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LMH1251 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LMH1251
Description  YPBPR to RGB Decoder and 2:1 Video Switch
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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 4 page
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Video Signal Electrical Characteristics (Continued)
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, RGB VideoIN = 0.70, Y VideoIN = 0.7 VPP,PBPR VideoIN = ±350 VmV,
C
L = 8 pF, Video Outputs = 0.7 VPP. See (Note 7) for Min and Max parameters and (Note 6) for typicals.
Symbol
Parameter
Conditions (Note 2)
Min
Typ
Max
Units
HD YP
BPR tr
HD YP
BPR Input:
Video Rise Time
10% to 90%, AC Input Signal
(Note 5)
8.4
ns
HD YP
BPR OSR
HD YP
BPR Input:
Rising Edge Overshoot
AC Input Signal
(Note 5)
3%
HD YP
BPR tf
HD YP
BPR:
Video Fall Time
90% to 10%, AC Input Signal
(Note 5)
8.4
ns
HD YP
BPR OSF
HD YP
BPR:
Falling Edge Overshoot
AC Input Signal
(Note 5)
3%
Video Frequency Domain Response
RGB BW
RGB Input:
Channel Bandwidth (−3 dB)
Large Signal BW
400
MHz
YP
BPR BW
YP
BPR Input (SD & HD):
Channel Bandwidth (−3 dB)
Large Signal BW
70
MHz
V
SEP Ch-Ch
10 MHz
Video Amplifier 10 MHz Isolation
Channel to Channel
(Note 12)
−50
dB
V
SEP
INPUT-INPUT
10 MHz
Video Amplifier 10 MHz Isolation
RGB Input to YP
BPR Input
(Note 12)
−55
dB
SNR
Signal to Noise Ratio
AC Input Signal, C
L =8pF
(Note 12)
55
dB
Color Decoding Accuracy Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, Y VideoIN = 0.7 VPP,PBPR
Video
IN = ±350 VmV, CL = 8 pF, Video Outputs = 0.7 VPP. See (Note 7) for Min and Max parameters and (Note 6) for typi-
cals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
COLOR ERROR
|P
BPR| Amplitude
(Calculated from RGB Outputs)
YP
BPR Video Input,
100% Color Bar (any 3 colors),
(Note 13)
±0.3
±2.5
%
θ
COLOR ERROR
P
BPR Phase Angle Calculated
from RGB Outputs)
YP
BPR Video Input,
100% Color Bar (any 3 colors),
(Note 13)
±0.2
±1.5
deg
Sync Signal Electrical Characteristics
Unless otherwise noted: T
A = 25˚C, VCC = +5.0V, Y VideoIN = 0.7 VPP,PBPR VideoIN = ±350 VmV, CL = 8 pF,
Video Outputs = 0.7 V
PP. See (Note 7) for Min and Max parameters and (Note 6) for typicals.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
SYNCL
H & V SYNC Low Input
Pins1&2
−0.5
1.5
V
V
SYNCH
H & V SYNC High Input
Pins1&2
3.0
V
CC
+0.5
V
I
O-SYNCH
H & V SYNC Current
Sink/Source Capability
5k
Ω Load
3
mA
t
R/F-SYNC
H & V SYNC Rise/Fall Time
15
ns
t
SYNC-WIDTH
H & V SYNC Width Error
Relative toH&V SYNC Input
H & V SYNC Input
5
%
t
Y-SYNC-WIDTH
H & V SYNC Width Error
Relative to Composite SYNCS
on Y
Composite SYNC on Y Input
5
%
t
SYNC-DELAY
50% ofH&V SYNC Input to
Output
H & V SYNC Input
40
ns
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