Averaging is a feature which increases the sample accuracy. ADC automatically computes an average value of multiple consecutive conversions. The numbers of samples to be averaged is specified by the Number-of-Samples-to-be-collected bit group in the Average Control register (AVGCTRL.SAMPLENUM[3:0]) and the averaged output is available in the Result register (RESULT).
Table 37-29. Averaging
Feature (Device Variant
A)| Average Number | Conditions | SNR (dB) | SINAD (dB) | SFDR (dB) | ENOB (bits) |
|---|
| 1 | In differential mode,
1x gain, VDDANA=3.0V, VREF=1.0V, 350kSps at 25°C | 66.0 | 65.0 | 72.8 | 9.75 |
| 8 | 67.6 | 65.8 | 75.1 | 10.62 |
| 32 | 69.7 | 67.1 | 75.3 | 10.85 |
| 128 | 70.4 | 67.5 | 75.5 | 10.91 |
Table 37-30. Averaging
Feature (Device Variant B,C, D and L)| Average Number | Conditions | SNR (dB) | SINAD (dB) | SFDR (dB) | ENOB (bits) |
|---|
| 1 | In differential mode,
1x gain, VDDANA=3.0V, VREF=1.0V, 350kSps at 25°C | 66.0 | 65.0 | 72.8 | 10.5 |
| 8 | 67.6 | 65.8 | 75.1 | 10.62 |
| 32 | 69.7 | 67.1 | 75.3 | 10.85 |
| 128 | 70.4 | 67.5 | 75.5 | 10.91 |
