ADC conversion times for shunt voltage, bus voltage and temperature can be set independently from 50 μs to 4.12 ms. The flexibility in conversion time allows for robust operation in a variety of noisy environments. The device also allows for programmable averaging times from a single conversion all the way to an average of 1024 conversions. The amount of averaging selected applies uniformly to all active measurement inputs. The ADC_CONFIG register shown in Table 7-6 provides additional details on the supported conversion times and averaging modes. The INA238-Q1 effective resolution of the ADC can be increased by increasing the conversion time and increasing the number of averages. Figure 7-4 and Figure 7-5 shown below illustrate the effect of conversion time and averaging on a constant input signal.

Settings for the conversion time and number of conversions averaged impact the effective measurement resolution. For more detailed information on how averaging reduces noise and increases the effective number of bits (ENOB) see Section 8.1.3.