TSC2005

BurrĆBrown Products from Texas Instruments TSC2005 SBAS379C – DECEMBER 2006 – REVISED MARCH 2008 1.6V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with SPI™ Interface FEATURES 1 23 4-Wire Touch Screen Interface Ratiometric Conversion Single 1.6V to 3.6V Supply Preprocessing to Reduce Bus Activity High-Speed SPI-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: – 800µW at 1.8V, 50SSPS – 600µW at 1.6V, 50SSPS – 75µW at 1.6V, 8.2kSPS Eq. Rate Enhanced ESD Protection: – ±6kV HBM – ±1kV CDM – ±25kV Air Gap Discharge – ±12kV Contact Discharge 2.5 x 3 WCSP-18 Package U.S. Patent NO. 6246394; other patents pending. APPLICATIONS Personal Digital Assistants Cellular Phones Portable Instruments Point-of-Sale Terminals MP3 Players, Pagers Multiscreen Touch Control DESCRIPTION The TSC2005 is a very low-power touch screen controller designed to work with power-sensitive, handheld applications that are based on an advanced low-voltage processor. It works with a supply voltage as low as 1.6V, 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 to these standard features, ...