STMICROELECTRONICS STV8224B

STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM
WITH AUDIO AND VIDEO SWITCHES
..
..
..
.
VIDEO PLL DEMODULATION
SOUND PLL DEMODULATION
POSITIVE AND NEGATIVE MODULATION
AGC FOR BG AND L STANDARDS
AUDIO SWITCH
DC VOLUME CONTROL
VIDEO SWITCH
SHRINK24
(Plastic Package)
DESCRIPTION
The STV8224B is a pictureand sound IF processor
for multistandard application with very few external
components and adjustments.
It provides the audio and video switches for one
SCART plug application.
AM sound demodulation is performed with the
STV8225 add-on.
ORDER CODE : STV8224B
PIN CONNECTIONS
1
24
TUNER AGC STARTING POINT ADJUSTMENT
AFC OUTPUT
2
23
TUNER AGC OUTPUT
CVBS OUTPUT
3
22
AGC CAPACITOR
SWITCHING INPUT (STANDARD + INT/EXT)
4
21
AGC CAPACITOR (L STANDARD)
IF LC
5
20
IF INPUT
IF LC
6
19
IF INPUT
AUDIO HIGH PASS FILTER
7
18
GROUND
2nd IF SOUND INPUT
8
17
V CC
AUDIO AND 2nd IF DECOUPLING
9
16
EXTERNAL AUDIO INPUT
INTERNAL VIDEO INPUT
10
15
FM DEMODULATED AUDIO OUTPUT
VIDEO SWITCH OUTPUT
11
14
AUDIO SWITCH OUTPUT
EXTERNAL VIDEO INPUT
12
13
VOLUME CONTROL + MUTE
January 1997
8224B-01.EPS
PIF PLL FILTER
1/12
STV8224B
BLOCK DIAGRAM
EXT
CVBS
AFC
OUTPUT
2
V CC
5
6
1
12
17
18
11
6dB
PIF PLL
& AFC
19
10
VID
AMP
IF INPUT
20
21
WHITE NOISE
&
SPOT INVERT
3
LOGIC
INTERFACE
4
LIMITER
8
AUDIO
Vref
9
SFE
5.5
SFE
6.5
CVBS
OUT
Int/Ext
AGC
22
TUNER
AGC
OUTPUT
SWITCHED
CVBS
BG/L
23
TUNER
AGC
DC
VOLUME
SIF
PLL
24
MUTE
SWITCHED
AUDIO
16 15
EXT
AUDIO
7
STV8224B
8224B-02.EPS
14 13
AUDIO
OUT
ABSOLUTE MAXIMUM RATINGS
Value
Unit
VS
Supply Voltage
13.5
V
Vx
Tuner AGC Voltage
VCC
V
Tstg
Storage Temperature
Toper
Operating Temperature
-40, +150
o
0, +70
o
C
C
THERMAL DATA
Symbol
Rth (j-a)
2/12
Parameter
Junction-ambient Thermal Resistance
Value
Max.
