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| The wireless communication solution provider 12-bit Touch Panel Controller IC whit Temperature Sensor FEATURES Pin compatible to AR7643 Serial interface 4-wire touch screen interface Embedded touch panel drivers Internal 2.5 V reference Direct battery measurement ( 0 V to 6 V) Touch-pressure measurement One auxiliary analog input On-chip temperature sensor 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 Full power down control SSOP-16 package AR7643 APPLICATIONS U U U U U U U Touch screen monitors PDAs Point-of-sales terminals Pagers High speed data acquisition Portable instruments Low power instruments DESCRIPTION The AR7646 Touch Screen Controller IC is an advanced version of the AR7643. The AR7646 is a 12-bit SAR analog-to-digital converter (ADC) with SPI serial interface and low on-resistance drivers for 4-wire resistive touch panels. The AR7646 is a highly integrated controller for portable applications which use 4-wire resistive touch panels such as PDAs, portable instruments, cellular phones, etc. The AR7646 contains all the analog and digital circuitry necessary to complete a pen request. The AR7646 features temperature, battery monitor and touch-pressure measurements and also provides an internal 2.5 V reference that may be turned ON or OFF independently of the ADC. The AR7646 consumes only 405 mW (internal reference OFF) at a 125 KHz sample rate and a 2.7 V supply and consumes power less than 2.7 mW in shutdown mode. The AR7646 is guaranteed down to 2.2 V supply. The AR7646 is provided in a very small 16-lead SSOP package and is guaranteed over the temperature range from 40 to +85C. The wireless communication solution provider The wireless communication solution provider |
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