Demo board simplifies ultrasound designs

Dallas&#8212Texas Instruments' signal-chain demonstration kit for ultrasound equipment, the TUS5000 evaluation module (EVM), is designed to evaluate the performance of the company's VCA2615 variable gain amps and the low-voltage differential signal (LVDS) ADS5272 analog-to-digital converter in eight-channel beamforming applications.

The EVM includes a high-performance clock synchronizer and jitter cleaner, the CDCM7005, to provide a 65-MHz clock to the ADS5272. Designers add an ultrasound probe at the input. The EVM also allows customers to analyze the output through their digital beamformer for more complete prototyping.

TI touts its ADS5272 ADC and VCA2615 amplifier as providing best-in-class noise performance at 71.1 dBFS signal-to-noise ratio (SNR) and 0.7 nV/Hz1/2 , respectively, to provide better imaging quality to the end user. With a combined power per channel of 277 mW, the VCA2615 and ADS5272 are suited for portable, midrange, and high-performance ultrasound applications. By using the on-board MSP430 microcontroller, designers can take advantage of the programmability of the VCA2615, making it easier to examine the high performance under a number of ultrasound probe input conditions.

A deserializer design, such as the company's ADSDESER-50EVM, is necessary in order to convert the serial LVDS outputs of the ADS5272 to parallel data for a complete evaluation.

Click here for the TUS5000's user's guide. The TUS5000EVM is priced at $299. The ADSDESER-50EVM is priced at $399.

Texas Instruments , 1-800-477-8924,

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