LM1247 National Semiconductor, LM1247 Datasheet - Page 4

• Manufacturer Part Number: LM1247
• Description: 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
• Manufacturer: National Semiconductor

www.national.com
∆V
(Temp)
∆V
Linearity
Monotonicity
I
V
V
V
V
V
I
I
V
f
f
I
I
I
I
I
t
t
V
f
t
V
V
I
I
t
MAX
L
H
H
H
HFB IN
IN
HFB OUT
OUT
IN THRESHOLD
H-BLANK ON
H-BLANK OFF
FREERUN
PW CLAMP
CLAMP
CLAMP
CLAMP-VIDEO
VTH+
SPOT
Ref
IL
IH
OL
BLANK
CLAMP MAX
CLAMP MIN
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
Max DAC
Max DAC
(SCL, SDA)
(SCL, SDA)
(SCL, SDA)
Symbol
Symbol
Max
Low
High
Max
Max
(V
CC
)
Variation in voltage of DAC 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
H-Blank Time Delay - On
H-Blank Time Delay - Off
Maximum Video Blanking Level
Free Run H Frequency, including
H Blank
Minimum Clamp Pulse Width
Maximum Low Level Clamp
Pulse Voltage
Minimum High Level Clamp
Pulse Voltage
Clamp Gate Low Input Current
Clamp Gate High Input Current
Time from End of Clamp Pulse to
Start of Video
IN
CC
Ref
H-Blank Detection Threshold
Output Voltage (pin 2)
A
A
= 25˚C, V
= 25˚C, V
Parameter
Parameter
CC
CC
= +5.0V, V
= +5.0V, V
IN
IN
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 Operational; PLL Range
= 0
PLL & OSD Operational; PLL Range
= 3
Current Absolute Maximum During
Flyback
Design Value
Absolute Maximum During Scan
Not exact - Duty Cycle Dependent
+ Zero crossing of I
output blanking start. I
− Zero crossing of I
output blanking end. I
Test Setting 4, AC input signal
See (Note 15)
Video Clamp Functioning
Video Clamp Functioning
V
V
Referenced to Blue, Red and Green
inputs
O
CC
23
23
<
= 0.7V, V
= 0.7V, V
= 3 mA
= 2V
= 3V
T
varied from 4.75V to 5.25V, DAC
<
70˚C ambient
4
ABL
ABL
CC
(Continued)
Conditions
Conditions
Adjusted to Activate
= V
= V
HFB
HFB
CC
CC
24
24
, C
, C
to 50% of
to 50% of
= −100µA
= +1.5mA
L
L
= 8 pF, Video Outputs = 2.0 V
= 8 pF, Video Outputs = 2.0 V
−700
−1.0
1.25
−0.5
Min
Min
200
2.0
3.4
3.0
3.0
50
0
−550
±
±
−0.4
1.45
Typ
Typ
±
±
110
3.9
0.5
0.4
50
25
45
85
42
0.5
5
0.5
4
0
10
10
P-P
P-P
V
. See (Note 7)
. See (Note 7)
Max
Max
1.65
0.25
1.0
4.3
1.5
CC
0.5
2.0
5
+
mV/˚C
Units
Units
LSB
kHz
kHz
kHz
mV
mA
mA
mA
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
%
V
V
V
V
V
V
V
V
V