Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage Noise, High Speed Op Amp

The ADA4899-1 is an ultralow noise (1 nV/√Hz) and distortion (<−117 dBc @1 MHz) unity-gain stable voltage feedback op amp, the combination of which makes it ideal for 16-bit and 18-bit systems. The ADA4899-1 features a linear, low noise input stage and internal compensation that achieves high slew rates and low noise even at unity gain. The Analog Devices, Inc. proprietary next-generation XFCB process and innovative circuit design enable such high performance amplifiers.

The ADA4899-1 drives 100 Ω loads at breakthrough performance levels with only 15 mA of supply current. With the wide supply voltage range (4.5 V to 12 V), low offset voltage (230 μV maxi-mum), wide bandwidth (600 MHz), and slew rate (310 V/μs), the ADA4899-1 is designed to work in the most demanding applications. The ADA4899-1 also features an input bias current cancellation mode that reduces input bias current by a factor of 60.

The ADA4899-1 is available in a 3 mm × 3 mm LFCSP and an 8-lead SOIC package. Both packages feature an exposed metal paddle that improves heat transfer to the ground plane, which is a significant improvement over traditional plastic packages. The ADA4899-1 is rated to work over the extended industrial temperature range, −40°C to +125°C.

Applications

* Analog-to-digital drivers

* Instrumentation

* Filters

* IF and baseband amplifiers

* DAC buffers

* Optical electronics

* Unity-gain stable

* Ultralow noise: 1 nV/√Hz, 2.6 pA/√Hz

* Ultralow distortion −117 dBc at 1 MHz

* High speed

−3 dB bandwidth: 600 MHz (G = +1)

Slew rate: 310 V/μs

* Offset voltage: 230 μV maximum

* Low input bias current: 100 nA

* Wide supply voltage range: 5 V to 12 V

* Supply current: 14.7 mA

* High performance pinout

* Disable mode