Most power efficient drivers for 12-, 14- and 16-bit A/D converters unveiled

USA: Analog Devices Inc. has introduced a family of low-power rail-to-rail amplifiers for high-speed data acquisition systems that require exceptional accuracy, precision and power efficiency.

For system designers who are looking to achieve full datasheet specifications from high resolution A/D converters, the ADA4805-1 (single) and ADA4805-2 (dual) amplifiers provide the only solution with quiescent current as low as 495µA.

The amplifiers’ Dynamic Power Scaling (DPS) feature allows users to dynamically manage the power consumption by shutting-down the amplifier between analog-to-digital converter samples. This further reduces by up to 90 percent the power consumption — with no performance degradation —when compared to similar solutions.

The 100-MHz ADA4805-1 and ADA4805-2 amplifiers achieve a high slew rate of 160 V/μs, low noise (5.9 nV/√Hz at 100 kHz) and low distortion (−102 dBc/−116 dBc HD2/HD3 at 100 kHz) while consuming only 1.5 mW of power.

The amplifiers are designed for power-sensitive portable and battery-powered data acquisition devices, such as handheld or portable test and measurement instruments, battery-powered industrial equipment and remote environmental monitoring devices. They can also be used to reduce power and thermal dissipation in high-density applications such as cellular base stations and medical imaging equipment.