The AD7879 is a 12-bit successive approximation analog-todigital converter (ADC) with a synchronous serial interface and low on-resistance switches for driving 4-wire resistive touch screens. The AD7879 works with a very low power supply (a single 1.6 V to 3.6 V) and features throughput rates of 105 kSPS. The device includes a shutdown mode that reduces its current consumption to less than 6 A.