AP3891

Data Sheet Enhanced Multi-touch Capacitive Touch Screen Controller AP389X General Description Features (Continued) The AP389X is a low-cost high-resolution single chip solution for APA capacitive touch screen. It is an 8-bit single cycle 8051 microcontroller with I2C Interface. The chip includes 8-bit successive approximation analog-to-digital converters with an I2C interface and multiplexer-switcher circuits for flexible measurement of analog signal from APA panel. An accurate switched-capacitor integrator is built-in and it can auto calibrate the pixel parameters for a wide range of capacitance on the touch screen (0.1pF to 4pF). On-chip capacitor can replace external component. This touch screen controller (TSC) with CMOS integration circuit provides an ideal choice for APA touch panel. The AP389X is specified over the temperature range of -40°C to 95°C. The AP389X is available in QFN-7×7-56 (for AP3890) and QFN-8×8-68 (for AP3891 and AP3892) packages. Features Mutual Capacitive Touch Sensing Dual Power Supply: 2.8V to 3.6V Operation Voltage; 1.6V to 2.0V Operation Voltage Up to 30/38/36 Drive Lines and 17/22/23 Sense Lines Dedicated Internal Two-wire Serial Control Bus I2C and UART between AP389X and Host Single-end Integrator with Programmable Gain Control and Offset Control Multiplexed Analog Digitization with Two 8-bit Resolution Odd/Even Scan SAR ADCs and Its Dedicated 2X to 8X Accumulator XSRAM Buffers Single Cycle 8051 CPU Core, Maximum Operating ...