ADS7846E Datasheet

Data Acquisition - Touch Screen Controllers


The ADS7846E is a next-generation version to the industrystandard ADS7846E 4-wire touch screen controller. TheADS7846 is 100% pin-compatible with the existing ADS7846E,and drops into the same socket. This allows for easy upgradeof current applications to the new version. Only softwarechanges are required to take advantage of the added featuresof direct battery measurement, temperature measurement,and touch-pressure measurement. The ADS7846E alsohas an on-chip 2.5V reference that can be used for theauxiliary input, battery monitor, and temperature measurementmodes. The reference can also be powered down whennot used to conserve power. The internal reference operatesdown to 2.7V supply voltage while monitoring the batteryvoltage from 0V to 6V.The low-power consumption of < 0.75mW (typ at 2.7V,reference off), high speed (up to 125kHz clock rate), and onchipdrivers make the ADS7846E an ideal choice for batteryoperatedsystems such as personal digital assistants (PDAs)with resistive touch screens, pagers, cellular phones, andother portable equipment. The ADS7846E is available in thesmall TSSOP-16, SSOP-16, QFN-16, and VFBGA-48 packagesand is specified over the &ndash;40&deg;C to +85&deg;C temperaturerange. ADS7846E Features &bull; SAME PINOUT AS ADS7843&bull; 2.2V TO 5.25V OPERATION&bull; INTERNAL 2.5V REFERENCE&bull; DIRECT BATTERY MEASUREMENT (0V to 6V)&bull; ON-CHIP TEMPERATURE MEASUREMENT&bull; TOUCH-PRESSURE MEASUREMENT&bull; QSPITM/SPITM 3-WIRE INTERFACE&bull; AUTO POWER-DOWN&bull; TSSOP-16, SSOP-16, QFN-16,AND VFBGA-48 PACKAGES ADS7846E Applications &bull; PERSONAL DIGITAL ASSISTANTS&bull; PORTABLE INSTRUMENTS&bull; POINT-OF-SALE TERMINALS&bull; PAGERS&bull; TOUCH SCREEN MONITORS&bull; CELLULAR PHONES


[{"Name":"Touch Panel Interface","Value":"4-Wire"},{"Name":"Resolution (Bits)","Value":"12 b"},{"Name":"Data Rate/Sampling Rate (SPS, BPS)","Value":"125k"},{"Name":"Voltage - Supply","Value":"2.2 V ~ 5.25 V"},{"Name":"Current - Supply","Value":"500μA"},{"Name":"Operating Temperature","Value":"-40°C ~ 85°C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

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