LM1237 National Semiconductor Corporation, LM1237 Datasheet - Page 4

• Manufacturer Part Number: LM1237
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 254 Character Osd And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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V
∆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
Min DAC
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.
Note 1: Limits of Absolute Maximum Ratings indicate below which damage to the device must not occur.
(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
)
Min output voltage of DAC
Variation in voltage of DAC with
temperature
Variation in voltage of DAC with
V
Linearity of DAC over its range
Monotonicity of the DAC
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 Current
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
A
A
= 25˚C, V
= 25˚C, V
Parameter
Parameter
CC
CC
= +5.0V, V
= +5.0V, V
IN
IN
Register Value = 0x00
0
4.75
Excluding dead zones
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
Absolute Maximum During Flyback
Design Value
Absolute Maximum During Scan
Design Value
+ 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
= 0.7V, V
= 0.7V, V
O
23
23
<
= 3 mA
= 2V
= 3V
T
<
<
V
4
70˚C ambient
CC
ABL
ABL
(Continued)
CC
Conditions
Conditions
<
= V
= V
Adjusted to Activate
5.25V
CC
CC
HFB
HFB
, C
, C
24
24
L
L
to 50% of
to 50% of
= −100µA
= 8 pF, Video Outputs = 2.0 V
= 8 pF, Video Outputs = 2.0 V
= +1.5mA
−700
−1.0
1.25
−0.5
Min
Min
200
2.0
3.4
3.0
3.0
50
0
0.5
−550
±
±
−0.4
1.45
Typ
±
Typ
±
±
110
3.9
0.5
0.4
25
45
85
42
0.5
5
0.5
4
0
50
10
10
P-P
P-P
V
. See Note 7
. See Note 7
Max
Max
4.25
1.65
0.25
0.7
1.0
1.5
CC
0.5
2.0
5
+
mV/˚C
Units
Units
mV/V
LSB
kHz
kHz
kHz
mA
mA
mA
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
%
V
V
V
V
V
V
V
V
V
V