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Texas Instruments (TI) today announced a series of flexible three-channel integrated video buffers optimized for consumer video applications to meet their high performance, space savings and lower system cost requirements. The family supports HDTV, SDTV and a variety of digital media processors such as the TI DaVinci processor. This amplifier uses a fifth-order Butterworth filter that can be used as a digital-to-analog converter (DAC) reconstruction filter for the encoder. These devices improve video quality in a variety of consumer applications, such as set-top boxes, USB-powered video, portable video recorders, and other video applications, by providing video buffering by rejecting DAC images.
The THS7314, THS7315 and THS7316 offer greater design flexibility as the inputs can be configured for AC or DC coupled applications. In addition, unlike typical solutions, the product family supports single-supply from 3V to 5V, eliminating the need for a separate 5V supply. The rail-to-rail outputs of these devices support AC or DC coupling, so designers can use a 3.3V supply without worrying about space reservations. Since each channel can drive two video lines or a 75 ohm load, maximum flexibility is achieved as a video line driver.
Each device meets the requirements of current video standards. These amplifiers feature an output stage conversion technique that supports the fully synchronized dynamic range of the output at 0V input. The AC-coupled mode includes a transparent sync-tip clamp option and a bottom-level sync for CVBS, Y', and G'B'R' signals. The AC coupling bias of the C'/P'b/P'r channel is also easy to implement, just add an external resistor to the Vs+ (voltage supply pin).
The THS7314 and THS7315 are ideal for SDTV and support CVBS, S-Video, Y'U'V and Y'P'bP'r 480i/576i. The THS7314's typical output gain is 6dB, while the THS7315's fixed gain is 14.3db, enabling better interoperability with TI's DaVinci and OMAPTM processors. The THS7316 supports Y'P'bP'r 720p/1080i/maximum 1080p30 and G'B'R' (R'G'B') standards to meet HDTV requirements with an output gain of 6dB.
The THS7314, THS7315 and THS7316 are available now in a RoHS-compliant, 8-lead SOIC lead-free green package. In addition, we also provide samples and evaluation boards (EVM).
The THS7314, THS7315, and THS7316 further expand TI's broad portfolio of high-speed amplifiers to meet the requirements of analog-to-digital drivers and high-speed signal chains in video, medical, and communications applications. In addition to sample and EVM, TI offers a range of tools including TINA-TITM SPICE simulation tools to make it easier to design with TI's high-speed amplifiers.