AD7873ARUZ-REEL7

AD7873ARUZ-REEL7 is a 12bit successive approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. It operates from a single 2.2V to 5.25V supply, with a throughput rate of 125kSPS. It features direct battery measurement, temperature measurement, and touch pressure measurement. It also has an on-board reference of 2.5V that can be used for the auxiliary input, battery monitor, and temperature measurement modes. When not in use, the internal reference can be shut down to conserve power. An external reference can also be applied and varied from 1V to VCC with an analog input range from 0V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1µA. It features on-board switches. It is used in applications such as personal digital assistants, smart hand-held devices, touch screen monitors, point-of-sale terminals, pagers.

• 4-wire touch screen interface, on-chip 2.5V reference
• Direct battery measurement (0V to 6V), touch pressure measurement
• Single supply, VCC of 2.2V to 5.25V, ratiometric conversion
• High speed serial interface, one auxiliary analog input
• Resolution is 12bits, integral nonlinearity is ±2LSB maximum at (VCC = 2.7V to 3.6V)
• Gain error is ±4LSB maximum at (VCC = 2.7V to 3.6V)
• Noise is 70µV rms typical at (VCC = 2.7V to 3.6V, VREF = 2.5V)
• Power supply rejection ratio is 70dB typical at (VCC = 2.7V to 3.6V, VREF = 2.5V)
• Input capacitance is 37pF typical at (VCC = 2.7V to 3.6V, VREF = 2.5V)
• Operating temperature range from -40°C to +85°C, 16-lead TSSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party