Hi,
Good day.
Our customer watched the "How to Design Transimpedance Amplifier Circuits" () and they have a question on photodiode application. I copied their inquiry below. I would appreciate if you could help us o this.
"I want to know how to convert an input current from an array of for example 50 photodiodes to an output voltage that ranges from 0V to 5V or 0 to 10V.
The array of photodiodes should be on some kind of frame 1m x 1m. This supposed to be a sensing area. One side will be an array of IC emitters and the other side (receiver side) array of IC photodiodes (BPV10NF).
I found TI example with transimpendance amplifier circuit for one photodiode and when the photodiode is illuminated amplifier output reflects as voltage jump at the output of the amplifier. In my case they are constantly illuminated, also there is an array of them and when objects pass this area it should be detected - voltage on the amplifier should increase.
I am wondering can I make the parallel connection of photodiodes and is it better to use other kind of amp. and how to design it."
Thank you for your kind support.
Regards,
Cedrick