1 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 Discharge

– ±11kV Contact Discharge

• 1.5 x 2.0 WCSP-12 Package

2 Applications

• Cellular Phones

• Portable Instruments

• MP3 Players, Pagers

• Multiscreen Touch Control

3 Description

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

converter, including drivers and the control logic to

measure touch pressure.

In addition to these standard features, the TSC2014

offers preprocessing of the touch screen

measurements to reduce bus loading, thus reducing

the consumption of host processor resources that can

then be redirected to more critical functions.

The TSC2014 supports an I2C serial bus and data

transmission protocol in all three defined modes:

standard, fast, and high-speed. It offers

programmable resolution of 10 or 12 bits to

accommodate different screen sizes and performance

needs.

The TSC2014 is available in a miniature, 12-lead,

3 x 4 array, (1.555 ±0.055)mm x (2.055 ±0.055)mm

wafer chip-scale package (WCSP) package. The

device is characterized for the –40°C to +85°C

industrial temperature range.