Linear Technology LTC2379-18 AD converter

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Linear Technology has introduced the LTC2379-18, a serial 18-bit, 1.6 Msps SAR analog to digital converter that achieves 101 dB SNR and -118 dB THD while supporting a fully differential ±5 V input range.

The device features a maximum INL of ±2 LSB with no missing codes and guaranteed specifications over the -40 to 125°C temperature range.

Operating from a 2.5 V supply, it consumes 18 mW and is available in small 3 x 4 mm DFN and MSOP-16 packages. The high SNR, fast throughput and low power dissipation make it suitable for high-performance medical, industrial and motor vehicle applications.

Complementing the LTC2379-18 is the pin- and software-compatible 16-bit, 2 Msps LTC2380-16 that achieves 96 dB SNR and ±0.5 LSB maximum INL. Both devices are the first in a family of 18-/16-bit high-performance SAR ADCs with speeds ranging from 250 ksps up to 2 Msps.

They offer a new 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.

Shutdown mode further reduces power dissipation to 1.25 µW when idle. The true no-latency operation enables accurate one-shot measurements even after lengthy idle periods with no minimum sample rate required.