LTC2492 Datasheet | Linear Technology

Features 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 600n VRMS 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 n2x Speed Mode/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 DFN 4mm × 3mm Package Applications n Direct Sensor Digitizer n Direct Temperature Measurement n Instrumentation n Industrial Process Control LTC2492 24-Bit 2-/4-Channel ΔS ADC with Easy Drive Input Current Cancellation Description The LTC®2492 is a 4-channel (2-channel differential), 24‑bit, No Latency ∆∑™ ADC with Easy Drive technology. 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-torail input signals to be directly digitized while maintaining exceptional DC accuracy. The LTC2492 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 single-ended or differential modes) or its internal temperature sensor. It can be programmed to reject line frequencies of 50Hz, 60Hz, or simultaneous 50Hz/60Hz and configured to double its output rate. The integrated temperature sensor offers 1/30th°C resolution and 2°C absolute accuracy. The LTC2492 allows a wide mon mode input range (0V to VCC), independent of the reference voltage. Any...