Hi. I am doing a very simple measurement to characterize the photodiode. I need to force a voltage on the photodiode and then measure the current. Pic below shows how we want to characterize the photodiode, basically I just want to monitor the photodiode current with time. It is kinda simple. I wonder whether TI has any evaluation board to help me to achieve my goal.
I have searched for this kind of evaluation board for a while. I noticed Jason recommended DDC112 EVM in in the following link: 
The product is good. However, it seems to be a little bit complicated. What we need is really simple: an amplifier which allows us to force a voltage then measure the current. Based on my description, our requirements and preferences (how we would like the measurement to be conducted) are listed as below:
1. the current input from the photodiode would be as low as 10pA(hopefully, or at least close to 100pA - 1000pA)
2. USB interface, so we can read the output directly through USB and with the help of some software (it is not a must, but we would like it very much if we can find a evaluation board which could have this feature.)
3. Interface between photodiode and evaluation board. (We want to characterize different photodiode. It would be better if the evaluation board provides the interface so we can connect the photodiode and evaluation board easily.)
