16-Bit, 1Msps, Low Power SAR ADC with Serial Interface

Complementing the LTC2383-16 are the pin- and software-compatible LTC2382-16 (500ksps) and LTC2381-16 (250ksps). These devices feature a proprietary sampling architecture that allows the ADCs to begin acquiring the next sample during the current conversion. This greatly extends the acquisition time and allows the use of extremely low power ADC drivers, further reducing the overall power budget.

These user friendly ADCs feature a simple digital timing interface and require few external components. All feature a shutdown mode that reduces power dissipation to 1.25uW when not converting. True no latency operation enables accurate one-shot measurements even after lengthy idle periods with no minimum sample rate required. The flexible serial SPI interface supports I/O voltages from 1.8V to 5V. To support robust customer designs with long product lifetimes, all key AC and DC specs including THD and sleep current are guaranteed.

To achieve uncompromised AC performance, we recommend the fast settling LT6350 ADC driver for single-ended to differential conversion of input signals. We also recommend the LTC6652-2.5, a precision external reference with high accuracy, low power and small size.