EVAL-AD7747EBZ Analog Devices Inc, EVAL-AD7747EBZ Datasheet - Page 17

• Manufacturer Part Number: EVAL-AD7747EBZ
• Description: 24-Bit Capacitance-to-Digital Converter Eval. Board
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7747EBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Capacitance-to-Digital Converter
• Kit Application Type: Data Converter
• Silicon Core Number: AD7747
• Sensor Type: Touch, Capacitive
• Interface: I²C
• Voltage - Supply: 2.7 V ~ 5.25 V
• Embedded: No
• Utilized Ic / Part: AD7747
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

EXC SETUP REGISTER
Address Pointer 0x09, Default Value 0x03
Capacitive channel excitation setup.
Table 15. EXC Setup Bit Map
Bit
Mnemonic
Default
Table 16.
Bit
7 to 4
3
2
1
0
Mnemonic
–
EXCDAC
EXCEN
EXCLVL1,
EXCLVL0
Description
These bits must be 0 for proper operation.
CAPDAC excitation. This bit must be set to 1 for the proper capacitive channel operation.
CIN and AC SHLD excitation. This bit must be set to 1 for the proper capacitive channel operation.
Excitation Voltage Level. Must be set to ±V
EXCLVL1
0
0
1
1
Bit 7
–
0
Bit 6
–
0
EXCLVL0
0
1
0
1
Bit 5
–
0
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Voltage on Cap
±V
±V
±V
±V
DD
DD
DD
DD
/8
/4
/2
× 3/8
DD
Bit 4
0
–
× 3/8 to allow operation for specified performance.
Bit 3
EXCDAC
0
EXC Low Level
V
V
V
0
DD
DD
DD
× 3/8
× 1/4
× 1/8
Bit 2
EXCEN
0
Bit 1
EXCLVL1
1
EXC High Level
V
V
V
V
DD
DD
DD
DD
× 5/8
× 3/4
× 7/8
Bit 0
EXCLVL0
1
AD7747