OPA3875 Datasheet, PDF (1/22 Pages) Burr-Brown (TI) – Triple 2:1 High-Speed Video Multiplexer

BurrĆBrown Products
from Texas Instruments
OPA3875
SBOS341B – DECEMBER 2006 – REVISED DECEMBER 2006
Triple 2:1 High-Speed Video Multiplexer
FEATURES
• 700MHz SMALL-SIGNAL BANDWIDTH
(A_V = +2)
• 425MHz, 4V_PP BANDWIDTH
• 0.1dB GAIN FLATNESS to 150MHz
• 4ns CHANNEL SWITCHING TIME
• LOW SWITCHING GLITCH: 40mV_PP
• 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
75W
75W
RGB
Channel 0
75W
75W
OPA3875
75W
(Patented)
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 (4V_PP). 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