AT42QT1010 Datasheet, PDF (12/20 Pages) ATMEL Corporation – One-channel Touch Sensor IC

5. Specifications
5.1 Absolute Maximum Specifications
Operating temperature
-40°C to +85°C
Storage temperature
-55°C to +125°C
VDD
0 to +6.5V
Max continuous pin current, any control or drive pin
±20 mA
Short circuit duration to Vss, any pin
Infinite
Short circuit duration to Vdd, any pin
Infinite
Voltage forced onto any pin
-0.6V to (VDD + 0.6) Volts
CAUTION: Stresses beyond those listed under Absolute Maximum Specifications may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at these or other conditions beyond those
indicated in the operational sections of this specification is not implied. Exposure to absolute maximum specification
conditions for extended periods may affect device reliability
5.2 Recommended Operating Conditions
VDD
Short-term supply ripple + noise
Long-term supply stability
Cs value
Cx value
+1.8 to 5.5V
±20 mV
±100 mV
2 to 50 nF
5 to 50 pF
5.3 AC Specifications
Vdd = 3.0V, Cs = 4.7 nF, Cx = 5 pF, Ta = recommended range, unless otherwise noted
Parameter
Description
Min
Typ
Max
Units
TRC
Recalibration time
200
ms
TPC
Charge duration
3.05
µs
TPT
Transfer duration
9.0
µs
Time between end of burst and
TG1
start of the next (Fast mode)
1.2
ms
Time between end of burst and
TG2
start of the next (LP mode)
80
ms
TBL
Burst length
2.45
ms
TR
Response time
THB
HeartBeat pulse width
100
ms
15
µs
Notes
Cs, Cx dependent
±7.5% spread spectrum variation
±7.5% spread spectrum variation
Increases with decreasing VDD
See Figure 5-1 on page 13
VDD, Cs and Cx dependent. See
Section 4.2 for capacitor selection.
12 AT42QT1010
9541G–AT42–03/10