LM1276 National Semiconductor Corporation, LM1276 Datasheet - Page 6

• Manufacturer Part Number: LM1276
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 512 Character Osd Rom, 512 Character Ram And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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