75
Unit
o
C/W
8224B-01.TBL
Parameter
8224B-02.TBL
Symbol
STV8224B
ELECTRICAL CHARACTERISTICS
(Tamb = 25°C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L,
Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, ∆f = ±50kHz,
Volume attenuation= 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SUPPLY
VCC
Supply Voltage
ICC
Supply Current
9
12.6
V
I17, VCC = 9V
8
70
95
mA
-3dB Video at Output
70
µVRMS
IF AMPLIFIER
V19-20
Input Sensitivity (RMS)
R 19-20
Differential Input Resistance
2
kΩ
C 19-20
Differential Input Capacitance
2
pF
Gr
Gain Control Range
Max Input Signal
+1dB Video at Output
68
dB
180
mVRMS
SYNCHRONOUS VIDEO DEMODULATOR
Vision Carrier Capture
DFPC
-1.4
1.6
MHz
AFC
S2
AFC Slope
See Figure 21
µA/kHz
0.2
DEMODULATED VIDEO OUTPUT (Pin 3)
VA3
Amplitude
BG vs L
Top Sync to White
2
2.3
Amplitude Difference
%
2.2
V
B/G and L
Zero Carrier Level
B/G
L
BW
Bandwidth
-3dB Video Signal
Dg
Differential Gain
6
8
%
Dp
Differential Phase
3
6
Degree
Residual Carrier Signal (RMS Value)
1
10
mV
1
10
Vr3c
Vr3h
7
Residual 2nd Harmonic (RMS Value)
Internal Bias of Emitter Follower
I3
S/N
Signal to Noise Ratio
Note 1 - Weighted CCIR-567
Intermodulation 1.07MHz
Note 2
VWTH
White Noise Threshold Voltage
1.9
VPP
10
Top Sync Level
VS3
1.6
2.6
4.4
1.8
V
V
9
MHz
mV
3
5
mA
56
61
dB
52
dB
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
I22CBG
Charging Current
550
950
1300
µA
I22DBG
Discharge Current
12
20
28
µA
C/D
Charging/Discharging Ratio
45
Vout black white
Notes : 1.
= 20 log 10
at BW = 5MHz
N
VN (mVRMS)
2. Video carrier relative level = 0dB, Chroma subcarrier level = -3.2dB, Sound carrier relative level = -20dB. AGC voltage (Pin 22)
is adjusted to get 1VPP signal on output (Pin 3).
S
3/12
8224B-03.TBL
AGC CIRCUIT (BG MODE)
STV8224B
ELECTRICAL CHARACTERISTICS (continued)
(Tamb = 25°C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L,
Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, ∆f = ±50kHz,
Volume attenuation = 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
AGC CIRCUIT (L MODE)
I22CL
Charging Current
I22DL
Discharge Current
I22 CL+
Additional Charging Current
L in case of missing, VITS Pulses
and no White in Video Content
Threshold Voltage Level for
Additional Charging Current
Refered to Pin 3
I22 DL+
Note 3
2
Additional Discharging Current
Threshold Voltage Level for
Additional Discharging Current
28
Refered to Pin 3
3.3
4.5
mA
0.3
µA
5
µA
2.75
V
40
56
2.25
µA
V
TUNER AGC
I23
Maximum Sinked Current
S23
Current Slope
R24 = 5kΩ
I23+
Maximum Tuner Plus Sinked
Current
Note 4
1.5
2
2.5
mA
100
170
230
µA/dB
40
mA
V 8S
Input Sensitivity
150
µVRMS
R8
Limiter Input Resistance
600
Ω
4.2
V
AMR
Amplitude Modulation Rejection
DC Voltage (Pin 8)
Note 5
50
61
dB
SVR
Supply Voltage Rejection Ratio
Ripple signal : 100Hz, 0.5VPP
28
33
dB
0.85
1.1
1.4
VRMS
0.2
1
%
600
750
900
Ω
V15
Detected Audio Output Signal
THD
Total Harmonic Distortion
R 15
Internal Deemphasis Resistor
S/N
Signal to Noise Ratio
See Note 6,
Weighted CCIR 468-4,
(quasi peak level) input Pin 8
55
60
dB
Black Picture (sync only)
Measurement between IF input
(Pins 19-20) and audio output (Pin 15)
SAW : K2955
BPF : SFE5.5MB
47
52
dB
46
50
dB
47
52
dB
See Figure 22
72
77
dB
White Picture
250kHz Square Wave
VOLUME CONTROL
VC Range
Control Range
Notes : 3. Triggered on white level
4. Additional sinked current for large increasing steps of input signal when :
- Voltage Pin 22 > starting point defined Pin 24.
- Output signal (Pin 3) saturated (V 3 < V BTH in BG mode, V3 > V WTH in L mode).
