紅外線觸控螢幕和電容式觸控螢幕在智慧辦公領域的主流會議平板電腦中，觸控技術主要有紅外線觸控技術和電容式觸控技術。那麼，這些不同觸控技術的原理是什麼呢？它們之間又有什麼差別呢？

TYPE	SMD5.0x3.2
Frequency range	6MHz~125MHz
Crystal cut and Mode	AT/FUND & 3rd Overtone
Frequency Tolerance(at25C)	±5ppm~±30ppm,or specify
Frequency Temperature Characteristics	±10ppm(-20℃-70℃); ±30ppm(-40℃-85℃)
Operating Temperature Range	-40℃~+125℃
Storage Time.Range	-55℃~+125℃
Equivalent Series Resistance(ESR)	See Table
Load Capacitance(CL)	6pf~∞
Shunt Capacitance(Co)	<5pf
Insulation Resistance	>500MΩ At DC 200V
Drive Level	10μw ~300μw
Aging(Year)	±3ppm(Year)

FREQUENCIES VS EQUIVALENT SERIES RESISTANCE

Frequency(MHz)	Mode	ESR(Ω)SMD5.0x3.2
6.000 ≤f	AT/FUND	≤500
6.000<f<20.000 <="" td="">	AT/FUND	≤ 80
20.000 ≤f<40.000	AT/FUND	≤ 40
40.000≤f<80.000	3rd Overtone	≤60
8.000 ≤f<12.000	AT/FUND
12.000≤f<20.000	AT/FUND
20.000≤f<30.000	AT/FUND
30.000≤f<54.000	AT/FUND
In addition to the parameters listed in the table, it can be designed according to customer needs