Ultrasound systems can produce clearer images with TI's new family of fully integrated high-voltage pulsers and switches
To support manufacturers developing affordable, compact ultrasound systems, Texas Instruments (TI) today introduced a family of fully integrated high-voltage pulsers and switches
"TI strives to help customers make ultrasound systems more portable and affordable by integrating and optimizing key system components," said Matt Harrison, marketing director of TI's Medical and High Reliability business unit. "With the new TX7xx family of high-voltage pulsers and switches, TI can now provide the most highly integrated signal chain for ultrasound systems, helping ultrasound designers to design better, more compact systems."
Advanced features for better image quality
The TX734 addresses the needs of high-density systems that require a three-level, high-voltage pulse pattern by integrating four channels of level translators, drivers, high-voltage output stage and active damping into a 64-pin, 9 mm x 9 mm QFN package.
Active damping, also called fast clamping to ground, allows for a clean three-level return-to-zero (RTZ) waveform. This improves pulse symmetry and delivers low second order distortion of -40 dB. The active damping feature in the TX734 prevents noise from being injected into the transducer, which improves signal sensitivity by at least 5 dBc, resulting in better image quality.
The output stages of the TX734 are designed to deliver up to +/- 2-A peak output currents, with up to +/-75-V swings, tailored for portable to mid-range systems. The output frequency of the TX734 is up to 15 MHz and allows customers to take full advantage of higher frequency transducers for far-field images.
Complete signal chain offering for ultrasound designers
TI's TX7xx family of high-voltage pulsers and switches, along with the AFE58xx family of analog front end receivers, offers ultrasound designers a complete and highly integrated analog signal chain for better, more compact ultrasound systems. These devices are complemented by more than 15 embedded processors that support medical imaging applications, including high-performance digital signal processors (DSPs), digital media processors based on DaVinci™ technology, and low power OMAP™ application processors. Along with TI's power management products, clocks and interfaces, plus dedicated customer support, they comprise a complete portfolio that ultrasound customers can leverage to design their systems.
Pricing, packaging and availability
The TX734 comes in a 9 mm x 9 mm, 64-pin QFN package at a suggested resale price of $10 each in 1000-unit quantities. Samples will be available in January 2009, with EVMs following in February and volume production scheduled for fourth quarter of 2009.
From: http://ti.com
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