45.10.10 PTC Characteristics
| Symbol | Mode | PTC channel | Max. | Units |
|---|---|---|---|---|
| Cload | Self-capacitance | Y0 | 18 | pF |
| Cload | Self-capacitance | Y1 | 25 | pF |
| Y2 | ||||
| Y3 | ||||
| Y4 | ||||
| Y5 | ||||
| Y6 | ||||
| Y7 | ||||
| Y8 | ||||
| Y9 | ||||
| Y10 | ||||
| Y11 | ||||
| Y12 | ||||
| Y13 | ||||
| Y14 | ||||
| Y15 | ||||
| Y16 | ||||
| Y17 | ||||
| Y18 | ||||
| Y19 | ||||
| Y20 | ||||
| Y21 | ||||
| Y22 | ||||
| Y23 | ||||
| Y24 | ||||
| Y25 | ||||
| Cload | Self-capacitance | Y26 | 22 | pF |
| Y27 | ||||
| Cload | Self-capacitance | Y28 | 25 | pF |
| Y29 | ||||
| Y30 | ||||
| Y31 | ||||
| Cload | Mutual-capacitance | All | 31 | pF |
Note:
- Capacitance load that the PTC circuitry can compensate for each channel.
| Symbol | Setting | Average |
|---|---|---|
| Gain | GAIN_1 | 1 |
| GAIN_2 | 2.1 | |
| GAIN_4 | 4.3 | |
| GAIN_8 | 9.9 | |
| GAIN_16 | - | |
| GAIN_32 | - |
Note:
- Analog Gain is a parameter of the QTouch Library. Refer to the QTouch Library Peripheral Touch Controller User Guide for more information.
- GAIN_16 and GAIN_32 settings are not recommended; otherwise, the PTC measurements might become unstable.