AT42QT1012-MAH Atmel, AT42QT1012-MAH Datasheet - Page 10

• 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

3.9
10
Output Polarity Selection
AT42QT1012
The output (OUT pin) of the QT1012 can be configured to have an active high or active low
output by means of the output configuration resistor Rop. The resistor is connected between the
output and either Vss or Vdd (see
Figure 3-4.
Table 3-1.
Note that some devices such as Digital Transistors have an internal biasing network that will
naturally pull the OUT pin to its inactive state. If these are being used then the resistor Rop is not
required (see
Figure 3-5.
Name (Vop)
Vss
Vdd
Figure
Output Polarity (6-pin SOT23)
Output Configuration
Output Connected to Digital Transistor (6-pin SOT23)
3-5).
ELECTRODE
ELECTRODE
SENSE
SENSE
Function (Output Polarity)
RS
CS
RS
Rm
CS
Rm
Figure 3-4
3
4
3
4
SNSK
SNS
SNSK
SNS
Active high
Active low
VDD
VDD
VDD
VDD
VSS
VSS
5
2
5
2
and
TIME
TIME
OUT
OUT
Table
Cby
100 nF
Cby
100 nF
1
6
1
6
3-1). A typical value for Rop is 100 k.
Rop
Load
Vop
9543D–AT42–08/10