MITSUMI
S Video Amplifier MM1024
S Video Amplifier
Monolithic IC MM1024
Outline
This is a video amp IC that supports S and also has border and superimpose functions.
Amp gain is as follows : 6dB for Y signal amplification, 10dB for C signal amplification and 6dB for composite
signal amplification. A 75
driver is built in.
Features
1. Supports S-VHS
2. Built-in superimpose function (character and border levels)
3. Built-in Y-C mix circuit
4. Vertical/horizontal sync signal output pin
5. Amp gain : 6dB for Y signal, 10dB for C signal and 6dB for composite signal
6. Built-in clamp circuit (for Y signal only)
7. 75
driver built in
8. Frequency response
Y : 7MHz
C : 5MHz
9. Power supply voltage 4.7V~5.3V
Package
SOP-16A (MM1024AF)
Applications
1. TV
2. VCR
3. VCR with camera
4. Other video equipment
MITSUMI
S Video Amplifier MM1024
Pin Description
Pin no.
Pin name
Function
1
R
Integrates sync signal and inputs to Schmidt circuit
2
C
3
PB
IN
Chroma signal input pin for other than playback
4
V
SYNC OUT
Vertical sync signal output pin
5
PB
IN
Chroma signal input pin for playback
6
Chroma mute input
Chroma mute signal input pin
7
C
HROMA OUT
Chroma signal output pin
8
GND
9
SUG
Anti-sag pin
10
V
IDEO OUT
Composite video signal output pin
11
Y
OUT
Y (luminance) signal output pin
12
SUG
Anti-sag pin
13
Character input
Character input pin for superimpose
14
Bordering input
Bordering input pin
15
Y
RO
V
IDEO IN
Luminance or video signal input pin
16
V
CC
Absolute Maximum Ratings
(Ta=25C)
Item
Symbol
Ratings
Units
Storage temperature
T
STG
-40~+125
C
Operating temperature
T
OPR
-20~+75
C
Power supply voltage
V
CC
max.
7
V
Allowable loss
P
d
350
mW
Block Diagram
MITSUMI
S Video Amplifier MM1024
Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
=5.0V, pulse level 0V, SW1 : A, SW2 :
Item
Symbol
Measurement
Measurement conditions
Min. Typ. Max. Units
circuit
Operating power supply voltage
V
CC
V
CC
4.7
5.0
5.3
V
Consumption current
Id
-
SG-1, SG-2, SG-3 : No signal
Measure with DC ammeter.
25.0 33.0 mA
Y amp output
Voltage gain
G
V
1
TP11
SG-1, sweep signal
1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
Differential gain
DG1
TP10
SG-1, staircase wave, 1V
P-P
APL=10, 50, 90%
1.0
3.0
%
Differential phase
DP1
TP10
SG-1, staircase wave, 1V
P-P
APL=10, 50, 90%
1.0
3.0
deg
Frequency characteristic
fc1
TP11
SG-1, sweep signal, 1V
P-P
5MHz/0.1MHz
*
1
-1.0
0
1.0
dB
Video amp output
Voltage gain
G
V
2
TP8
SG-1 sweep signal
1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
Differential gain
DG2
TP9
SG-1, staircase wave 1V
P-P
APL=10, 50, 90%
1.0
3.0
%
Differential phase
DP2
TP9
SG-1, staircase wave, 1V
P-P
APL=10, 50, 90%
1.0
3.0
deg
Frequency characteristic
fc2
TP8
SG-1 sweep signal 1V
P-P
5MHz/0.1MHz
*
2
-1.0
0
1.0
dB
Chroma amp
Voltage gain
G
V
3
TP7
SG-2, sine wave, 0.2V
P-P
, 0.1MHz
9.0
10.0 11.0
dB
Frequency characteristic
fc3
TP7
SG-2, sine wave, 0.2V
P-P
5MHz/0.1MHz
*
3
-1.0
0
1.0
dB
Crosstalk
Crosstalk 1 Y
IN
C
OUT
C
T
1
TP7
SG-1, sine wave, 1.0V
P-P,
4MHz
*
2
-36
-30
dB
Crosstalk 2 P
B
Y
OUT
C
T
2
TP11
SG-2, sine wave, 0.2V
P-P
, 4MHz
*
3
-42
-36
dB
Crosstalk 3 P
B
Y
OUT
C
T
3
TP11
SG-3, sine wave, 0.2V
P-P
, 4MHz
SW2 : A
*
3
-42
-36
dB
Crosstalk 4 P
B
C
OUT
C
T
4
TP7
SG-1, sine wave,0.2V
P-P
, 4MHz
*
4
-50
-40
dB
Superimpose
Edge level Y
V
EDY
TP10
SG-1, staircase wave (no chroma signal)
