AT42QT1012-TSHR Atmel, AT42QT1012-TSHR Datasheet - Page 21

• Manufacturer Part Number: AT42QT1012-TSHR
• Description: IC TOUCH SENSOR 1KEY SOT23-6
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of AT42QT1012-TSHR

• 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: SOT-23-6
• Output Type: Logic
• Interface: Digital
• Input Type: Logic
• Supply Voltage: 1.8 V to 5.5 V
• Dimensions: 2.9 mm L x 1.6 mm W x 1.45 mm H
• Output Voltage: 0.6 V to 0.7 V
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Supply Current: 31.5µA
• Supply Voltage Range: 1.8V To 5.5V
• Sensor Case Style: SOT-23
• No. Of Pins: 6
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: AT42QT1012-TSHRTR

4.5
9543D–AT42–08/10
Power On
Electrode trace routing: Keep the electrode trace (and the electrode itself) away from other
signal, power, and ground traces including over or next to ground planes. Adjacent switching
signals can induce noise onto the sensing signal; any adjacent trace or ground plane next to, or
under, the electrode trace will cause an increase in Cx load and desensitize the device.
Bypass Capacitor: Important – For proper operation a 100 nF (0.1 µF) ceramic bypass
capacitor must be used directly between Vdd and Vss, to prevent latch-up if there are
substantial Vdd transients; for example, during an ESD event. The bypass capacitor should be
placed very close to the Vss and Vdd pins.
On initial power up, the QT1012 requires approximately 250 ms to power on to allow power
supplies to stabilize. During this time the OUT pin state is not valid and should be ignored.
Note that recalibration takes approximately 200 ms, so the QT1012 takes approximately 450 ms
in total from initial power on to become active.
AT42QT1012
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