Integrated pulser chips target portable ultrasound apps

Sunnyvale, Calif.—Supertex has introduced a pair of four-channel ultrasound pulser ICs that combine logic control circuitry, level translators, MOSFET gate drive buffers and high current, high voltage outputs in one small monolithic package.

The HV738 and HV748 feature built-in output drain bleed resistors for noise reduction, up to 20-MHz operating frequency and matched delay times.

The four HV738 outputs are specified at up to ±65-V and ±750-mA source and sink current each in pulsed-wave (PW) mode.

The HV748's output voltage is specified at ±75-V and output current is specified at ±1.25A source and sink each in PW mode. They also employ a direct coupling topology to facilitate easier board layout.

“The HV738 and the HV748 have controls to enable both pulsed-wave (PW) and continuous-wave (CW) mode operations,” said Ahmed Masood, vice president of marketing for Supertex, in a statement. “These highly integrated, four channel, monolithic pulsers are ideal for space-constrained portable ultrasound imaging systems that require channel density and image resolutions similar to those of larger, stationary systems.”

Both parts are available in 48 lead QFN packages (HV738K6-G and HV748K6-G, respectively). The parts are Green and RoHS compliant.

Pricing: $10.80 each for the HV738K6-G and $11.20 for the HV748K6-G, both in 1K quantities.

Availability: Samples are available from stock. Lead-time for production quantities is four to six weeks ARO.
Datasheets: click here.

Supertex Inc., 1-800-222-9883,

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