We are going to use AD4111 in our project.
We want 4 single-ended bipolar ±10 V voltage inputs, the input pins are VIN0~VIN3.
Open wire detection function is necessary.
Here are my questions:
1. In datasheet, It says “The VIN0 and VINCOM pins are left floating. Nothing is connected to the pins.” in example 1.
But I think VINCOM needs connected to GND, is that right?
2. When I configure the registers of VIN1,I should configure CHANNEL REGISTER 1 (CH1)and CHANNEL REGISTER 2(CH2)INPUT bits to 0000110000.
Make sure the input pair(VIN1, VINCOM)is connected to channel 1 and channel 2. Is that right?
3. When I select the input pair(VIN0, VINCOM)connected to the channel 0 and channel 15. I wonder how the chip is connected inside. Why they have two different output code?
Do the channel 0 connect like this?
And the channel 15 connect like this?
4.I also want to know the specific principle and process of open wire detection. What is COMPA pin used for?
Thank you very much!