V15 (mVRMS)
5. AMR = 20 log
(dB) where VAM = output amplitude in AM for fM = 1kHz and m = 30%
VAM
V15 (mVRMS)
S
6.
= 20 log
(dB)
VN (mVRMS)
N
4/12
8224B-04.TBL
FM SOUND DEMODULATION
STV8224B
ELECTRICAL CHARACTERISTICS (continued)
(Tamb = 25°C, VCC = 9V, IF input = 10mVRMS synclevel at B/G, Peak-white level at L,
Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, ∆f = ±50kHz,
Volume attenuation = 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Input Resistance
55
70
85
kΩ
Crosstalk
70
80
dB
70
µV
AUDIO SWITCH
R 16
CRtk
En
EXTHD
Output Noise Level (Pin 14)
Weighted CCIR 468-4, V13 = 0.5V
(quasi peak level)
THD on External Signal (Pin 14)
VIN = 2VRMS, Attenuation = 0dB
0.1
Audio Reference Voltage (Pin 9)
0.3
4.5
%
V
VIDEO SWITCH
VDC 12
DC Input Level
No signal
1.6
1.9
2.2
Top Sync. Clamp Level
V11
DC Output Level
VS11
Top Sync. Clamp Level
1.5
V
Crosstalk
55
dB
GEX
1.8
V
VS12
No signal
Gain from Ext. Input to Output
5.5
Output Swing
I12
VBW
GIN
1.7
4
Input Current
V12 = VDC12 = 1.5V
Bandwidth
VIN = 1VPP
2
6
V
2.3
6.5
dB
5
µA
5
1
V
V
15
MHz
Gain from Int. Input to Output
-0.5
0
+0.5
dB
Threshold Voltage Pin 13
0.2
0.3
0.4
V
MUTE (Pin 13)
VTH13
CONTROL INPUT
Video : External - Audio : External
7.2
Threshold 3
Level linked to VCC
6.4
Positive Modulation
Video : External - Audio : External
4.9
Threshold 2
Level linked to VCC
4.1
Positive Modulation
Video : Internal - Audio : External
2.6
Threshold 1
Level linked to VCC
1.8
Negative Modulation
Video : Internal - Audio : Internal
V
6.8
7.2
V
6.4
V
4.5
4.9
V
4.1
V
2.2
2.6
V
1.8
V
5/12
8224B-05.TBL
Negative Modulation
STV8224B
INPUT/OUTPUT PIN CONFIGURATION
Figure 1 : PIF PLL Filter
Figure 2 : AFC Output
2
Figure 3 : CVBS Output
8224B-04.EPS
8224B-03.EPS
1
Figure 4 : Switching Input Standard + INT/EXT
3
8224B-05.EPS
8224B-06.EPS
4
Figure 5 : IFLC
Figure 6 : Audio High Pass Filter
2kΩ
5
2kΩ
6
6/12
8224B-08.EPS
8224B-07.EPS
7
STV8224B
INPUT/OUTPUT PIN CONFIGURATION (continued)
Figure 8 : Internal Video Input
9
8224B-10.EPS
10
8224B-09.EPS
600Ω
8
2nd IF Sound Input (Pin 8)
Audio and 2nd IF Decoupling (Pin 9)
600Ω
Figure 7 :
Figure 9 : Video Switch Output
Figure 10 : External Video Input
11
Figure 11 : Volume Control + Mute
8224B-12.EPS
8224B-11.EPS
12
Figure 12 : Audio Switch Output
13
8224B-13.EPS
8224B-14.EPS
14
Figure 13 : FM Demodulated Audio Output
Figure 14 : External Audio Input
