LTC2499 Datasheet | Linear Technology

Features 24-Bit 8-/16-Channel ADC with Easy Drive Cancellation and Input Current I2C Interface Description n Up to Eight Differential or 16 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 27 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 n 2ppm INL, No Missing Codes n 1ppm Offset and 15ppm Full-Scale Error n 2x 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 5mm × 7mm QFN Package Applications n Direct Sensor Digitizer n Direct Temperature Measurement n Instrumentation n Industrial Process Control The LTC®2499 is a 16-channel (eight differential), 24-bit, No Latency ∆S™ 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 LTC2499 includes a high accuracy, temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from binations of 16 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 LTC2499 allows a wide mon mode input range (0V to VCC), independent of the reference voltage....