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ADAS1000-4

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

Analog Devices 

Data Sheet

Low Power, Three Electrode

Electrocardiogram (ECG) Analog Front End

ADAS1000-3/ADAS1000-4

FEATURES

Biopotential signals in; digitized signals out

3 acquisition (ECG) channels and one driven lead

Can be ganged for 8 electrode + RLD using master

ADAS1000 or ADAS1000-1

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)

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 ADAS1000-3/ADAS1000-4 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 ADAS1000-4 is a full-featured, 3-channel ECG including

respiration and pace detection, while the ADAS1000-3 offers

only ECG channels with no respiration or pace features.

The ADAS1000-3/ADAS1000-4 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 monitor-

ing and analyzing signals. Value-added cardiac post processing

is executed externally on a DSP, microprocessor, or FPGA.

Because ECG systems span different applications, the

ADAS1000-3/ADAS1000-4 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 ADAS1000-3/ADAS1000-4

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 ADAS1000-3/ADAS1000-4 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. B

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