The MSK 165 is an ultra high voltage dual monolithic MOSFET operational amplifier ideally suited for electrostatic transducer and electrostatic deflection applications. With a total supply voltage rating of 350 volts and 60mA of output current available from each amplifier, the MSK 165 is also an excellent low cost choice for high voltage piezo drive circuits. The MOSFET output frees the MSK 165 from secondary breakdown limitations and power dissipation is kept to a minimum with a quiescent current rating of only 4mA total. The MSK 165 is internally compensated for gains of 10 V/V or greater and is packaged in a hermetically sealed 14 pin power dip with heat sink bolt down tabs.