1FEATURES
2· 700MHz SMALL-SIGNAL BANDWIDTH
(AV = +2)
· 425MHz, 4VPP BANDWIDTH
· 0.1dB GAIN FLATNESS to 200MHz
· 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
· ADC INPUT MUX
· DROP-IN UPGRADE TO LT1675-1

DESCRIPTION
The OPA875 offers a very wideband, single-channel
2:1 multiplexer in an SO-8 or a small MSOP-8
package. Using only 11mA, the OPA875 provides a
gain of +2 video amplifier channel with greater than 425MHz large-signal bandwidth (4VPP). Gain
accuracy and switching glitch are improved over
earlier solutions using a new input stage switching
approach. This technique uses current steering as the input switch while maintaining an overall closed-loop
design. With greater than 700MHz small-signal
bandwidth at a gain of 2, the OPA875 gives a typical
0.1dB gain flatness to greater than 200MHz.
System power may be reduced using the chip enable
feature for the OPA875. Taking the chip enable line
high powers down the OPA875 to less than 300mA
total supply current. Muxing multiple OPA875 outputs
together, then using the chip enable to select which channels are active, increases the number of possible
inputs.
Where three channels are required, consider using
the OPA3875 for the same level of performance.