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AT42QT1011 Datasheet(PDF) 12 Page - ATMEL Corporation

Part # AT42QT1011
Description  One-channel Touch Sensor IC
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT1011 Datasheet(HTML) 12 Page - ATMEL Corporation

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12
9542G–AT42–03/10
AT42QT1011
5.
Specifications
5.1
Absolute Maximum Specifications
5.2
Recommended Operating Conditions
5.3
AC 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
VDD
+1.8 to 5.5V
Short-term supply ripple + noise
±20 mV
Long-term supply stability
±100 mV
Cs value
2 to 50 nF
Cx value
5 to 50 pF
Vdd = 3.0V, Cs = 4.7 nF, Cx = 5 pF, Ta = recommended range, unless otherwise noted
Parameter
Description
Min
Typ
Max
Units
Notes
TRC
Recalibration time
200
ms
Cs, Cx dependent
TPC
Charge duration
3.05
µs
±7.5% spread spectrum variation
TPT
Transfer duration
9.0
µs
±7.5% spread spectrum variation
TG1
Time between end of burst and
start of the next (Fast mode)
1.2
ms
TG2
Time between end of burst and
start of the next (LP mode)
80
ms
Increases with decreasing VDD
See Figure 5-1 on page 13
TBL
Burst length
2.45
ms
VDD, Cs and Cx dependent. See
Section 4.2 for capacitor selection.
TR
Response time
100
ms
THB
HeartBeat pulse width
15
µs


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