TSC2301

Features:

` SPI™ Serial Interface
` Touch Screen Controller
4-Wire Touch Screen Interface
Internal Detection of Screen Touch and Keypad Press
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
4-by-4 Keypad Interface With Programmable De-Bounce and Key Masking
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
I<sup>2</sup>S Serial Interface
Stereo 16-W Headphone Driver
` Full Power-Down Control
` 8-Bit Current Output DAC
` On-Chip Crystal Oscillator
` Programmable Bass/ Midrange/ Treble EQ Effects Processing
` 6 GPIO Pins
` Single 2.7-V to 3.6-V Supply
` 64-Pin TQFP Package
` 120-Ball MicroStar Junior™ BGA Package

Application

· Personal Digital Assistants
· Cellular Phones
· MP3 Players
· Internet Appliances
· Smartphones


Pinout




Specifications

Supply voltage AVDD, HPVDD, DVDD	4 V
Ground voltage differences AGND, DGND	±0.1 V
Digital input voltage	-0.3 V to (DVDD + 0.3 V)
Analog input voltage	-0.3 V to (DVDD + 0.3 V)
Ambient temperature under bias, TA	-40°C to 125°C
Storage temperature, Tstg	-55°C to 150°C
Junction temperature, TJ	150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds	260°C

Description

The TSC2301 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, keypad controller, and 8-bit D/A converter (DAC) output for LCD contrast control.

The TSC2301 offers programmable resolution of 8, 10, and 12 bits and sampling rates up to 125 kHz to accommodate different screen sizes. The TSC2301 interfaces to the host controller through a standard SPI serial interface.

The TSC2301 features a high-performance 20-bit, 48-ksps stereo audio codec with highly integrated analog functionality. The audio portion of the TSC2301 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. A fully programmable PLL for generating audio clocks from a wide variety of system clocks is also included.

The TSC2301 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 TSC2301 is available in 64-lead TQFP, and 120-ball VFBGA packages.