ADAS1000 datasheet(69/80 Pages) AD

69 / 80 page

Data Sheet

ADAS1000/ADAS1000-1/ADAS1000-2

Table 47. Lead-Off Status Register (LOFF) Address 0x1D, Reset Value = 0x000000

R/W

Default

Bit

Name

Function

RLD lead-off status

Electrode connection status.

LA lead-off status

If either dc or ac lead-off is enabled, these bits are the corresponding lead-off status. If

both dc and ac lead-off are enabled, these bits reflect only the ac lead-off status. DC

lead-off is available in the DCLEAD-OFF register (see Table 48).

LL lead-off status

RA lead-off status

V1 lead-off status

The common electrodes have only dc lead-off detection.

V2 lead-off status

An ac lead-off signal can be injected into the common electrode, but there is no ADC

input to measure its amplitude. If the common electrode is off, it affects the ac lead-off

amplitude of the other electrodes.

CELO

These bits accumulate in the frame buffer and are cleared when the frame buffer is

loaded into the SPI buffer.

0 = electrode is connected.

1 = electrode is disconnected.

RLD lead-off is not detected in ac lead-off.

[17:14]

Reserved

Reserved.

LAADCOR

ADC out of range error.

LLADCOR

These status bits indicate the resulting ADC code is out of range.

RAADCOR

These bits accumulate in the frame buffer and are cleared when the frame buffer is

loaded into the SPI buffer.

V1ADCOR

V2ADCOR

[7:0]

Reserved

Reserved.

Table 48. DC Lead-Off Register (DCLEAD-OFF) Address 0x1E, Reset Value = 0x0000001

R/W

Default

Bit

Name

Function

RLD input

overrange

The dc lead-off detection is comparator based and compares to a fixed level. Individual

electrode bits flag indicate if the dc lead-off comparator threshold level has been exceeded.

LA input overrange

0 = electrode < overrange threshold, 2.4 V.

LL input overrange

1 = electrode > overrange threshold, 2.4 V.

RA input

overrange

V1 input overrange

V2 input overrange

CE input overrange

[17:14]

[6:3]

Reserved

Reserved.

RLD input

underrange

The dc lead-off detection is comparator based and compares to a fixed level. Individual

electrode bits indicate if the dc lead-off comparator threshold level has been exceeded.

LA input

underrange

0 = electrode > underrange threshold, 0.2 V.

LL input

underrange

1 = electrode < underrange threshold, 0.2 V.

RA input

underrange

V1 input overrange

V2 input overrange

CE input

underrange

[1:0]

Reserved

This register is not part of framing data, but can be read by issuing a register read command of this address.

Rev. B | Page 69 of 80

ADAS1000 Datasheet(PDF) 69 Page - Analog Devices

ADAS1000 Datasheet(HTML) 69 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Datasheet Download

Link URL