(China (Mainland))
Product Summary
The QT240-ISSG device is a burst mode digital charge-transfer (QT) sensor IC designed specifically for touch controls; QT240-ISSG includes all hardware and signal processing functions necessary to provide stable sensing under a wide variety of conditions. Only a single low cost capacitor per channel is required for operation. The QT240-ISSG employs bursts of charge-transfer cycles to acquire signals. Burst mode permits low power operation, dramatically reduces RF emissions, lowers susceptibility to RF fields, and yet permits excellent speed. Internally, signals are digitally processed to reject impulse noise using a consensus filter that requires six consecutive confirmations of detection.
Parametrics
QT240-ISSG absolute maximum ratings: (1)VDD: -0.3 to +5.5V; (2)Max continuous pin current, any control or drive pin: ±20mA; (3)Short circuit duration to ground, any pin: infinite; (4)Short circuit duration to VDD, any pin: infinite; (5)Voltage forced onto any pin: -0.3V to (Vdd + 0.3) Volts.
Features
QT240-ISSG features: (1)Four independent charge-transfer touch keys; (2)Individual outputs per channel - active high; (3)Projects prox fields through any dielectric; (4)Sensitivity easily adjusted on a per-channel basis; (5)100% autocal for life - no adjustments required; (6)3.9V ~ 5.5V single supply operation; (7)10s, 60s, infinite autorecal timeout (strap options); (8)Sync pin for line sync to suppress noise; (9)Spread spectrum operation; (10)Pin options for auto recalibration timings; (11)Extremely low cost per key; (12)20-SSOP RoHS compliant package.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||
|---|---|---|---|---|---|---|---|---|---|---|
 |
 QT240-ISSG |
Atmel |
Interface - Specialized 3.9 - 5.5V 4 Chan Touch Sensor |
Data Sheet |
Negotiable |
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| Image | Part No | Mfg | Description | |
Pricing (USD) |
Quantity | ||||
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QT240-ISS |
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IC SENSOR 4CHAN QTOUCH 20SSOP |
Data Sheet |
Negotiable |
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QT240-ISSG |
Atmel |
Interface - Specialized 3.9 - 5.5V 4 Chan Touch Sensor |
Data Sheet |
Negotiable |
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