LED Control Via Opamp

Question

Dear AD Community member, 
 
 I would like to know if it's possible to control the Photo transmitter ( www.digikey.in/.../1636288 using the current feedback amplifier AD8009. Could you please confirm? 
 
 best regards, 
 Neeraj 
 HW Engineer 
 Radifonics Solutions Pvt Ltd

Kenneth11 · Accepted Answer

Hello Neeraj, 
 Your circuit is correct since you are using the SOIC package. In cases where you need to add a feedback capacitor for stability, please check this article ( Compensating Current Feedback Amplifiers in Photocurrent Applications | Analog Devices ) to determine the proper value of Cf to be added. Wrong values of Cf can make the output of AD8009 oscillate since it is a current feedback op amp. 
 
 Best Regards, Kenneth)

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LED Control Via Opamp