Datasheet

Data Sheet ADAS1000/ADAS1000-1/ADAS1000-2
Rev. A | Page 19 of 80
Figure 18. Typical Gain Error vs. Gain
Figure 19. Typical Gain Error for All Gain Settings Across Temperature
Figure 20. Typical ECG Channel Leakage Current over Input Voltage Range vs.
Temperature
Figure 21. DC Lead-Off Comparator Low Threshold vs. Temperature
Figure 22. DC Lead-Off Comparator High Threshold vs. Temperature
Figure 23. Filter Response with 40 Hz Filter Enabled, 2 kHz Data Rate; See
Figure 72 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
09660-045
GAIN SETTING
–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
09660-046
–5
–4
–3
–2
–1
0
1
2
3
4
5
0.3 0.8 1.3 1.8 2.3
LEAKAGE (nA)
VOLTAGE (V)
+85°C
+55°C
+25°C
–5°C
–40°C
AVDD = 3.3V
GAIN SETTING 0 = 1.4
09660-047
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)
TEMPERATURE (°C)
ECG DC LEAD-OFF THRESHOLD
RLD DC LEAD-OFF THRESHOLD
AVDD = 3.3V
09660-048
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
09660-049
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1 10 100 1k
GAIN (dB)
FREQUENCY (Hz)
AVDD = 3.3V
09660-050