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AR7646 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – 12-bit Touch Panel Controller IC whit Temperature Sensor | |||
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The wireless communication solution provider
12-bit Touch Panel Controller IC
whit Temperature Sensor
AR7643
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
APPLICATIONS
ÆÃ Touch screen monitors
ÆÃ PDAs
ÆÃ Point-of-sales terminals
ÆÃ Pagers
ÆÃ High speed data acquisition
ÆÃ Portable instruments
ÆÃ 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 +85°C.
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