Datasheet

Data Sheet ADAS1000-3/ADAS1000-4
Rev. A | Page 25 of 76
Figure 53. ADAS1000-4 Simplified Block Diagram
–
+
RLD_SJ
DRIVEN
LEAD
AMP
SHIELD
DRIVE
AMP
SHIELD
ECG1_LA
ECG2_LL
ECG3_RA
RLD_OUT CM_IN
VREF
REFOUT
XTAL1 XTAL2
PD
CS
SCLK
SDI
DGND
SDO
DRDY
RESET
AGND
IOVDD
CLOCK GEN/OSC/
EXTERNAL CLK
SOURCE
SYNC_GANG
REFIN CAL_DAC_IO
RESPIRATION PATH
EXT_RESP_LA
EXT_RESP_LL
DC LEAD-
OFF/MUXES
VCM_REF
(1.3V)
AC
LEAD-OFF
DAC
RESPIRATION
DAC
CALIBRATION
DAC
CLK_IO
AVDD
ADCVDD
DVDD
GPIO3
GPIO1/MSCLK
GPIO2/MSDO
GPIO0/MCS
AMP
AMP
ECG PATH
VREF
FILTERS,
CONTROL,
AND
INTERFACE
LOGIC
EXT_RESP_R
A
RESPDAC_LA
RESPDAC_LL
RESPDAC_RA
MUX
REFGND
CM_OUT/WCT
ADCVDD, DVDD
1.8V
REGULATORS
ADAS1000-4
10k
Ω
VCM
AMP
ADC
ADC
ADC
AMP
ADC
–
+
AC
LEAD-OFF
DETECTION
PACE
DETECTION
COMMON-
MODE AMP
10997-011