Highly Integrated, Dual Digital Pulsers Utilize Active Clamping to Enhance Ultrasound Imaging

Highly Integrated, Dual Digital Pulsers Utilize Active Clamping to Enhance Ultrasound Imaging

Maxim introduces the MAX4810/MAX4811/MAX4812* dual, high-voltage digital pulsers, ideal for applications, such as portable ultrasound imaging and industrial flaw detection .

Maxim Integrated introduces the MAX4810/MAX4811/MAX4812* dual, high-voltage digital pulsers. Providing a guaranteed 1.3A (min) output current, these devices can be independently configured to enable unipolar or bipolar pulsing in high-voltage systems from low-voltage logic inputs. Three logic inputs per channel and two independent enable inputs ensure that the output MOSFETs are turned off to speed ramp times and minimize delays between pulsing modes. To improve image quality, these pulsers employ an innovative, active-clamping architecture to reduce the 2nd harmonic output and allow complete control of each driver's output stage. The MAX4810/MAX4811/MAX4812 are ideal for applications, such as portable ultrasound imaging and industrial flaw detection, in which board space and performance are critical.

The MAX4810/MAX4811/MAX4812 operate from a single positive supply up to +220V, a single negative supply down to -200V, or dual ±110V supplies. The MAX4810 features clamp-output overvoltage protection, the MAX4811 has pulser- and clamp-output overvoltage protection, and the MAX4812 offers pulsing without overvoltage protection. Fully specified over the 0°C to +70°C commercial temperature range, each device is available in a small, 7mm x 7mm, 56-pin TQFN package.