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AD7143 Scheda tecnica(PDF) 9 Page - Analog Devices

Il numero della parte AD7143
Spiegazioni elettronici  Programmable Controller for Capacitance Touch Sensors
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

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AD7143
Rev. 0 | Page 8 of 56
TYPICAL PERFORMANCE CHARACTERISTICS
VCC (V)
820
860
840
920
900
880
940
960
980
1000
2.7
2.9
2.8
3.0
3.1
3.2
3.3
3.4
3.5
3.6
DEVICE 3
DEVICE 1
DEVICE 2
Figure 4. Supply Current vs. Supply Voltage
2.72.82.93.03.13.2
3.4
3.3
3.5
3.6
VCC (V)
40
60
100
80
120
140
160
180
LP_CONV_DELAY = 200ms
LP_CONV_DELAY = 400ms
LP_CONV_DELAY = 600ms
LP_CONV_DELAY = 800ms
Figure 5. Low Power Supply Current vs. Supply Voltage,
Decimation Rate = 256
2.7
2.8
2.9
3.0
3.1
3.2
3.4
3.3
3.5
3.6
VCC (V)
20
40
60
80
100
120
LP_CONV_DELAY = 200ms
LP_CONV_DELAY = 600ms
LP_CONV_DELAY = 800ms
LP_CONV_DELAY = 400ms
Figure 6. Low Power Supply Current vs. Supply Voltage
Decimation Rate = 128
1.40
1.55
1.70
1.85
2.00
2.15
2.30
2.45
2.7
2.9
2.8
3.0
3.13.23.33.43.53.6
VCC (V)
DEVICE 2
DEVICE 3
DEVICE 1
Figure 7. Shutdown Supply Current vs. Supply Voltage
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0
50
100
150
200
250
300
350
400
450
500
CAPACITANCE LOAD ON SOURCE (pF)
DEVICE 3
DEVICE 2
DEVICE 1
Figure 8. Supply Current vs. Capacitive Load on SRC
16015
16010
16005
16000
15995
15990
15985
15980
0
50
100
150
200
250
300
350
400
450
500
CAPACITANCE LOAD ON SOURCE (pF)
DEVICE 3
DEVICE 2
DEVICE 1
Figure 9. Output Code vs. Capacitive Load on SRC


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