1.3 V
BTH
Black Noise Insertion Level 2.5 V
BIL
Charging Current 550 950 1300 µA
Discharge Current 12 20 28 µA
Maximum Sinked Current 1.5 2 2.5 mA
23
Maximum Tuner Plus Sinked Current Note 3 40 mA
S
=
1.
20 log 10
N
2. Video carrier relative level = 0dB, Chroma subcarrier level= -3.2dB,Sound carrier relativelevel =-20dB. AGC voltage (Pin 22)
is adjustedto get 1V
3. Additional sinked current for large increasing steps of input signal when:
- Voltage Pin 22 > starting point defined Pin 24.
- Outputsignal (Pin 3) saturated(V
V
out black white
VN(mV
atBW = 5MHz
)
RMS
signalon output (Pin 3).
PP
< VBTH inBG mode).
3
synclevelatB/G,
RMS
= 38.9MHz,fSC=33.4MHz,
PC
RMS,fM
=5kΩ 100 170 230 µA/dB
24
=1kHz,AudioBW =20kHz,∆f=±50kHz,
RMS
RMS
PP
8223B-03.TBL
3/10
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