LTC2481 Datasheet

The LTC2481 combines a 16-bit plus sign No Latency ΔΣ^™ analog-to-digital converter with patented Easy Drive technology and I²C digital 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 input signals, with rail-torail input range to be directly digitized while maintaining exceptional DC accuracy.

The LTC2481 includes on-chip programmable gain and an oscillator. The LTC2481 can be configured through an I²C interface to provide a programmable gain from 1 to 256 in 8 steps, to digitize an external signal or internal temperature sensor, reject line frequencies (50Hz, 60Hz or simultaneous 50Hz/60Hz) as well as a 2x speed-up mode.

The LTC2481 allows a wide common mode input range (0V to V_CC) independent of the reference voltage. The reference can be as low as 100mV or can be tied directly to V_CC. The LTC2481 includes an on-chip trimmed oscillator eliminating the need for external crystals or oscillators. Absolute accuracy and low drift are automatically maintained through continuous, transparent, offset and full-scale calibration.