THS7313

使用 I2C 控制 +6dB 增益 SAG 修正 2:1 MUX 的 3 通道低功耗 SDTV 视频放大器

Fabricated using the new complimentary silicon-germanium SiGe BiCom-III process, the is a low-power, single-supply 2.7-V to 5-V, 3-channel integrated video buffer. It incorporates a 5th order Butterworth filter which is useful as a digital-to-analog converter DAC reconstruction filter or an analog-to-digital converter ADC anti-aliasing filter. The 8-MHz filter is a perfect choice for SDTV video which includes composite CVBS, S-Video, Y"U"V", G"B"R", and Y"P"BP"R 480i/576i.

Each channel of the THS7313 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 at 3.3 V 55 mW makes it an excellent choice for USB powered or portable video applications. While fully disabled, the THS7313 consumes less than 1 µA.

The THS7313 is available in a small lead-free and RoHS compliant TSSOP-20 package.

As part of the THS7313 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 or Y" signals, or a fixed bias for the C/P"B/P"R 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 SDTV Video Amplifiers for CVBS, S-Video, Y"P"BP"R 480i/576i, or G"B"R" Video Systems

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I2C™ Control of All Functions on Each Channel

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Integrated Low-Pass Filters

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5th Order, 8-MHz Butterworth 0.5-dB Attenuation at 5.5 MHz 48-dB Attenuation at 27 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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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 Which Allows AC or DC Output Coupling

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Able to Drive up to 2 Video Lines - 75

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Low 16.6-mA 3.3 V Total Quiescent Current

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Low Differential Gain/Phase of 0.07% / 0.12°

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APPLICA ONS

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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

I2C is a trademark of Philips Electronics.