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PDF OPA3875 Data sheet ( Hoja de datos )
| Número de pieza | OPA3875 | |
| Descripción | Single 2:1 High-Speed Video Multiplexer | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA3875 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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BurrĆBrown Products
from Texas Instruments
OPA3875
SBOS341B – DECEMBER 2006 – REVISED DECEMBER 2006
Triple 2:1 High-Speed Video Multiplexer
FEATURES
• 700MHz SMALL-SIGNAL BANDWIDTH
(AV = +2)
• 425MHz, 4VPP BANDWIDTH
• 0.1dB GAIN FLATNESS to 150MHz
• 4ns CHANNEL SWITCHING TIME
• LOW SWITCHING GLITCH: 40mVPP
• 3100V/µs SLEW RATE
• 0.025%/0.025° DIFFERENTIAL GAIN, PHASE
• HIGH GAIN ACCURACY: 2.0V/V ±0.4%
APPLICATIONS
• RGB SWITCHING
• LCD PROJECTOR INPUT SELECT
• WORKSTATION GRAPHICS
• TRIPLE ADC INPUT MUX
• DROP-IN UPGRADE TO LT1675
+5V
RGB
Channel 0
75W
75W
75W
OPA3875
(Patented)
75W
75W
RGB
Out
DESCRIPTION
The OPA3875 offers a very wideband, 3-channel, 2:1
multiplexer in a small SSOP-16 package. Using only
11mA/ch, the OPA3875 provides three, gain of +2,
video amplifier channels with > 400MHz large-signal
bandwidth (4VPP). Gain accuracy and switching glitch
are improved over earlier solutions using a new
(patented) input stage switching approach. This
technique uses current steering as the input switch
while maintaining an overall closed-loop design. Gain
matching between each of the 3-channel pairs is
also significantly improved using this technique
(<0.2% gain mismatch). With >700MHz small-signal
bandwidth at a gain of 2, the OPA3875 gives a
typical 0.1dB gain flatness to > 150MHz.
System power may be reduced using the chip enable
feature for the OPA3875. Taking the chip enable line
high powers down the OPA3875 to <900µA total
supply current. Muxing multiple OPA3875 outputs
together, then using the chip enable to select which
channels are active, increases the number of
possible inputs to the 3-channel outputs.
Where a single channel of the OPA3875 is required,
consider the OPA875.
SELECT
1
0
X
OPA3875
ENABLE RED OUT GREEN OUT
0 R0
G0
0 R1
G1
1 Off
Off
BLUE OUT
B0
B1
Off
RGB
Channel 1
75W
75W
75W
75W
-5V EN
Channel
Select
RGB Switching
OPA3875 RELATED PRODUCTS
OPA875
OPA4872
OPA3693
DESCRIPTION
Single-Channel OPA3875
Quad 510MHz 4:1 Multiplexer
Triple 650MHz Video Buffer
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
1 page  
OPA3875
www.ti.com
SBOS341B – DECEMBER 2006 – REVISED DECEMBER 2006
TYPICAL CHARACTERISTICS: VS = ±5V
At G = +2 and RL = 150Ω, unless otherwise noted.
SMALL-SIGNAL FREQUENCY RESPONSE
7
Frequency Response
6 Left Scale
0.3
0.2
1 0.1
4
Gain Flatness
3 Right Scale
2
1
VO = 500mVPP
RL = 150W
G = +2V/V
0
1M 10M
100M
Frequency (Hz)
Figure 1.
0
-0.1
-0.2
-0.3
-0.4
1G
8
7
6
5
4
3
2
1
0
-1
-2
-3
0
LARGE-SIGNAL FREQUENCY RESPONSE
RL = 150W
G = +2V/V
VO = 4VPP
VO = 5VPP
VO = 1VPP
VO = 2VPP
100 200 300 400 500 600 700 800 900 1000
Frequency (100MHz/div)
Figure 2.
NONINVERTING PULSE RESPONSE
0.5
0.4
RL = 150W
G = +2V/V
0.3
0.2
0.1
0
Large-Signal 4VPP
Right Scale
Small-Signal 0.4VPP
Left Scale
-0.1
-0.2
-0.3
-0.4
100MHz Square-Wave Input
-0.5
Time (1ns/div)
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
Figure 3.
ALL INPUT DISABLE FEEDTHROUGH vs FREQUENCY
-20
Input-Referred
-30 EN = +5V
-40
-50
-60
-70
-80
-90
-100
-110
1M
10M 100M
Frequency (Hz)
1G
Figure 4.
RECOMMENDED RS vs CAPACITIVE LOAD
80
70
60
50
40
30
20
10
0
1 10 100 1000
Capacitive Load (pF)
Figure 5.
FREQUENCY RESPONSE vs CAPACITIVE LOAD
8
7 0.1dB Peaking Targeted
6
CL = 10pF
5
4
3
2 CL = 47pF
1
0
-1
-2
-3
1
75W
75W
RS
x2
CL
CL = 100pF
1kW(1)
NOTE: (1) 1kW is optional.
CL = 22pF
10 100
400
Frequency (MHz)
Figure 6.
Submit Documentation Feedback
5
5 Page 
www.ti.com
RIN
92W
GIN
92W
BIN
92W
300W
VREF
300W
VREF
300W
VREF
300W
1/3
OPA3693
300W
1/3
OPA3693
300W
1/3
OPA3693
VREF = 0.749V
OPA3875
SBOS341B – DECEMBER 2006 – REVISED DECEMBER 2006
+5V
OPA3875
x1
75W
ROUT
402W
x1
402W
x1
75W
GOUT
402W
x1 402W
75W
BOUT
402W
x1
402W
x1
Channel
Select
-5V EN
Figure 27. RGB Video Inverter
Submit Documentation Feedback
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet OPA3875.PDF ] | |
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