OPA3875 Series

Triple-channel, 700-MHz, op amp with 2:1 high-speed multiplexer

Catalog

Triple-channel, 700-MHz, op amp with 2:1 high-speed multiplexer

Part	Applications	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case	Package / Case	Supplier Device Package	Voltage - Supply, Single (V+)	-3db Bandwidth	Mounting Type	Number of Channels	Voltage - Supply, Dual (V±) [Max]	Voltage - Supply, Dual (V±) [Min]	Features	Multiplexer/Demultiplexer Circuit	Switch Circuit
Texas Instruments OPA3875IDBQ	Video	85 °C	-40 °C	0.154 in	16-SSOP	3.9 mm	16-SSOP	5 V	425 MHz	Surface Mount	1	5 V	-5 V	Buffered RGB	2:1	SPDT

Catalog

Triple-channel, 700-MHz, op amp with 2:1 high-speed multiplexer

Key Features

• 700MHz SMALL-SIGNAL BANDWIDTH(AV= +2)425MHz, 4VPPBANDWIDTH0.1dB GAIN FLATNESS to 150MHz4ns CHANNEL SWITCHING TIMELOW SWITCHING GLITCH: 40mVPP3100V/µs SLEW RATE0.025%/0.025° DIFFERENTIAL GAIN, PHASEHIGH GAIN ACCURACY: 2.0V/V ±0.4%APPLICATIONSRGB SWITCHINGLCD PROJECTOR INPUT SELECTWORKSTATION GRAPHICSTRIPLE ADC INPUT MUXDROP-IN UPGRADE TO LT1675All other trademarks are the property of their respective owners.700MHz SMALL-SIGNAL BANDWIDTH(AV= +2)425MHz, 4VPPBANDWIDTH0.1dB GAIN FLATNESS to 150MHz4ns CHANNEL SWITCHING TIMELOW SWITCHING GLITCH: 40mVPP3100V/µs SLEW RATE0.025%/0.025° DIFFERENTIAL GAIN, PHASEHIGH GAIN ACCURACY: 2.0V/V ±0.4%APPLICATIONSRGB SWITCHINGLCD PROJECTOR INPUT SELECTWORKSTATION GRAPHICSTRIPLE ADC INPUT MUXDROP-IN UPGRADE TO LT1675All other trademarks are the property of their respective owners.

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 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. 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 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.