Datasheet

Data Sheet ADAS1000/ADAS1000-1/ADAS1000-2
Rev. A | Page 31 of 80
Figure 58. Flexible Front-End Configuration—Showing Analog Lead Mode Configuration Relative to Wilson Central Terminal (WCT)
Figure 59. Flexible Front-End Configuration—Showing Single-Ended Electrode Configuration
VCM = WCT = (LA + LL + RA)/3
COMMON-
MODE AMP
ECG1_LA
ECG2_LL
ECG3_RA
ECG4_V1
ECG5_V2
AMP
ADC
ADC
ADC
ADC
ADC
CM_IN
for example RA
COMMON
ELECTRODE CE IN
+
–
CM_OUT/WCT
LEAD I
(LA – RA)
LEAD III
(LL – LA)
LEAD II
(LL – RA)*
V1’ = V1 – WCT
V2’ = V2 – WCT
ECGCTL 0x01[10] CHCONFIG = 1
FRMCTL 0x0A[4] DATAFMT = 0
DIFFERENTIAL INPUT – LEAD FORMAT
WCT = (LA + LL + RA)/3
WCT = (LA + LL + RA)/3
*GETS MULITPLED
BY –1 IN DIGITAL
AMP
+
–
AMP
+
–
AMP
+
–
AMP
+
–
09660-015
VCM
COMMON-
MODE AMP
AMP
ADC
ADC
ADC
ADC
ADC
CM_IN
for example, RA
COMMON
ELECTRODE CE IN
FRMCTL 0x0A[4] = 0 CONFIGURES
SINGLE-ENDED LEAD FORMAT
WHERE LEADS ARE CALCULATED
DIGITALLY AFTER ADC PROCESSING.
+
–
CM_OUT/WCT
LA – VCM
LL – VCM
RA – VCM
V1 – VCM
V2 – VCM
ECGCTL 0x01[10] CHCONFIG = 0
FRMCTL 0x0A[4] DATAFMT = 1
SINGLE ENDED ELECTRODE FORMAT
COMMON MODE
CAN BE ANY
COMBINATION
OF ELECTRODES
AMP
+
–
AMP
+
–
AMP
+
–
AMP
+
–
ECG1_LA
ECG 2_LL
ECG3_RA
ECG4_V1
ECG5_V2
09660-016