Electronicdesign 5810 0312lineartech

SAR ADC Integrates Precision Reference Into Tiny TSOT-23

March 14, 2013
14-bit 4.5 Msps SAR ADC integrates a precision 2.048 V / 4.096 V reference with 7 ppm/°C typical and guaranteed 20 ppm/°C maximum temperature coefficient into an 8 mm² footprint.

Linear’s LTC2314-14 is a 14-bit 4.5 Msps SAR ADC integrating a precision 2.048 V / 4.096 V reference with 7 ppm/°C typical and guaranteed 20 ppm/°C maximum temperature coefficient into an 8 mm² footprint. The device operates from a 3 V or 5 V supply and features 18 mW at 3 V or 31 mW at 5 V power dissipation. With its serial SPI interface, the device is suitable for a range of portable and space-constrained applications, including medical devices, communications systems and battery-operated systems. Also available is a 12-bit compatible version, the LTC2315-12, featuring a 5 Msps sample rate. The devices exhibit 77.5 dB SNR at 14 bits and 73 dB SNR at 12 bits resolution. Accurate dc specifications include a maximum INL and DNL of ±3.75 LSB and ±0.99 LSB at 14-bits, and ±1.25 LSB and ±0.99 LSB at 12-bits. Available today in an 8-lead TSOT-23 package, prices begin at $9.52 each/1,000 for the LTC2314-14 and $5.17 each/1,000 for the LTC2315-12.

LINEAR TECHNOLOGY CORPORATION

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