Part Number: ADS1118
Hello, I am currently testing the performance of the ADS1118 chip to determine whether it meets our project requirements. I have encountered several issues during the testing process and would appreciate your assistance in addressing them. Thank you.
- When testing noise in μVRMS (μVPP) at VDD = 3.3 V, the ADC inputs were shorted as required and a bias voltage was applied. A total of 32,768 samples were acquired. Noise was calculated using the standard deviation method, and the measured results show a significant discrepancy compared with the values specified in the device datasheet.
- The μVPP values should be integer multiples of the minimum range, but those listed in the datasheet are not. For example, in the ±2.048 V column, the value at 128 SPS is 62.5 μVPP, while at 250 SPS it is 84.03 μVPP, and these two values are not integer multiples of each other.
