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Linear Technology introduces the LTC2447, a variable speed/resolution 24-bit Delta Sigma ADC that features a multiplexing architecture to directly digitize multiple ratiometric sensors. Four differential inputs, coupled with four differential reference inputs, allow ratiometric measurements of multiple RTDs, bridges, and pressure sensors. A fifth differential reference can be shared by any or all inputs. This multiplexing architecture, combined with high accuracy and low drift, improves the performance while simplifying the analog front end of applications measuring temperature, pressure, flow, chromatography, weight, and general purpose data acquisition. The device's flexible input multiplexer allows any combination of 8 single-ended or 4 differential inputs to be digitized with either a dedicated reference input or a global reference input. The converter's multiplexer outputs and ADC inputs are pinned out separately. This allows external signal chain components to be included within the calibration loop of the ADC, automatically removing offset and drift errors.

Linear Technology Corporation

Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA, 95035