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AR764312-bit Touch Panel Controller IC
FEATURES
Ć Serial interface
Ć 4-wire touch panel interface
Ć Embedded touch panel drivers
Ć 2.2 V to 5.5 V supply voltage
Ć 12-bit analog to digital converter
Ć Programmable 8 or 12 bit resolution
Ć Up to 125 KHZ conversion rate
Ć 2 auxiliary analog inputs
Ć Full power down control
Ć SSOP-16 package
DESCRIPTION
APPLICATIONS
Personal digital assistants (PDAs)
Point of sales terminals
Pagers
High speed data acquisition
Portable instruments
Low power instruments
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.