Analog Devices Intros ADA4899-1 Operational Amplifier
Analog Devices Inc. (ADI, Wilmington, MA) expanded 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 ADA4899-1 unity gain stable operational amplifier (op amp) achieves 1 nV/rt-Hz voltage noise and spurious free dynamic range of 117 dBc at 1 MHz. By minimizing voltage noise and harmonic distortion, the ADA4899-1 is suitable for high-accuracy applications 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. This enables the ADA4899-1 to deliver both low voltage noise (1 nV/rt Hz) and low distortion (117 dB at 1 MHz) at unity gain. In addition to the ac performance, the ADA4899-1 has dc input specifications that are rarely found in high-speed op amps -- 0.23 mV maximum offset voltage and 1 µA maximum input bias current. The ADA4899-1 works well with ADI's 18-bit PulSAR analog-to-digital converters, including the AD7674.
The ADA4899-1 is in full production. The device is rated to work over an extended industrial temperature range of -40 °C to +125 °C. It is available in two packaging options: a 3 mm x 3 mm lead-frame chip-scale package, and the traditional eight-lead small-outline integrated circuit package. The ADA4899-1 is priced at $1.89 per unit in 1,000-piece quantities.
