MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Variable Gain Amplifier (built-in Y LPF, C BPF)
Monolithic IC MM1304
Outline
This IC is a variable gain amp for video with built-in luminance low pass filter and chroma band pass filter. It
was developed as a post-filter for D/A converter latter position stage.
The sampling frequencies for the D/A converter are assumed to be 14.3MHz for chroma and 14.3MHz and
9.5MHz for luminance.
Features
1. Luminance LPF cutoff frequency can be selected and set at 5.4MHz and 4.4MHz. When set at 5.4MHz, use
in models that support S, and in normal models when set at 4.4MHz.
2. Chroma BPF center frequency can be selected and set at 3.58MHz (NTSC) and 4.4MHz (PAL).
3. Luminance variable gain range
-6dB~+6dB
Chroma variable gain range
-3dB~+9dB and ~1dB~13dB
4. Operating power supply voltage
4.5V~5.5V
5. Luminance S/N (unweight)
10kHz~4.2MHz : 47dB typ.
Package
SSOP-16A (MM1304XJ)
Applications
1. VCR with camera
2. Other video equipment
Equivalent Circuit Diagram
MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Pin Description
Pin no.
Pin name
Equivalent Circuit Diagram
Function
1
V
CC
1
2
C
IN
C power supply pin
Chroma signal input.
3
GSW
C gain switching pin.
Set at 7dB standard for low, and 3dB standard
for high.
4
CTL1
C gain control pin.
5
C
OUT
Chroma signal output pin.
6
FSW1
C BPF frequency switching pin.
Set at 3.58MHz BPF for high, and 4.43MHz
BPF for low.
7
GND1
C GND
8
NC1
NC pin
MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
9
FC
Pin for adjusting LPF and BPF frequency
response.
Connect 10k
between this pin and ground.
10
NC2
NC pin
11
GND2
Y GND
12
Y
OUT
Y output pin
13
FSW2
Y LPF frequency switching pin.
Set at 4.4MHz LPF for high, and 5.4MHz LPF
for low.
14
CTL2
Y gain control pin.
15
Y
IN
Luminance signal input pin.
16
V
CC
2
Y power supply pin.
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.
8
V
Allowable loss
Pd
500
mW
MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Electrical Characteristics
(Ta=25C, V
CC
=4.75V, V1=2.2V, V2=2.1V, SG1~SG2 : no signal, SW1~SW5 : A)
Item
Symbol
Measurement
Measurement conditions
Min. Typ. Max. Units
circuit
Operating power supply voltage
V
CC
4.5
4.75
5.5
V
Consumption current
I
CC
10.6
13
mA
Y subsystem cutoff frequency 5.4 MHz
Voltage gain 1
G
V
1
TP7
SG2 : sine wave 2V
P-P
100kHz V2=1.0V
-7.5
-6
-4.5
dB
Voltage gain 2
G
V
2
TP7
SG2 : sine wave 1V
P-P
100kHz
-1.5
0
-1.5
dB
Voltage gain 3
G
V
3
TP7
SG2 : sine wave 0.5V
P-P
100kHz V2=4.2V 4.5
6
7.5
dB
Cutoff frequency 5.4 MHz
fc1
TP7
SG2 : sine wave 1V
P-P
5
MHz
Frequency characteristic 1
Gf1
TP7
SG2 : sine wave 1V
P-P
14.5MHz
-30
dB
Group delay characteristic 1
td1
TP7
SG2 : sine wave 1V
P-P
100kHz
85
105
125
nS
Group delay characteristic 2
td2
TP7
SG2 : sine wave 1V
P-P
1MHz
90
110
130
nS
S/N
S
N
TP7
SG2 : white 50% video signal
-47
-43
dB
Y subsystem cutoff frequency 4.4 MHz SW5 : B
Cutoff frequency 5.4 MHz
f
C
2
TP7
SG2 : sine wave 1V
P-P
4
MHz
Frequency characteristic 2
Gf1
TP7
SG2 : sine wave 1V
P-P
9.5MHz
-25
dB
Group delay characteristic 3
td3
TP7
SG1 : sine wave 1V
P-P
100kHz
105
125
145
nS
Group delay characteristic 4
td4
