LMH1251MT-NOPB Datasheet, PDF (5/19 Pages) Texas Instruments – YPBPR Path: 70 MHz, −3 dB, 700 mVPP Bandwidth

LMH1251
www.ti.com
SNLS193J – AUGUST 2005 – REVISED MARCH 2013
Video Signal Electrical Characteristics (continued)
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_BP_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
Video Frequency Domain Response
RGB BW
RGB Input:
Channel Bandwidth (−3 dB)
Large Signal BW
400
MHz
YP_BP_R BW
V_{SEP Ch-Ch}
10 MHz
V_{SEP INPUT-INPUT}
10 MHz
SNR
YP_BP_R Input (SD & HD):
Channel Bandwidth (−3 dB)
Video Amplifier 10 MHz Isolation
RGB Channel to Channel
Video Amplifier 10 MHz Isolation
RGB Input to YP_BP_R Input
Signal to Noise Ratio
Large Signal BW
(6)
(6)
AC Input Signal, C_L = 8 pF ⁽⁶⁾
70
MHz
−50
dB
−55
dB
55
dB
(6) 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 f_IN = 10 MHz for V_SEP 10 MHz.
Color Conversion Accuracy
Unless otherwise noted: T_A = 25°C, V_CC = +5.0V, Y Video_IN = 0.7 V_PP, P_BP_R Video_IN = ±350 mV, C_L = 8 pF,
Video Outputs = 0.7 V_PP.
Symbol
Parameter
Conditions
Min ⁽¹⁾ Typ ⁽²⁾
V_{COLOR ERROR}
|P_BP_R| Amplitude
(Calculated from RGB Outputs)
YP_BP_R Video Input,
100% Color Bar (any 3 colors), ⁽³⁾
±0.3
θ_{COLOR ERROR}
P_BP_R Phase Angle
(Calculated from RGB Outputs)
YP_BP_R Video Input,
100% Color Bar (any 3 colors), ⁽³⁾
±0.2
Max ⁽¹⁾
±2.5
±1.5
Units
%
deg
(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) Any three color bar signals can be used as test signals. The RGB outputs shall be used to calculate the amplitudes and phases of the
chroma results. These should fall within the limits specified.
Sync Signal Electrical Characteristics
Unless otherwise noted: T_A = 25°C, V_CC = +5.0V, Y Video_IN = 0.7 V_PP, P_BP_R Video_IN = ±350 mV, C_L = 8 pF,
Video Outputs = 0.7 V_PP.
Symbol
Parameter
Conditions
Min ⁽¹⁾ Typ ⁽²⁾ Max ⁽¹⁾
V_SYNCL
V_SYNCH
I_O-SYNCH
H & V SYNC Low Input
H & V SYNC High Input
H & V SYNC Current Sink/Source
Capability
Pins 1 & 2
Pins 1 & 2
5 kΩ Load
−0.5
3.0
1.5
V_CC +0.5
3
t_R/F-SYNC
H & V SYNC Rise/Fall Time
15
t_SYNC-WIDTH
H & V SYNC Width Error Relative to H & V SYNC Input
5
H & V SYNC Input
t_Y-SYNC-WIDTH
H & V SYNC Width Error Relative to Composite SYNC on Y Input
5
Composite SYNCS on Y
t_SYNC-DELAY
50% of H & V SYNC Input to Output H & V SYNC Input
40
t_{Y-HSYNC-DELAY}
50% of H SYNC Input to Output
Composite SYNC on Y Input (Not
70
During Vertical Period)
Units
V
V
mA
ns
%
%
ns
ns
(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.
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