18-Bit, 1.6Msps, Serial SAR ADC

Linear Technology Corp.'s LTC2379-18 is a serial 18-bit, 1.6Msps SAR analog to digital converter (ADC) that achieves a 101dB SNR and -118dB THD while supporting a fully differential plus or minus 5V input range. The LTC2379-18 features a maximum INL of plus or minus 2LSB with no missing codes and specifications over the -40 to 125C temperature range. Operating from a 2.5V supply, the LTC2379-18 consumes 18 MW and is available in 3 x 4 mm DFN and MSOP-16 packages. The LTC2379-18's high SNR, fast throughput and low power dissipation make it ideal for high performance medical, industrial and automotive applications.

Complementing the LTC2379-18 is the pin- and software-compatible 16-bit, 2Msps LTC2380-16. The LTC2380-16 achieves a 96dB SNR and plus or minus 0.5LSB maximum INL. The LTC2379-18 and LTC2380-16 are the first in a family of 18-/16-bit high performance SAR ADCs with speeds ranging from 250ksps up to 2Msps. These devices offer a digital gain compression feature that eliminates the need for a negative supply on the ADC driver, lowering the total power consumption of the signal chain. The devices' shutdown mode further reduces power dissipation to 1.25mu when idle. The true no-latency operation enables accurate one-shot measurements even after lengthy idle periods with no minimum sample rate required.