TSC2300
SLAS372 — NOVEMBER 2002
www.ti.com
PROGRAMMABLE TOUCH SCREEN CONTROLLER
WITH AUDIO CODEC
FEATURES
APPLICATIONS
SPI™ Serial Interface
Personal Digital Assistants
Cellular Phones
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Touch screen Controller
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4-Wire Touch Screen Interface
Internal Detection of Screen Touch and
Keypad Press
MP3 Players
Internet Appliances
Smartphones
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Touch Pressure Measurement
Ratiometric Conversion
Programmable 8, 10 or 12 Bit Resolution
Programmable Sampling Rates Up to 125
kHz
DESCRIPTION
The TSC2300 is a highly integrated PDA analog
interface circuit. It contains a complete 12-bit A/D
resistive touch screen converter including drivers, touch
pressure measurement capability, keypad controller and
8-bit D/A converter output for LCD contrast control. The
TSC2300 offers programmable resolution of 8, 10, and
12 bits and sampling rates up to 125 kHz to
accommodate different screen sizes. The TSC2300
interfaces to the host controller through a standard SPI
serial interface.
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Direct Battery Measurement (0 to 6 V)
On-Chip Temperature Measurement
4-by-4 Keypad Interface With
Programmable De-bounce
Integrated Touch Screen Processor
Reduces Host CPU Interrupts and
Overhead
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Internal Timing Control With Programmable
Delays
The TSC2300 features a high-performance 20-bit,
48-ksps audio codec with highly integrated analog
functionality. The audio portion of the TSC2300 contains
microphone input with built-in pre-amp and microphone
bias circuit, an auxiliary stereo analog input, a stereo
line-level output, a differential mono line-level output,
and a stereo headphone amplifier output. The digital
audio data is transferred through a standard I2S
interface.
Audio Codec
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20-Bit Delta-Sigma ADC/DAC
Dynamic Range: 98 dB
Sampling Rate Up To 48 kHz
I2S Serial Interface
Full Power Down Control
On-Chip Crystal Oscillator
6 GPIO Pins
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The TSC2300 also offers two battery measurement
inputs capable of battery voltages up to 6 V, while
operating at a supply voltage of only 2.7 V. It also has an
on-chip temperature sensor capable of reading 0.3°C
resolution. The TSC2300 is available in a 64-lead TQFP.
Single 2.7-V to 3.6-V Supply
64-pin TQFP Package
US Patent No. 6246394
SPI is a trademark of Motorola.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.
Productionprocessingdoesnotnecessarilyincludetestingofallparameters.
Copyright © 2002, Texas Instruments Incorporated