參數(shù)資料
型號: LM1246AAA
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(gè)字符OSD光盤,512個(gè)字符RAM和4 DAC的內(nèi)置
文件頁數(shù): 4/51頁
文件大?。?/td> 2794K
代理商: LM1246AAA
Video Signal Electrical Characteristics
(Continued)
Unless otherwise noted: T
= 25C, V
= +5.0V, V
= 0.70 V
, V
= V
, C
= 8 pF, Video Outputs = 2.0 V
. Setting
numbers refer to the definitions in
Table 1. Test Settings
. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
80
Max
Units
mV
Vid
Threshold
V
ABL
TH
Video Threshold
ABL Control Range Upper Limit
Normal Operation
(Note 12), Test Setting 4, AC input
signal.
(Note 12), Test Setting 4, AC input
signal.
(Note 12), Test Setting 4, AC input
signal. V
ABL
= 3.5V
(Note 12), Test Setting 4, AC input
signal. V
ABL
= 2.0V
(Note 12), Test Setting 4, AC input
signal. V
ABL
= V
ABL
MIN GAIN
4.8
V
V
ABL
Range
ABL Gain Reduction Range
2.8
V
A
V 3.5
/A
V Max
ABL Gain Reduction at 3.5V
2
dB
A
V 2.0
/A
V Max
ABL Gain Reduction at 2.0V
12
dB
I
ABL
Active
ABL Input Bias Current during
ABL
ABL Input Current Sink Capability (Note 12), Test Setting 4, AC input
10
μA
I
ABL
Max
signal.
(Note 12), Test Setting 4, AC input
signal. I
ABL
= I
ABL
MAX
Table 9. Page RAM Format (9-bit
mode)
, Test Setting 4, 0.7 V
P-P
input
signal, ABL voltage set to 4.5V and
2.5V.
Test Setting 4.
1.0
mA
V
ABL
Max
Maximum ABL Input Voltage
during Clamping
ABL Gain Tracking Error
V
CC
+
0.1
V
A
V
ABL Track
4.5
%
R
IP
Minimum Input Resistance (pins
5, 6, 7)
20
M
OSD Electrical Characteristics
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
OSDHIGH
max
Maximum OSD Level with OSD
Contrast 11
11, RGB Gain = 96, DC Offset = 4
V
OSDHIGH
10
Maximum OSD Level with OSD
Contrast 10
10, RGB Gain = 96, DC Offset = 4
V
OSDHIGH
01
Maximum OSD Level with OSD
Contrast 01
01, RGB Gain = 96, DC Offset = 4
V
OSDHIGH
00
Maximum OSD Level with OSD
Contrast 00
00, RGB Gain = 96, DC Offset = 4
V
OSD
(Black)
Difference between OSD Black
Level and Video Black Level (same
channel)
8
V
BL,OSD-Video
(Ch to Ch)
Level and Video Black Level
between Channels
8
V
OSD
(White)
Output Match between Channels
Palette Set at 111, OSD Contrast =
11, Maximum difference between R,
G and B
V
OSD
/V
Video
(White)
peak amplitude ratios between
channels, normalized to the
smallest ratio.
V
OSD-out
(Track)
Output Variation between Channels OSD contrast varied from max to
min
Conditions
Min
Typ
Max
Units
Palette Set at 111, OSD Contrast =
3.85
V
Palette Set at 111, OSD Contrast =
3.27
V
Palette Set at 111, OSD Contrast =
2.70
V
Palette Set at 111, OSD Contrast =
1.97
V
Register 08=0x18, Input Video =
Black, Same Channel, Test Setting
20
mV
Difference between OSD Black
Register 08=0x18, Input Video =
Black, Same Channel, Test Setting
20
mV
3
%
Matching of OSD to Video peak to
Palette Set at 111, OSD Contrast =
10, Test Setting 4
3
%
3
%
L
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