AD7877 is a touch screen controller, providing 4-wire touch screen interface, LCD noise reduction function, automatic conversion sequencer and timer, user-programmable conversion parameters, on-chip temperature sensor, on-chip 2.5V reference, on-chip 8-bit DAC, 3 auxiliary analog inputs, 1 dedicated and 3 optional GPIOs, 2 direct battery measurement channels (0.5V to 5V), 3 interrupt outputs, touch pressure measurement, wake up on touch function, specified throughput rate of 125 kSPS, single supply, VCC of 2.7 V to 5.25 V, separate VDRIVE level for serial interface, shutdown mode: 1 μA maximum 32-lead, LFCSP, 5 mm×5 mm package 25-ball, WLCSP, 2.5 mm×2.8 mm package