LTC2497

LTC2497 16-Bit 8-/16-Channel DS ADC with Easy Drive Cancellation and Input Current I2C Interface Features n Up to Eight Differential or 16 Single-Ended Inputs n Easy DriveTM 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 600nV RMS Noise (0.02LSB Transition Noise) n GND to VCC Input/Reference Common Mode Range n Simultaneous 50Hz/60Hz Rejection n 2ppm INL, No Missing Codes n 1ppm Offset and 15ppm Full-Scale Error 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 (0.8mW) n Internal Oscillator n Tiny 5mm × 7mm QFN Package Applications n Direct Sensor Digitizer n Direct Temperature Measurement n Instrumentation n Industrial Process Control Description The LTC®2497 is a 16-channel (eight differential), 16-bit, No Latency DSTM ADC with Easy Drive technology and a 2-wire, I2C interface. The patented sampling scheme eliminates dynamic input current errors and the shortcomings 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 LTC2497 includes an integrated oscillator. This device can be configured to measure an external signal f...