Unity-Gain Stable, Ultralow Distortion,

1 nV/

√Hz Voltage Noise, High Speed Op Amp

ADA4899-1

Rev. B

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FEATURES

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

APPLICATIONS

Analog-to-digital drivers

Instrumentation

Filters

IF and baseband amplifiers

DAC buffers

Optical electronics

CONNECTION DIAGRAMS

1

DISABLE

ADA4899-1

2

FEEDBACK

NC = NO CONNECT

3

–IN

8

7

NC

6

5

Figure 1. 8-Lead LFCSP_VD (CP-8-2)

1

FEEDBACK

ADA4899-1

2

–IN

3

+IN

DISABLE

8

7

6

5

Figure 2. 8-Lead SOIC_N_EP (RD-8-1)

GENERAL DESCRIPTION

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.

100

10

1

0.1

–130

–120

–110

–100

–90

–80

–70

–60

–50

–40

G = +1

FREQUENCY (MHz)

HD3

HD2

Figure 3. Harmonic Distortion vs. Frequency