The LTC2446/LTC2447 are 24-bit high-speed 8-channel ∆Σ ADCs with selectable multiple reference inputs. They are suitable for applications such as flow, weight scales, pressure, direct temperature measurement, gas chromatography, etc.
The LTC2446 and LTC2447 are 24-bit delta-sigma analog-to-digital converters (ADCs) featuring four sets of selectable differential inputs coupled with four sets of differential reference inputs. This architecture enables multiplexed ratiometric measurements for multiple RTDs, bridges, and other sensors using a single converter. A fifth differential reference input is available for channels not requiring ratiometric measurements, such as thermocouples or voltage sensing.
These devices offer high performance with up to 8kHz output rates and selectable speed/resolution modes providing noise levels as low as 200nVrms at 13.8Hz. The converters include a proprietary delta-sigma architecture ensuring absolute accuracy of 15ppm, guaranteed modulator stability, and immunity from lock-up under any input or reference conditions.
The devices support up to an 8kHz output rate.
There are five selectable differential reference inputs available.