Hello,
I have to drive 16 rows of a matrix of photodiodes,
I have to provide a positive voltage in the range +0,4V, +3V to the row I want to activate, meanwhile I have to provide negative voltage in the range -4V -0,2V to all the other 15 rows. The difficulty is that I have to control the rows and the voltage via I2C bus , that means I have a microcontroller acting as I2C master device. I already have 6 power supplies +5V for digital part,+5V for analog part,-5V for digital part,-5V for analog part,+12V and-12V.
Somebody can help me to design this circuit? What component I should use?
I have to drive 16 rows of a matrix of photodiodes,
I have to provide a positive voltage in the range +0,4V, +3V to the row I want to activate, meanwhile I have to provide negative voltage in the range -4V -0,2V to all the other 15 rows. The difficulty is that I have to control the rows and the voltage via I2C bus , that means I have a microcontroller acting as I2C master device. I already have 6 power supplies +5V for digital part,+5V for analog part,-5V for digital part,-5V for analog part,+12V and-12V.
Somebody can help me to design this circuit? What component I should use?