ADAS1000BSTZ datasheet(65/80 Pages) AD

65 / 80 page

Data Sheet

ADAS1000/ADAS1000-1/ADAS1000-2

Rev. A | Page 65 of 80

Table 39. Pace Edge Threshold Register (PACEEDGETH) Address 0x0E, Reset Value = 0x0000001

R/W

Default

Bit

Name

Function

R/W

[23:16]

PACE3EDGTH

Pace edge trigger threshold

0 = PACEAMPTH/2

1 = VREF/GAIN/216

N = N × VREF/GAIN/216

R/W

[15:8]

PACE2EDGTH

R/W

[7:0]

PACE1EDGTH

ADAS1000 model only, ADAS1000-1/ADAS1000-2 models do not contain these features.

Table 40. Pace Level Threshold Register (PACELVLTH) Address 0x0F, Reset Value = 0x0000001

R/W

Default

Bit

Name

Function

R/W

[23:16]

PACE3LVLTH[7:0]

Pace level threshold; This is a signed value

−1 = 0xFF = −VREF/GAIN/216

0 = 0x00 = 0 V

+1 = 0x01 = +VREF/GAIN/216

N = N × VREF/GAIN/216

R/W

[15:8]

PACE2LVLTH[7:0]

R/W

[7:0]

PACE1LVLTH[7:0]

ADAS1000 model only, ADAS1000-1/ADAS1000-2 models do not contain these features.

Table 41. Read Electrode/Lead Data Registers (Electrode/Lead) Address 0x11 to 0x15, Reset Value = 0x0000001

R/W

Default

Bit

Name

Function

[31:24]

Address [7:0]

0x11: LA or Lead I.

0x12: LL or Lead II.

0x13: RA or Lead III.

0x14: V1 or V1’.

0x15: V2 or V2’.

[23:0]

ECG data

Channel data value. Data left justified (MSB) irrespective of data rate.

In electrode format, the value is an unsigned integer.

In vector format, the value is a signed two’s complement integer format.

Lead/Vector format has a 2× range compared to electrode format because it can swing

from +VREF to –VREF; therefore, the LSB size is doubled.

Electrode format and Analog Lead Format:

Minimum value (000…) = 0 V

Maximum value (1111….) = VREF/GAIN

LSB = (2 × VREF/GAIN)/(2N– 1)

Digital Lead format:

Minimum value (1000…) = −(VREF/GAIN)

Maximum value (0111….) = +VREF/GAIN

LSB = 4 × (VREF/GAIN)/(2N – 1)

where N = number of data bits: 16 for 128 kHz data rate or 24 for 2 kHz/16 kHz data rate.

If using 128 kHz data rate in frame mode, only the upper 16 bits are sent. If using the 128 kHz data rate in regular read/write mode, all 32 bits are sent.

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