LMP90100_13 Datasheet, PDF (12/69 Pages) Texas Instruments – LMP90100/LMP90099/LMP90098/LMP90097 Sensor AFE System: Multi-Channel, Low Power 24-Bit Sensor AFE with True Continuous Background Calibration

LMP90100
SNAS510P – JANUARY 2011 – REVISED MARCH 2013
www.ti.com
Table 2. ENOB (Noise Free Resolution) vs. Sampling Rate and Gain at VA = VIO = VREF = 3V
ODR (SPS)
1.6775
3.355
6.71
13.42
26.83125
53.6625
107.325
214.65
1
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
2
20.5 (18)
20 (17.5)
19.5 (17)
18.5 (16)
20 (17.5)
19.5 (17)
19 (16.5)
18.5 (16)
4
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
8
19 (16.5)
18.5 (16)
18 (15.5)
17.5 (15)
19 (16.5)
18.5 (16)
18 (15.5)
17.5 (15)
Gain
16
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
20 (17.5)
19.5 (17)
19 (16.5)
18.5 (16)
32
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
19 (16.5)
18.5 (16)
18 (15.5)
17.5 (15)
64
19 (16.5)
18.5 (16)
17.5 (15)
17.5 (15)
18 (15.5)
17.5 (15)
17 (14.5)
17 (14.5)
128
18 (15.5)
17 (14.5)
17 (14.5)
16.5 (14)
17.5 (15)
17 (14.5)
16.5 (14)
16 (13.5)
ODR (SPS)
1.6775
3.355
6.71
13.42
26.83125
53.6625
107.325
214.65
Table 3. RMS Noise (µV) vs. Sampling Rate and Gain at VA = VIO = VREF = 3V
1
3.08
4.56
6.15
8.60
3.35
4.81
6.74
9.52
2
1.90
2.70
4.10
5.85
2.24
3.11
4.51
6.37
4
1.53
2.21
3.16
4.29
1.65
2.37
3.38
4.72
Gain of the ADC
8
16
1.27
0.23
1.67
0.34
2.39
0.51
3.64
0.67
1.33
0.33
1.90
0.44
2.66
0.63
3.79
0.90
32
0.21
0.27
0.40
0.54
0.27
0.39
0.54
0.79
64
0.15
0.24
0.37
0.51
0.26
0.37
0.52
0.72
128
0.14
0.26
0.35
0.49
0.25
0.36
0.49
0.70
Table 4. ENOB (Noise Free Resolution) vs. Sampling Rate and Gain at VA = VIO = VREF = 5V
SPS
1.6775
3.355
6.71
13.42
26.83125
53.6625
107.325
214.65
1
21.5 (19)
21 (18.5)
20.5 (18)
20 (17.5)
21.5 (19)
21 (18.5)
20.5 (18)
20 (17.5)
2
21.5 (19)
21 (18.5)
20 (17.5)
19.5 (17)
21 (18.5)
20.5 (18)
20 (17.5)
19.5 (17)
4
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
Gain of the ADC
8
16
20 (17.5)
21 (18.5)
19.5 (17)
20.5 (18)
19 (16.5)
20 (17.5)
18.5 (16)
20 (17.5)
20 (17.5)
21 (18.5)
19.5 (17)
20.5 (18)
19 (16.5)
20 (17.5)
18.5 (16)
19.5 (17)
32
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
20 (17.5)
19.5 (17)
19 (16.5)
18.5 (16)
64
19.5 (17)
19 (16.5)
19 (16.5)
18 (15.5)
19.5 (17)
18.5 (16)
18 (15.5)
17.5 (15)
128
18.5 (16)
18 (15.5)
17.5 (15)
17.5 (15)
18 (15.5)
17.5 (15)
17 (14.5)
16.5 (14)
SPS
1.6775
3.355
6.71
13.42
26.83125
53.6625
107.325
214.65
Table 5. RMS Noise (µV) vs. Sampling Rate and Gain at VA = VIO = VREF = 5V
1
2.68
3.86
5.23
7.94
2.90
4.11
5.74
8.25
2
1.65
2.36
3.49
5.01
1.86
2.60
3.72
5.31
4
1.24
1.78
2.47
3.74
1.34
1.90
2.72
3.82
Gain of the ADC
8
16
1.00
0.22
1.47
0.34
2.09
0.44
2.94
0.61
1.08
0.29
1.50
0.39
2.11
0.56
2.97
0.79
32
0.19
0.27
0.34
0.50
0.24
0.35
0.48
0.68
64
0.17
0.22
0.30
0.45
0.23
0.32
0.46
0.64
128
0.16
0.22
0.32
0.43
0.23
0.31
0.44
0.63
12
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