Datasheet

AD7794/AD7795
Rev. D | Page 21 of 36
Table 19. Update Rates Available (Chop Enabled)
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FS3 FS2 FS1 FS0 f
ADC
(Hz) T
SETTLE
(ms) Rejection @ 50 Hz/60 Hz (Internal Clock)
0 0 0 0 x x
0 0 0 1 470 4
0 0 1 0 242 8
0 0 1 1 123 16
0 1 0 0 62 32
0 1 0 1 50 40
0 1 1 0 39 48
0 1 1 1 33.2 60
1 0 0 0 19.6 101 90 dB (60 Hz only)
1 0 0 1 16.7 120 80 dB (50 Hz only)
1 0 1 0 16.7 120 65 dB (50 Hz and 60 Hz)
1 0 1 1 12.5 160 66 dB (50 Hz and 60 Hz)
1 1 0 0 10 200 69 dB (50 Hz and 60 Hz)
1 1 0 1 8.33 240 70 dB (50 Hz and 60 Hz)
1 1 1 0 6.25 320 72 dB (50 Hz and 60 Hz)
1 1 1 1 4.17 480 74 dB (50 Hz and 60 Hz)
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With chop disabled, the update rates remain unchanged, but the settling time for each update rate is reduced by a factor of 2. The rejection at 50 Hz/60 Hz for a
16.6 Hz update rate degrades to 60 dB.