ADS7846E/2K5 features ● Same pin arrangement as ADS7843 ● 2.2V to 5.25V working voltage source ● Internal 2.5V reference voltage source ● Direct battery measurement (0V to 6V) ● On chip temperature measurement ● Touch pressure measurement ● QSPITM/SPITM 3-wire interface ● Automatic shutdown ● TSSOP-16, SSOP-16, QFN-16, and VFBGA-48 packaging
ADS7846E/2K5 is the next generation version of the industry standard ADS7843 4-wire touch screen controller. ADS7846E/2K5 is 100% compatible with existing ADS7843 pins and can be inserted into the same slot. This makes it easy to upgrade the current application to a new version. Additional features such as direct battery measurement, temperature measurement, and contact pressure measurement can be utilized by simply changing the software. The ADS7846E/2K5 also has an on chip 2.5V reference, which can be used for auxiliary input, battery monitoring, and temperature measurement modes. When not in use, the reference voltage source can also be powered off to save power consumption. The internal benchmark can operate at a power supply voltage as low as 2.7V, while monitoring the battery voltage from 0V to 6V< The low power consumption of 0.75mW (typical value of 2.7V with reference voltage source turned off), high speed (up to 125kHz clock rate), and on-chip driver make the ADS7846E/2K5 an ideal choice for battery powered systems, such as personal digital assistants (PDAs) with resistive touch screens, pagers, cellular phones, and other portable devices. The ADS7846 is packaged in small TSSOP-16, SSOP-16, QFN-16, and VFBGA-48 packages, with a rated temperature range of -40 ° C to+85 ° C.
ADS7846E/2K5 application ● Personal digital assistant ● Portable instrument ● Point of sale terminal ● Pager ● Touch screen display ● Mobile phone