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Converter driver guarantees operation down to 2.375 V

Milpitas, Calif. — With guaranteed operation down to 2.375 V and rail-to-rail outputs, Linear Technology Corp. claims this is the only differential amplifier that can directly drive 2.5-V and 3-V SAR A/D converters without a negative supply.

The LT1994 is Linear Tech's latest fully differential amplifier for driving high-resolution analog-to-digital converters (A/D converters). Achieving -94 dBc harmonic distortion at 1 MHz and low voltage noise of 3 nV/√ Hz, the LT1994 provides the widest dynamic range on the lowest supply voltages, said Erik Soule, general manager of Linear Technology's signal conditioning product line.

Especially suited for driving 14-bit to 16-bit A/D converters, the LT1994 can be used for general-purpose differential signal amplification, level shifting, single-ended to differential conversion and differential line driver/receiver applications in industrial, instrumentation and medical applications.

In addition to low noise and low distortion characteristics, the LT1994 is capable of sourcing and sinking up to 85 mA. It draws approximately 14 mA supply current and features a shutdown pin that reduces consumption to 300 μA. The LT1994 is specified for operation from 2.375 V to 12.6 V.

Available in commercial and industrial temperature grades, it is offered in the MSOP-8 and DFN-8 packages. Pricing starts at $1.65 each in 1,000-piece quantities. Click here for the LT1994 data sheet.

Linear Technology , 1-800-454-6327, www.Linear.com.

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