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TTP223 bảng dữ liệu(PDF) 4 Page - TT Electronics. |
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TTP223 bảng dữ liệu(HTML) 4 Page - TT Electronics. |
4 / 11 page Preliminary TTP223 08’/04/07 Page 4 of 11 Ver :1.0 FUNCTION DESCRIPTION 1. Sensitivity adjustment The total loading of electrode size and capacitance of connecting line on PCB can affect the sensitivity. So the sensitivity adjustment must according to the practical application on PCB. The TTP223 offers some methods for adjusting the sensitivity outside. 1-1 by the electrode size Under other conditions are fixed. Using a larger electrode size can increase sensitivity. Otherwise it can decrease sensitivity. But the electrode size must use in the effective scope. 1-2 by the panel thickness Under other conditions are fixed. Using a thinner panel can increase sensitivity. Otherwise it can decrease sensitivity. But the panel thickness must be below the maximum value. 1-3 by the value of Cs (please see the down figure) Under other conditions are fixed. When do not use the Cs to VSS, the sensitivity is most sensitive. When adding the values of Cs will reduce sensitivity in the useful range (0≦Cs≦50pF). RST SLRFTB LPMB MOTB AHLB TOG OPDO Q ELECTRODE Cs I VSS VDD VDD 2. Output mode The TTP223 has direct mode active high or low by AHLB pad option. And has toggle mode by TOG pad option. Another has open drain mode by bonding option. Pad Q is digital output, pad OPDO is open drain output. TOG AHLB Pad Q option features Pad OPDO option features 0 0 Direct mode, CMOS active high output Direct mode, Open drain active high output 0 1 Direct mode, CMOS active low output Direct mode, Open drain active low output 1 0 Toggle mode, Power on state=0 Toggle mode, Power on state high-Z, Active high 1 1 Toggle mode, Power on state=1 Toggle mode, Power on state high-Z, Active low |
Số phần tương tự - TTP223 |
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Mô tả tương tự - TTP223 |
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