TI Target Portable Ultrasound, Instrumentation with High-Speed ADCs

6/26/2003 - Extending its family of the industry´s only high-speed, eight-channel analog-to-digital converters (ADCs), Texas Instruments (TI) Incorporated (NYSE: TXN) announced two new 10-bit, octal ADCs that provide simultaneous conversion of up to eight differential analog signals at 40 and 65 mega samples per second (MSPS). Offering the lowest power per channel of any high-speed, 10-bit ADC currently on the market, these data converters provide the speed, resolution and low power required in multi-channel applications such as portable ultrasound and portable instrumentation.

"By integrating eight low-power, high-speed ADCs into a single package, designers of portable systems will benefit from a significant reduction in board space, lower power requirements, shorter development time and reduced system costs," said Ed Fullman, product marketing manager for TI's high-speed data converter products.

The ADS5121 (40MSPS, 360mW ADC power dissipation) and ADS5122 (65MSPS, 522mW ADC power dissipation) guarantee no missing codes and feature an exceptional signal-to-noise ratio (SNR) of 60dB and 59db, respectively. The devices drastically reduce per-channel space to just 32 square millimeters (mm2), saving up to 60 percent of the board space required by competitive solutions. Using these data converters, designers will be able to build more features into smaller, more affordable systems with longer battery life - enabling advanced diagnostics in a broader range of environments around the world.

Both devices operate from a single 1.8V supply, while offering 1.8V and 3.3V digital I/O flexibility. All eight channels share a common clock for simultaneous sampling and feature individual standby pins which allow the user to power-down any number of ADCs for additional power savings. A peak-to-peak differential input range of 1V maintains signal integrity, and a common internal or external voltage reference allows matching between channels.

Available Today
The ADS5121 and ADS5122 are both packaged in TI´s 257-lead plastic MicroStarTM ball grid array (BGA), allowing a sample rate upgrade from 40MSPS to 65MSPS. The ADS5121 is priced from $37.00 in 1,000 piece quantities (suggested resale pricing). The ADS5122 is priced from $40.80 in 1,000 piece quantities (suggested resale pricing).

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