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ADS1291I Datasheet(PDF) 8 Page - Texas Instruments

Part # ADS1291I
Description  Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS1291I Datasheet(HTML) 8 Page - Texas Instruments

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ADS1291
ADS1292
ADS1292R
SBAS502A – DECEMBER 2011 – REVISED MARCH 2012
www.ti.com
Table 3. Input-Referred Noise (
μVRMS/μVPP) 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)
μVRMS
μVPP
SNR
BITS
ENOB
μVRMS
μVPP
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 (
μVRMS/μVPP) 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)
μVRMS
μVPP
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 (
μVRMS/μVPP) 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)
μVRMS
μVPP
SNR
BITS
ENOB
μVRMS
μVPP
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.
8
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