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TI Introduces Family Of Programmable Analog Video Signal Processors Filters With I2c, Integrated Filters And 3.3-V Operation


DALLAS (Dec. 15, 2005) - Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced three integrated high-performance video amplifiers. These new three-channel devices are the first to offer full I2C programmability of all functions independently for each channel, which provides the designer the flexibility to configure a video system as required or on-the-fly, without the need for hardware upgrades or modifications. The devices are designed with integrated Butterworth filters to provide all the analog signal conditioning required in video applications such as set-top boxes, digital televisions, personal video recorders/DVD readers and portable USB devices. (See

Key Features of the THS73x3 Family

Manufactured in TIís proprietary BiCom3 complementary bipolar silicon germanium process, the THS7303, THS7313 and THS7353 feature 2.7 V to 5 V single-supply operation and are as much as 20x lower power than competing amplifiers. For example, total quiescent current at 3.3 V for the THS7353 is 16.2 mA and total power is 54 mW. This reduces system thermal issues, increases long-term reliability and provides a key benefit for customers designing environmentally-friendly products. In addition, the devices share the following key features:

* 2:1 input MUX
* Integrated 5th order low pass filters with Butterworth characteristics, which strikes a balance between group delay and attenuation
* Selectable input bias modes and rail-to-rail outputs to allow for a variety of AC and DC coupled modes
* Individual channel disable and independent channel mute control
* When all channels are disabled, the current is 0.1 uA

The THS7303 and THS7313 are video line driver output devices configured in a gain of 6 dB with SAG correction, and they are capable of driving up to two doubly-terminated 75 ohms video lines. The THS7303 integrates I2C-programmable 9-, 16- and 35-MHz digital-to-analog converter (DAC) reconstruction filters for standard-definition digital television (SDTV), enhanced-definition television (EDTV) and high-definition television (HDTV), and a 190-MHz filter bypass mode for 1080p or SXGA/UXGA video standards. The THS7313 includes a fixed 9-MHz filter for SDTV.

The THS7353 is a video input device containing analog-to-digital converter (ADC) anti-aliasing filter modes selectable at 9-, 16-, and 35-MHz along with a 150-MHz bypass mode. The THS7353 unity gain amplifier can be configured with external resistors for gains up to 14dB to allow compensation of skin effect losses on cables or SinX/X DAC compensation.

The THS73x3 devices join TIís extensive offering of high-performance analog and digital signal processor (DSP) products for video applications, including DaVinciTM products optimized for digital video systems. TI provides the silicon, software, systems expertise and support for customersí video designs, enabling them to get to market quickly. For more information on TIís video and imaging products, see the Video Solutions Guide at

Pricing and Availability

The THS7303/13/53 video amplifiers are available now in a 20-pin, Lead (Pb)-Free and Green thin shrink small outline package (TSSOP) from TI and its authorized distributors. Suggested resale pricing in quantities of 1,000 is $1.65 for the THS7303 and THS7353, and $1.20 for the THS7313. Samples and evaluation modules (EVM) are available for 24-hour delivery.


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