ADAS1000BCPZ datasheet(31/80 Pages) AD

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Data Sheet

ADAS1000/ADAS1000-1/ADAS1000-2

Figure 58. Electrode and Lead Configurations, Analog Lead Mode

Figure 59. Electrode and Lead Configurations, Digital Lead Mode

VCM = WCT = (LA + LL + RA)/3

COMMON-

MODE AMP

ECG1_LA

ECG2_LL

ECG3_RA

ECG4_V1

ECG5_V2

AMP

ADC

CM_IN

FOR EXAMPLE RA

COMMON

ELECTRODE CE IN

–

CM_OUT/WCT

LEAD I

(LA – RA)

LEAD III

(LL – LA)

LEAD II

(LL – RA)*

V1’ = V1 – WCT

V2’ = V2 – WCT

WCT = (LA + LL + RA)/3

*GETS MULITPLED

BY –1 IN DIGITAL

AMP

–

AMP

–

AMP

–

AMP

–

MODE

COMMENT

WORD1

WORD2

WORD3

WORD4

WORD5

ANALOG LEAD

LEAD I

(LA − RA)

LEAD II

(LL − RA)

LEAD III

(LL − LA)

V1’

(V1 − VCM)

V2’

(V2 − VCM)

ANALOG LEAD

0x0A

[4]1

0x01

[10]2

0x05

[8]3

1REGISTER FRMCTL, BIT DATAFMT: 0 = LEAD/VECTOR MODE; 1 = ELECTRODE MODE.

2REGISTER ECGCTL, BIT CHCONFIG: 0 = SINGLE ENDED INPUT (DIGITAL LEAD MODE OR ELECTRODE MODE); 1 = DIFFERENTIAL IN PUT (ANALOG LEAD MODE).

3REGISTER CMREFCTL, BIT CEREFEN: 0 = CE DISABLED; 1 = CE ENABLED.

COMMON-

MODE AMP

AMP

ADC

CM_IN

FOR EXAMPLE, RA

COMMON

ELECTRODE CE IN

–

CM_OUT/WCT

V1 – WCT

V2 – WCT

AMP

–

AMP

–

AMP

–

AMP

–

ECG1_LA

ECG 2_LL

ECG3_RA

ECG4_V1

ECG5_V2

LEAD I

LA – RA

LEAD II

LL – RA

LEAD III

LL – LA

VCM = WCT = (LA + LL + RA)/3

MODE

COMMENT

WORD1

WORD2

WORD3

WORD4

WORD5

LEAD I

(LA − RA)

LEAD II

(LL − RA)

LEAD III

(LL − LA)

V1’

(V1 − WCT4)

V2’

(V2 − WCT4)

SINGLE-ENDED

INPUT, DIGITALLY

CALCULATED LEADS

DIGITAL LEAD

0x0A

[4]1

0x01

[10]2

0x05

[8]3

1REGISTER FRMCTL, BIT DATAFMT: 0 = LEAD/VECTOR MODE; 1 = ELECTRODE MODE.

2REGISTER ECGCTL, BIT CHCONFIG: 0 = SINGLE ENDED INPUT (DIGITAL LEAD MODE OR ELECTRODE MODE); 1 = DIFFERENTIAL IN PUT (ANALOG LEAD MODE).

3REGISTER CMREFCTL, BIT CEREFEN: 0 = CE DISABLED; 1 = CE ENABLED.

4WILSON CENTRAL TERMINAL (WCT) = (RA + LA + LL)/3, THIS IS A DIGITALLY CALCULATED WCT BASED ON THE RA, LA, LL MEASUREMENTS.

DIGITAL DOMAIN

CALCULATIONS

Rev. B | Page 31 of 80

ADAS1000BCPZ Datasheet(PDF) 31 Page - Analog Devices

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