Datasheet

AD7142
Rev. A | Page 5 of 72
PLASTIC OVERLAY
SENSOR BOARD
C
BULK
C
IN
CAPACITIVE SENSOR
05702-054
Figure 2.
Table 2. Typical Average Current in Low Power Mode, AV
CC
, DV
CC
= 3.6 V, T= 25°C, Load of 50 pF on SRC Pin, No Load on
SRC
Number of Conversion Stages (Current Values Expressed in A)
Low Power Mode
Delay
Decimation
Rate
1 2 3 4 5 6 7 8 9 10 11 12
200 ms 128 26.4 33.3 40.1 46.9 53.5 60 66.5 72.8 79.1 85.2 91.3 97.3
256 35.6 49.1 62.2 74.9 87.3 99.3 111 122.3 133.4 144.2 154.7 164.9
400 ms 128 21.3 24.8 28.3 31.7 35.2 38.6 42 45.4 48.7 52 55.3 58.6
256 26 32.9 39.7 46.5 53.1 59.6 66.1 72.4 78.7 84.9 91 97
600 ms 128 19.6 21.9 24.3 26.6 28.9 31.2 33.5 35.8 38.1 40.4 42.6 44.8
256 22.7 27.4 32 36.6 41.1 45.6 50 54.4 58.8 63.1 67.4 71.6
800 ms 128 18.7 20.5 22.2 24 25.7 27.5 29.2 31 32.7 34.4 36.1 37.8
256 21.1 24.6 28.1 31.5 35 38.4 41.8 45.2 48.5 51.8 55.1 58.4
Table 3. Maximum Average Current in Low Power Mode, AV
CC
, DV
CC
= 3.6 V, Load of 50 pF on SRC Pin, No Load on
SRC
Number of Conversion Stages (Current Values Expressed in A)
Low Power Mode
Delay
Decimation
Rate
1 2 3 4 5 6 7 8 9 10 11 12
200 ms 128 45.4 53.6 61.5 69.4 77.1 84.7 92.2 99.6 106.8 113.9 121 127.9
256 56.2 72 87.2 102 116.3 130.2 143.7 156.8 169.5 181.8 193.8 205.5
400 ms 128 39.5 43.6 47.7 51.8 55.8 59.8 63.7 67.6 71.5 75.4 79.2 83
256 45 53.1 61.1 68.9 76.7 84.3 91.8 99.1 106.4 113.6 120.6 127.5
600 ms 128 37.5 40.3 43 45.8 48.5 51.2 53.9 56.5 59.2 61.8 64.5 67.1
256 41.2 46.7 52.1 57.4 62.7 67.9 73.1 78.2 83.3 88.3 93.3 98.2
800 ms 128 36.5 38.6 40.7 42.7 44.8 46.8 48.8 50.9 52.9 54.9 56.9 58.9
256 39.3 43.4 47.5 51.5 55.6 59.5 63.5 67.4 71.3 75.2 79 82.8