Unity-Gain Stable, Ultralow Distortion,
1 nV/√Hz Voltage Noise, High Speed Op Amp
ADA4899-1
FEATURES
CONNECTION DIAGRAMS
Unity-gain stable
ADA4899-1
1
2
3
4
8
7
6
5
DISABLE
FEEDBACK
–IN
+V
S
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
V
OUT
NC
–V
+IN
S
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
NC = NO CONNECT
Figure 1. 8-Lead LFCSP_VD (CP-8-2)
ADA4899-1
1
2
3
4
8
7
6
5
FEEDBACK
–IN
DISABLE
+V
S
+IN
V
OUT
APPLICATIONS
–V
–V
S
S
Analog-to-digital drivers
Instrumentation
Filters
Figure 2. 8-Lead SOIC_N_EP (RD-8-1)
IF and baseband amplifiers
DAC buffers
Optical electronics
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 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.
–40
G = +1
V
R
V
= ±5V
= 1kΩ
S
–50
–60
L
= 2V p-p
OUT
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.
–70
–80
HD3
–90
HD2
–100
–110
–120
–130
0.1
1
10
FREQUENCY (MHz)
100
Figure 3. Harmonic Distortion vs. Frequency
Rev. B
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