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LM1276 データシート(PDF) 7 Page - Texas Instruments

部品番号 LM1276
部品情報  Compatible RGB Preamplifier
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ホームページ  http://www.ti.com
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LM1276 データシート(HTML) 7 Page - Texas Instruments

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OBSOLETE
LM1276
www.ti.com
SNOSAB9B – MAY 2005 – REVISED APRIL 2013
System Interface Signal Characteristics
Unless otherwise noted: TA = 25°C, VCC = +5.0V, VIN = 0.7V, VABL = VCC, CL = 8 pF, Video Outputs = 2.0 VP-P. See
(1) for Min
and Max parameters and see
(2) for Typicals. DAC parameters apply to all 4 DACs.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VVTH+
VFLYBACK Positive Switching
Vertical Blanking triggered
2.0
V
ensure
VSPOT
Spot Killer Voltage
VCC Adjusted to Activate
(3)
3.4
3.9
4.3
V
VRef
VRef Output Voltage (pin 2)
1.25
1.45
1.65
V
VIL (SCL, SDA)
Logic Low Input Voltage
−0.5
1.5
V
VIH (SCL, SDA)
Logic High Input Voltage
VCC +
3.0
V
0.5
IL (SCL, SDA)
Logic Low Input Current
SDA or SCL, Input Voltage = 0.4V
±10
µA
IH (SCL, SDA)
Logic High Input Voltage
SDA or SCL, Input Voltage = 4.5V
±10
µA
VOL (SCL, SDA)
Logic Low Output Voltage
IO = 3 mA
0.5
V
fH Min
Minimum Horizontal Frequency
PLL and OSD Functioning
25
kHz
fH Max
Maximum Horizontal Frequency
PLL and OSD Functioning
110
kHz
IHFB IN Max
Horizontal Flyback Input
Current Absolute Maximum during
5
mA
Flyback
IIN
Peak Current during Flyback
Design Value
4
mA
IHFB OUT Max
Horizontal Flyback Input Current
Absolute Maximum during Scan
−700
µA
IOUT
Peak Current during Scan
Not exact - Duty Cycle Dependent
−550
µA
IIN THRESHOLD
IIN H-Blank Detection Threshold
0
µA
tH-BLANK ON
H-Blank Time Delay - On
+ Zero crossing of IHFB to 50% of output
45
ns
blanking start. I24 = +1.5mA
tH-BLANK OFF
H-Blank Time Delay - Off
− Zero crossing of IHFB to 50% of output
85
ns
blanking end. I24 = −100µA
VBLANK Max
Maximum Video Blanking Level
Test Setting 4, AC input signal
0
0.25
V
fFREERUN
Free Run H Frequency, Including H
42
kHz
Blank
tPW CLAMP
Minimum Clamp Pulse Width
See(4)
200
ns
VCLAMP MAX
Maximum Low Level Clamp Pulse
Video Clamp Functioning
2.0
V
Voltage
VCLAMP MIN
Minimum High Level Clamp Pulse
Video Clamp Functioning
3.0
V
Voltage
ICLAMP Low
Clamp Gate Low Input Current
V23 = 2V
−0.4
µA
ICLAMP High
Clamp Gate High Input Current
V23 = 3V
0.4
µA
tCLAMP-VIDEO
Time from End of Clamp Pulse to
Referenced to Blue, Red and Green
50
ns
Start of Video
inputs
(1)
Data sheet min/max specification limits are specified by design, test, or statistical analysis. The ensured specifications apply only for the
test conditions listed. Some performance characteristics may change when the device is not operated under the listed test conditions.
(2)
Typical specifications are specified at +25°C and represent the most likely parametric norm.
(3)
Once the spot killer has been activated, the LM1276 remains in the off state until VCC is cycled (reduced below 0.5V and then restored
to 5V).
(4)
A minimum pulse width of 200 ns is the specified minimum for a horizontal line of 15 kHz. This limit is specified by design. If a lower line
rate is used then a longer clamp pulse may be required.
Copyright © 2005–2013, Texas Instruments Incorporated
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