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 1. Averaging Feature (Devcie 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 2. Averaging Feature (Device Variant B)| 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 |