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LM1237 データシート(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM1237
部品情報  150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD and 4 DACs
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1237 データシート(HTML) 4 Page - National Semiconductor (TI)

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DAC Output Electrical Characteristics (Continued)
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-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
Max
Units
V
Max DAC
Mode 00
Max output voltage of DAC
Register Value = 0xFF,
DCF[1:0] = 00b
3.7
4.2
V
V
Max DAC
Mode 01
Max output voltage of DAC in DCF
mode 01
Register Value = 0xFF,
DCF[1:0] = 01b
1.85
2.35
V
∆V
Max DAC
(Temp)
Variation in voltage of DAC with
temperature
0 < T < 70˚C ambient
±0.5
mV/˚C
∆V
Max DAC (VCC)
Variation in voltage of DAC with
V
CC
4.75 < V
CC < 5.25V
±50
mV/V
Linearity
Linearity of DAC over its range
5
%
Monotonicity
Monotonicity of the DAC
Excluding dead zones
±0.5
LSB
I
MAX
Max Load Current
−1.0
1.0
mA
System Interface Signal Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-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
Max
Units
V
VTH+
VFLYBACK positive switching
guarantee.
Vertical Blanking triggered
2.0
V
V
SPOT
Spot Killer Voltage
Note 17, V
CC Adjusted to Activate
3.4
3.9
4.25
V
V
Ref
V
Ref Output Voltage
1.25
1.45
1.65
V
V
IL (SCL, SDA)
Logic Low Input Voltage
−0.5
1.5
V
V
IH (SCL, SDA)
Logic High Input Voltage
3.0
V
CC +
0.5
V
I
L (SCL, SDA)
Logic Low Input Current
SDA or SCL, Input Voltage = 0.4V
±10
µA
I
H (SCL, SDA)
Logic High Input Voltage
SDA or SCL, Input Voltage = 4.5V
±10
µA
V
OL (SCL, SDA)
Logic Low Output Voltage
I
O = 3 mA
0.5
V
f
H Min
Minimum Horizontal Frequency
PLL & OSD Operational; PLL
Range = 0
25
kHz
f
H Max
Maximum Horizontal Frequency
PLL & OSD Operational; PLL
Range = 3
110
kHz
I
HFB IN Max
Horizontal Flyback Input Current
Absolute Maximum During Flyback
5
mA
I
IN
Peak Current during flyback
Design Value
4
mA
I
HFB OUT Max
Horizontal Flyback Input Current
Absolute Maximum During Scan
−700
µA
I
OUT
Peak Current during Scan
Design Value
−550
µA
I
IN THRESHOLD
I
IN H-Blank Detection Threshold
0
µA
t
H-BLANK ON
H-Blank Time Delay - On
+ Zero crossing of I
HFB to 50% of
output blanking start. I
24 = +1.5mA
45
ns
t
H-BLANK OFF
H-Blank Time Delay - Off
− Zero crossing of I
HFB to 50% of
output blanking end. I
24 = −100µA
85
ns
V
BLANK Max
Maximum Video Blanking Level
Test Setting 4, AC input signal.
0
0.25
V
f
FREERUN
Free Run H Frequency, including H
Blank
42
kHz
t
PW CLAMP
Minimum Clamp Pulse Width
See Note 15
200
ns
V
CLAMP MAX
Maximum Low Level Clamp Pulse
Voltage
Video Clamp Functioning
2.0
V
V
CLAMP MIN
Minimum High Level Clamp Pulse
Voltage
Video Clamp Functioning
3.0
V
I
CLAMP Low
Clamp Gate Low Input Current
V
23 = 2V
−0.4
µA
I
CLAMP High
Clamp Gate High Input Current
V
23 = 3V
0.4
µA
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4


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