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ADAS1000BSTZ датащи(PDF) 25 Page - Analog Devices

номер детали ADAS1000BSTZ
подробное описание детали  Low Power, Five Electrode Electrocardiogram (ECG) Analog Front End
PDF  80 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADAS1000BSTZ датащи(HTML) 25 Page - Analog Devices

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Data Sheet
ADAS1000/ADAS1000-1/ADAS1000-2
APPLICATIONS INFORMATION
OVERVIEW
The ADAS1000/ADAS1000-1/ADAS1000-2 are electro cardiac
(ECG) front-end solutions targeted at a variety of medical appli-
cations. In addition to ECG measurements, the ADAS1000 version
also measures thoracic impedance (respiration) and detects
pacing artifacts, providing all the measured information to the
host controller in the form of a data frame supplying either
lead/vector or electrode data at programmable data rates. The
ADAS1000/ADAS1000-1/ADAS1000-2 are designed to simplify
the task of acquiring ECG signals for use in both monitor and
diagnostic applications. Value-added cardiac post processing
can be executed externally on a DSP, microprocessor, or FPGA.
The ADAS1000/ADAS1000-1/ADAS1000-2 are designed for
operation in both low power, portable telemetry applications
and line powered systems; therefore, the parts offer power/noise
scaling to ensure suitability to these varying requirements.
The devices also offer a suite of dc and ac test excitation via
a calibration DAC feature and CRC redundancy checks in
addition to readback of all relevant register address space.
Figure 53. ADAS1000 Simplified Block Diagram
–
+
RLD_SJ
DRIVEN
LEAD
AMP
SHIELD
DRIVE
AMP
SHIELD
ECG1_LA
ECG2_LL
ECG3_RA
ECG4_V1
ECG5_V2
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_RA
RESPDAC_LA
RESPDAC_LL
RESPDAC_RA
MUX
REFGND
CM_OUT/WCT
ADCVDD, DVDD
1.8V
REGULATORS
ADAS1000
VCM
AMP
ADC
ADC
ADC
AMP
ADC
AMP
ADC
AMP
ADC
–
+
AC
LEAD-OFF
DETECTION
PACE
DETECTION
COMMON-
MODE AMP
Rev. B | Page 25 of 80



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