QT1081-ISG

Product Summary

The QT1081-ISG is an improved, lower cost, simplified circuit version of the popular QT1080 sensor IC. The QT1081-ISG is designed for low cost appliance, mobile, and consumer electronics applications. QTouch technology is a type of patented charge-transfer sensing method well known for its robust, stable, EMC-resistant characteristics. The QT1081-ISG is the only all-digital capacitive sensing technology in the market today. This technology has over a decade of applications experience spanning thousands of designs. The QT1081-ISG is renowned for simplicity, reliability, ease of design, and cost effectiveness.

Parametrics

QT1081-ISG absolute maximum ratings: (1)Operating temperature, Ta: -40 to +85℃; (2)Storage temp, Ts: -50 to +125℃; (3)Vdd: -0.3 to +6.0V; (4)Max continuous pin current, any control or drive pin: ±20mA; (5)Short circuit duration to ground or Vdd, any pin: infinite; (6)Voltage forced onto any pin: -0.3V (Vdd + 0.3) Volts.

Features

QT1081-ISG features: (1)Number of keys: 1 to 8; (2)Technology: Patented spread-spectrum charge-transfer (one-per-key mode); (3)Key outline sizes: 5mm x 5mm or larger (panel thickness dependent); widely different sizes and shapes possible; (4)Key spacings: 6mm or wider, center to center (panel thickness, human factors dependent); (5)Electrode design: Single solid or ring shaped electrodes; wide variety of possible layouts; (6)Layers required: One layer substrate; electrodes and components can be on same side; (7)Substrates: FR-4, low cost CEM-1 or FR-2 PCB materials; polyamide FPCB; PET films, glass; (8)Electrode materials: Copper, silver, carbon, ITO, Orgacon ink (virtually anything electrically conductive); (9)Panel materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible); (10)Adjacent Metal: Compatible with grounded metal immediately next to keys; (11)Panel thickness: Up to 50mm glass, 20mm plastic (key size dependent); (12)Key sensitivity: Settable via change in reference capacitor (Cs) value; (13)Outputs: Parallel discrete output, one-per-key, active-high Moisture tolerance: Good; (14)Power: 2.8V ~ 5.0V, <15μA (8 keys at 2.8V, 340ms Low Power mode); (15)Package: 32-pin 5 x 5mm QFN RoHS compliant; (16)Signal processing: Self-calibration, auto drift compensation, noise filtering, patented Adjacent Key SuppressionTM; (17)Applications: Portable devices, domestic appliances and A/V gear, PC peripherals, office equipment; (18)Patents: AKS (patented Adjacent Key Suppression), QTouch (patented Charge-transfer method).

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