TSC2014 - Texas Instruments

TSC2014 4-Wire Touch Screen Controller

The TSC2014 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 singlecell battery. It contains a complete, ultralow-power, 12-bit, analog-to-digital (A/D) resistive touch screen con.

Features

•1 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:
  – 430μW at 1.8V, 50SSPS
  – 320μW at 1.6V, 50SSPS
  – 190μW at 1.2V, 50SSPS
  – 58μW at 1.6V, 8.2kSPS Eq. Rate
  – 37μW at 1.2V, 8.2kSPS Eq. Rate
• Enhanced ESD Protection:
  – ±8kV HBM
  – ±1kV CDM
  – ±25kV Air Gap .