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STV8223B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
STV8223BMULTISTANDARD VIDEO AND SOUND IF SYSTEM
WITH AUDIO AND VIDEO SWITCHES
January 1997
TUNERAGC STARTING POINT ADJUSTMENT
TUNERAGC OUTPUT
AGC CAPACITOR
NOTTOBE CONNECTED INPUT INPUT
GROUND
VCC
EXTERNAL AUDIO INPUT DEMODULATEDAUDIO OUTPUT
AUDIOSWITCH OUTPUT
VOLUME CONTROL+ MUTE
PIF PLL FILTER
AFC OUTPUT
CVBS OUTPUT
SWITCHINGINPUT (INT/EXT)LCLC
AUDIO HIGH PASS FILTER
2ndIF SOUND INPUT
AUDIO AND 2ndIF DECOUPLING
INTERNAL VIDEO INPUT
VIDEOSWITCH OUTPUT
EXTERNALVIDEO INPUT
PIN CONNECTIONS
SHRINK24
(Plastic Package)
ORDER CODE: STV8223B VIDEO PLL DEMODULATION. SOUND PLL DEMODULATION. NEGATIVE MODULATION. AGC FOR NEGATIVE MODULATION. AUDIO SWITCH. DC VOLUME CONTROL. VIDEO SWITCH
DESCRIPTIONTheSTV8223Bisa pictureand sound IFprocessor
for multistandardapplicationwith very fewexternal
componentsand adjustments. provides the audio and video switches for one
SCART plug application.
1/10
TUNER
AGCOUTPUT
AFCOUTPUT
EXTCVBS
SWITCHED
CVBS
CVBS
OUT
SWITCHED
AUDIO
STV8223BInt/Ext
AUDIO
OUT
EXT
AUDIO INPUT13 15 717125162
PIFPLL& AFC
VIDAMP
6dB
VCC
WHITE NOISE SPOTINVERT
LOGICINTERFACE
TUNER
AGC
AGC
VOLUME 8
SIF
PLL LIMITER
AUDIO
Vref
MUTE
SFE
SFE
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit Supply Voltage 13.5 V Tuner AGC Voltage VCC V
Tstg Storage Temperature -40, +150 oC
Toper Operating Temperature 0, +70 oC
THERMAL DATA
Symbol Parameter Value Unit
Rth(j-a) Junction-ambient Thermal Resistance Max. 75 o C/W
23B
STV8223B
2/10
ELECTRICALCHARACTERISTICS(Tamb =25°C,VCC= 9V,IF input= 10mVRMS synclevelat B/G,
Video modulation DSB,D= 90%at B/G, fPC= 38.9MHz, fSC =33.4MHz,
Video BW= 5MHz, Soundcarrier input: 5.5MHz, 10mVRMS,fM= 1kHz, Audio BW= 20kHz, Δf= ±50kHz,
Volumeattenuation= 0dB,unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. UnitSUPPLY
VCC Supply Voltage 8 9 12.6 V
ICC Supply Current I17,VCC =9V 70 95 mA AMPLIFIER
V19-20 Input Sensitivity (RMS) -3dB Videoat Output 70 μVRMS
R19-20 Differential Input Resistance 2 kΩ
C19-20 Differential Input Capacitance 2 pF Gain Control Range 68 dB
Max Input Signal +1dB Videoat Output 180 mVRMS
SYNCHRONOUS VIDEO DEMODULATOR
DFPC Vision Carrier Capture -1.4 1.6 MHz
AFC AFC Slope See Figure21 0.2 μA/kHz
DEMODULATED VIDEO OUTPUT (Pin3)
VA3 Amplitude Top Syncto White 2 2.3 2.6 VPPvsL Amplitude Difference 10 %
VS3 Top Sync Level B/G 1.6 1.9 2.2 V
Zero Carrier Level B/G 4.4 V Bandwidth -3dB Video Signal 7 9 MHz Differential Gain 6 8 % Differential Phase 3 6 Degree
Vr3c Residual Carrier Signal (RMS Value) 1 10 mV
Vr3h Residual 2nd Harmonic (RMS Value) 1 10 mV Internal Biasof Emitter Follower 3 5 mA
S/N Signalto Noise Ratio Note1- Weighted CCIR-567 56 61 dB
Intermodulation 1.07MHz Note2 52 dB
VWTH White Noise Threshold Voltage 4.85 V
VWIL White Noise Insertion Level 3.6 V
VBTH Black Noise Threshold Voltage 1.3 V
VBIL Black Noise Insertion Level 2.5 V
AGC CIRCUIT
I22CBG Charging Current 550 950 1300 μA
I22DBG Discharge Current 12 20 28 μA
C/D Charging/Discharging Ratio 45
TUNER AGC
I23 Maximum Sinked Current 1.5 2 2.5 mA
S23 Current Slope R24 =5kΩ 100 170 230 μA/dB
I23+ Maximum Tuner Plus Sinked Current Note3 40 mA
Notes:1.S=20log10 Voutblackwhite (mVRMS) atBW= 5MHz Video carrier relative level= 0dB, Chroma subcarrier level= -3.2dB,Sound carrier relativelevel= -20dB. AGC voltage(Pin22) adjustedtoget 1VPP signalon output (Pin3). Additional sinked currentfor large increasing stepsof input signal when: VoltagePin22> startingpoint definedPin24. Outputsignal (Pin3) saturated(V3< VBTHinBG mode).
