Ultrasound drivers deliver deeper body tissue imaging capability

Sunnyville, Calif. — These medical ultrasound drivers from Supertex, Inc. are said to enable efficient switching, clearer images and faster frame rates.

The HV219 is a low switch resistance, low charge injection, 8-channel, high-voltage analog switch IC that is suited for use in medical ultrasound imaging applications. The IC utilizes high-voltage bilateral DMOS switches and low power CMOS logic to provide efficient control of high voltage signals, up to 200 V. In medical ultrasound applications, this allows for higher transmitting voltages that provide deeper body tissue imaging, said Ahmed Masood, Supertex's director of marketing.

Other features of this device include low charge injection to obtain clearer images and a
faster frame rate, 11Ω switch resistance that minimizes return signal attenuation and CMOS serial shift register logic control that minimizes I/O connections and power dissipation.

Additionally, the company released the 16-channel HV238TA (see block diagram below) in a space-saving TAPP
package. The IC features integrated bleed resistors on the outputs that discharge residual DC voltages and reduce erroneous signals in medical ultrasound and nondestructive evaluation applications, Masood said.

The HV219 is available in a 48-lead TQFP package (HV219FG) and a 28-lead plastic
package (HV219PJ). The HV238TA is available in a 44-lead package.

Pricing is $21.19 each for the HV219FG, $19.07 for the HV219PJ and $21.00 for the HV238TA in 1,000-piece quantities. Click here for the HV219 data sheet.

Click here for the HV238 data sheet.

Supertex Inc. , 1-408-222-8888,

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