AT42QT1012-MAH Atmel, AT42QT1012-MAH Datasheet - Page 7

• Manufacturer Part Number: AT42QT1012-MAH
• Description: IC SENSR TOUCH/PROX 1CH SOT23-8
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of AT42QT1012-MAH

• Touch Panel Interface: 1, 2-Wire
• Number Of Inputs/keys: 1 Key
• Resolution (bits): 9, 14 b
• Data Interface: Serial
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-UFDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3. Operation Specifics
3.1
3.1.1
3.1.2
9543D–AT42–08/10
Acquisition Modes
Introduction
OUT Pin
The OUT pin of the QT1012 can be configured to be active high or active low.
The QT1012 runs in Low Power (LP) mode. In this mode it sleeps for approximately 80 ms at the
end of each burst, saving power but slowing response. On detecting a possible key touch, it
temporarily switches to fast mode until either the key touch is confirmed or found to be spurious
(via the detect integration process).
Figure 3-1.
Figure 3-2.
• If active high then:
• If active low then:
• If the touch is confirmed, the OUT pin is toggled and the QT1012 returns to LP mode (see
• If the touch is not valid then the chip returns to LP mode but the OUT pin remains unchanged
SNSK
Figure
(see
OUT
– “on” is high
– “off” is low
– “on” is low
– “off” is high
Figure 3-2 on page
3-1).
SNSK
OUT
Low Power Mode: Touch Confirmed (Output in Off Condition)
Low Power Mode: Touch Denied (Output in Off Condition)
~80 ms
Sleep
~80 ms
Sleep
7).
Sleep
Sleep
Fast detect
integrator
Fast detect
integrator
Sleep
AT42QT1012
Sleep
Sleep
7