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ADAS1000-4BSTZ 数据表(PDF) 59 Page - Analog Devices

部件名 ADAS1000-4BSTZ
功能描述  Low Power, Three Electrode Electrocardiogram (ECG) Analog Front End
PDF  80 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADAS1000-4BSTZ 数据表(HTML) 59 Page - Analog Devices

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Data Sheet
ADAS1000-3/ADAS1000-4
Table 29. Lead-Off Control Register (LOFFCTL) Address 0x02, Reset Value = 0x000000
AA
REE
AA
/W
Default
Bit
Name
Function
R/W
0
23
LAPH
AC lead-off phase.
0 (default) = in phase.
1 = 180° out of phase.
R/W
0
22
LLPH
R/W
0
21
RAPH
R/W
0
[20:19]
Reserved
Reserved, set to 0.
R/W
0
18
CEPH
AC lead-off phase.
0 (default) = in phase.
1 = 180° out of phase.
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.
0 (default) = ac lead-off disabled.
1 = ac lead-off enabled.
R/W
0
16
LLACLOEN
R/W
0
15
RAACLOEN
R/W
0
[14:13]
Reserved
Reserved, set to 0.
R/W
0
12
CEACLOEN
Individual electrode ac lead-off enable. AC lead-off enables are the OR of ACSEL and the
individual ac lead-off channel enables.
0 (default) = ac lead-off disabled.
1 = ac lead-off enabled.
R/W
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.
R/W
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, 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 59 of 80



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