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OPA2211A BiCom3 Process Technology

Other Parts Discussed in Thread: OPA2211A, OPA828

Hi Team,

Good day.

OPA2211A device is using BiCom3-HV process technology. According to the document on the link below,
SiGe HBTs usually have a low breakdown voltage ~5V. Why does  BiCom3-HV work up to 36V ?
Also, Does it have MOSFETs or Si BJTs inside?

Thanks in advance!


  • Hi Art,

    not the voltage is destroying a structure but the field strength. According to U = E x d increasing the thickness of structure will make it withstand higher voltages.


  • Thanks Kai for looking into this!


  • Art,

    The OPA2211A uses a high voltage process variation on the BiCom3 SiGe process called BiCom3xHV. It provides much higher voltage breakdown than is achieved with the low voltage process. The HV transistors have different ranges for their electrical parameters than their low voltage counterparts as would be expected.

    The BiCom3xHV process does not have MOSFETs, but does support JFETs. The OPA828 is an example of precision op amp having JFET inputs and is fabricated on the HV process.

    Regards, Thomas

    Precision Amplifiers Applications Engineering