TSC2004

具有 SPI 串行接口的毫微瓦功耗触摸屏控制器

The 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 to these standard features, the TSC2004 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 TSC2004 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 TSC2004 is available in a miniature, 18-lead, 5 x 5 array, 2.554 ±0.54mm x 2.554 ±0.54mm wafer chip-scale package WCSP, and a 20-pin, 4 x 4 QFN package. Both packages are characterized for the -40°C to +85°C industrial temperature range.

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4-Wire Touch Screen Interface

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Ratiometric Conversion

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Single 1.2V to 3.6V Supply

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Preprocessing to Reduce Bus Activity

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High-Speed I2C-Compatible Interface

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Internal Detection of Screen Touch

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Register-Based Programmable:

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10-Bit or 12-Bit Resolution

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Sampling Rates

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System Timing

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On-Chip Temperature Measurement

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Touch Pressure Measurement

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Auto Power-Down Control

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Low Power:

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760µW at 1.8V, 50SSPS

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580µW at 1.6V, 50SSPS

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285µW at 1.2V, 50SSPS

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74µW at 1.6V, 8.2kSPS Eq. Rate

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47µW at 1.2V, 8.2kSPS Eq. Rate

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Enhanced ESD Protection:

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±8kV HBM

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±1kV CDM

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±25kV Air Gap Discharge

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±12kV Contact Discharge

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2.5 x 2.5 WCSP-18 and 4 x 4 QFN-20 Package

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APPLICA ONS

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Cellular Phones

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Portable Instruments

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MP3 Players, Pagers

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Multiscreen Touch Control

U.S. Patent No. 6,246,394; other patents pending.

I2C is a trademark of NXP Semiconductors.

All other trademarks are the property of their respective owners