23B
STV8223B
3/10
ELECTRICAL CHARACTERISTICS (continued)
(Tamb =25°C,VCC= 9V,IF input= 10mVRMS sync levelat B/G,
VideomodulationDSB,D= 90%at B/G, fPC= 38.9MHz,fSC= 33.4MHz,
VideoBW= 5MHz, Sound carrier input: 5.5MHz,10mVRMS,fM= 1kHz,Audio BW= 20kHz,Δf= ±50kHz,
Volume attenuation= 0dB, unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit SOUND DEMODULATION
V8S Input Sensitivity 150 μVRMS Limiter Input Resistance 600 Ω Voltage (Pin8) 4.2 V
AMR Amplitude Modulation Rejection Note4 50 61 dB
SVR Supply Voltage Rejection Ratio Ripple signal: 100Hz, 0.5VPP 28 33 dB
V15 Detected Audio Output Signal 0.85 1.1 1.4 VRMS
THD Total Harmonic Distortion 0.2 1 %
R15 Internal Deemphasis Resistor 600 750 900 Ω
S/N Signalto Noise Ratio See Note5,
WeightedCCIR 468-4,
(quasi peak level) inputPin8 60 dB
Black Picture (sync only) Measurement betweenIF input
(Pins 19-20) and audiooutput (Pin15)
SAW: K2955
BPF: SFE5.5MB 52 dB
White Picture 46 50 dB
250kHz Square Wave 47 52 dB
VOLUME CONTROL Range Control Range See Figure22 72 77 dB
AUDIO SWITCH
R16 Input Resistance 55 70 85 kΩ
CRtk Crosstalk 70 80 dB Output Noise Level (Pin14) WeightedCCIR 468-4, V13= 0.5V
(quasi peak level) μV
EXTHD THDon External Signal (Pin 14) VIN =2VRMS, Attenuation= 0dB 0.1 0.3 %
Audio Reference Voltage (Pin9) 4.5 V
VIDEO SWITCH
VDC12 DC Input Level No signal 1.6 1.9 2.2 V
VS12 Top Sync. Clamp Level 1.8 V
V11 DC Output Level No signal 1.7 2 2.3 V
VS11 Top Sync. Clamp Level 1.5 V
Crosstalk 55 dB
GEX Gain from Ext. Inputto Output 5.5 6 6.5 dB
Output Swing 4 5 V
I12 Input Current V12 =VDC12= 1.5V 1 5 μA
VBW Bandwidth VIN =1VPP 15 MHz
GIN Gain from Int.Inputto Output -0.5 0 +0.5 dB
MUTE (Pin13)
VTH13 Threshold Voltage Pin13 0.2 0.3 0.4 V
CONTROL INPUT
Negative Modulation Video: External- Audio: External 7.2 V
Negative Modulation Video: Internal- Audio: Internal 1.8 V
Notes:4. AMR=20log V15(mVRMS)
VAM (dB) whereVAM= output amplitudeinAMforfM= 1kHzandm= 30%S=20log V15(mVRMS) (mVRMS) (dB)
STV8223B
4/10
8223B
Figure3: CVBS Output
Figure4: SwitchingInput INT/EXT
2kΩ 2kΩ
Figure5: IFLC
Figure6: Audio High Pass Filter
Figure1: PIFPLL Filter
23B
Figure2: AFCOutput
INPUT/OUTPUT PIN CONFIGURATION
STV8223B5/10
INPUT/OUTPUT PIN CONFIGURATION (continued)
600 9
Figure7: 2ndIF Sound Input (Pin8)
Audio and2ndIF Decoupling(Pin9)
Figure8: InternalVideo Input
8223B
1.E
Figure9: VideoSwitch Output
8223B
2.E
Figure10: ExternalVideo Input
23B
Figure11: VolumeControl+ Mute
Figure12: Audio Switch Output
750Ω
8223B
5.E
Figure13: FM Demodulated Audio Output
Figure14: External Audio Input
STV8223B6/10
