ADS1299
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SBAS499A –JULY 2012–REVISED AUGUST 2012
Table 3. Input-Referred Noise (μVRMS / μVPP) in Normal Mode
5-V Analog Supply and 4.5-V Reference(1)
PGA
PGA
GAIN = 8
GAIN = 12
DR BITS OF
CONFIG1
REGISTER
OUTPUT
DATA RATE
(SPS)
NOISE-
FREE
NOISE-
FREE
BITS
–3-dB
BANDWIDTH (Hz)
μVRMS
3.05
1.11
0.79
0.56
0.39
0.28
0.20
—
μVPP
21.32
7.80
5.52
3.90
2.76
1.95
1.38
—
SNR (dB)
102.3
111.0
114.0
117.1
120.1
123.1
126.1
—
BITS
15.69
17.14
17.64
18.14
18.64
19.14
19.64
—
ENOB
16.99
18.45
18.95
19.44
19.94
20.44
20.95
—
μVRMS
2.27
0.92
0.65
0.46
0.32
0.23
0.16
—
μVPP
15.89
6.41
4.53
3.20
2.26
1.61
1.13
—
SNR (dB)
101.3
109.2
112.2
115.2
118.3
121.2
124.3
—
ENOB
16.83
18.14
18.64
19.14
19.65
20.14
20.65
—
000
001
010
011
100
101
110
111
16000
8000
4000
2000
1000
500
4193
2096
1048
524
262
131
65
15.53
16.84
17.34
17.84
18.34
18.83
19.34
—
250
n/a
n/a
(1) At least 1000 consecutive readings were used to calculate the RMS and peak-to-peak noise values in this table.
Table 4. Input-Referred Noise (μVRMS / μVPP) in Normal Mode
5-V Analog Supply and 4.5-V Reference(1)
PGA
GAIN = 24
DR BITS OF
CONFIG1
REGISTER
OUTPUT
DATA RATE
(SPS)
NOISE-
FREE
BITS
–3-dB
BANDWIDTH (Hz)
μVRMS
1.66
0.80
0.56
0.40
0.28
0.20
0.14
—
μVPP
11.64
5.57
3.94
2.79
1.97
1.39
0.98
—
SNR (dB)
98.0
ENOB
16.28
17.35
17.84
18.35
18.85
19.35
19.85
—
000
001
010
011
100
101
110
111
16000
8000
4000
2000
1000
500
4193
2096
1048
524
262
131
65
14.98
16.04
16.54
17.04
17.54
18.04
18.54
—
104.4
107.4
110.4
113.5
116.5
119.5
—
250
n/a
n/a
(1) At least 1000 consecutive readings were used to calculate the RMS and peak-to-peak noise values in this table.
Copyright © 2012, Texas Instruments Incorporated
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