ADS1291_14 Datasheet, PDF (15/75 Pages) Texas Instruments – Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements

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ADS1291
ADS1292
ADS1292R
SBAS502B – DECEMBER 2011 – REVISED SEPTEMBER 2012
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.
OFFSET vs PGA GAIN
(Absolute Value)
300
TEST SIGNAL AMPLITUDE ACCURACY
60
Data from 96 devices, Two lots
250
200
40
150
100
20
50
0
0
0
2
4
6
8
10
12
PGA Gain (dB)
G013
Error (%)
G014
Figure 14.
Figure 15.
LEAD-OFF COMPARATOR THRESHOLD ACCURACY
140
Data from 96 devices, Two Lots
120
100
80
60
40
20
0
Threshold Error (mV)
G015
Figure 16.
LEAD-OFF CURRENT SOURCE ACCURACY DISTRIBUTION
120 _{Data from 125 devices, Two lots}
Current Setting = 24 nA
100
80
60
40
20
0
Error in Current Magnitude (nA)
G016
Figure 17.
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