Datasheet

−180
−160
−140
−120
−100
−80
−60
−40
−20
0
0 2000 4000 6000 8000
Frequency (Hz)
Amplitude (dBFS)
PGA Gain = 12
THD = −94 dB
SNR = 101 dB
Data Rate = 16 kSPS
G013
0
100
200
300
400
500
600
1 10 30
PGA Gain
Offset (µV)
G014
−10
−8
−6
−4
−2
0
2
4
6
8
−1 −0.8 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0.8 1
Input Range (Normalized to Full−Scale)
Integral Nonlinearity (ppm)
+25°C
−40°C
+85°C
Gain = 12
G011
−180
−160
−140
−120
−100
−80
−60
−40
−20
0
0 50 100 150 200 250
Frequency (Hz)
Amplitude (dBFS)
PGA Gain = 12
THD = −99 dB
SNR = 120 dB
Data Rate = 500 SPS
G012
−105
−100
−95
−90
−85
−80
−75
−70
−65
−60
10 100 1000
Frequency (Hz)
Total Harmonic Distortion (dB)
Gain = 1
Gain = 2
Gain = 4
Gain = 6
Gain = 8
Gain = 12
Gain = 24
Data Rate = 8 kSPS
A
IN
= −0.5 dBFS
G009
−10
−8
−6
−4
−2
0
2
4
6
8
10
12
−1 −0.8 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0.8 1
Input (Normalized to Full-Scale)
Integral Nonlinearity (ppm)
Gain = 1
Gain = 2
Gain = 4
Gain = 6
Gain = 8
Gain = 12
Gain = 24
G010
ADS1299
SBAS499A –JULY 2012–REVISED AUGUST 2012 www.ti.com
TYPICAL CHARACTERISTICS (continued)
All plots are at T
A
= +25°C, AVDD = 5 V, AVSS = 0 V, DVDD = 3.3 V, internal VREFP = 4.5 V, VREFN = AVSS, external
clock = 2.048 MHz, data rate = 250 SPS, and gain = 12, unless otherwise noted.
THD vs FREQUENCY INL vs PGA GAIN
Figure 9. Figure 10.
THD FFT PLOT
INL vs TEMPERATURE (60-Hz Signal)
Figure 11. Figure 12.
FFT PLOT OFFSET vs PGA GAIN
(60-Hz Signal) (Absolute Value)
Figure 13. Figure 14.
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