14-Bit, 4.5Msps SAR ADC with precision reference in TSOT-23

Linear Technology Corporation introduced the LTC2314-14, a 14-bit 4.5Msps successive approximation register (SAR) ADC in a tiny 8-lead TSOT-23 package. This small SAR ADC integrates a precision 2.048V/4.096V reference with 7ppm/°C typical and guaranteed 20ppm/°C maximum temperature coefficient into an 8mm² footprint.

The ADC operates from a 3V or 5V supply and features the lowest power dissipation (18mW at 3V or 31mW at 5V) compared to other competitive parts on the market. With its serial SPI interface, tiny footprint and very low power dissipation, the ADC  is ideal for a wide range of portable and space-constrained applications, including medical devices, communications systems and battery-operated systems.

Also available is the LTC2315-12, a 12-bit pin- and software-compatible version of the LTC2314-14, featuring a fast 5Msps sample rate. These two ADCs lead a family of 14- and 12-bit SAR ADCs featuring sample rates from 500ksps to 5Msps with 77.5dB SNR at 14 bits and 73dB SNR at 12 bits resolution. Accurate DC specifications include a maximum INL and DNL of ±3.75LSB and ±0.99LSB at 14-bits, and ±1.25LSB and ±0.99LSB at 12-bits, respectively.

The complete LTC2314 SAR ADC family offers single-ended unipolar inputs, small 8-lead TSOT-23 packages, precision integrated reference and low power dissipation with flexible 3V or 5V supply operation, along with nap and sleep modes for optimizing the power within a system.

The ADCs are available in commercial, industrial and automotive (-40°C to 125°C) temperature grades. Pricing begins at $9.52 each for the LTC2314-14 and $5.17 each for the LTC2315-12 in 1,000-piece quantities. The DC1563A evaluation board for the LTC2314 SAR ADC family is available at www.linear.com/demo