Video amplifiers

News

Texas Instruments has introduced three integrated high-performance video amplifiers.

The new three-channel devices are claimed to be 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.

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, according to TI. For example, total quiescent current at 3.3 V for the THS7353 is 16.2 mA and total power is 54 mW.

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 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.