AD7143 Analog Devices, AD7143 Datasheet - Page 46

• Manufacturer Part Number: AD7143
• Description: Programmable Controller for Capacitance Touch Sensors
• Manufacturer: Analog Devices

Specifications of AD7143

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: n/a
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: n/a
• Ain Range: ± 2 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

AD7143
Table 39. STAGEX Detailed CIN7 Connection Setup Description
Data Bit
[1:0]
[13:2]
[14]
[15]
Table 40. STAGEX Detailed Offset Control Description (X = 0 to 7)
Data Bit
[6:0]
[7]
[14:8]
[15]
Table 41. STAGEX Detailed Sensitivity Control Description (X = 0 to 7)
Data Bit
[3:0]
[6:4]
[7]
[11:8]
[14:12]
[15]
Default
X
X
X
X
Default
X
X
X
X
Default
X
X
X
X
X
X
Type
R/W
R/W
R/W
R/W
Type
R/W
R/W
R/W
R/W
Type
R/W
R/W
R/W
R/W
R/W
R/W
Name
NEG_AFE_OFFSET
NEG_AFE_OFFSET_SWAP
POS_AFE_OFFSET
POS_AFE_OFFSET_SWAP
Name
NEG_THRESHOLD_SENSITIVITY
NEG_PEAK_DETECT
Unused
POS_THRESHOLD_SENSITIVITY
POS_PEAK_DETECT
Unused
Name
CIN7_CONNECTION_SETUP
Unused
NEG_AFE_OFFSET_DISABLE
POS_AFE_OFFSET_DISABLE
Rev. 0 | Page 46 of 56
Description
CIN7 connection setup
Negative AFE offset enable control
Positive AFE offset enable control
0 = enable
1 = disable
0 = enable
1 = disable
Description
Negative AFE offset setting (20 pF range)
Negative AFE offset swap control
Positive AFE offset setting (20 pF range)
Positive AFE offset swap control
Description
Negative threshold sensitivity control
Negative peak detect setting
Positive threshold sensitivity control
Positive peak detect setting
00 = CIN7 not connected to CDC inputs
01 = CIN7 connected to CDC negative input
10 = CIN7 connected to CDC positive input
11 = CIN7 connected to BIAS (connect unused CIN inputs)
1 LSB value = 0.16 pF of offset
0 = NEG_AFE_OFFSET applied to CDC negative input
1 = NEG_AFE_OFFSET applied to CDC positive input
1 LSB value = 0.16 pF of offset
0 = POS_AFE_OFFSET applied to CDC positive input
1 = POS_AFE_OFFSET applied to CDC negative input
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%
000 = 40% level, 001 = 50% level, 010 = 60% level
011 = 70% level, 100 = 80% level, 101 = 90% level
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%
000 = 40% level, 001 = 50% level, 010 = 60% level
011 = 70% level, 100 = 80% level, 101 = 90% level