16-bit, 1-Msps SAR ADC achieves 94-dB SNR

Linear Technology Corporation has introduced a 16-bit SAR ADC that achieves a 94 dB SNR at sample rates up to 1 Msps with no cycle latency.

Operating from a single 5 V supply and supporting a wide ±4.096 V input range, the LTC2393-16 is well suited for many general purpose designs that require maximum signal swings to overcome background noise levels in demanding industrial environments.

The LTC2393-16 claims to provide excellent AC performance, achieving 94 dB SNR and 105dB THD. DC performance features ±2LSB INL (max) and 16 bits no missing codes resolution. The LTC2393-16 also features a temperature-compensated internal reference with a production-tested 0.1 percent initial accuracy and 20 ppm/ degrees C (max) temperature coefficient over the automotive and industrial temperature ranges. The LTC2393-16 dissipates 140 mW at 1 Msps and features a shutdown mode that reduces power dissipation to 175 μW when not converting. True no latency operation enables accurate one shot measurements even after lengthy idle periods with no minimum sample rate required. The LTC2393-16 supports 1 Msps sample rates through both serial and parallel interfaces at I/O voltages from 1.8 V to 5 V.

Summary of Features: LTC2393-16

  • 1 Msps Throughput Rate
  • ±2 LSB INL (max)
  • Guaranteed 16-Bit No Missing Codes
  • 94 dB SNR (fIN = 20 kHz)
  • Single 5 V Supply
  • Differential Input Range: ±4.096 V
  • Internal Reference (10ppm/ degrees C)
  • No Data Latency, One Shot Operation
  • Parallel and Serial Interface
  • Internal Conversion Clock

  • 48-pin 7 mm x 7 mm LQFP & QFN Packages

The LTC2393-16 is now available, along with the LTC2392-16 (500 ksps) and LTC2391-16 (250 ksps) pin- and software-compatible ADCs in 48-pin 7 mm x 7 mm LQFP and QFN packages, with guaranteed specifications tested over the commercial, industrial and automotive temperature ranges. To achieve uncompromised AC performance, we recommend the fast settling, LT6350 ADC driver with rail-to-rail input and differential outputs.

All devices are available now in production quantities, priced starting at $20.65 each for the LTC2393-16 and $7.86 each for the LTC2391-16 in 1,000-piece quantities.



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