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LM1246 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM1246
Description  150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
Download  51 Pages
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM1246 Datasheet(HTML) 4 Page - National Semiconductor (TI)

 
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Video Signal Electrical Characteristics (Continued)
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, VIN = 0.70 VP-P,VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. 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
Max
Units
Vid
Threshold
Video Threshold
Normal Operation
80
mV
V
ABL TH
ABL Control Range Upper Limit
(Note 12), Test Setting 4, AC input
signal.
4.8
V
V
ABL Range
ABL Gain Reduction Range
(Note 12), Test Setting 4, AC input
signal.
2.8
V
A
V 3.5/AV Max
ABL Gain Reduction at 3.5V
(Note 12), Test Setting 4, AC input
signal. V
ABL = 3.5V
−2
dB
A
V 2.0/AV Max
ABL Gain Reduction at 2.0V
(Note 12), Test Setting 4, AC input
signal. V
ABL = 2.0V
−12
dB
I
ABL Active
ABL Input Bias Current during
ABL
(Note 12), Test Setting 4, AC input
signal. V
ABL =VABL MIN GAIN
10
µA
I
ABL Max
ABL Input Current Sink Capability (Note 12), Test Setting 4, AC input
signal.
1.0
mA
V
ABL Max
Maximum ABL Input Voltage
during Clamping
(Note 12), Test Setting 4, AC input
signal. I
ABL =IABL MAX
V
CC +
0.1
V
A
V ABL Track
ABL Gain Tracking Error
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.
4.5
%
R
IP
Minimum Input Resistance (pins
5, 6, 7)
Test Setting 4.
20
M
OSD Electrical Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V. See (Note 7) for Min and Max parameters and (Note 6) for Typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
OSDHIGH max
Maximum OSD Level with OSD
Contrast 11
Palette Set at 111, OSD Contrast =
11, RGB Gain = 96, DC Offset = 4
3.85
V
V
OSDHIGH 10
Maximum OSD Level with OSD
Contrast 10
Palette Set at 111, OSD Contrast =
10, RGB Gain = 96, DC Offset = 4
3.27
V
V
OSDHIGH 01
Maximum OSD Level with OSD
Contrast 01
Palette Set at 111, OSD Contrast =
01, RGB Gain = 96, DC Offset = 4
2.70
V
V
OSDHIGH 00
Maximum OSD Level with OSD
Contrast 00
Palette Set at 111, OSD Contrast =
00, RGB Gain = 96, DC Offset = 4
1.97
V
∆V
OSD (Black)
Difference between OSD Black
Level and Video Black Level (same
channel)
Register 08=0x18, Input Video =
Black, Same Channel, Test Setting
8
20
mV
∆V
BL,OSD-Video
(Ch to Ch)
Difference between OSD Black
Level and Video Black Level
between Channels
Register 08=0x18, Input Video =
Black, Same Channel, Test Setting
8
20
mV
∆V
OSD (White)
Output Match between Channels
Palette Set at 111, OSD Contrast =
11, Maximum difference between R,
G and B
3%
∆V
OSD/VVideo
(White)
Matching of OSD to Video peak to
peak amplitude ratios between
channels, normalized to the
smallest ratio.
Palette Set at 111, OSD Contrast =
10, Test Setting 4
3%
V
OSD-out (Track)
Output Variation between Channels OSD contrast varied from max to
min
3%
www.national.com
4


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