Datasheet
LMH1251
SNLS193J –AUGUST 2005–REVISED MARCH 2013
www.ti.com
Video Signal Electrical Characteristics
Unless otherwise noted: T
A
= 25°C, V
CC
= +5.0V, RGB Video
IN
= 0.7 V
PP
, Y Video
IN
= 0.7 V
PP
, P
B
P
R
Video
IN
= ±350 mV,
C
L
= 8 pF, Video Outputs = 0.7 V
PP
.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
I
S, RGB
Supply Current No Output Loading, 80 kHz 28 34 41 mA
I
S
, YP
B
P
R
Supply Current No Output Loading, 480p 60 70 80 mA
see
(3)
I
S-PS
Supply Current, Power Save Mode Power Save Mode, No Output 4 8 12 mA
Loading, 80 kHz, see
(3)
I
OUT
Output Current 3 mA
V
O BLK
Typical DC Active Video Black Level 1.8 2.1 2.4 VDC
Output Voltage
Gain
RGB
RGB Video Unity Gain RGB Video
IN
= 0.7 V
PP
0.07 dB
Ch-Ch Match
RGB
RGB Ch to Ch Matching RGB Video
IN
= 0.7 V
PP
0.02 dB
LE
RGB
RGB Input: Linearity Error Staircase Input Signal 0 %
see
(4)
Video Time Domain Response
RGB t
r
RGB Input: 10% to 90%, AC Input Signal
(5)
1.55 ns
Video Rise Time
RGB OS
R
RGB Input: AC Input Signal
(5)
3 %
Rising Edge Overshoot
RGB t
f
RGB Input: 90% to 10%, AC Input Signal
(5)
1.55 ns
Video Fall Time
RGB OS
F
RGB Input: AC Input Signal
(5)
3 %
Rising Edge Overshoot
SD YP
B
P
R
t
r
SD YP
B
P
R
Input: 10% to 90%, AC Input Signal
(5)
1.54 ns
Video Rise Time
RGB OSF RGB Input:
(5)
, AC Input Signal 3 %
Falling Edge Overshoot
SD YP
B
P
R
t
r
SD YP
B
P
R
Input: 10% to 90%, AC Input Signal
(5)
15.4 ns
Video Rise Time
SD YP
B
P
R
OS
R
SD YP
B
P
R
Input: AC Input Signal
(5)
3 %
Rising Edge Overshoot
SD YP
B
P
R
t
f
SD YP
B
P
R
: 90% to 10%, AC Input Signal
(5)
15.4 ns
Video Fall Time
SD YP
B
P
R
OS
F
SD YP
B
P
R
: AC Input Signal
(5)
3 %
Falling Edge Overshoot
HD YP
B
P
R
t
r
HD YP
B
P
R
Input: 10% to 90%, AC Input Signal
(5)
8.4 ns
Video Rise Time
HD YP
B
P
R
OS
R
HD YP
B
P
R
Input: AC Input Signal
(5)
3 %
Rising Edge Overshoot
HD YP
B
P
R
t
f
HD YP
B
P
R
: 90% to 10%, AC Input Signal
(5)
8.4 ns
Video Fall Time
HD YP
B
P
R
OS
F
HD YP
B
P
R
: AC Input Signal
(5)
3 %
Falling Edge Overshoot
(1) Datasheet 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 values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
(3) The supply current specified is the quiescent current for V
CC
and 5V with R
L
= ∞. Load resistors are not required and are not used in the
test circuit; therefore, all the supply current is used by the device.
(4) Linearity Error is the maximum variation in step height of a 16 step staircase input signal waveform with a 0.7 V
PP
level at the input. All
16 are steps equal, with each at least 100 ns in duration.
(5) Input from RGB signal generator: t
r
, t
f
= 1.5 ns. Input from SDTV YP
B
P
R
signal generator: t
r
, t
f
= 15 ns. Input from HDTV YP
B
P
R
signal
generator: t
r
, t
f
= 8 ns.
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