Datasheet
Table 37-62. Analog Gain Settings
Symbol Setting Average
Gain
GAIN_1 1.0
GAIN_2 2.0
GAIN_4 3.8
GAIN_8 8.0
GAIN_16 12.4
GAIN_32 -
Note:
1. Analog Gain is a parameter of the QTouch Library. Refer to the QTouch Library Peripheral Touch
Controller User Guide.
2. GAIN_16 and GAIN_32 settings are not recommended, otherwise the PTC measurements might
get unstable.
The values in the Power Consumption table below are measured values of power consumption under the
following conditions:
Operating conditions
VDD = 3.3 V
Clocks
OSC8M used as main clock source, running undivided at 8MHz
CPU is running on flash with 0 wait states, at 8MHz
PTC running at 4MHz
PTC configuration
Mutual-capacitance mode
One touch channel
System configuration
Standby sleep mode enabled
RTC running on OSCULP32K: used to define the PTC scan rate, through the event system
Drift Calibration disabled: no interrupts, PTC scans are performed in standby mode
Drift Calibration enabled: RTC interrupts (wakeup) the CPU to perform PTC scans. PTC drift calibration is
performed every 1.5 sec.
SAM D21 Family
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 1030