ADAS1000BSTZ Datasheet, PDF (1/80 Pages) Analog Devices – Low Power, Five Electrode trocardiogram (ECG) Analog Front End

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/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 may 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 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: either a 56-lead LFCSP or a 64-lead
LQFP package; they are specified over −40°C to +85°C
temperature range.
Rev. A
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