DESCRIPTION

· The QT300 is a Capacitance-to-Digital Converter (CDC) IC designed for detecting femtofarad level changes in capacitance.
· It outputs raw binary data to a host device via SPI or UART interfaces, making it suitable for applications with unique signal processing needs.
· The device requires only one external sampling capacitor to control gain, eliminating the need for additional components.
· It can operate in Master or Slave mode and supports multiple QT300s on a single SPI bus.
· The QT300 is ideal for instrumentation and touch control applications, offering direct-to-digital conversion with a 16-bit resolution and log response for wide dynamic range.

FEATURES

· 16-bit direct-to-digital conversion with log response for wide dynamic range.
· Single wire UART interface and Master/Slave mode SPI interface.
· Programmable clock speed for flexible operation.
· Converts objects into intrinsic touch sensors.
· Requires only one external sample capacitor to control gain, adjustable from 1nF to 500nF.
· Operates on demand and supports synchronization for multiple QT300s without cross-interference.

APPLICATIONS

· Fluid level sensors.
· Proximity sensors.
· Moisture detection.
· Position sensing.
· Transducer drivers for pressure and humidity sensing.
· Material sensors.