AD7843ARUZ

The AD7843 is a 12-bit successive approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. The part operates from a single 2.2V to 5.25V power supply and features throughput rates greater than 125 kSPS. The external reference can vary from 1V to +VCC, and the analog input range is from 0V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1 µA. The AD7843 features on-board switches, coupled with low power and high speed, making it ideal for battery-powered systems such as personal digital assistants with resistive touch screens, and other portable equipment. The part is available in a 16-lead TSSOP package (16-TSSOP, 0.173", 4.40mm Width) and supports surface mount mounting. The device operates over a temperature range of -40°C to 85°C. It has a specified throughput rate of 125 kSPS and a maximum power dissipation of 1.37 mW at 125 kSPS and VCC = 3.6V. The interface is serial, and it supports 4-wire resistive touch screens. The resolution is 12 bits, programmable to 8-bit or 12-bit. It also includes 2 auxiliary analog inputs.