The QT310 is a single-channel digital advanced capacitance sensor IC that uses spread-spectrum burst modulation to dramatically reduce interference problems. It has full autocal capability, user programmable via cloning process, internal eeprom storage of user setups, cal data, variable drift compensation & recalibration times, BG and OBJ cal modes for learn-by-example, sync pins for daisy-chaining or noise suppression, variable gain via Cs capacitor change, selectable output polarity, high or low, toggle mode (optional via setups), push-pull output, completely programmable output behavior via cloning process from a PC and HeartBeat™ health indicator (can be disabled). It is widely used in material detection, toys and games, access controls, micro-switch replacement, appliance controls, security systems, fluid level sensors and industrial panels.
The QT310 is a single‑channel digital capacitance sensor IC that uses spread‑spectrum burst modulation to achieve high EMI rejection and low power consumption. It features a programmable RISC core, internal EEPROM for user‑defined setups, and a HeartBeat health indicator that can be disabled.
The device supports daisy‑chaining of multiple sensors, selectable output polarity, push‑pull output, and extensive sensitivity tuning via the sampling capacitor (Cs), external capacitance (Cx), threshold settings, and sleep‑cycle configuration. Calibration can be performed on‑demand through the /CAL_CLR pin or via the cloning process from a PC.
| Package Options | SOIC 8‑PIN, DIP |
|---|---|
| Operating Temperature | -40 °C to +85 °C |
| Sleep Cycle (SC) Range | 0 – 255 (default 1) |
| Threshold Setting Range | 1 – 255 counts |
| Sampling Capacitor (Cs) Typical Values | 10 nF – 200 nF |
| Positive Drift Compensation (PDC) Range | 0 – 255 (default 100) |
| Negative Drift Compensation (NDC) Range | 0 – 255 (default 2) |