QT320-D

Overview

The QT320-D is a two-channel programmable advanced capacitive sensor IC designed for touch controls. It operates on a 1.8V to 5V supply with a typical current drain of 60µA. The device features an 8-pin DIPSOICTA package and supports operating temperatures from 0°C to +70°C. Key specifications include independent channel sensitivity adjustments via sampling capacitor (Cs) and threshold settings, selectable output polarities, and toggle or normal mode outputs. It utilizes a charge-transfer method for signal acquisition and includes a HeartBeat health indicator.

Feature Summary

• Two-channel digital burst mode charge-transfer sensing capable of projecting fields through various dielectrics
• User-defined cloning process allows independent configuration of sensitivity, drift compensation, and thresholds per channel
• Continuous autocalibration eliminates the need for manual adjustments during operation
• Integrated HeartBeat health indicator provides continuous monitoring of device status

Applications

• Computer peripherals
• Entertainment devices
• Access systems
• Pointing devices
• Appliance control

Procurement Notes

Verify the specific suffix 'D' confirms the commercial temperature range of 0°C to +70°C against the industrial variant. Confirm the 8-pin DIPSOICTA package availability matches the target assembly requirements. Ensure the cloned configuration data aligns with the intended application parameters before finalizing procurement.

Selection Notes

Select the QT320-D when a commercial temperature range is sufficient for the environment. Consider the 60µA power consumption for battery-operated designs. Evaluate the need for two independent channels versus single-channel alternatives. Verify that the required electrode geometry and dielectric materials are compatible with the charge-transfer sensing principle.

Part Context

The QT320 series belongs to Quantum's QPROX family of capacitive sensor ICs. The 'D' suffix denotes the commercial temperature grade, distinguishing it from the industrial '-IS' variant which supports -40°C to +85°C. This component serves as a core sensing element for human-machine interfaces requiring robust touch detection without mechanical switches.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.