ADAS1000-4BSTZ datasheet(67/80 Pages) AD

67 / 80 page

Data Sheet

ADAS1000-3/ADAS1000-4

Table 38. Filter Control Register (FILTCTL) Address 0x0B, Reset Value = 0x000000

Default

Bit

Name

Function

R/W

[23:6]

Reserved

Reserved, set to 0

R/W

MN2K

2 kHz notch bypass for SPI master

0 (default) = notch filter bypassed

1 = notch filter present

R/W

N2KBP

2 kHz notch bypass

0 (default) = notch filter present

1 = notch filter bypassed

R/W

[3:2]

LPF[1:0]

00 (default) = 40 Hz

01 = 150 Hz

10 = 250 Hz

11 = 450 Hz

R/W

[1:0]

Reserved

Reserved, set to 0

Table 39. AC Lead-Off Upper Threshold Register (LOFFUTH) Address 0x0C, Reset Value = 0x00FFFF

REE

Default

Bit

Name

Function

[23:20]

Reserved

Reserved, set to 0

R/W

[19:16]

ADCOVER[3:0]

ADC overrange threshold

An ADC out-of-range error is flagged if the ADC output is greater than the overrange

threshold; the overrange threshold is offset from the maximum value

Threshold = max_value – ADCOVER[3:0] × 26

0000 = maximum value (disabled)

0001 = max_value − 64

0010 = max_value − 128

…

1111 = max_value − 960

R/W

0xFFFF

[15:0]

LOFFUTH[15:0]

Applies to ac lead-off upper threshold only; lead-off is detected if the output is ≥ N ×

2 × VREF/gain/216

0 = 0 V

Table 40. AC Lead-Off Lower Threshold Register (LOFFLTH) Address 0x0D, Reset Value = 0x000000

REE

Default

Bit

Name

Function

[23:20]

Reserved

Reserved, set to 0

R/W

[19:16]

ADCUNDR[3:0]

ADC underrange threshold

An ADC out-of-range error is flagged if the ADC output is less than the underrange

threshold

Threshold = min_value + ADCUNDR[3:0] × 26

0000 = minimum value (disabled)

0001 = min_value + 64

0010 = min_value + 128

…

1111 = min_value + 960

R/W

[15:0]

LOFFLTH[15:0]

Applies to ac lead-off lower threshold only; lead-off is detected if the output is ≤ N ×

2 × VREF/GAIN/216

0 = 0 V

Rev. B | Page 67 of 80

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