My application is to use the LTC 2946 in a serial connected string of batteries to measure total string current and voltage appliyng it in two distinct design:
One for -48V as commoly used in telecom industry, and another one to be used to read from +4 to +500V.
The wide range voltage operation is what I'm looking for, considering that with only a few manual circuit board configuration changes, will enable me to design a common circuit for a wide range of voltages measurements in distinct strings.
The voltage and current measurement is all I need, The Coloumb counter is a plus feature. I will try to desgin two distinct applications, one for telecom voltages i.e. -48v operation strings, and another one for 4 to 500V operation, this last one I will need a help too.
My doubts about my the IC use are:
As already answered before in another post, LTC 2946 cannot process negative numbers when Rsense is submitted to a backwards current, i.e. its is not bidirectional:
In this situation, having a backwards current;
Can we still reading the current converted by A/D and sampled as a positive number?
The LTC2946 doens't know the Rsense resistor (shunt resistor) value and only process the voltage potencial across its pins, considering this:
Can I use an analog open loop hall effect current transducers instead of a shunt resistor, directly or indirectly to have a full scale range of 102.4mV?
Its possible to derivate the datasheet example of -4 to -500V voltage meter to accoplish my needs to +4 to +500 using an external power supply for the IC?
Thank you for attention!