16-bit 5Msps with Wide Input Common Mode Range

Linear Technology Korea (CEO Hong Sa-gwak) announced the launch of a 16-bit 5Msps SAR (successive approximation register) ADC (analog-to-digital converter) (product name: LTC2311-16) that provides a wide rail-to-rail input common mode range.

The LTC2311-16 features flexible differential inputs that accommodate analog signals up to the maximum Nyquist frequency. The product directly converts various signal types while providing excellent SNR (signal-to-noise ratio) of 81.6dB under 2.2MHz input signal conditions and achieving a high CMRR (common mode rejection ratio) of 85dB under the same high-speed input signal conditions.


Instrumentation and medical applications that require channel-to-channel isolation often use single-channel ADCs to isolate the front-end circuit individually. This circuit is replicated across all channels, and circuit simplification has a significant impact on system complexity. The LTC2311-16's flexible differential inputs and wide input common mode range simplify input signal conditioning design, significantly reduce the number of required components, and decrease system cost, power consumption, and circuit board area.

The LTC2311-16 is offered as a pin-compatible family of 16-, 14-, and 12-bit SAR ADCs with sample rates of 5Msps and 2Msps. The family incorporates a precise internal reference with low drift and a maximum temperature coefficient of 20ppm/°C, simplifying system design. The product family can be powered by 3.3V or 5V supplies, consuming 30mW at 3.3V and 50mW at 5V. The high-speed SPI-compatible CMOS or LVDS serial interface is ideal for high-integration, high-speed systems.

The LTC2311-16 is available in commercial, industrial, and automotive (–40°C ~ 125°C) temperature grades. Other devices in the product family are scheduled to be released throughout the year. The product is priced at $9.95 per unit based on a quantity of 1,000. Samples and demo boards can be requested at www.linear.com/product/LTC2311-16 or by contacting Linear Technology's local office.