16
750Ω
8224B-16.EPS
8224B-15.EPS
15
7/12
STV8224B
INPUT/OUTPUT PIN CONFIGURATION (continued)
Figure 16 : IF Input
1kΩ
17
15V
Figure 17 : AGC Capacitor
8224B-18.EPS
20
8224B-17.EPS
19
1kΩ
Figure 15 : VCC
Figure 18 : AGC Capacitor
21
Figure 19 : Tuner AGC Output
8224B-20.EPS
8224B-19.EPS
22
Figure 20 : Tuner AGC Starting Point Adjustment
23
8/12
8224B-22.EPS
8224B-21.EPS
24
STV8224B
Figure 21 : AFC Voltage Pin 2 vs IF Frequency
Figure 22 : Volume Control Attenuation vs V13
0
6
5
4
3
2
1
0
38.55
38.75
38.95
39.15
IF FREQUENCY (MHz)
39.35
Figure 23 : Tuner AGC Output Current vs VIN
(R24 is external adjustment Pin 24)
-20
-30
-40
-50
-60
-70
-80
1.0
2.0
3.0
4.0
5.0
V13 (V)
Figure 24 : Video Signal to Noise Ratio (Pin 3)
as a function of IF Input Signal
(Pins 19-20) Weighted CCIR-567
80
R24 = 1kΩ
R24 = 3kΩ
R24 = 5kΩ
1.75
60
S/N (dB)
1.5
70
1.25
1
0.75
50
40
30
0.5
20
0.25
10
0
1
10-1
VIN
10
(mV RMS )
102
103
0
0.01
0.1
1
10
100
VIN (mVRMS)
8224B-30.EPS
2
8224B-25.EPS
TUNER AGC OUTPUT CURRENT (mA)
-10
8224B-24.EPS
7
VOLUME CONTROL
ATTENUATION (dB)
Current Conversion
with 100kΩ/100kΩ Bridge
8224B-23.EPS
AFC VOLTAGE (PIN 2) (V)
8
Figure 25 : Black and White Noise Inverter
V3 (V)
White Spike Noise Clamp
4.2
3.6
Top White
White Noise Level Insertion
2.5
1.9
1.3
Black Noise Level Insertion
Top Synchronization
8224B-26.EPS
4.85
Black Spike Noise Clamp
t
9/12
10/12
8224B-27.EPS
AFC
Output
12V
Tuner AGC
Output
R15
6.8kΩ
9V
R16
100kΩ
R17
100kΩ
390Ω
R34
15Ω
R35
C16
2.2µF
C33
10µF
Tuner
AGC
9V Delay
C17
10nF
DZ1
BZX55C
10V
Q4
BC337
R14
27kΩ
IF1
1nF
P1
10kΩ
1
24
VIDEO SAW
FILTER
BGDK
C32
10nF
R13
330Ω
C15
100nF
2
23
C18
1µF
3
22
150Ω
LC1
68pF
C28
18
100nF
C20
47µF
C21
6
BFP
6.5MHz
CF2
BFP
5.5MHz
CF1
D2
C25
10µF
1N4148
D1
1N4148
7
STV8224B
19
38.9MHz
5
20
C29
10nF
R22
Switching
Voltage
4
21
L4
3.3µH
8
17
R25
2.7kΩ
1.8kΩ
10
15
C26
100nF
R24
4.7kΩ
R27
R20
1kΩ
1.8kΩ
R21
C24
1nF
9
16
SW4
STD
R28
4.7kΩ
12
13
8.2µH
CF3
SW1
C27
470nF
Mute
TRAP FILTER
(5.5MHz - 6.5MHz)
L6
R26
3.9kΩ
Q3
BC547
+9V
11
14
C7
68nF
R12
2.2kΩ
R32
10kΩ
10µF
C8
R9
560Ω
BC547
Q2
R29
75Ω
75Ω
R18
R10
22Ω
+9V
470nF
C30
C31
100nF
Volume control
4.7µF
C6
220Ω
R11
10µF
C9
+9V
CVBS
Output
(To SCART)
CVBS
Ouput
External
CVBS
Input
(From SCART)
P2
10kΩ
3.3kΩ
Switched
Sound
Output
Demodulated
Sound
Output
(To SCART)
External
Sound
Input
(From SCART)
STV8224B
