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ADAS1000-2

Low Power, Five Electrode Electrocardiogram (ECG) Analog Front End

Analog Devices 

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. C

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