Datasheet

ADS1291
ADS1292
ADS1292R
www.ti.com SBAS502B –DECEMBER 2011–REVISED SEPTEMBER 2012
Table 6. Input-Referred Noise (μV
RMS
/ μV
PP
) 5-V Analog Supply and 4.033-V Reference
(1)
PGA GAIN = 3 PGA GAIN = 4
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 0.6 4.2 123.4 19.28 20.50 0.5 3.6 122.3 19.08 20.32
001 250 65.5 0.9 5.7 120.7 18.82 20.04 0.7 4.8 119.5 18.66 19.86
010 500 131 1.3 8.4 117.3 18.27 19.49 1.1 7.4 116.2 18.04 19.31
011 1000 262 2.0 13.3 113.5 17.62 18.85 1.6 11.0 112.7 17.48 18.72
100 2000 524 5.1 53 105.3 15.61 17.49 3.9 38 105.2 15.67 17.47
101 4000 1048 28.7 307 90.3 13.08 15.00 20.7 222 90.6 13.14 15.06
110 8000 2096 149.3 1598 76.0 10.70 12.62 111.8 1196 76.0 10.71 12.63
111 NA NA — — — — — — — — — —
(1) At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
Table 7. Input-Referred Noise (μV
RMS
/ μV
PP
) 5-V Analog Supply and 4.033-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 3.0 120.4 18.78 19.99 0.4 2.7 118.5 18.48 19.68
001 250 65.5 0.6 4.0 117.5 18.36 19.52 0.6 3.8 115.7 18.01 19.21
010 500 131 0.9 6.0 114.3 17.75 18.99 0.8 5.3 112.8 17.53 18.74
011 1000 262 1.4 8.8 110.8 17.20 18.41 1.2 8.1 109.5 16.92 18.19
100 2000 524 2.8 24 104.6 15.74 17.38 2.3 18 103.6 15.73 17.22
101 4000 1048 13.3 142 91.0 13.20 15.12 9.3 100 91.5 13.29 15.21
110 8000 2096 71.5 765 76.4 10.77 12.69 52.3 560 76.6 10.80 12.72
111 NA NA — — — — — — — — — —
(1) At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
Table 8. Input-Referred Noise (μV
RMS
/ μV
PP
) 5-V Analog Supply and 4.033-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 2.6 115.7 17.96 19.21
001 250 65.5 0.5 3.4 112.9 17.59 18.75
010 500 131 0.8 5.2 109.8 16.96 18.24
011 1000 262 1.1 6.9 106.6 16.56 17.70
100 2000 524 1.9 14 101.9 15.57 16.83
101 4000 1048 5.9 63 92.0 13.37 15.29
110 8000 2096 33.8 362 76.9 10.85 12.77
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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