CAP1106-1-AIA-TR Datasheet, PDF (1/4 Pages) Microchip Technology – 5 and 6 Channel Capacitive Touch Sensor

CAP1105 / CAP1106
5 and 6 Channel Capacitive Touch
Sensor
PRODUCT FEATURES
General Description
The CAP1106 and CAP1105, which incorporate SMSC’s
RightTouch^{® 1} technology, are multiple channel Capacitive
Touch sensors. The CAP1106 contains six (6) individual
capacitive touch sensor inputs while the CAP1105 contains
five (5) sensor inputs. Both devices offer programmable
sensitivity for use in touch sensor applications. Each sensor
input automatically recalibrates to compensate for gradual
environmental changes.
The CAP1105 / CAP1106 includes Multiple Pattern Touch
recognition that allows the user to select a specific set of
buttons to be touched simultaneously. If this pattern is
detected, then a status bit is set and an interrupt generated.
Additionally, the CAP1105 / CAP1106 includes circuitry and
support for enhanced sensor proximity detection.
The CAP1105 / CAP1106 offers multiple power states
operating at low quiescent currents. In the Standby state of
operation, one or more capacitive touch sensor inputs are
active.
Deep Sleep is the lowest power state available, drawing
5uA (typical) of current. In this state, no sensor inputs are
active. Communications will wake the device.
Data Brief
Applications
„ Desktop and Notebook PCs
„ LCD Monitors
„ Consumer Electronics
„ Appliances
Features
„ Six (6) Capacitive Touch Sensor Inputs - CAP1106
„ Five (5) Capacitive Touch Sensor Inputs - CAP1105
— Programmable sensitivity
— Automatic recalibration
— Individual thresholds for each button
„ Proximity Detection
„ Multiple Button Pattern Detection
„ Calibrates for Parasitic Capacitance
„ Analog Filtering for System Noise Sources
„ Press and Hold feature for Volume-like Applications
„ Multiple Communication Interfaces
— SMBus / I²C compliant interface (CAP1106-1 only)
— SMSC BC-Link interface (CAP1106-2 only)
— SPI communications (CAP1105 only)
„ Low Power Operation
— 5uA quiescent current in Deep Sleep
— 50uA quiescent current in Standby (1 sensor input
monitored)
— Samples one or more channels in Standby
„ Available in 10-pin 3mm x 3mm RoHS compliant DFN
package
1. SMSC, the SMSC logo and RightTouch are registered trademarks
and the RightTouch logo is a trademark of Standard Microsystems
Corporation ("SMSC").
CAP1106 BLOCK DIAGRAM
VDD GND
Capacitive Touch Sensing Algorithm
SMBus /
BC-Link
Protocol
CS1 CS2 CS3 CS4 CS5 CS6
SMCLK¹ / BC_CLK²
SMDATA¹ / BC_DATA²
ALERT#¹ / BC_IRQ#²
1 _{= CAP1106-1}
2 _{= CAP1106-2}
CAP1105 BLOCK DIAGRAM
VDD GND
Capacitive Touch Sensing
Algorithm
SPI Protocol
CS1 CS2 CS3 CS4 CS5
SPI_CS#
SPI_CLK
SPI_MOSI
SPI_MISO
SMSC CAP1105 / CAP1106
PRODUCT PREVIEW
Revision 1.32 (01-05-12)