TSC2046

TSC2046 SBAS265G − OCTOBER 2002 − REVISED JANUARY 2008 Low-Voltage I/O TOUCH SCREEN CONTROLLER FEATURES D SAME PINOUT AS ADS7846 D 2.2V TO 5.25V OPERATION D 1.5V TO 5.25V DIGITAL I/O D INTERNAL 2.5V REFERENCE D DIRECT BATTERY MEASUREMENT (0V TO 6V) D ON-CHIP TEMPERATURE MEASUREMENT D TOUCH-PRESSURE MEASUREMENT D QSPI AND SPI 3-WIRE INTERFACE D AUTO POWER-DOWN D AVAILABLE IN TSSOP-16, QFN-16, AND VFBGA-48 PACKAGES APPLICATIONS D PERSONAL DIGITAL ASSISTANTS D PORTABLE INSTRUMENTS D POINT-OF-SALE TERMINALS D PAGERS D TOUCH SCREEN MONITORS D CELLULAR PHONES US Patent No. 6246394 QSPI and SPI are registered trademarks of Motorola. Pen Detect +VCC PENIRQ DESCRIPTION The TSC2046 is a next-generation version to the ADS7846 4-wire touch screen controller which supports a low-voltage I/O interface from 1.5V to 5.25V. The TSC2046 is 100% pin-compatible with the existing ADS7846, and will drop into the same socket. This allows for easy upgrade of current applications to the new version. The TSC2046 also has an on-chip 2.5V reference that can be used for the auxiliary input, battery monitor, and temperature measurement modes. The reference can also be powered down when not used to conserve power. The internal reference operates down to 2.7V supply voltage, while monitoring the battery voltage from 0V to 6V. The low power consumption of < 0.75mW typ at 2.7V (reference off), high-speed (up to 125kHz sample rate), and on-chip drivers make the TSC2046 an ideal choice for battery-operat...