Capacitive Touch Sensor IC (Sale)

Product Description

Description: Capacitance is an amazingly accurate way to measure everything from physical contact to length or pressure. While capacitance sensors typically require a fair amount of circuitry, we now have one in a single IC with an I2C digital interface. Make tactile switches obsolete!



Features:

• 
  Accuracy: 4 fF (yes femto)


• 
  Linearity: 0.01%


• 
  Common-mode (not changing) capacitance up to 17 pF


• 
  Full-scale (changing) capacitance range: ±4 pF


• 
  Tolerant of parasitic capacitance to ground up to 60 pF


• 
  Update rate: 10 Hz to 90 Hz


• 
  Simultaneous 50 Hz and 60 Hz rejection at 16 Hz


• 
  Temperature sensor on-chip
  
  Resolution: 0.1°C, accuracy: ±2°C


• 
  Voltage input channel


• 
  Internal clock oscillator


• 
  2-wire serial interface (I2C®-compatible)


• 
  Power
  
  2.7 V to 5.25 V single-supply operation
  
  0.7 mA current consumption


• 
  Operating temperature: –40°C to +125°C


• 
  16-lead TSSOP package

Documents: AD7746 Datasheet