ADAS1000-4 Просмотр технического описания (PDF) - Analog Devices

Номер в каталоге

Компоненты Описание

производитель

ADAS1000-4

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

Analog Devices 

Data Sheet

Parameter

Min

RIGHT LEG DRIVE/DRIVEN LEAD

Output Voltage Range

0.2

RLD_OUT Short-Circuit Current −5

Closed-Loop Gain Range2

25

Slew Rate2

Input Referred Noise1

Amplifier GBP2

DC LEAD-OFF

Lead-Off Current Accuracy

High Threshold Level1

Low Threshold Level1

Threshold Accuracy

AC LEAD-OFF

Frequency Range

Lead-Off Current Accuracy

REFIN

Input Range2

1.76

Input Current

450

REFOUT

Output Voltage, VREF

Reference Tempco1

Output Impedance2

Short-Circuit Current1

Voltage Noise1

CALIBRATION DAC

DAC Resolution

Full-Scale Output Voltage

Zero-Scale Output Voltage

DNL

Output Series Resistance2

Input Current

CALIBRATION DAC TEST TONE

Output Voltage

Square Wave

Low Frequency Sine Wave

High Frequency Sine Wave

SHIELD DRIVER

Output Voltage Range

Gain

Offset Voltage

Short-Circuit Current

Stable Capacitive Load2

CRYSTAL OSCILLATOR

Frequency2

Start-Up Time2

1.785

2.64

0.24

−1

0.9

0.3

−20

Typ

±2

200

8

1.5

±10

2.4

0.2

25

2.039

±10

1.8

113

675

1.8

±10

0.1

4.5

33

17

10

2.7

0.3

10

±5

1

1

10

150

1

15

8.192

15

ADAS1000-3/ADAS1000-4

Max

Unit

AVDD − 0.2 V

+5

mA

V/V

mV/ms

μV p-p

MHz

%

V

V

mV

kHz

%

1.84

V

μA

950

μA

1.815

2.76

0.36

+1

1.1

2.3

+20

25

10

V

ppm/°C

Ω

mA

μV p-p

μV p-p

Bits

V

V

LSB

kΩ

nA

mV p-p

Hz

Hz

Hz

V

V/V

mV

μA

nF

MHz

ms

Test Conditions/Comments

External protection resistor required to meet

regulatory patient current limits; output shorted to

AVDD/AGND

0.05 Hz to 150 Hz

Internal current source, pulls up open ECG pins;

programmable in 10 nA steps: 10 nA to 70 nA

Of programmed value

Inputs are compared to threshold levels; if inputs

exceed levels, lead-off flag is raised

Programmable in 4 steps: 12.5 nA rms, 25 nA rms,

50 nA rms, 100 nA rms

Fixed frequency

Of programmed value, measured into low impedance

Channel gain scales directly with REFIN

Per active ADC

Three ECG channels and respiration enabled

On-chip reference voltage for ADC; not intended to

drive other components reference inputs directly,

must be buffered externally

Short circuit to ground

0.05 Hz to 150 Hz (ECG band)

0.05 Hz to 5 Hz (respiration)

Available on CAL_DAC_IO (output for master, input for

slave)

No load, nominal FS output is 1.5 × REFOUT

No load

Not intended to drive low impedance load, used for

slave CAL_DAC_IO configured as an input

When used as an input

Rides on common-mode voltage, VCM_REF = 1.3 V

Rides on common-mode voltage (VCM)

Output current limited by internal series resistance

Applied to XTAL1 and XTAL2

Internal startup

Rev. B | Page 7 of 80

Share Link: