Microchip | AR1021-I/SS

The AR1021-I/SS is a complete, easy to integrate, cost-effective and universal touch screen controller chip. Available in a SSOP-20 package.

The AR1000 Series has sophisticated proprietary touch screen decoding algorithms to process all touch data, saving the host from the processing overhead. Providing filtering capabilities beyond that of other low-cost devices, the AR1000 delivers reliable, validated and calibrated touch coordinates.

Features:

• RoHS Compliant
• Power-Saving Sleep mode
• Industrial Temperature Range
• Built-in Drift Compensation Algorithm
• 128 Bytes of User EEPROM
• Operating Voltage: 2.5-5.0 V ±5%
• Standby Current:
• 5V: 85 uA, typical; 125 uA (maximum)
• 2.5V: 40 uA, typical; 60 uA (maximum)
• Operating “No touch” Current:
• 3.0 mA (typical)
• Operating “Touch” Current:
• 17 mA, typical, with a touch sensor having 200 Ω layers
• Actual current is dependent on the touch sensor used
• AR1011/AR1021 Brown-Out Detection (BOR) set to 2.2V
• 4-Wire, 5-Wire and 8-Wire Analog Resistive
• Lead-to-Lead Resistance: 50-2,000???typical)
• Layer-to-Layer Capacitance: 0-0.5 uF
• Touch Sensor Time Constant: 500 us (maximum)
• 10-bit Resolution (maximum)

Applications:

• Mobile communication devices
• Personal Digital Assistants (PDA)
• Global Positioning Systems (GPS)
• Touch Screen Monitors
• KIOSK
• Media Players
• Portable Instruments
• Point of Sale Terminals