LTC2493 Datasheet | Linear Technology

Features 24-Bit 2-/4-Channel ∆∑ ADC with Easy Drive Input Current Cancellation and I2C Interface Description n Up to 2 Differential or 4 Single-Ended Inputs n Easy Drive™ Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current n Directly Digitizes High Impedance Sensors with Full Accuracy n 2-Wire I2C Interface with 9 Addresses Plus One Global Address for Synchronization n 600n V RMS Noise n Integrated High Accuracy Temperature Sensor n GND to VCC Input/Reference mon Mode Range n Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode n2ppm INL, No Missing Codes n1ppm Offset and 15ppm Full-Scale Error n2× Speed/Reduced Power Mode (15Hz Using Internal Oscillator and 80µA at 7.5Hz Output) n No Latency: Digital Filter Settles in a Single Cycle, Even After a New Channel Is Selected n Single Supply 2.7V to 5.5V Operation (0.8m W) n Internal Oscillator n Tiny 4mm × 3mm DFN Package Applications n Direct Sensor Digitizer n Direct Temperature Measurement n Instrumentation n Industrial Process Control The LTC®2493 is a 4-channel (2-channel differential), 24-bit, No Latency ∆∑™ ADC with Easy Drive technology and a 2-wire, I2C interface. The patented sampling scheme eliminates dynamic input current errors and the shortings of on-chip buffering through automatic cancellation of differential input current. This allows large external source impedances and rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy. The LTC2493 includes a high accuracy temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from binations of 4 analog input channels operating in singleended or differential modes) or its internal temperature sensor. The integrated temperature sensor offers 1/30th °C resolution and 2°C absolute accuracy. The LTC2493 allows a wide mon mode input range (0V to VCC), independent of the reference voltage. Any...