QT1080 8 KEY QTOUCH™ SENSOR IC is an IC chip for touch screen with 8 touch points
The QT1080 is an 8‑key charge‑transfer touch sensor IC designed for low‑power portable applications such as MP3 players, remote controls, and other human‑interface devices. It features self‑calibration, spread‑spectrum noise rejection, and optional Adjacent Key Suppression (AKS) to improve reliability.
The device supports both one‑per‑key and binary‑coded output modes, offers a Sync/LP pin for synchronization or low‑power operation, and includes configurable option resistors for AKS grouping, fast‑detect mode, and maximum on‑duration timing. Detailed wiring diagrams and pin‑lists are provided for the 32‑QFN and 48‑SSOP lead‑free packages.
| Number of touch keys | 8 |
|---|---|
| Supply voltage | 2.8 V ~ 5.0 V |
| Typical current (LP mode) | 45 µA @ 3 V |
| Package types | 32‑QFN, 48‑SSOP (lead‑free) |
| Operating temperature range | -40 °C to +85 °C |
| Startup time after power‑up | 350 ms |
| Self‑calibration time | 350 ms (typical) |
It requires about 350 ms to initialize, calibrate, and start operating normally.
The device supports one‑per‑key outputs (push‑pull or open‑drain) and binary‑coded outputs that encode the active key on three pins.