TSC2004

BurrĆBrown Products from Texas Instruments TSC2004 ® TSC2004 SBAS408E – JUNE 2007 – REVISED MARCH 2008 1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with I2C™ Interface FEATURES 1 23 4-Wire Touch Screen Interface Ratiometric Conversion Single 1.2V to 3.6V Supply Preprocessing to Reduce Bus Activity High-Speed I2C-Compatible Interface Internal Detection of Screen Touch Register-Based Programmable: – 10-Bit or 12-Bit Resolution – Sampling Rates – System Timing On-Chip Temperature Measurement Touch Pressure Measurement Auto Power-Down Control Low Power: – 760µW at 1.8V, 50SSPS – 580µW at 1.6V, 50SSPS – 285µW at 1.2V, 50SSPS – 74µW at 1.6V, 8.2kSPS Eq. Rate – 47µW at 1.2V, 8.2kSPS Eq. Rate Enhanced ESD Protection: – ±8kV HBM – ±1kV CDM – ±25kV Air Gap Discharge – ±12kV Contact Discharge 2.5 x 2.5 WCSP-18 and 4 x 4 QFN-20 Packages U.S. Patent No. 6,246,394; other patents pending. APPLICATIONS Cellular Phones Portable Instruments MP3 Players, Pagers Multiscreen Touch Control DESCRIPTION The TSC2004 is a very low-power touch screen controller designed to work with power-sensitive, handheld applications that are based on advanced low-voltage processors. It works with a supply voltage as low as 1.2V, which can be supplied by a single-cell battery. It contains a complete, ultralow-power, 12-bit, analog-to-digital (A/D) resistive touch screen converter, including drivers and the control logic to measure touch pressure. In addition ...