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SAR ADC supports a wide ±4.096V input

Posted: 19 Jan 2010     Print Version  Bookmark and Share

Keywords:ADC  automotive  I/O  cycle latency 

Linear Technology Corp. debuts the LTC2393-16, a 16bit SAR ADC that offers a temperature compensated internal reference with a production-tested 0.1 per cent initial accuracy and 20ppm/°C. It also achieves 94dB SNR at sample rates up to 1MSps with no cycle latency

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

The AC performance of the device is pretty good at 94dB SNR and 105dB THD. DC performance offered is <±>2LSB INL (max) and 16bits no missing codes resolution. The LTC2393-16 also features a temperature-compensated internal reference with a production-tested 0.1 per cent initial accuracy and 20ppm/°C (max) temperature coefficient over the automotive and industrial temperature ranges. The device dissipates 140mW at 1MSps and features a shutdown mode that reduces power dissipation to 175µW 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 1MSps sample rates through both serial and parallel interfaces at I/O voltages from 1.8V to 5V.

Offered with the LTC2393-16 are the LTC2392-16 (500KSps) and LTC2391-16 (250KSps) pin- and software-compatible ADCs in 48-pin 7mm x 7mm LQFP and QFN packages, with guaranteed specifications tested over the commercial, industrial and automotive temperature ranges. An integrated demo board featuring the LT6350 ADC driver—with rail-to-rail input and differential outputs—driving the LTC2393 ADC is available. All devices are available now in production quantities, priced starting at Rs.966.88 ($20.65) each for the LTC2393-16 and Rs.368.02 ($7.86) each for the LTC2391-16 in 1,000-piece quantities.

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