Datasheet

ADS1291
ADS1292
ADS1292R
SBAS502B –DECEMBER 2011–REVISED SEPTEMBER 2012 www.ti.com
Table 3. Input-Referred Noise (μV
RMS
/ μV
PP
) 3-V Analog Supply and 2.42-V Reference
(1)
PGA GAIN = 6 PGA GAIN = 8
DR BITS OUTPUT
OF DATA –3-dB NOISE- NOISE-
CONFIG1 RATE BANDWIDTH FREE FREE
REGISTER (SPS) (Hz) μV
RMS
μV
PP
SNR BITS ENOB μV
RMS
μV
PP
SNR BITS ENOB
000 125 32.75 0.5 3.0 115.9 18.04 19.26 0.4 2.6 114.0 17.82 18.94
001 250 65.5 0.7 4.1 112.8 17.58 18.73 0.6 3.9 111.0 17.22 18.44
010 500 131 0.9 5.6 109.9 17.14 18.25 0.8 5.5 108.0 16.75 17.93
011 1000 262 1.3 8.7 106.8 16.49 17.73 1.2 7.6 104.9 16.26 17.42
100 2000 524 2.2 16 102.1 15.64 16.96 2.0 14 100.7 15.36 16.72
101 4000 1048 7.5 77 91.5 13.34 15.19 5.5 56 91.7 13.39 15.24
110 8000 2096 42.7 436 76.4 10.84 12.69 31.3 319 76.6 10.88 12.73
111 NA NA — — — — — — — — — —
(1) At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
Table 4. Input-Referred Noise (μV
RMS
/ μV
PP
) 3-V Analog Supply and 2.42-V Reference
(1)
PGA GAIN = 12
DR BITS OUTPUT
OF DATA –3-dB NOISE-
CONFIG1 RATE BANDWIDTH FREE
REGISTER (SPS) (Hz) μV
RMS
μV
PP
SNR BITS ENOB
000 125 32.75 0.4 2.5 111.3 17.31 18.48
001 250 65.5 0.5 3.5 108.4 16.81 18.01
010 500 131 0.8 5.0 105.0 16.29 17.44
011 1000 262 1.1 6.9 102.1 15.82 16.97
100 2000 524 1.7 11 98.6 15.21 16.38
101 4000 1048 3.5 36 92.0 13.44 15.29
110 8000 2096 20.1 205 76.9 10.93 12.78
111 NA NA — — — — —
(1) At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
Table 5. Input-Referred Noise (μV
RMS
/ μV
PP
) 5-V Analog Supply and 4.033-V Reference
(1)
PGA GAIN = 1 PGA GAIN = 2
DR BITS OUTPUT
OF DATA –3-dB NOISE- NOISE-
CONFIG1 RATE BANDWIDTH FREE FREE
REGISTER (SPS) (Hz) μV
RMS
μV
PP
SNR BITS ENOB μV
RMS
μV
PP
SNR BITS ENOB
000 125 32.75 1.6 10.2 124.9 19.58 20.75 0.9 5.4 124.3 19.50 20.65
001 250 65.5 2.2 13.3 122.3 19.20 20.31 1.2 8.1 121.3 18.91 20.15
010 500 131 3.1 18.9 119.3 18.69 19.82 1.7 10.6 118.2 18.52 19.63
011 1000 262 4.9 31.9 115.2 17.94 19.14 2.7 17.9 114.4 17.77 19.00
100 2000 524 15.5 167 105.2 15.55 17.48 7.5 80 105.5 15.62 17.53
101 4000 1048 89.6 959 90.0 13.03 14.95 45.0 481 89.9 13.02 14.94
110 8000 2096 460.1 4923 75.8 10.67 12.59 229.0 2450 75.8 10.67 12.59
111 NA NA — — — — — — — — — —
(1) At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
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