Other Parts Discussed in Thread: ADS112C04
Hi everyone,
Question 1: The question is about Fugure 44 in the datasheet. If the input common mode of the ADS122C04 drifts out of the mid supply and is gained by the PGA to a not allowed voltage level, what behavior would the ADC show on the output? Does the ADC recognize the issue or does it cut the voltage on the supply rail? Please find attached a modified figure of this scenario
Question 2: we want to measure small currents through a shunt resistor. But there could also appear higher currents through the shunt in this application. This would cause a voltage drop, which could be higher than AVDD or lower than AVSS. What needs to be considered in this case? Are the internal clamping diodes designed for that or need external diodes? Point 9.2.1.2 also mentions series resistances.
Thak you in advance!
Regards, Alen