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.