Features

• Easy Drive™ Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
• Directly Digitizes High Impedance Sensors with Full Accuracy
• 600nV_RMS Noise, Independent of V_REF
• GND to V_CC Input/Reference Common Mode Range
• 2-Wire I²C Interface
• Simultaneous 50Hz/60Hz Rejection
• 2ppm (0.25 LSB) INL, No Missing Codes
• 1ppm Offset and 15ppm Full-Scale Error
• No Latency: Digital Filter Settles in a Single Cycle
• Single Supply 2.7V to 5.5V Operation
• Internal Oscillator
• Six Addresses Available
• Available in a Tiny (3mm × 3mm) 10-Lead DFN Package

Typical Application

Description

The LTC® 2483 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 LTC2483 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 noise level is 600nV_RMS independent of V_REF. This allows direct digitization of low level signals with 16‑bit accuracy. The LTC2483 includes an on-chip trimmed oscillator, eliminating the need for external crystals or oscillators and provides 87dB rejection of 50Hz and 60Hz line frequency noise. Absolute accuracy and low drift are automatically maintained through continuous, transparent, offset and full-scale calibration.