LTC2494 Datasheet | Linear Technology

Features n Up to 8 Differential or 16 Single-Ended Inputs n Easy Drive TM Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current n Directly Digitizes High Impedance Sensors with Full Accuracy n 600n V RMS Noise n Programmable Gain from 1 to 256 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 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 n Internal Oscillator n Tiny 5mm × 7mm QFN Package Applications n Direct Sensor Digitizer n Direct Temperature Measurement n Instrumentation n Industrial Process Control LTC2494 16-Bit 8-/16-Channel DS ADC with PGA and Easy Drive Input Current Cancellation Description The LTC®2494 is a 16-channel (8-differential), 16-bit, No Latency DS™ 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-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy. The LTC2494 includes programmable gain, 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 single-ended or differential modes) or its internal temperature sensor. The integrated temperature sensor offers 1/2°C resolution and 2°C absolute accuracy. The LTC2494 can be configured to provide a programmable gain from 1 to 256 in 8 steps. The LTC2494 allows a wide mon mode input range (0V to VCC), independent of the reference voltage....