參數(shù)資料
型號(hào): LM1247
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): 3/48頁
文件大小: 3141K
代理商: LM1247
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
P-P
. Setting
numbers refer to the definitions in
Table 1
. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
ABL
TH
ABL Control Range upper limit
(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
(Note 12), Test Setting 4, AC input
signal.
(Note 12), Test Setting 4, AC input
signal. I
ABL
= I
ABL
MAX
(Note 9), Test Setting 4, 0.7 V
P-P
input signal, ABL voltage set to 4.5V
and 2.5V.
Test Setting 4.
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
10
μA
I
ABL
Max
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, Test Setting 3
V
OSDHIGH
10
Maximum OSD Level with OSD
Contrast 10
10, Test Setting 3
V
OSDHIGH
01
Maximum OSD Level with OSD
Contrast 01
01, Test Setting 3
V
OSDHIGH
00
Maximum OSD Level with OSD
Contrast 00
00, Test Setting 3
V
OSD
(Black)
Difference between OSD Black
Level and Video Black Level (same
channel)
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
Palette Set at 111, OSD Contrast =
4.5
V
Palette Set at 111, OSD Contrast =
3.9
V
Palette Set at 111, OSD Contrast =
3.2
V
Palette Set at 111, OSD Contrast =
2.4
V
Register 08=0x18, Input Video =
Black, Same Channel, Test Setting
20
mV
3
%
3
%
DAC Output Electrical 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
0.5
Max
0.7
Units
V
V
Min DAC
V
Max DAC
Mode 00
V
Max DAC
Mode 01
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
3.7
4.2
V
Max output voltage of DAC in
DCF mode 01
1.85
2.35
V
L
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