Other Parts Discussed in Thread: OPA211, OPA828, OPA202, OPA207, OPA145, OPA140
I want to do some test on the amplifier in cryogenic temperatures. I am wondering if it is made by SiGe HBTs only? SiGe HBTs can work in cryogenic temperatures, and Si BJTs or CMOS cannot work in cryogenic temperatures. It would be great if this amplifier is made by SiGe HBTs only.
Also, in the functional block diagram, there are some PNP transistors. Are they SiGe PNP? I heard that SiGe PNP does not work well. What is the performance/properties of your SiGe PNP? Do you have a datasheet?