TSC2302IRGZG4

TSC2302 SLAS394 – JULY 2003 PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH STEREO AUDIO CODEC FEATURES APPLICATIONS • • • • • • • • • • • • • • 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 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 include testing of all parameters. Copyright © 2003, Texas Instruments Incorporated TSC2302 www.ti.com SLAS394 – JULY 2003 MICBIAS AFILTR AFILTL I2SDIN AVDD−1V AVDD 30 kΩ I2 S Interface VCM I2SDOUT LRCLK 20 kΩ BCLK AGND Mute, 0db, 6dB, 12dB +20 to −40dB, 0.5dB Steps MICIN 317 Ω Σ−∆ ADC RLINEIN +12dB to − 35dB 0.5dB steps Digital Σ Audio +20 to −40dB, 0.5dB Steps 317 Ω Σ−∆ ADC LLINEIN MCLK Processing and PLL DVDD MONO+ DGND VREF+ VREF− RESET Headphone Driver Σ−∆ DAC Σ HPR Digital Gain 0 to −63.5dB 0.5dB Steps POL SPICLK HPVDD Σ SPISEL HPGND HPL Headphone Driver Σ−∆ DAC Σ Digital Gain 0 to −63.5dB 0.5dB Steps Control Control Logic and Interface SPI Interface SPIDIN SPIDO DAV DACSET DAC DACOUT PENIRQ VREFIN X+ X− Y+ Touch Panel Drivers Internal 2.5V/ 1.25V Reference Y− Temp Sensor VBAT1 Battery Monitor VBAT2 Battery Monitor SAR ADC GPIO_5/CLKO AUX1 AUX2 OSC COI COO 2 TSC2302 www.ti.com SLAS394 – JULY 2003 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE PACKAGE DESIGNATOR OPERATING TEMPERATURE RANGE TSC2302I QFN-48 RGZ -40°C to +85°C ORDERING NUMBER TRANSPORT MEDIA QUANTITY TSC2302IRGZ Trays, 308 TSC2302IRGZR Tape and reel, 2000 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted (1) TSC2302 Supply voltage: AVDD, HPVDD, DVDD Ground voltage differences: AGND, DGND 4V ±0.1 V Digital input voltage -0.3 V to (DVDD + 0.3 V) Analog input voltage -0.3 V to (AVDD + 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 (1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 3 www.ti.com TSC2302 www.ti.com SLAS394 – JULY 2003 ELECTRICAL CHARACTERISTICS At 25°C, HPVDD = AVDD = DVDD = +3.3 V, VREF = External 2.5 V, unless otherwise noted. PARAMETER CONDITIONS TSC2302 MIN TYP UNITS MAX AUXILARY ANALOG INPUTS Input voltage range 0 Input capacitance Input leakage current +VREFIN V 25 ρF 1 µA BATTERY MONITOR INPUT Input voltage range 0 6.0 V Input capacitance 25 ρF Input leakage current ±1 µA TEMPERATURE MEASUREMENT Temperature range -40 +85 °C Temperature resolution 0.3 °C Accuracy ±2 °C TOUCH SCREEN A/D CONVERTER Resolution Programmable: 8-, 10-,12-Bits No missing codes 12-bit resolution 12 10 Bits Bits Integral linearity ±6 LSB Offset error ±6 LSB Gain error ±6 LSB Noise µV RMS