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AD7879 Datasheet(PDF) 9 Page - Analog Devices

Part # AD7879
Description  Low Voltage Controller for Touch Screens
PDF  36 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7879 Datasheet(HTML) 9 Page - Analog Devices

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AD7879
Rev. 0 | Page 9 of 36
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
1
501
1001
1501
2001
2501
3001
3501
4001
CODE
Figure 15. ADC DNL Plot
7
6
5
4
3
2
1
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
VCC (V)
X+ TO VCC
Y+ TO VCC
X– TO GND
Y– TO GND
Figure 16. Switch On Resistance vs. VCC
(X+, Y+: VCC to Pin; X−, Y−: Pin to GND)
6.0
5.5
5.0
4.5
4.0
3.5
3.0
–40
–25
–10
10
25
40
55
70
85
TEMPERATURE (°C)
X+ TO VCC
X– TO GND
Y+ TO VCC
Y– TO GND
Figure 17 Switch On Resistance vs. Temperature
(X+, Y+: VCC to Pin; X−, Y−: Pin to GND)
2370
2369
2368
2367
2366
2365
2364
2363
2362
2361
2360
–40 –25 –15
–5
5
15
25
35
45
55
65
TEMPERATURE (°C)
75
85
Figure 18. ADC Code vs. Temperature (Fixed Analog Input)



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