The wireless communication solution provider 12-bit Touch Panel Controller IC AR7643 FEATURES ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ ƒÜ Serial interface 4-wire touch panel interface Embedded touch panel drivers 2.2 V to 5.5 V supply voltage 12-bit analog to digital converter Programmable 8 or 12 bit resolution Up to 125 KHZ conversion rate 2 auxiliary analog inputs Full power down control SSOP-16 package APPLICATIONS Personal digital assistants (PDAs) Point of sales terminals Pagers High speed data acquisition Portable instruments Low power instruments DESCRIPTION The AR7643 Touch Panel Controller IC is a 12-bit SAR analog-to-digital (ADC) converter with SPI serial interface and low on-resistance drivers for 4-wire resistive touch panels. The AR7643 is a highly integrated controller suitable for portable applications which use 4-wire resistive touch panels such as, PDA, portable instruments, cellular phone, etc. The AR7643 contains all the analog and digital circuitry necessary to complete a pen request. The AR7643 consumes only 648 mW at a 125 KHz sample rate and a 2.7 V supply and consumes only 2.7 mW in shutdown mode. The AR7643 is guaranteed to operate down to 2.2 V supply. The AR7643 is provided in a very small 16-lead SSOP package and is guaranteed over the temperature range from 40 to +85°C. The wireless communication solution provider The wireless communication solution provider