ADAS1000 Datasheet PDF - Analog Devices

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ADAS1000
Analog Devices

Part Number ADAS1000
Description Five Electrode Electrocardiogram (ECG) Analog Front End
Page 30 Pages


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Data Sheet
Low Power, Five Electrode
Electrocardiogram (ECG) Analog Front End
ADAS1000/ADAS1000-1/ADAS1000-2
FEATURES
Biopotential signals in; digitized signals out
5 acquisition (ECG) channels and one driven lead
Parallel ICs for up to 10+ electrode measurements
Master ADAS1000 or ADAS1000-1 used with slave
ADAS1000-2
AC and dc lead-off detection
Internal pace detection algorithm on 3 leads
Support for user’s own pace
Thoracic impedance measurement (internal/external path)
Selectable reference lead
Scalable noise vs. power control, power-down modes
Low power operation from
11 mW (1 lead), 15 mW (3 leads), 21 mW (all electrodes)
Lead or electrode data available
Supports AAMI EC11:1991/(R)2001/(R)2007, AAMI EC38
R2007, EC13:2002/(R)2007, IEC60601-1 ed. 3.0 b:2005,
IEC60601-2-25 ed. 2.0 :2011, IEC60601-2-27 ed. 2.0
b:2005, IEC60601-2-51 ed. 1.0 b: 2005
Fast overload recovery
Low or high speed data output rates
Serial interface SPI-/QSPI™-/DSP-compatible
56-lead LFCSP package (9 mm × 9 mm)
64-lead LQFP package (10 mm × 10 mm body size)
APPLICATIONS
ECG: monitor and diagnostic
Bedside patient monitoring, portable telemetry, Holter,
AED, cardiac defibrillators, ambulatory monitors, pace
maker programmer, patient transport, stress testing
GENERAL DESCRIPTION
The ADAS1000/ADAS1000-1/ADAS1000-2 measure electro
cardiac (ECG) signals, thoracic impedance, pacing artifacts,
and lead-on/lead-off status and output this information in the
form of a data frame supplying either lead/vector or electrode
data at programmable data rates. Its low power and small size
make it suitable for portable, battery-powered applications.
The high performance also makes it suitable for higher end
diagnostic machines.
The ADAS1000 is a full-featured, 5-channel ECG including
respiration and pace detection, while the ADAS1000-1 offers
only ECG channels with no respiration or pace features. Similarly,
the ADAS1000-2 is a subset of the main device and is configured
for gang purposes with only the ECG channels enabled (no
respiration, pace, or right leg drive).
The ADAS1000/ADAS1000-1/ADAS1000-2 are designed to
simplify the task of acquiring and ensuring quality ECG signals.
They provide a low power, small data acquisition system for
biopotential applications. Auxiliary features that aid in better
quality ECG signal acquisition include multichannel averaged
driven lead, selectable reference drive, fast overload recovery,
flexible respiration circuitry returning magnitude and phase
information, internal pace detection algorithm operating on
three leads, and the option of ac or dc lead-off detection. Several
digital output options ensure flexibility when monitoring and
analyzing signals. Value-added cardiac post processing is
executed externally on a DSP, microprocessor, or FPGA.
Because ECG systems span different applications, the
ADAS1000/ADAS1000-1/ADAS1000-2 feature a power/noise
scaling architecture where the noise can be reduced at the
expense of increasing power consumption. Signal acquisition
channels can be shut down to save power. Data rates can be
reduced to save power.
To ease manufacturing tests and development as well as offer
holistic power-up testing, the ADAS1000/ADAS1000-1/
ADAS1000-2 offer a suite of features, such as dc and ac test
excitation via the calibration DAC and cyclic redundancy check
(CRC) redundancy testing, in addition to readback of all
relevant register address space.
The input structure is a differential amplifier input, thereby
allowing users a variety of configuration options to best suit
their application.
The ADAS1000/ADAS1000-1/ADAS1000-2 are available in two
package options, a 56-lead LFCSP package and a 64-lead LQFP
package. Both packages are specified over a −40°C to +85°C
temperature range.
Rev. B
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