TP7
SG2 : sine wave 1V
P-P
1MHz
110
130
150
nS
C system NTSCExcept where noted otherwise, SW4 : B
Voltage gain 4
G
V
4
TP4
SG1 : sine wave 0.14V
P-P
V1=4.4V
9
13
15
dB
Voltage gain 5
G
V
5
TP4
SG1 : sine wave 0.28 V
P-P
3
7
9
dB
Voltage gain 6
G
V
6
TP4
SG1 : sine wave 0.56V
P-P
V1=1.1V
-3
1
3
dB
Voltage gain 7
G
V
7
TP4
SG1 : sine wave 0.28V
P-P
SW3 : B
-1
3
5
dB
Frequency characteristic 3
Gf3
TP4
SG1 : sine wave 0.28V
P-P
2.78MHz
-5.5 -3.5
+2
dB
Frequency characteristic 4
Gf4
TP4
SG1 : sine wave 0.28V
P-P
4.38MHz
-7.5 -3.5
+2
dB
Frequency characteristic 5
Gf5
TP4
SG1 : sine wave 0.28V
P-P
1.08MHz
-10
dB
Frequency characteristic 6
Gf6
TP4
SG1 : sine wave 0.28V
P-P
6.08MHz
-5
dB
Frequency characteristic 7
Gf7
TP4
SG1 : sine wave 0.28V
P-P
10MHz
-20
dB
Frequency characteristic 8
Gf8
TP4
SG1 : sine wave 0.28V
P-P
15MHz
-30
dB
Group delay characteristic 5
td5
TP4
SG1 : sine wave 0.28V
P-P
230
310
340
nS
Group delay characteristic 6
td6
TP4
SG1 : sine wave 0.28V
P-P
2.78MHz
160
240
320
nS
Group delay characteristic 7
td7
TP4
SG1 : sine wave 0.28V
P-P
4.38MHz
150
200
250
nS
C system PALExcept where noted otherwise, SG1 : f=4.43MHz
Voltage gain 8
G
V
8
TP4
SG1 : sine wave 0.28V
P-P
3
7
9
dB
Frequency characteristic 9
Gf9
TP4
SG1 : sine wave 0.28V
P-P
3.63MHz
-5.5 -2.2
+2
dB
Frequency characteristic 10
Gf10
TP4
SG1 : sine wave 0.28V
P-P
5.23MHz
-7.5 -3.0
+2
dB
Frequency characteristic 11
Gf11
TP4
SG1 : sine wave 0.28V
P-P
1.93MHz
-10
dB
Frequency characteristic 12
Gf12
TP4
SG1 : sine wave 0.28V
P-P
6.93MHz
-5
dB
Frequency characteristic 13
Gf13
TP4
SG1 : sine wave 0.28V
P-P
10MHz
-15
dB
Frequency characteristic 14
Gf14
TP4
SG1 : sine wave 0.28V
P-P
15MHz
-30
dB
Group delay characteristic 8
td8
TP4
SG1 : sine wave 0.28V
P-P
180
260
290
nS
Group delay characteristic 9
td9
TP4
SG1 : sine wave 0.28V
P-P
3.63MHz
120
200
280
nS
Group delay characteristic 10 td10
TP4
SG1 : sine wave 0.28V
P-P
5.23MHz
130
200
250
nS
Crosstalk
Y C
C
T
1
TP4
SG2 : sine wave 1V
P-P
4.43MHz SW1 : B
-55
-50
dB
C Y
C
T
2
TP7
SG1 : sine wave 0.28V
P-P
4.43MHz SW2 : B
-55
-50
dB
SW input voltage SW3~SW5 : C
GSW (H)
V
IH
1
TP4
SG1 : sine wave 0.28V
P-P
4.43MHz
2.1
V
GSW (L)
V
IL
1
TP4
SG1 : sine wave 0.28V
P-P
4.43MHz
0.7
V
FSW1 (H)
V
IH
2
TP4
SG1 : sine wave 0.28V
P-P
4.43MHz
2.1
V
FSW1 (L)
V
IL
2
TP4
SG1 : sine wave 0.28V
P-P
4.43MHz
0.7
V
FSW2 (H)
V
IH
3
TP7
SG2 : sine wave 1V
P-P
4.43MHz
2.1
V
FSW2 (L)
V
IL
3
TP7
SG2 : sine wave 1V
P-P
4.43MHz
0.7
V
MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Measuring Circuit
Characteristics
(IC internal filters)
*
1 Design so that , to the extent possible, Y
OUT
pin and FC pin are not capacitance coupled. Filter frequency
response may be affected.
*
2 Connect NC2 pin to ground.
*
3 Use component with 1% precision.
1. LPF
(dB)
0
-10
-20
-30
100k
1M
10M
100M (Hz)
(dB)
0
-10
-20
-30
100k
1M
10M
100M (Hz)
2. BPF
(dB)
0
-10
-20
-30
1M
10M
100M (Hz)
(dB)
0
-10
-20
-30
1M
10M
100M (Hz)
5.4MHzLPF Amplitude-Frequency response
4.4MHzLPF Amplitude-Frequency response
3.58MHzBPF Amplitude-Frequency response
4.43MHzBPF Amplitude-Frequency response
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