This document describes the features and characteristics of the lQ QT1103 QTOUCH™ 10-KEY SENSOR IC chip, including the number of keys, technology, key outline sizes and spacings, electrode design, layer requirements, substrate materials, electrode materials, panel materials, adjacent metal compatibility, panel thickness, key sensitivity, outputs, moisture tolerance, power, package, signal processing, applications, and patents.
The QT1103 is a 10‑key touch‑sensor IC designed for low‑cost appliances, mobile devices and consumer electronics. It uses Quantum's patented spread‑spectrum charge‑transfer method and offers robust, EMC‑resistant operation.
The device supports 1‑10 keys, operates from 2.8 V to 5.0 V, and provides a serial RS‑232 output that can run on a single wire. Features include self‑calibration, auto‑drift compensation, adjacent‑key suppression (AKS), low‑power mode, and sync mode for external timing.
| Number of keys | 1 to 10 |
|---|---|
| Key outline size | 5 mm × 5 mm or larger |
| Key spacing | 6 mm or wider (center‑to‑center) |
| Operating voltage | 2.8 V ~ 5.0 V |
| Package | 32‑pin 5 × 5 mm QFN |
| Output interface | RS‑232 serial (single‑wire possible) |
| Reset and startup time | ≈260 ms |
| Self‑calibration time | ≈300 ms (typical) |
The QT1103 can support from one up to ten keys.
It operates from 2.8 V to 5.0 V.
Self‑calibration completes in about 300 ms typical.
The IC provides an RS‑232 serial output, which can operate on a single wire.