ghostintranslation
Well-known member
Hi,
I'm doing a board that will accept a range of 0-5v as analog input. As Teensy 4.0 accepts only 0-3.3v I was looking at ways of making this work. So I was looking at linear optocouplers, opamps, resistor dividers... And finally I want to use an external I2C ADC which work with this range. It's the MCP3426A0T-E/MS which is a differential ADC.
Additionally I want to make sure no more than 5v and no less than 0v is getting in so I'm using 2 diodes in front of the ADC (let say I try to input 9v or -9v by mistake). I think the maximum the ADC can withstand is 5.5v which should be what it get if I try 9v before the diodes right?
I would like to confirm if this is going to work before I go buy components and PCBs?
On this schema, MUIN1C and MUIN2c are getting the voltage range, and the 5v is coming from Teensy 4.0 .
Thanks
I'm doing a board that will accept a range of 0-5v as analog input. As Teensy 4.0 accepts only 0-3.3v I was looking at ways of making this work. So I was looking at linear optocouplers, opamps, resistor dividers... And finally I want to use an external I2C ADC which work with this range. It's the MCP3426A0T-E/MS which is a differential ADC.
Additionally I want to make sure no more than 5v and no less than 0v is getting in so I'm using 2 diodes in front of the ADC (let say I try to input 9v or -9v by mistake). I think the maximum the ADC can withstand is 5.5v which should be what it get if I try 9v before the diodes right?
I would like to confirm if this is going to work before I go buy components and PCBs?
On this schema, MUIN1C and MUIN2c are getting the voltage range, and the 5v is coming from Teensy 4.0 .
Thanks