QT1103-ISG Atmel, QT1103-ISG Datasheet - Page 4

• Manufacturer Part Number: QT1103-ISG
• Description: IC SENSOR QTOUCH 10CH 32QFN
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of QT1103-ISG

• Touch Panel Interface: 1, 2-Wire
• Number Of Inputs/keys: 10 Key
• Resolution (bits): 8 b
• Data Interface: Serial
• Data Rate/sampling Rate (sps, Bps): 38.4k
• Voltage Reference: *
• Voltage - Supply: 2.8 V ~ 5 V
• Current - Supply: 8mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Output Type: Logic
• Interface: RS-232
• Input Type: Logic
• For Use With: 427-1134 - EVAL BOARD FOR QT1103
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 427-1129-2

1.2.10 Adjacent Key Suppression (AKS™)
AKS™ is a Quantum-patented feature that can be enabled
via a resistor strap option. AKS works to prevent multiple
keys from responding to a single touch, a common complaint
about capacitive touch panels. This can happen with closely
spaced keys, or with control surfaces that have water films on
them.
AKS operates by comparing signal strengths from keys within
a group of keys to suppress touch detections from those that
have a weaker signal change than the dominant one.
The QT1103 has two different AKS groupings of keys,
selectable via option resistors. These groupings are:
These two modes allow the designer to provide AKS while
also providing for shift or function operations.
Lq
•
•
AKS operates in three groups of keys
AKS operates over all ten keys
4
If AKS is disabled, all keys can operate simultaneously.
1.2.11 Outputs
The QT1103 has a serial output using one or two wires,
RS-232 data format, and automatic baud rate detection. A
simple protocol is employed.
The QT1103 operates in slave mode, i.e. it only sends data
to the host after receiving a request from the host.
An additional /CHANGE (state changed) signal allows the
use of the serial interface to be optimised, rather than being
polled continuously.
1.2.12 Simplified Mode
To reduce the need for option resistors, the simplified
operating mode places the part into fixed settings with only
the AKS feature being selectable. LP mode is also possible
in this configuration. Simplified mode is suitable for most
applications.
QT1103_3R0.03_0607