Datasheet

AD7142

Rev. A | Page 56 of 72

Table 47. STAGEX Detailed Offset Control Description (X = 0 to 11)

Data Bit

Default

Value

Type Name Description

[6:0] X R/W NEG_AFE_OFFSET Negative AFE offset setting (20 pF range)

1 LSB value = 0.16 pF of offset

[7] X R/W NEG_AFE_OFFSET_SWAP Negative AFE offset swap control

0 = NEG_AFE_OFFSET applied to CDC negative input

1 = NEG_AFE_OFFSET applied to CDC positive input

[14:8] X R/W POS_AFE_OFFSET Positive AFE offset setting (20 pF range)

1 LSB value = 0.16 pF of offset

[15] X R/W POS_AFE_OFFSET_SWAP Positive AFE offset swap control

0 = POS_AFE_OFFSET applied to CDC positive input

1 = POS_AFE_OFFSET applied to CDC negative input

Table 48. STAGEX Detailed Sensitivity Control Description (X = 0 to 11)

Data Bit

Default

Value

Type Name Description

[3:0] X R/W NEG_THRESHOLD_SENSITIVITY Negative threshold sensitivity control

0000 = 25%, 0001 = 29.73%, 0010 = 34.40%, 0011 = 39.08%

0100 = 43.79%, 0101 = 48.47%, 0110 = 53.15%

0111 = 57.83%, 1000 = 62.51%, 1001 = 67.22%

1010 = 71.90%, 1011 = 76.58%, 1100 = 81.28%

1101 = 85.96%, 1110 = 90.64%, 1111 = 95.32%

[6:4] X R/W NEG_PEAK_DETECT Negative peak detect setting

000 = 40% level, 001 = 50% level, 010 = 60% level

011 = 70% level, 100 = 80% level, 101 = 90% level

[7] X R/W Unused Set unused register bits = 0

[11:8] X R/W POS_THRESHOLD_SENSITIVITY Positive threshold sensitivity control