AXP152 Resistive Touch Screen Controller

GENERAL

The mTouch AXP152 Series Resistive Touch Screen Controller is a complete, easy to integrate, cost effective, and universal touch screen controller chip solution. The AR1000 Series is designed for high volume, small form factor touch solutions with quick time to market requirements. Developed by touch experts with over 15 years experience, the AR1000 Series has sophisticated proprietary touch screen decoding algorithms allowing it to send your application fully processed and reliable touch coordinates.

FEATURES

Special Features:

• RoHS Compliant

• Power-Saving Sleep mode

• Industrial Temperature Range

• Built in drift compensation algorithm

• 128 Bytes of user EEPROM

• 4 x 4 mm QFN package Power Requirements:

• Operating Voltage: 3.3 to 5.0 volts ±5%

• Standby Sleep Current: <1uA

• Operating “No touch” Current: 3.0mA typ.

• Operating “Touch” Current: 17mA typ with a touch sensor having 200Ω layers. - Actual current is dependent on the touch sensor used. Touch Modes:

• Off, Stream, Down, Up, and more. Touch Sensor Support:

• 4 wire, 5 wire, and 8 wire analog resistive

• Lead to Lead Resistance: 50Ω to 2,000Ω

• Layer to Layer Capacitance: 0 to 0.5uF

• Touch Sensor Time Constant: 500us maximum Touch Resolution:

• 10-bit resolution maximum Touch Coordinate Report Rate:

• 140 reports per second typ. with a touch sensor of 0.02uF with 200Ω layers. - Actual report rate is dependent on the touch sensor used. Communications:

• SPI, slave mode, p/n AR1020

• I2 C™, slave mode, p/n AR1020

• UART, 9600 bps, p/n AR1010

Sensor Support All 4, 5, and 8-wire sensors are supported, regardless of manufacturer or construction. See BASICS OF RESISTIVE SENSORS section. Low-Power Wake-Up Wake-up from power saving sleep mode, via a touch or communication input. Configuration Registers Configuration registers provide user configuration of controller features. See Configuration Registers section. Touch Algorithms Algorithms provide for good calibration-corrected coordinates, with no additional development or code.  Touch decoding  Coordinate data filtering  Calibration corrected coordinate option  Built-in touch modes Communication Control AR1010 supports UART communication. AR1020 supports I2C and SPI communication. See Communication Interface section.