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I am looking for zero crossing OP-amp with positive voltage source. will use the devise for voltage follower. So I appreciate if you could provide several candidate.
BEST REGARDS,
Hironari
Hello Hironari-san.
Zero-crossing implies a comparator that changes output based on input polarity. In other words, the output changes when the input crosses zero volts. Voltage follower suggests a buffer whose output voltage matches the input voltage. Therefore I do not understand the request.
Please describe the input voltage range and the desired output voltage range.
Thank you your reply.
I will try to explain as much as I can.
Input voltage range is 0.000V to 6V.
Output need exactly same as input voltage.
I can provide the power more than 6V up to 24V but only positive voltage.
I am looking for some devise to meet above needs.
I hope this can help.
BEST REGARDS,
Hironari
Hironari-san,
LM7705 can be used to make a -200mV output. This -200mV is connected to the negative supply for any op amp. Therefore the op amp will be able to have a low voltage all the way down to 0.000V. The lowest possible op amp voltage is -200mV which is safe for the next stage for the data flow. The LM7705 needs a power source between 3V and 5V.
For the op amp selection, is there a bandwidth requirement. What is the output load?
Thank you your reply. But I appreciate if you could make a chace to read my previous e-mail again.
Only positive powere I can provide with more than 6V and need to detect 0.000V by buffa.
BEST REGARDS,
Hironari