TSC2302 Datasheet, PDF (1/81 Pages) Burr-Brown (TI) – PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC

PROGRAMMABLE TOUCH SCREEN CONTROLLER
WITH STEREO AUDIO CODEC
TSC2302
SLAS394 – JULY 2003
FEATURES
• SPI™ Serial Interface
• Touch Screen Controller
– 4-Wire Touch Screen Interface
– Internal Detection of Screen Touch
– Touch Pressure Measurement
– Ratiometric Conversion
– Programmable 8-, 10- or 12-Bit Resolution
– Programmable Sampling Rates Up to
125 kHz
– Direct Battery Measurement (0 to 6 V)
– On-Chip Temperature Measurement
– Integrated Touch Screen Processor
Reduces Host CPU Interrupts and Overhead
– Internal Timing Control With Programmable
Delays and Averaging
• Stereo Audio Codec
– 20-Bit Delta-Sigma ADC/DAC
– Dynamic Range: 98 dB
– Sampling Rate Up to 48 kHz
– I²S Serial Interface
– Stereo 16-Ω Headphone Driver
• Full Power-Down Control
• 8-Bit Current Output DAC
• On-Chip Crystal Oscillator
• Programmable Bass/ Midrange/ Treble EQ
Effects Processing
• Single 2.7-V to 3.6-V Supply
• 48-pin QFN Package
APPLICATIONS
• Personal Digital Assistants
• Cellular Phones
• MP3 Players
• Internet Appliances
• Smartphones
DESCRIPTION
The TSC2302 is a highly integrated PDA analog
interface circuit. It contains a complete 12-bit A/D
resistive touch screen converter (ADC) including
drivers, touch pressure measurement capability, and
8-bit D/A converter (DAC) output for LCD contrast
control. The TSC2302 offers programmable resolution
of 8, 10, and 12 bits and sampling rates up to 125 kHz
to accommodate different screen sizes. The TSC2302
interfaces to the host controller through a standard SPI
serial interface.
The TSC2302 features a high-performance 20-bit,
48-ksps stereo audio codec with highly integrated
analog functionality. The audio portion of the TSC2302
contains microphone input with built-in pre-amp and
microphone bias circuit, an auxiliary stereo analog
input, a mono line-level output, and a stereo
headphone amplifier output. The digital audio data is
transferred through a standard I²S interface. A fully
programmable PLL for generating audio clocks from a
wide variety of system clocks is also included.
The TSC2302 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 TSC2302 is available in a
48-lead QFN.
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 conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily in-
clude testing of all parameters.
Copyright © 2003, Texas Instruments Incorporated