STMPE16M31QTR

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Capacitive touch sensing is a popular way of detecting and measuring electrical charge present on and around the surface of electrical components and conductive materials. The STMPE16M31QTR is a capacitive touch-sensor IC that provides an interface between a capacitive sensor and a host controller. It enables the development of robust, low-power and cost-effective touch-sensing products and applications. The STMPE16M31QTR is ideal for applications such as touchscreens, buttons, gloves, touchpads and mobile phones.

The STMPE16M31QTR capacitive touch-sensor IC is based on the mutual capacitance technique, which offers superior performance for stable and reliable sensing with minimal power consumption. The device is capable of detecting up to 16 capacitive touches simultaneously, using an array of electrodes connected to the IC. Each touch is digitized by the device and is reported back to the host controller.

The STMPE16M31QTR also has an integrated hardware keypad scanning engine, which is designed to scan and detect interrupt keys, keypads and other capacitive touchscreens. The device can be configured to detect rising edges, falling edges, or dual edges of the interrupt key signals. The host system can use the keypad reading data directly or process the data using the internal RAM buffer. The device also provides an internal timer for host system synchronization.

Working Principle

The STMPE16M31QTR capacitive touch-sensor IC is based on the principle of mutual capacitance sensing. As the surface of an object approaches the surface of an electrode, it creates a change in the capacitance of the electrode. This change is detected by the IC, which then computes the position of the touch. This process is repeated for each electrode, and the positions are reported back to the host controller.

The STMPE16M31QTR capacitive touch-sensor IC features an advanced signal chain that includes dedicated processing blocks for each electrode. The signal chain optimizes signal-to-noise ratios, ensuring reliable and accurate touch detection in less time than traditional signal chains. Additionally, the device is equipped with an advanced low-power architecture, which enables it to operate in low-power modes that reduce power consumption.

Features and Benefits

The STMPE16M31QTR features an advanced sensing algorithm and architecture for touch detection, as well as an integrated hardware keypad scanner for robust and reliable keypad operation. It also features low-power operation modes that reduce power consumption. The device is designed to support up to 16 capacitive touches simultaneously and is capable of detecting edges and dual edges of the interrupt key signals.

The STMPE16M31QTR also provides an internal timer for host system synchronization. It is also equipped with advanced noise reduction filter algorithms, as well as a temperature-compensation feature to ensure accurate touch detection in high-temperature environments. The device is available in a 5mm x 7mm, 0.4mm pitch QFN package, making it ideal for applications that require a small form factor.

Conclusion

The STMPE16M31QTR capacitive touch-sensor IC is a robust, low-power and cost-effective solution for applications such as touchscreens, buttons, gloves, touchpads, and mobile phones. The device features an integrated hardware keypad scanner, low-power operation modes, advanced noise reduction filter algorithms and temperature-compensation feature.

The STMPE16M31QTR capacitive touch-sensor IC is ideal for those looking to develop cost-effective and reliable touch-sensing applications. It is available in a small 5mm x 7mm, 0.4mm pitch QFN package, making it suitable for a wide range of applications.

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