THS7303

具有 I2C 控制、选通滤波、+6db 增益 和 2:1 输入 MUX 的 3 通道低功耗视频放大器

Fabricated using the new complementary silicon-germanium SiGe BiCom-3 process, the is a low-power, single-supply, 2.7-V to 5-V, 3-channel integrated video buffer. It incorporates a selectable fifth-order Butterworth filter to eliminate data converter images. The 9-MHz filter is a perfect choice for SDTV video including composite CVBS, S-Video, and 480i/576i Y"P"BP"R, and G"B"R" R"G"B" signals. The 16-MHz filter is ideal for EDTV 480p/576p Y"P"BP"R, G"B"R", and VGA signals. The 35-MHz filter is useful for HDTV 720p/1080i Y"P"BP"R, G"B"R", and SVGA/XGA signals. For 1080p or SXGA/UXGA signals, the filter can be bypassed allowing a 190-MHz bandwidth, 300-V/µs amplifier to buffer the signal.

Each channel of the THS7303 is individually I2C configurable for all functions which makes it flexible for any application. Its rail-to-rail output stage allows for both ac and dc coupling applications. The 6-dB gain along with the built-in SAG correction allows for maximum flexibility as an output video buffer.

The 16.6-mA total quiescent current 55 mW total power makes the THS7303 an excellent choice for USB powered or portable video applications. While fully disabled, the THS7303 consumes less than 1 µA making it ideal for energy sensitive applications.

As part of the THS7303 flexibility, the 2:1 MUX input can be selected for ac- or dc-coupled inputs. The ac-coupled modes include a sync-tip-clamp option for CVBS/Y"/G"/B"/R" with sync or a fixed bias for the C"/P"B/P"R non-sync channels. The dc input options include a dc input or a dc + 135-mV input offset shift to allow for a full sync dynamic range at the output with 0-V input.

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3-Video Amplifiers for CVBS, S-Video, Y"U"V", SD/ED/HD Y"P"BP"R, and G"B"R" R"G"B"

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I2C™ Control of All Functions

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Integrated Low-Pass Filters

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5th-Order Butterworth Characteristics

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Selectable Corner Frequencies of 9-MHz, 16-MHz, 35-MHz, and Bypass 190-MHz

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Selectable Input Bias Modes

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AC-Coupled with Sync-Tip-Clamp

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AC-Coupled with Bias

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DC-Coupled with 135-mV Input Shift

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DC-Coupled

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2:1 Input MUX Allows Multiple Input Sources

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Built-in 6-dB Gain 2 V/V

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SAG Correction Capable

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2.7-V to 5-V Single Supply Operation

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Low 16.6-mA 3.3 V Total Quiscent Current

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Individual Disable < 1 µA and Mute Control

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Rail-to-Rail Output:

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Output Swings within 100 mV from the Rails to Allow AC or DC Output Coupling

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Supports Driving Two Lines per Channel

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Low Differential Gain/Phase of 0.13%/0.55°

* APPLICAONS

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Set Top Box Output Video Buffering

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PVR/DVDR Output Buffering

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USB/Portable Low Power Video Buffering

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