1FEATURES
2· 700MHz SMALL-SIGNAL BANDWIDTH
(AV = +2)
· 425MHz, 4VPP BANDWIDTH
· 0.1dB GAIN FLATNESS to 150MHz
· 4ns CHANNEL SWITCHING TIME
· LOW SWITCHING GLITCH: 40mVPP
· 3100V/ms 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

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 greater than 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 greater
than 700MHz small-signal bandwidth at a gain of 2,
the OPA3875 gives a typical 0.1dB gain flatness to greater than 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 less than 900mA
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.