EVAL-AD7747EBZ Analog Devices Inc, EVAL-AD7747EBZ Datasheet - Page 9
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EVAL-AD7747EBZ
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EVAL-AD7747EBZ
Manufacturer:
Analog Devices Inc
Quantity:
135
Figure 11. Capacitance Input Error vs. Resistance Between CIN1(+) and SHLD;
Figure 12. Capacitance Input Error vs. Resistance Between CIN(+) and SHLD;
–1000
–1000
–100
–150
–100
–200
–300
–400
–500
–600
–700
–800
–900
–100
–200
–300
–400
–500
–600
–700
–800
–900
150
100
–50
100
50
Figure 10. Capacitance Input Error vs. Parallel Resistance;
0.091
0
0
0
0
0
25
0.27
CIN(+) to GND = 25 pF, V
CIN(+) to GND = 8 pF, V
CIN(+) to GND = 8 pF, V
50
CIN TO SHLD RESISTANCE (MΩ)
CIN TO SHLD RESISTANCE (kΩ)
PARALLEL RESISTANCE (MΩ)
0.48
10
75
0.96
100
DD
125
DD
DD
5
= 5 V
= 5 V
100
= 5 V
150
25
175
100
200
1k
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Figure 13. Capacitance Input Error vs. Resistance Between SHLD and GND;
–100
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–10
–20
–30
–40
–50
–60
–70
–80
–90
0.8
0.6
0.4
0.2
Figure 15. Capacitance Input Power Supply Rejection (PSR);
1.0
0.2
10
0
0
0.01
0
Figure 14. Capacitance Input Error vs. Serial Resistance;
2.5
1
CIN(+) to GND = 8 pF and 25pF, V
3.0
CIN(+) to GND = 8 pF; V
0.1
SHLD TO GND RESISTANCE (MΩ)
CIN(+) to GND = 8 pF
SERIAL RESISTANCE (kΩ)
3.5
VDD (V)
1.0
4.0
10
DD
= 5 V
4.5
25 pF
DD
10.0
= 5 V
5.0
AD7747
8 pF
100
100
5.5