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ADAS1000BSTZ Datasheet(PDF) 58 Page - Analog Devices

Part # ADAS1000BSTZ
Description  Low Power, Five Electrode Electrocardiogram (ECG) Analog Front End
PDF  80 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADAS1000BSTZ Datasheet(HTML) 58 Page - Analog Devices

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ADAS1000/ADAS1000-1/ADAS1000-2
Data Sheet
Table 29. Lead-Off Control Register (LOFFCTL) Address 0x02, Reset Value = 0x000000
R/W
Default
Bit
Name
Function
R/W
0
23
LAPH
AC lead-off phase.
R/W
0
22
LLPH
0 (default) = in phase.
R/W
0
21
RAPH
1 = 180° out of phase.
R/W
0
20
V1PH
R/W
0
19
V2PH
R/W
0
18
CEPH
R/W
0
17
LAACLOEN
Individual electrode ac lead-off enable. AC lead-off enables are the OR of ACSEL and the
individual ac lead-off channel enables.
R/W
0
16
LLACLOEN
R/W
0
15
RAACLOEN
0 (default) = ac lead-off disabled.
R/W
0
14
V1ACLOEN
1 = ac lead-off enabled.
R/W
0
13
V2ACLOEN
R/W
0
12
CEACLOEN
R
0
[11:9]
Reserved
Reserved, set to 0.
R/W
00
[8:7]
ACCURRENT
Set current level for ac lead-off.
00 (default) = 12.5 nA rms.
01 = 25 nA rms.
10 = 50 nA rms.
11 = 100 nA rms.
00
[6:5]
Reserved
Reserved, set to 0.
R/W
000
[4:2]
DCCURRENT
Set current level for dc lead-off (active only for ACSEL = 0).
000 (default) = 0 nA.
001 = 10 nA.
010 = 20 nA.
011 = 30 nA.
100 = 40 nA.
101 = 50 nA.
110 = 60 nA.
111 = 70 nA.
R/W
0
1
ACSEL
DC or AC (out-of-band) lead-off detection.
ACSEL acts as a global ac lead-off enable for RA, LL, LA, V1, V2 electrodes (CE ac lead-off is not
enabled using ACSEL). AC lead-off enables are the OR of ACSEL and the individual ac lead-off
channel enables.
If LOFFEN = 0, this bit is don’t care.
If LOFFEN = 1,
0 (default) = dc lead-off detection enabled (individual ac lead-off can be enabled through
Bits[17:12]).
1 = dc lead-off detection disabled. AC lead-off detection enabled (all electrodes except CE
electrode).
When the calibration DAC is enabled, ac lead-off is disabled.
R/W
0
0
LOFFEN
Enable lead-off detection.
0 (default) = lead-off disabled.
1 = lead-off enabled.
Rev. B | Page 58 of 80



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