100V OPamp, High Voltage Op Amp for Analog ASICs

80V High Voltage
Operational Amplifier


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For the application in custom specific ICs this new high voltage operational amplifier OP601VHV has been designed for supply voltages of up to ±40V or up to 80V single supply.
The common mode input voltage covers nearly the complete supply voltage range with a very good common mode and power supply rejection ratio of more than 110dB. The output voltage can approximate the positive or negative supply voltage as close as 1V. The temperature increase of the component remains small in spite of the high voltages due to the low quiescent current of only 1.4 mA.

Fast control circuits may be designed with this OP601VHV due to the high gain bandwidth product and a slew rate of typical 1V/µs.

The new high voltage operational amplifier OP601VHV has been developed and produced with the enhanced semiconductor process ModuS U6 by the ASIC specialist PREMA Semiconductor.
The OP601VHV can be used e.g. in a motor control circuit with current sensing using a shunt resistor at high potential. The wide common mode input range allows high impedance measurements of small differential voltages at high potentials, e.g. in Wheatstone bridges. Actors using higher voltages can be driven directly by the ASIC.

For the design of high voltage ASICs, PREMA offers linear regulators, step-down converters and several output drivers. Several externally connected components can be saved because high voltage transistors and resistors can be integrated now into the ASIC.