Page 1
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
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MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Pin Description
Pin no. Pin name Equivalent Circuit Diagram Function
1 VCC1
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 COUT
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
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MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
9 FC
Pin for adjusting LPF and BPF frequency
response.
Connect 10kΩ between this pin and ground.
10 NC2
NC pin
11 GND2
Y GND
12 YOUT
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 YIN
Luminance signal input pin.
16 V
CC2
Y power supply pin.
Absolute Maximum Ratings
(Ta=25°C)
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
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MITSUMI
Variable Gain Amplifier (built-in Y LPF, C BPF) MM1304
Electrical Characteristics
(Ta=25°C, VCC=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
VCC 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
V1 TP7
SG2 : sine wave 2V
P-P
100kHz V2=1.0V-7.5-6-4.5 dB
Voltage gain 2 G
V2 TP7 SG2 : sine wave 1VP-P 100kHz
-
1.5 0-1.5 dB
Voltage gain 3 G
V3 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
C2 TP7 SG2 : sine wave 1VP-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
V4 TP4 SG1 : sine wave 0.14VP-P V1=4.4V 9 13 15 dB
Voltage gain 5 G
V5 TP4 SG1 : sine wave 0.28 VP-P 379dB
Voltage gain 6 G
V6 TP4 SG1 : sine wave 0.56VP-P V1=1.1V
-
31 3dB
Voltage gain 7 G
V7 TP4 SG1 : sine wave 0.28VP-P SW3 : B
-
13 5dB
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
-
5dB
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
V8 TP4 SG1 : sine wave 0.28VP-P 379dB
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
-
5dB
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
T1 TP4
SG2 : sine wave 1V
P-P
4.43MHz SW1 : B
-
55-50 dB
C Y C
T2 TP7
SG1 : sine wave 0.28V
P-P
4.43MHz SW2 : B
-
55-50 dB
SW input voltage SW3~SW5 : C
GSW (H) V
IH1 TP4 SG1 : sine wave 0.28VP-P 4.43MHz 2.1 V
GSW (L) V
IL1 TP4 SG1 : sine wave 0.28VP-P 4.43MHz 0.7 V
FSW1 (H) V
IH2 TP4 SG1 : sine wave 0.28VP-P 4.43MHz 2.1 V
FSW1 (L) V
IL2 TP4 SG1 : sine wave 0.28VP-P 4.43MHz 0.7 V
FSW2 (H) V
IH3 TP7 SG2 : sine wave 1VP-P 4.43MHz 2.1 V
FSW2 (L) V
IL3 TP7 SG2 : sine wave 1VP-P 4.43MHz 0.7 V
Page 5
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, YOUT 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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