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MK715 - Touch Screen Controller

Datasheet Summary

Description

The MK715 Touch Screen Controller IC provides all the screen drive, Analog to Digital converter (ADC) and control circuits to easily interface to 4-wire analog resistive touch screens.

It also includes a general purpose A to D converter and a clock synthesizer.

Features

  • • • • • • • • • • • • • • • • • • • Tiny 20 pin SSOP (150 mil body) 4 microamp standby current Less than 3mA active current at 3.3V, including screen drive Touch pressure can be measured One or two general purpose A to D inputs On-chip voltage reference 32.768kHz crystal/clock input MHz clock outputs available Operates with four wire touch screens Ratiometric conversion eliminates screen calibration Automatic wake up upon screen touch Programmable conversion rate to a maximum of 303 points per s.

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Datasheet preview – MK715

Datasheet Details

Part number MK715
Manufacturer Integrated Circuit Systems
File Size 376.88 KB
Description Touch Screen Controller
Datasheet download datasheet MK715 Datasheet
Additional preview pages of the MK715 datasheet.

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Full PDF Text Transcription

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MK715 Touch Screen Controller General Description The MK715 Touch Screen Controller IC provides all the screen drive, Analog to Digital converter (ADC) and control circuits to easily interface to 4-wire analog resistive touch screens. It also includes a general purpose A to D converter and a clock synthesizer. The IC continually monitors the screen waiting for a touch. In this mode, the supply current is typically 4µA. When the screen is touched, the IC performs analog to digital conversions to determine the location of the touch, stores the X and Y locations in the registers, and issues an interrupt. This process is repeated up to 303 times per second until no further screen touches are detected, at which time the low current mode is resumed.
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