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參數資料
| 型號： | LM1276 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| 中文描述： | 150 MHz的I2C兼容的RGB前置放大器512個字符OSD光盤，512個字符RAM和4 DAC的內置 |
| 文件頁數： | 6/50頁 |
| 文件大小： | 2597K |
| 代理商： | LM1276 |
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OSD Electrical Characteristics
(Continued)
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
V
OSD-black
(Track)
Level and Video Black Level
between any 2 channels
Setting 8
V
OSD
(White)
Output Match between Channels
Palette Set at 111, OSD Contrast =
11, Maximum difference between R,
G and B
V
OSD-out
(Track)
Output Variation between Channels OSD contrast varied from max to
min
Conditions
Min
Typ
Max
Units
Difference between OSD Black
Register 0x8438=0x18, Input Video
= Black, Same Channel, Test
±
115
mV
3
%
3
%
DAC Output Electrical Characteristics
Unless otherwise noted: T
A
= 25C, V
CC
= +5.0V, V
IN
= 0.7V, V
ABL
= V
CC
, C
L
= 8 pF, Video Outputs = 2.0 V
P-P
. See (Note 7)
for Min and Max parameters and (Note 6) for Typicals. DAC parameters apply to all 4 DACs.
Symbol
Parameter
Conditions
Min
Typ
0.5
Max
0.7
Units
V
V
Min DAC
V
Max DAC
Mode 00
V
Max DAC
Mode 01
V
Max DAC
(Temp)
V
Max DAC
(V
CC
)
Min Output Voltage of DAC
Max Output Voltage of DAC
Register Value = 0x00
Register Value = 0xFF,
DCF[1:0] = 00b
Register Value = 0xFF,
DCF[1:0] = 01b
0
<
T
<
70C ambient
3.7
4.2
V
Max Output Voltage of DAC in
DCF Mode 01
DAC Output Voltage Variation
with Temperature
DAC Output Voltage Variation
with V
CC
Linearity of DAC over its Range
Monotonicity of the DAC
Excluding Dead Zones
Max Load Current
1.85
2.35
V
±
0.5
mV/C
V
CC
varied from 4.75V to 5.25V, DAC
register set to mid-range (0x7F)
50
mV
Linearity
Monotonicity
5
%
±
0.5
LSB
I
MAX
1.0
1.0
mA
System Interface Signal Characteristics
Unless otherwise noted: T
= 25C, V
= +5.0V, V
= 0.7V, V
= V
, C
= 8 pF, Video Outputs = 2.0 V
P-P
. See (Note 7)
for Min and Max parameters and (Note 6) for Typicals. DAC parameters apply to all 4 DACs.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
VTH+
VFLYBACK Positive Switching
Guarantee
Spot Killer Voltage
V
Ref
Output Voltage (pin 2)
Logic Low Input Voltage
Logic High Input Voltage
Vertical Blanking triggered
2.0
V
V
SPOT
V
Ref
V
IL
(SCL, SDA)
V
IH
(SCL, SDA)
(Note 17), V
CC
Adjusted to Activate
3.4
1.25
0.5
3.9
1.45
4.3
1.65
1.5
V
CC
+
0.5
V
V
V
3.0
V
I
L
(SCL, SDA)
I
H
(SCL, SDA)
V
OL
(SCL, SDA)
f
H
Min
f
H
Max
I
HFB IN
Max
Logic Low Input Current
Logic High Input Voltage
Logic Low Output Voltage
Minimum Horizontal Frequency
Maximum Horizontal Frequency
Horizontal Flyback Input
SDA or SCL, Input Voltage = 0.4V
SDA or SCL, Input Voltage = 4.5V
I
O
= 3 mA
PLL & OSD Functioning
PLL & OSD Functioning
Current Absolute Maximum during
Flyback
Design Value
Absolute Maximum during Scan
Not exact - Duty Cycle Dependent
±
10
±
10
0.5
25
110
μA
μA
V
kHz
kHz
5
mA
I
IN
I
HFB OUT
Max
I
OUT
I
IN THRESHOLD
Peak Current during Flyback
Horizontal Flyback Input Current
Peak Current during Scan
I
IN
H-Blank Detection Threshold
4
mA
μA
μA
μA
700
550
0
L
www.national.com
6
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