Tool/software:
According to datasheet of INA296A, the linear range of the output stage swing to Ground is limited to 20mV(max). Seems it can not detect current less than 4mA if using gain=50 and external shunt resistor=0.1ohm. circuit as below, If connect the gnd pin to -0.3V, i think it will detect current less than 4mA. So I want to know if the GND pin can connect to -0.3V and what would be the impact of that.
I will use the following circuit to get the -0.3V voltage. Is it ok to get the -0.3V? the REF pins connect to a higher reference voltage is better than connect to GND?
1. If connect the REF1 pin to the 2.5V, REF2 pin to the GND, is the linear range of the output stage swing to Ground still limited to 1.25V+20mV(max) or what is the linear range of the output stage swing to Ground?
2. If connect the REF1 pin to the 2.5V, REF2 pin to the GND, what would be the gain error, It still be ±0.01% from GND+50mv to Vs-200mV or ±0.01% from GND to Vs-200mV?
