– ADI Launches ADA4805 Amplifier Family Featuring Dynamic Power Scaling (DPS), Providing Best-in-Class Offset Drift, Slew Rate, Noise, and Distortion Performance for Portable, Battery-Powered, High-Density Data Acquisition Devices

September 25, 2014 – Analog Devices (www.analog.com, NASDAQ: ADI), a global leader in high-performance semiconductors for signal processing applications, has launched a family of low-power rail-to-rail amplifiers for high-speed data acquisition systems requiring exceptional accuracy, precision, and power efficiency.

For system designers seeking to implement the full specifications found in the datasheet of a high-resolution A/D converter, the ADA4805-1 (single) and ADA4805-2 (dual) amplifiers offer a unique solution using a low quiescent current of 495μA. Through the amplifier's dynamic power scaling (DPS) function, users can dynamically manage power consumption by stopping the amplifier between A/D converter samples.

This allows for an additional reduction of up to 90 percent in power consumption without performance degradation compared to similar solutions. Further details regarding the industry's most power-efficient A/D converter driver can be found in the following video (http://www.analog.com/ada4805video).

The 100 MHz ADA4805-1 and ADA4805-2 amplifiers achieve a high slew rate of 160 V/μs, low noise of 5.9 nV/√Hz at 100 kHz, and low distortion of −102 dBc/−116 dBc HD2/HD3 at 100 kHz while consuming only 1.5 mW of power. The amplifiers are designed for power-sensitive battery-powered portable data acquisition devices, such as small, portable test and measurement instruments, battery-powered industrial equipment, and remote environmental monitoring devices. They can also be used to reduce power and heat losses in high-density applications, such as cellular base stations and medical imaging equipment.

Featuring a very low offset voltage drift of up to 1.5 μV/°C (0.2 μV/°C typ), the ADA4805 family provides eight times lower drift performance compared to other high-speed (100 MHz) amplifiers. Through the combination of excellent AC/DC performance, designers can improve system sensitivity, dynamic range, and overall system accuracy.

The ADA4805-1/-2 amplifier has a wide voltage range, making it applicable at 3V, and for applications requiring a wider dynamic range, it can also operate with a +/-5V power supply.