Datasheet

0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 0.5 1 1.5 2 2.5 3
8 kHz Chop Rate
32 kHz Chop Rate
64 kHz Chop Rate
Input Signal (V)
Leakage Current (nA)
G030
0
0.5
1
1.5
2
2.5
−40 −15 10 35 60 85
Temperature (°C)
Leakage Current (nA)
AVDD = 3 V, Chop = 8 k
AVDD = 3 V, Chop = 32 k
AVDD = 3 V, Chop = 64 k
AVDD = 5 V, Chop = 8 k
AVDD = 5 V, Chop = 32 k
AVDD = 5 V, Chop =64 k
G006
2.416
2.418
2.42
2.422
2.424
−40 −15 10 35 60 85
Temperature (°C)
Internal Reference (V)
G003
−135
−130
−125
−120
−115
−110
−105
−100
−95
10 100 1k
Frequency (Hz)
Common−Mode Rejection Ratio (dB)
Gain = 1
Gain = 2
Gain = 3
Gain = 4
Gain = 6
Gain = 8
Gain = 12
Data Rate = 8 kSPS
AIN = AVDD − 0.3 V to AVSS + 0.3 V
G004
−4
−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
−4
−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
0
200
400
600
800
1000
1200
Input−Referred Noise (µV)
Occurences
G002
−4
−3
−2
−1
0
1
2
3
4
0 2 4 6 8 10
Time (sec)
Input−Referred Noise (µV)
Peak−to−Peak Over 10 seconds = 8 µV
G001
ADS1291
ADS1292
ADS1292R
www.ti.com SBAS502B –DECEMBER 2011–REVISED SEPTEMBER 2012
TYPICAL CHARACTERISTICS
At T
A
= +25°C, AVDD = 3 V, AVSS = 0 V, DVDD = 1.8 V, internal VREFP = 2.42 V, VREFN = AVSS, external clock =
512 kHz, data rate = 500 SPS, C
FILTER
= 4.7 nF, and gain = 6, unless otherwise noted.
INPUT-REFERRED NOISE NOISE HISTOGRAM
Figure 2. Figure 3.
INTERNAL REFERENCE vs TEMPERATURE CMRR vs FREQUENCY
Figure 4. Figure 5.
LEAKAGE CURRENT vs INPUT VOLTAGE LEAKAGE CURRENT vs TEMPERATURE
Figure 6. Figure 7.
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