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PDF AS1080 Data sheet ( Hoja de datos )
| Número de pieza | AS1080 | |
| Descripción | 8 Channels Capacitive Touch Sensor IC | |
| Fabricantes | ASI | |
| Logotipo |  |
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AS1080
8 Channels Capacitive Touch Sensor IC
From Santa Clara, United States of America
Leading Performance: ESD HBM >8k Volts (Directly Applied to All IC Pins)
Operating Temperature up to >+950C
Features
Overview
• Analog and Digital – Mixed Mode IC
AS1080 is a 8 channels touch sensor IC capable of
• Support Capacitive Touch Screen Applications
detecting near-proximity or touch on 8 electrodes. It
Low Cost Single Layer ITO Touch Screen
allows electrodes to project independent sense field
• Support Capacitive Touch Key Applications
through any dielectric like glass, plastic, ceramic and
• Support Capacitive Proximity Sensing Applications
wood. It can accommodate a wide range of
• 8 and 12 independent electrode inputs
implementations due to its rich feature set.
• 8 and 12 individual outputs (with QFN package)
• Simultaneous multi-electrode sensing
• I2C compatible interface with interrupt IRQ_L
• Selectable I2C address
• Multiple devices in a system allow for up to 24 keys
• Build-in algorithm for ease of use
Sensitivity control per key
Auto calibration
Auto drift compensation
Noise filtering and rejection
Reduce BOM Cost
Internal oscillator – no external crystal or
oscillators
Internal LDO – no external LDO or regulator
No external tuning components
Direct drive LED (2mA to 5mA)
Environment Specification
Operation Temperature: -400C to +950C
Leading Performance in Capacitive Touch
Sensor IC
Implementations
• Touch Screen
• Touch Keys
• Touch Pads
• Switch Replacements
• Slider Replacements
Typical Applications
• Audio/Video
• PC peripherals
• Home appliance
• Gaming machine/console
• Security systems
• Instruments panels
• Access system
• Remote controls
• Lighting controls
• Single Layer ITO Glass
• MP3 and MP4
ESD HBM Comparision
(Directly Applied to All IC Pins)
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
ESD: HBM 8k volts (Directly applied to all IC pins)
Leading Performance in Capacitive Touch
Sensor IC
Electrical Specification
Operating voltage:
2.0V to 5.5V
Low-power operating mode:
7uA to 15uA
Package Types (Lead Free and Green Packages)
Package
Part No. Channel (Size mm)
Types
QFN28
AS1080
8 5 x 5 x 0.8
TSSOP20
AS1080
8 6.5 x 4.4 x 0.9
Standby mode:
5uA
Standby: wakes up to normal mode in less than 32ms
Advanced Sensor Integrations
Rev 1.4 - May 2010
3945 Freedom Cir, Suite 710
Santa Clara, CA 95054
1
1 page  
AS1080
8 Channels Capacitive Touch Sensor IC
From Santa Clara, United States of America
Technology Overview
Introduction
The ASI Touch sensor devices are charging a sense electrode of unknown capacitance to a known current. The
electrode is typically a metal area on a printed circuit board. The resulting potential is transferred into a
measurement circuit. By measuring the potential after one or more charge-and-discharge cycles, the
capacitance of the sense plate can be determined.
By controlling the charging and discharging current, together with a proprietary sensing method, the result is a
very low power consumption operation.
Placing a finger on the touch surface introduces external capacitance. This represents as a finger touch or as
proximity detection. Signal processing in the decision logic makes ASI Touch sensor robust and reliable. False
triggering due to AC power noise, electrostatic spikes or sudden unintentional touch or proximity is eliminated.
ASI Touch sensors provide truly independent single or multiple keys sensing. Where multiple keys are used,
each key is individually sensed and measured. Each key can be set for an individual sensitivity level. Keys of
different sizes and shapes can be used to meet different requirements.
ASI Touch sensors can be deployed in many ways, normal or 'touch' mode and high-sensitivity or 'proximity'
mode. The highly sensitive proximity sensing is used to detect an end-user's approaching finger, and have the
user interface interrupt the electronic equipment or electrical appliance to initiate a system function. The sensors
can also be programmed into a 'toggle' mode, which is very useful for implementing a press-ON/press-OFF
ON/OFF switch function.
Thanks to the proprietary low power sensing method, the charging pulses are kept at a very low energy level. The
benefits of this approach include lower cross-sensor interference, reduced RF emissions and susceptibility.
ASI Touch sensors feature automatic drift compensation to account for slow changes due to ageing or changing
environmental conditions. They have a dynamic range of several decades and do not require coils, oscillators,
RF components, special cable, RC networks, or a lot of discrete parts. The ASI Touch sensor solution is simple,
robust, elegant, and affordable.
Advanced Sensor Integrations
Rev 1.4 - May 2010
3945 Freedom Cir, Suite 710
Santa Clara, CA 95054
5
5 Page 
AS1080
8 Channels Capacitive Touch Sensor IC
From Santa Clara, United States of America
Advanced Sensor Integrations
Rev 1.4 - May 2010
3945 Freedom Cir, Suite 710
Santa Clara, CA 95054
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AS1080.PDF ] | |
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