MD0100

MD0100 Single/Dual-Channel High-Voltage Protection T/R Switch Features Up to ±100V Input Voltage Protection Low On-Resistance, 15Ω Typical Fast-Switching Speed Effective Simple Two-Terminal Device No External Supplies Needed Applications Medical Ultrasound Imaging Non-Destructive Testing Applications Fast Resettable Fuses High-Side Switches Data Acquisition General Description The MD0100 is a high-voltage, two-terminal, bi-directional, current-limiting protection device. The two terminals are interchangeable. It is designed to protect a low-noise receiver from high-voltage transmit pulses in ultrasound applications and is commonly referred to as a transmit-and-receive (T/R) switch. The MD0100 can be considered as a normally closed switch with a typical switch resistance of 15Ω that allows small signals to pass. When the voltage drop across the two terminals exceeds a nominal value of ±2V, the device turns off. In the OFF state, the MD0100 can withstand up to ±100V across its terminals. A small amount of current (typically 200 µA) is allowed to flow through. The applications for the MD0100 are not limited to just ultrasound. It can also be used as resettable fuses to protect power lines, output short-circuit protection and data acquisition. The MD0100 is available in an SOT-89 package as a single-channel device, as well as in a 4 mm x 4 mm 8-lead DFN package as a dual-channel device. Package Types 3-lead SOT-89 (Top view) COM A COM B 8-lead DFN (Top...