at42qt2100 ATMEL Corporation, at42qt2100 Datasheet - Page 33

• Manufacturer Part Number: at42qt2100
• Description: Qtouch Touch Sensor Ic
• Manufacturer: ATMEL Corporation

6.6
6.7
6.8
Vdd = 5.0V, Cs keys = 4.7 nF, Cs slider/wheel = 15 nF; circuit of
6.9
6.9.1
9554CX–AT42–11/11
Parameter
Internal RC oscillator
Description
Detection threshold (keys)
Detection threshold (slider/wheel)
Detection hysteresis (keys)
Detection hysteresis (slider/wheel)
DI filter, start of touch, normal mode
DI filter, start of touch, fast DI mode
Parameter
V
RST
External Reset
Internal Resonator
Signal Processing
Power Consumption
Spread Spectrum Disabled
Description
Threshold voltage low (Activate)
Threshold voltage high (Release)
Table 6-1.
Note:
LP Mode
Sleep
0
1
2
3
4
Power measurements taken 4.7 nF capacitors on the keys and 15 nF capacitors on the slider
electrodes.
Power Consumption (µA)
Min
10
30
2
5
6
2
Operation
8 MHz with spread-spectrum modifier during measurement bursts, if enabled
Operation
0.2Vdd
0.9Vdd
950
190
2V
95
60
40
15
samples
samples
counts
counts
counts
counts
Figure 1-1
Units
Notes
Threshold for increase in Cx load
Changeable through SPI
25 percent of slider/wheel detection threshold.
Must be consecutive or detection fails
Must be consecutive or detection fails
1940
3.3V
420
205
120
80
18
Vdd
AT42QT2100
4350
1050
640
320
200
5V
22
33