LTC6268 input current for TIA application.

Question

Hi, 
 We want to use the LTC6268 as a TIA to convert photodiode current into voltage. 
 Our photodiode current range is between 2 to 3 mA. However, the Input Protection section of the datasheet mentions that the input current should be less than 1 mA. 
 I want to know if our photodiode current range is safe for this application? 
 Thanks. 
 Adam Shiau

PaulCA · Accepted Answer

Hello AdamShiau , Based on your application and requirements, AD8065/AD8066 looks the suitable part for you. You can check the part's data sheet for more details. Here is the link to the part's data sheet: AD8065/AD8066 (Rev. L) (analog.com) Best regards, Paul)

PaulCA · Answer

Hello AdamShiau , As indicated on the part's data sheet, the input current should be limited to less than 1mA. Having input currents of around 2-3mA can potentially damage the part. Though may I ask, when you have chosen LTC6288, what are the key parameters/specifications that you have considered? Depending on those specs, maybe we can recommend another ADI part with a higher input current rating that will suite your application. Thank you, Best regards, Paul

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LTC6268 input current for TIA application.