SX8638数据手册集成电路（IC）的传感器电容式触控规格书PDF

描述 Description

The SX8638 is an ultra low power, fully integrated 8-channel solution for capacitive touch-buttons and slider with proximity detection applications. Unlike many capacitive touch solutions, the SX8638 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO). Each GPIO is typically configured as LED driver with independent PWM source for enhanced lighting control such as intensity and fading.

特性 Features

• Complete Eight Sensors Capacitive Touch Controller for
• Buttons and Slider
• Pre-configured for 2 Buttons and a Slider
• 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
• 256 steps PWM Linear and Logarithmic control

• Proximity Sensing up to several centimeters
• High Resolution Capacitive Sensing
• Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
• Capable of Sensing through Overlay Materials up to 5mm thick

• Extremely Low Power Optimized for Portable Application
• 8uA (typ) in Sleep Mode
• 80uA (typ) in Doze Mode (Scanning Period 195ms)
• 175uA (typ) in Active Mode (Scanning Period 30ms)

• Programmable Scanning Period from 15ms to 1500ms
• Auto Offset Compensation
• Eliminates False Triggers due to Environmental Factors (Temperature, Humidity)
• Initiated on Power-up and Configurable Intervals

• Multi-Time In-Field Programmable Firmware Parameters for Ultimate Flexibility
• On-chip user programmable memory for fast, self contained start-up

• \"Smart\" Wake-up Sequence for Easy Activation from Doze
• No External Components per Sensor Input
• Internal Clock Requires No External Components
• Differential Sensor Sampling for Reduced EMI
• 400 KHz Fast-Mode I²C Interface with Interrupt
• -40°C to +85°C Operation

应用 Application

·Notebook/Netbook/Portable/Handheld computers

·Cell phones, PDAs

·Consumer Products, Instrumentation, Automotive

·Mechanical Button Replacement

简介

SX8638属于集成电路（IC）的传感器电容式触控。由制造生产的SX8638传感器，电容式触控该系列产品提供操作电容式触摸感应传感器所需的模拟激励和测量资源，并以一种便于微控制器或类似器件使用的格式（例如 I2C 或 SPI 串行接口、UART 或简单的逻辑信号）来传递由此产生的信息。这些器件常用于人机界面应用。