AD7142 Analog Devices, AD7142 Datasheet - Page 11

• Manufacturer Part Number: AD7142
• Description: Programmable Controller for Capacitance Touch Sensors
• Manufacturer: Analog Devices

Specifications of AD7142

• Resolution (bits): 16bit
• # Chan: 14
• Sample Rate: 250kSPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: ± 2 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

Figure 14. Supply Current vs. Temperature (Supply Current = AI
12
10
960
940
920
900
880
860
840
820
800
780
8
6
4
2
0
–40
–40
Figure 15. Shutdown Supply Current vs. Temperature
–20
–20
(Supply Current = AI
0
0
TEMPERATURE (°C)
20
TEMPERATURE (°C)
20
40
40
CC
+ DI
60
60
3.3V
CC
3.6V
3.3V
2.7V
)
3.6V
80
80
2.7V
100
100
CC
+ DI
120
120
CC
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)
180
160
140
120
100
2.5
2.0
1.5
1.0
0.5
80
60
40
20
0
0
100
10
Figure 17. Power Supply Square Wave Rejection
Figure 16. Power Supply Sine Wave Rejection
1k
SQUARE WAVE FREQUENCY (Hz)
1k
FREQUENCY (Hz)
10k
100mV
200mV
100k
100k
300mV
400mV
500mV
1M
200mV
AD7142
300mV
100mV
50mV
25mV
10M
10M