Will a unpowered ADM1191 IC effect the I2C bus?
In that case you don't need them.
You can short SENSE pin to VCC and ground the SETV and ALERTB pin.
hi there .
i plan to use adm1191 monitor to measure another chip's input voltage and current . and my teacher request a theoratical analysis . i got 2 questions while reading the datasheet:
1. the voltage supply of 1191 ranged from 3.15V to 26V…
We would like to design the ADM1191 for POL power monitor application.
So far I have three question for this schematic
1. SETV pin, if we dont need to setting the alertb, may I floating this pin or any suggestion for this connection.
I use ADM1191 as a power meter (voltage and current) for motor control application. I init IC to continious convert both voltage and current, or voltage only, or current only. MCU reads values by I2C but returned voltage is less than measured…
Unfortunately, at this point, we don't have any ADM1191 no-OS driver.
For specific questions about the part, please open a thread on: https://ez.analog.com/power/f/q-a
I suspect when you are getting back the wrong voltage and current values, the data are all 0xFF.
Could you check if this is the case?
I can't see the sense resistor values very clearly on your diagram, but based on the voltage readings…
There are probably several dozen different ways to do this. Since you want to receive the value in digital form, I suggest that you use one of our high side current monitors. Take a look at these:
LTC4151 High voltage I2C voltage and current…