EVAL-AD7747EBZ Analog Devices Inc, EVAL-AD7747EBZ Datasheet - Page 3

• 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

SPECIFICATIONS
V
Table 1.
Parameter
CAPACITIVE INPUT
CAPDAC
EXCITATION
TEMPERATURE SENSOR
VOLTAGE INPUT
DD
Conversion Input Range
Integral Nonlinearity (INL)
No Missing Codes
Resolution, p-p
Resolution Effective
Output Noise, rms
Absolute Error
Offset Error
System Offset Calibration Range
Offset Deviation over Temperature
Gain Error
Gain Drift vs. Temperature
Power Supply Rejection
Normal Mode Rejection
Full Range
Differential Nonlinearity (DNL)
Drift vs. Temperature
Frequency
AC Voltage Across Capacitance
Average DC Voltage Across Capacitance
Resolution
Error
Differential VIN Voltage Range
Absolute VIN Voltage
Integral Nonlinearity (INL)
No Missing Codes
Resolution, p-p
Output Noise
Offset Error
Offset Drift vs. Temperature
Full-Scale Error
Full-Scale Drift vs. Temperature
Average VIN Input Current
Analog VIN Input Current Drift
Power Supply Rejection
= 2.7 V to 3.6 V or 4.75 V to 5.25 V; GND = 0 V; EXC = ±V
2
6
4, 5
7
3
2, 9
2
2
7
2
2
2
5
2
2
5
2
Min
24
−23
17
GND − 0.03
24
Typ
±8.192
16.5
19.1
11.0
0.4
0.02
−26
0.5
72
60
21
0.3
26
16
±V
V
0.1
±0.5
±2
±V
±3
16
3
±3
15
0.025
5
0.5
300
±50
80
90
DD
DD
REF
Rev. 0 | Page 3 of 28
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× 3/8
DD
× 3/8; −40°C to +125°C, unless otherwise noted.
Max
±0.01
±10
32
±1
0.11
−29
4
±2
V
±15
0.1
DD
+ 0.03
Unit
pF
% of FSR
Bit
Bit
Bit
aF/√Hz
fF
aF
pF
fF
% of FS
ppm of FS/°C
fF/V
dB
dB
pF
LSB
ppm of FS/°C
kHz
V
V
°C
°C
°C
V
V
ppm of FS
Bit
Bits
μV rms
μV
nV/°C
% of FS
ppm of FS/°C Internal reference
ppm of FS/°C External reference
nA/V
pA/V/°C
dB
dB
1
1
1
1
1
Test Conditions/Comments
Conversion time ≥ 124 ms
Conversion time 124 ms, see Table 5
Conversion time 124 ms, see Table 5
50 Hz ± 1%, conversion time 124 ms
60 Hz ± 1%, conversion time 124 ms
See Figure 16
Internal temperature sensor
External sensing diode
V
Conversion time = 122.1 ms
Factory calibrated
Conversion time 124 ms, see Table 5
25°C, V
After system offset calibration,
excluding effect of noise
See Figure 6
25°C, V
6-bit CAPDAC
To be configured via digital interface
V
Conversion time = 62 ms,
see Table 6 and Table 7
Conversion time = 62 ms,
see Table 6 and Table 7
Internal reference, V
External reference, V
REF
REF
internal
internal or V
DD
DD
= 5 V, after offset calibration
= 5 V
REF
= 2.5 V
IN
IN
= V
= V
8
4
AD7747
REF
REF
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