New op amp eases design challenges of high-resolution data acquisition systems that require extremely low levels of noise and distortion.Analog Devices Inc. expands its portfolio with an amplifier that eases design challenges of high-resolution data acquisition systems by minimizing two fundamental error sources; voltage noise and harmonic distortion. The ADA4899-1is the industry’s first unity gain stable operational amplifier (op amp) to achieve 1-nV/rt-Hz voltage noise and spurious free dynamic range (SFDR) of 117 dBc at 1 MHz. By minimizing voltage noise and harmonic distortion, the ADA4899-1 is ideal for applications that require the highest degree of accuracy, such as radar-based collision avoidance systems, medical ultrasound and precision instrumentation.
The ADA4899-1 op amp features a patent-pending advanced circuit architecture that addresses the fundamental performance trade-offs between noise and distortion, which are inherent in traditional input stages. This enables the ADA4899-1 to deliver both extremely low voltage noise (1 nV/rt Hz) and very low distortion (117 dB at 1 MHz) at unity gain. In addition to the superior AC performance, the ADA4899-1 has DC input specifications that are rarely found in high-speed op amps, 0.23mV max offset voltage and 1uA max input bias current. The ADA4899-1 works well with ADI’s leading 18-bit PulSAR® ADCs, including the AD7674.
Pricing and Availability
The ADA4899-1 is in full production. The device is rated to work over an extended industrial temperature range of – 40 degrees C to + 125 degrees C. It is available in two packaging options: a tiny 3 mm x 3 mm LFCSP (lead frame chip-scale package), which reduces lead inductance, provides better thermal characteristics, and saves board space, and the traditional 8-lead SOIC (small outline integrated circuit) package. The ADA4899-1 is priced at $1.89 per unit in 1,000-piece quantities.