EVAL-AD7747EBZ Analog Devices Inc, EVAL-AD7747EBZ Datasheet - Page 18

• 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

AD7747
CONFIGURATION REGISTER
Address Pointer 0x0A, Default Value 0xA0
Converter update rate and mode of operation setup.
Table 17. Configuration Register Bit Map
Bit
Mnemonic
Default
Table 18.
Bit
7
6
5
4
3
2
1
0
Mnemonic
VTFS1
VTFS0
CAPFS2
CAPFS1
CAPFS0
MD2
MD1
MD0
Description
Voltage/temperature channel digital filter setup—conversion time/update rate setup.
VTFS1
0
0
1
1
Capacitive channel digital filter setup—conversion time/update rate setup.
CAPFS2
0
0
0
0
1
1
1
1
Converter mode of operation setup.
MD2
0
0
0
0
1
1
1
1
Bit 7
VTFS1
0
CAPFS1
0
0
1
1
0
0
1
1
MD1
0
0
1
1
0
0
1
1
Bit 6
VTFS0
0
VTFS0
0
1
0
1
CAPFS0
0
1
0
1
0
1
0
1
MD0
0
1
0
1
0
1
0
1
Bit 5
CAPFS2
0
Rev. 0 | Page 18 of 28
Conversion Time (ms)
20.1
32.1
62.1
122.1
Conversion Time (ms)
22.0
23.9
40.0
76.0
124.0
154.0
184.0
219.3
Mode
Idle
Continuous conversion
Single conversion
Power-down
–
Capacitance system offset calibration
Capacitance or voltage system gain calibration
–
Bit 4
CAPFS1
0
Bit 3
CAPFS0
0
Update Rate (Hz)
49.8
31.2
16.1
8.2
Update Rate
45.5
41.9
25.0
13.2
8.1
6.5
5.5
4.6
VTCHOP = 1
Bit 2
MD2
0
−3 dB Frequency (Hz)
26.4
15.9
8.0
4.0
−3 dB Frequency (Hz)
43.6
39.5
21.8
10.9
6.9
5.3
4.4
4.0
Bit 1
MD1
0
Bit 0
MD0
0