Datasheet

−180
−160
−140
−120
−100
−80
−60
−40
−20
0
0 50 100 150 200 250
Frequency (Hz)
Amplitude (dBFS)
PGA Gain = 1
Input = 10Hz, −0.5 dBFS
THD = −103 dB
SNR =117 dB
Data Rate =500 sps
G011
−160
−140
−120
−100
−80
−60
−40
−20
0
0 1000 2000 3000 4000
Frequency (Hz)
Amplitude (dBFS)
PGA Gain = 1
Input = 10Hz, −0.5 dBFS
THD = −101 dB
SNR = 80 dB
Data Rate = 8 ksps
G012
0
1
2
3
4
2 4 6 8 10 12
PGA Gain
Integral Nonlinearity (ppm)
G009
−4
−2
0
2
4
−1 −0.5 0 0.5 1
Input Range (Normalized to Full−Scale)
Integral Nonlinearity (ppm)
−40 °C
−20 °C
0 °C
25 °C
40 °C
50 °C
70 °C
85 °C
G010
50
60
70
80
90
100
110
120
10 100 1k
Frequency (Hz)
Power Supply Rejection Ratio (dB)
Gain = 1
Gain = 2
Gain = 3
Gain = 4
Gain = 6
Gain = 8
Gain = 12
Data Rate = 8 kSPS, −0.5 dBFS
G007
−125
−115
−105
−95
−85
−75
−65
−55
10 100 1k
Frequency (Hz)
THD (dB)
Gain = 1
Gain = 2
Gain = 3
Gain = 4
Gain = 6
Gain = 8
Gain = 12
Data Rate = 8 kSPS, −0.5 dBFS
G008
ADS1291
ADS1292
ADS1292R
SBAS502B –DECEMBER 2011–REVISED SEPTEMBER 2012 www.ti.com
TYPICAL CHARACTERISTICS (continued)
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.
PSRR vs FREQUENCY THD vs FREQUENCY
Figure 8. Figure 9.
INL vs PGA GAIN INL vs TEMPERATURE
Figure 10. Figure 11.
THD FFT PLOT FFT PLOT
(60-Hz Signal) (60-Hz Signal)
Figure 12. Figure 13.
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