The basic signal and power connection circuit of broadband transconductance operational amplifier and buffer OPA660

Published:2012/8/22 21:38:00 Author:Ecco | Keyword: basic , signal , power, connection , broadband , transconductance, operational amplifier , buffer | From:SeekIC

It is the connection circuit for op amp OPA660, the signal is input by pin 3, then pin 8 will output current after the signal being amplified. Power supply terminal uses bypass capacitor filter which preferably uses solid tantalum capacitor as a filter capacitor, and the design of the PCB should allow the filter capacitor to close to the power supply terminal. Quiescent current is set by external resistor RQ connected to pin 1 and -VCc, and the change of resistor RQ can affect internal OTA of OPA660 to control their bandwidth, AC performance and transconductance. When ambient temperature at 25 ℃, OPA660 provides typically 20mA total quiescent current IQ, and that can be eached by setting RQ = 250Ω. The quiescent current IQ can change in the range of 16 ~ 26mA when RQ is fixed as 250Ω.



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