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STMPE16M31 数据表(PDF) 8 Page - STMicroelectronics |
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STMPE16M31 数据表(HTML) 8 Page - STMicroelectronics |
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8 / 85 page  Pin assignment STMPE16M31, STMPE24M31 8/85 Doc ID 16174 Rev 4 Figure 4. Sample application - notebook multimedia bar Table 3. Limitations on intrinsic capacitance on PCB / flexi PCB(1) 1. For small PCBs, it is possible to operate the device with CRef left unconnected. However, without a small capacitance at this pin, the capacitive sensing operation tends to be noisier. It is recommended that a capacitor of 10 pF to be connected to this pin. Cmax-Cmin (Difference between highest and lowest channel capacitance) Cmax Matching capacitors < 30 pF < 30 pF Not required <3 0 pF > 30 pF, < 60 pF Cref of up to 30 pF required >30pF, <60pF > 30 pF, <60 pF Cref of up to 30 pF required Channel matching capacitance of up to 25 pF required > 60 pF > 60 pF PCB optimization required Obsolete Product(s) - Obsolete Product(s) |
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