1V
P-P
, TP13, pulse level, 5V
0
5
10
IRE
Edge level V
V
EDV
TP9
SG-1, staircase wave (no chroma signal)
1V
P-P
, TP13, pulse level, 5V
0
5
10
IRE
Character level Y
V
CHY
TP10
SG-1, staircase wave (no chroma signal)
1V
P-P
, TP12, 13, pulse level, 5V
60
65
70
IRE
Character level V
V
CHV
TP9
SG-1, staircase wave (no chroma signal)
1V
P-P
, TP12, 13 pulse level 5V
60
65
70
IRE
Input threshold voltage
V
TH
1
TP13
SG-1, staircase wave (no chroma signal)
Bordering input
1V
P-P
, TP13, pulse level, L H
*
5
0.7
1.4
2.1
V
Character input
V
TH
2
TP12
SG-1, staircase wave (no chroma signal)
1V
P-P
TP12, 13, pulse level, L H
*
5
0.7
1.4
2.1
V
V
TH
3
TP5
SG-2, sine wave, 0.1V
P-P
, 4MHz
Chroma mute input
TP5, pulse level, L H
*
6
0.7
1.4
2.1
V
Sync separation
V
SEPA
TP14
SG-1, staircase wave (no chroma signal) 1V
P-P
Sync separation level
SG-1, SYNC level, max min
*
7
55
110
165
mV
Schmitt trigger
V
TH
4
H
TP1
TP1, DC voltage, 0V H
*
8
1.9
2.1
2.3
V
threshold voltage
V
TH
4
L
TP1, DC voltage, 5V L
*
8
1.1
1.3
1.5
V
Vertical sync output voltage
V
VH
TP3
TP1, DC voltage, 5V L
*
9
4.8
5.0
V
V
VL
TP1, DC voltage, 0V H
*
9
0.2
0.4
V
MITSUMI
S Video Amplifier MM1024
Notes :
*
1
1.Voltage gain G
V
1, G
V
2, G
V
3
Given SG-1 input as V1 and TP11 output signal as V2, G
V
1 is obtained as follows.
The same applies for G
V
2 and G
V
3.
V2
GV1=20LOG [dB]
V1
2.Frequency response f
C
1, f
C
2, f
C
3
For the same conditions as the G
V
1 measurement, given TP11 output for 0.1MHz as V3, and
for 5MHz as V1, Fc1 is obtained as follows. The same applies for fc2 and fc3.
V4
fc1=20LOG [dB]
V3
*
2
Crosstalk Y
IN
C
OUT
C
T
1
Given TP14 input signal as V5 and TP7 output signal as V6, CT1 is obtained as follows.
V6
C
T
1=20LOG [dB]
V5
*
3
Crosstalk P
B
, P
B
Y
OUT
C
T
2, C
T
3
Give TP2 and TP4 input signals as V7, and TP11 output signal as V8, C
T
2 and C
T
3 are obtained
as follows.
V8
C
T
2=20LOG [dB]
V7
1.When C is input to compare between Y
IN
C
OUT
and C
IN
Y
OUT
, subtract the 4dB amp
portion from crosstalk.
*
4
Crosstalk PB C
OUT
CT4
Given TP4 input signal as V9 and TP7 output signal as V10, CT4 is obtained as follows.
V10
C
T
4=20LOG [dB]
V9
*
5
Input threshold voltage Bordering input, character input V
TH
1, V
TH
2
For the same conditions as V
EDY
and V
CHY
measurement, raise TP13 and TP12 pulse levels
gradually. TP13 and TP12 pulse levels when bordering signal and character signal appear on
TP11 are, respectively, V
TH
1 and V
TH
2.
*
6
Input threshold voltage Chroma mute input V
TH
3
Gradually raise TP5 pulse level. TP5 pulse level when a sine wave is no longer output on TP7 is
V
TH
3.
*
7
Sync separation level V
SEPA
Gradually reduce SG-1 SYNC level from maximum to minimum. Measure the SYNC signal
level at TP14 when a sync separation signal is no longer output on TP15 to obtain V
SEPA
.
*
8
Schmidt trigger threshold level V
TH
4
H
, V
TH
4
L
Impress external DC voltage on TP1 and gradually raise from 0V. TP1 level when TP3 level
goes from high to low is V
TH
4
H
. Gradually lower from 5V. TP1 level when TP3 level goes from
low to high is V
TH
4
L
.
*
9
Vertical sync output voltage V
VH
, V
VL
TP3 low level for T
TH
4
H
measurement is V
VL
, and TP3 high level for V
TH
4
L
is Vvh.
MITSUMI
S Video Amplifier MM1024
Measuring Circuit
Application Circuits
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