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AD7873 Datasheet(PDF) 12 Page - Analog Devices

Part # AD7873
Description  Touch Screen Digitizer
PDF  29 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7873 Datasheet(HTML) 12 Page - Analog Devices

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Data Sheet
AD7873
Rev. F | Page 11 of 28
Figure 17. Internal VREF vs. +VCC
Figure 18. Temp Diode Voltage vs. Temperature (2.7 V Supply)
Figure 19. TEMP1 Diode Voltage vs. VSUPPLY (25°C)
Figure 20. Internal VREF vs. Turn-on Time
Figure 21. TEMP0 Diode Voltage vs. VSUPPLY (25°C)
Figure 22. Auxiliary Channel Dynamic Performance
(fSAMPLE =125 kHz, fINPUT = 15 kHz)
2.484
2.486
2.488
2.490
2.492
2.494
2.496
2.498
2.500
2.502
2.504
2.9
3.1
2.5
2.7
3.3
3.5
3.7
+VCC (V)
–40
–30 –20 –10
0
10
20
30
40
50
60
70
80
450
500
550
600
650
700
750
800
850
TEMPERATURE (°C)
95.95mV
TEMP1
TEMP0
142.15mV
720
721
722
723
724
725
726
727
728
729
730
VSUPPLY (V)
2.7
3.3
3.0
3.6
TURN-ON TIME (µs)
0
1
2
3
4
5
0
200
400
600
800
1000
1200
1400
1600
1800
NO CAP (7µs)
SETTLING TIME
1µF CAP (1800µs)
SETTLING TIME
600
601
602
603
604
605
606
607
608
609
610
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
VSUPPLY (V)
120
100
80
60
40
20
0
30.0
22.5
7.5
15.0
0
37.5
45.0
52.5
60.0
FREQUENCY (kHz)
fSAMPLE = 125kHz
fIN = 15kHz
SNR = 68.34dB



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