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LM1270 データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM1270
部品情報  Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing
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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)

LM1270 データシート(HTML) 3 Page - National Semiconductor (TI)

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Active Video Signal Electrical Characteristics (Continued)
Unless otherwise noted: T
A = 25˚C, VCC = +5V, VIN = 0.7V, CL = 5 pF, Video Signal Output = 0.7VP-P.
Symbol
Parameter
Conditions
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
Units
I
CLAMP HIGH
Clamp Gate Input Current
Default Mode, V
24 = 4V
0.5
0.7
0.9
mA
t
PW CLAMP
Back Porch Clamp Pulse Width
Default Mode (Note 15)
200
ns
t
CLAMP-VIDEO
End of Clamp Pulse to Start of
Active Video
Default Mode, Limit Is Guaranteed
by Design
50
ns
V
CLAMP HIGH OUT
Clamp Gate High Output Voltage
Internal Clamp Is Output at Pin 24
3.2
V
I
CLAMP HIGH OUT
Clamp Gate High Output Current
Internal Clamp Is Output at Pin 24
10
µA
V
CLAMP LOW OUT
Clamp Gate Low Output Voltage
Internal Clamp Is Output at Pin 24
0.4
V
I
CLAMP LOW OUT
Clamp Gate Low Output Current
Internal Clamp Is Output at Pin 24
−10
µA
R
IN-VIDEO
Input Resistance
20
M
V
REF REXT
V
REF REXT Output Voltage
10 k
Ω, 1% Resistor; Pin 23 to GND
1.26
1.44
1.64
V
V
SPOT
Spot Killer Voltage
V
CC Adjusted to Activate
3.40
4.0
4.25
V
External Interface Signals Electrical Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5V, VIN = 0.7V, CL = 5 pF, Video Output = 0.7 VP-P.
Symbol
Parameter
Conditions
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
Units
V
L(I
2C)
I
2C compatible Low Input Voltage
SDA or SCL Inputs
−0.5
1.5
V
V
H(I
2C)
I
2C compatible High Input Voltage
SDA or SCL Inputs
3.0
V
CC +
0.5
V
I
L(I
2C)
I
2C compatible Low Input Current
SDA or SCL, Input Voltage = 0.4V
±10
µA
I
H(I
2C)
I
2C compatible High Input Current
SDA or SCL, Input Voltage = 4.5V
±10
µA
V
OL(I
2C)
I
2C compatible Low Output Voltage I
O = 3 mA
0.5
V
I
IN THRESHOLD
I
IN H-Flyback Detection Threshold
−35
µA
I
IN-OPERATING
Minimum — Insure Normal
Operation
Lowest Operating Horizontal
Frequency in Given Application
(Note 15)
−50
µA
Maximum — Should Not Exceed in
Normal Operation
−550
I
IN FLYBACK
Peak Current during Flyback
Period, Recommended Design
Range
Operating Range for All Horizontal
Scan Frequencies, Maximum
Current Should Not Exceed 4 mA
(Note 15)
2.0
3.0
4.0
mA
Note 1: Limits of Absolute Maximum Ratings indicate limits below which damage to the device must not occur.
Note 2: Limits of operating ratings indicate required boundaries of conditions for which the device is functional, but may not meet specific performance limits.
Note 3: All voltages are measured with respect to GND, unless otherwise specified.
Note 4: Human body model, 100 pF capacitor discharged through a 1.5 k
Ω resistor.
Note 5: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200 pF capacitor is charged to the specified voltage, then discharged directly into
the IC with no external series resistor (resistance of discharge path must be under 50
Ω).
Note 6: Typical specifications are specified at +25˚C and represent the most likely parametric norm.
Note 7: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: The supply current specified is the quiescent current for VCC with RL = . Load resistors are not required and are not used in the test circuit, therefore all
the supply current is used by the pre-amp.
Note 9: Linearity Error is the variation in step height of a 16 step staircase input signal waveform with a 0.7 VP-P level at the input, subdivided into 16 equal steps,
with each step approximately 100 ns in width.
Note 10: Input from signal generator: tr,tf < 1 ns. Scope and generator response used for testing: tr = 1.1 ns, tf = 0.9 ns. Using the RSS technique the scope and
generator response have been removed from the output rise and fall times.
Note 11:
∆AV track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three gain stages. It is the difference in
gain change between any two amplifiers with the contrast set to AV 1/2 and measured relative to the AV max condition. For example, at AV max the three amplifiers’
gains might be 0.1 dB, −0.1 dB, and −0.2 dB and change to −5.2 dB, −4.9 dB and −4.7 dB respectively for contrast set to AV 1/2. This yields a typical gain change
of −5.0 dB with a tracking change of ±0.2 dB.
Note 12: Adjust input frequency from 10 MHz (AV max reference level) to the −3 dB corner frequency (f−3 dB).
Note 13: Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation. Terminate the undriven amplifier
inputs to simulate generator loading. Repeat test at fIN = 10 MHz for VSEP 10 MHz.
Note 14: A minimum pulse width of 200 ns is guaranteed for a horizontal line of 15 kHz. This limit is guaranteed by design. If a lower line rate is used then a longer
clamp pulse may be required.
www.national.com
3


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