Datasheet

ADAS1000-3/ADAS1000-4 Data Sheet
Rev. A | Page 18 of 76
Figure 17. Typical Gain Error vs. Gain
Figure 18. Typical Gain Error for All Gain Settings Across Temperature
Figure 19. Typical ECG Channel Leakage Current over Input Voltage Range
vs. Temperature
Figure 20. DC Lead-Off Comparator Low Threshold vs. Temperature
Figure 21. DC Lead-Off Comparator High Threshold vs. Temperature
Figure 22. Filter Response with 40 Hz Filter Enabled, 2 kHz Data Rate; See
Figure 68 for Digital Filter Overview
0.001
0.021
0.041
0.061
0.081
0.101
0.121
GAIN 0 GAIN 1 GAIN 2 GAIN 3
GAIN ERROR (%)
AVDD = 3.3V
GAIN SETTING
10997-045
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
–40
–20
0
20
40
60
80
GAIN ERROR (%)
TEMPERATURE (°C)
GAIN ERROR G0
GAIN ERROR G1
GAIN ERROR G2
GAIN ERROR G3
AVDD = 3.3V
GAIN SETTING 0 = 1.4
GAIN SETTING 1 = 2.1
GAIN SETTING 2 = 2.8
GAIN SETTING 3 = 4.2
10997-046
–5
–4
–3
–2
–1
0
1
2
3
4
5
0.3 0.8 1.3 1.8 2.3
LEAKAGE (nA)
VOLT
AGE (V)
+85
°C
+55
°C
+25°C
–5
°C
–40°C
AVDD = 3.3V
GAIN SETTING 0 = 1.4
10997-047
0.180
0.185
0.190
0.195
0.200
0.205
0.210
0.215
–40 –20
0
20
40 60 80
THRESHOLD (V)
TEMPERA
TURE (°C)
ECG DC LEAD-OFF THRESHOLD
RLD DC LEAD-OFF THRESHOLD
AVDD = 3.3V
10997-048
2.375
2.380
2.385
2.390
2.395
2.400
2.405
2.410
2.415
2.420
–40 –20 0 20 40 60 80
HIGH THRESHOLD (V)
TEMPERATURE (°C)
ECG DC LEAD-OFF THRESHOLD
RLD DC LEAD-OFF THRESHOLD
AVDD = 3.3V
10997-049
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1 10 100 1k
GAIN (dB)
FREQUENCY (Hz)
AVDD = 3.3V
10997-050