Supertex inc. MD0100 High Voltage Protection T/R Switch Features General Description Up to 100V input voltage protection The Supertex MD0100 is a high voltage, two terminal, bi- directional, current-limiting protection device. The two terminals Low on resistance - 15 typical are interchangeable. It is designed to protect a low noise receiver Fast switching speed from the high voltage transmit pulses in ultrasound applications Effectively, a simple two terminal device and is commonly referred to as a T/R (transmit and receive) No external supplies needed switch. The MD0100 can be considered as a normally closed switch with Applications a typical switching resistance of 15 that allows small signals to Medical ultrasound imaging pass. Once the voltage drop across the two terminals exceeds NDT applications a nominal value of 2.0V, the device will start to turn off. In the Fast resettable fuses off state, the MD0100 can withstand up to 100V across its High side switches terminals. A small amount of current, typical of 200A, is allowed Data acquisition to flow through. The applications for the MD0100 are not limited to just ultrasound. It can also be used for resettable fuses to protect power lines, output short circuit protection, and data acquisition. The MD0100 is available in the SOT-89 package as a single channel device for ease of assembly. It is also available in a 4.0x4.0mm 8-Lead DFN package as a two channel device for high density requirements. Typical Application Circuit +90V Piezo Transmitter Transducers -90V Logic T X Control and Signal Processing B A MD0100 R X High Voltage T/R Switch Switches Receiver Doc. DSFP-MD0100 Supertex inc. C070113 www.supertex.comMD0100 Ordering Information Pin Configuration Part Number Package Options Packing A1 1 8 COM1 MD0100DK6-G 8-Lead (4x4) DFN 3000/Reel COM1 (Dual Channel) 2 7 COM1 B1 MD0100N8-G 3-Lead TO-243AA (SOT-89) 2000/Reel (Single Channel) 3 6 COM2 A2 -G denotes a lead (Pb)-free / RoHS compliant package COM2 5 COM2 B2 4 1 Absolute Maximum Ratings 8-Lead DFN Parameter Value (top view) (Pads are at bottom of device) V , differential voltage drop 0 to 110V A-B COM Maximum junction temperature +125C Storage temperature range -65C to 150C 2 Power dissipation, 8-Lead DFN 1.1W 2 Power dissipation, SOT-89 1.6W Notes: 1. Absolute Maximum Ratings are those values beyond which damage to the A COM B device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect SOT-89 device reliability. All voltages are referenced to device ground. 2. Mounted on FR4 board, 25mm x 25mm x 1.57mm Product Marking Y = Last Digit of Year Sealed Typical Thermal Resistance 0100 W = Code for Week Sealed Package ja LL = Lot Number YWLL O 8-Lead DFN 44 C/W = Green Packaging O 3-Lead TO-243AA (SOT-89) 133 C/W 8-Lead DFN Package may or may not include the following marks: Si or Y = Last Digit of Year Sealed M10YW W = Code for Week Sealed = Green Packaging SOT-89 Package may or may not include the following marks: Si or Electrical Characteristics (T = 25C, unless otherwise specified) J Sym Parameter Min Typ Max Units Conditions V Max. differential input voltage from A to B 100 - - V I = 500A A-B A-B R Switch ON resistance from A to B - 15 - I = 5.0mA SW A-B V V trip point to turn off - 1.0 2.0 V --- TRIP A-B V Switch turn off voltage - 2.0 - V I = 1.0mA OFF A-B I Switch off current - 200 300 A V = 100V A-B(OFF) A-B I Peak switching current - 60 - mA See Fig. 8 PEAK Doc. DSFP-MD0100 Supertex inc. C070113 2 www.supertex.com