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OPA462: Series connection circuit

Hiroaki Yuyama TED
Expert 1730 points
Part Number: OPA462
Other Parts Discussed in Thread: OPA596

Tool/software:

Dear OP-AMP Support Team,

For example, is it possible to double the output amplitude by connecting a high-voltage op amp such as the OPA462 in series?

An example of a current amplification circuit with an output connected in parallel is provided.
I am considering whether it is possible to create a 300V 400kHz or 800kHz MEMS driver circuit using an op amp.

Best Regards,
Hiroaki Yuyama
  • 0
    TI__Guru* 77331 points

    Hi Hiroaki-san,

    Hiroaki Yuyama TED said:
    is it possible to double the output amplitude by connecting a high-voltage op amp such as the OPA462 in series?

    It is not clear how you are going to connect OPA462 in series to double the voltage. 

    Hiroaki Yuyama TED said:
    I am considering whether it is possible to create a 300V 400kHz or 800kHz MEMS driver circuit using an op amp.

    To double the op amp's driving voltage, you may do in the following two topologies. 

    1.  configure op amp in bootstrap supply‐rail driver technique

    https://www.ti.com/lit/an/sboa510/sboa510.pdf

    2. the following method is using push-pull driving topology to double the output voltage swing. In this example, I create the MEMS/PZT driver with OPA596. You need to configure your application with OPA462 instead. 

    PZT 100Vpp Driver OPA596 09122025.TSC

    If you have other questions, please let us know. 

    Best,

    Raymond