APPLICATION DIAGRAM (B/G/D/K)
STV8224B
8224B-28.EPS
AFC
Output
12V
Tuner AGC
Output
R15
6.8kΩ
9V
R16
100kΩ
R17
100kΩ
390Ω
R34
15Ω
R35
C16
47µF
9V
C33
10µF
DZ1
BZX55C
10V
Q4
BC337
R14
27kΩ
Switching
Voltage
1nF
Tuner
AGC
Delay
P1
10kΩ
1
24
2
23
C15
100nF
C32
10nF
R13
330Ω
VIDEO SAW
FILTER
BGDKL
IF1
C17
10nF
SOUND SAW
FILTER
L STD
IF2
C18
1µF
3
22
4
21
R22
150Ω
LC1
6
19
68pF
C28
C20
47µF
C21
17
BFP
6.5MHz
CF2
BFP
5.5MHz
CF1
D2
C25
10µF
1N4148
D1
1N4148
7
8
STV8224B
18
R25
2.7kΩ
1.8kΩ
10
15
C26
100nF
R24
4.7kΩ
R27
R20
1kΩ
1.8kΩ
R21
C24
1nF
9
16
Level
Switch
5
6
8
C22
10µF
SW4
STD
R28
4.7kΩ
12
13
7
SW1
8.2µH
CF3
C27
470nF
Mute
TRAP FILTER
(5.5MHz - 6.5MHz)
L6
R26
3.9kΩ
Q3
BC547
+9V
11
14
C7
68nF
C23
10µF
STV8225
IC1
4
11
3
9
R12
2.2kΩ
R9
560Ω
BC547
Q2
R29
75Ω
75Ω
R18
R10
22Ω
+9V
470nF
C30
C31
100nF
+9V
CVBS
Output
(to SCART)
CVBS
Ouput
External
CVBS
Input
(From SCART)
P2
10kΩ
3.3kΩ
Switched
Sound
Output
Sound
Output
(To SCART)
External
Sound
Input
(From SCART)
R32
10kΩ
Volume Control
4.7µF
C6
10µF
220Ω
10
C8
R11
C12
100nF
10µF
C9
47µF
C11
12
C10
22µF
100nF
2
1
C13
10µF
13
14
38.9MHz
5
IC2
20
C29
10nF
C19
47nF
3.3µH
L4
L7
3.3µH
STV8224B
APPLICATION DIAGRAM (B/G/D/K, L)
STV8224B - STV8225
11/12
STV8224B
PACKAGE MECHANICAL DATA
24 PINS - PLASTIC SHRINK DIP
E
A2
A
L
A1
E1
Stand-o ff
B
B1
e
e1
e2
c
D
E
13
.015
F
24
0,38
12
e3
SDIP24
Dimensions
A
A1
B
B1
C
D
E
E1
e
e1
e2
e3
L
Min.
0.51
3.05
0.36
0.76
0.23
22.61
7.62
6.10
2.54
Millimeters
Typ.
3.30
0.46
1.02
0.25
22.86
6.40
1.778
7.62
3.30
Max.
5.08
4.57
0.56
1.14
0.38
23.11
8.64
6.86
10.92
1.52
3.81
e2
Min.
0.020
0.120
0.0142
0.030
0.0090
0.890
0.30
0.240
0.10
Inches
Typ.
0.130
0.0181
0.040
0.0098
0.90
0.252
0.070
0.30
0.130
Max.
0.20
0.180
0.0220
0.045
0.0150
0.910
0.340
0270
0.430
0.060
0.150
Information furni shed is believed to be accurate and reliable. However, SGS-THOMSON Micr oelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise und erany patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This pu blication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
 1997 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I 2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to
the I2C Standard Specifications as defined by Philips.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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12/12
SDIP24.TBL
1
PMSDIP24.EPS
Gage Plane