ADA4899-1_16 Datasheet, PDF (1/21 Pages) Analog Devices – Unity-Gain Stable, Ultralow Distortion, 1 nV/Hz Voltage Noise, High Speed Op Amp

Data Sheet
Unity-Gain Stable, Ultralow Distortion,
1 nV/Hz Voltage Noise, High Speed Op Amp
ADA4899-1
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
GENERAL DESCRIPTION
The ADA4899-1 is an ultralow noise (1 nV/√Hz) and distortion
(<−117 dBc at 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.
CONNECTION DIAGRAMS
ADA4899-1
DISABLE 1
FEEDBACK 2
–IN 3
8 +V_S
7 V_OUT
6 NIC
+IN 4
5 –V_S
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. THE EXPOSED PAD MUST BE SOLDERED TO THE GROUND PLANE.
Figure 1. 8-Lead LFCSP (CP-8-13)
ADA4899-1
TOP VIEW
(Not to Scale)
FEEDBACK 1
–IN 2
+IN 3
–V_S 4
8 DISABLE
7 +V_S
6 V_OUT
5 –V_S
NOTES
1. THE EXPOSED PAD MUST BE SOLDERED TO THE GROUND PLANE.
Figure 2. 8-Lead SOIC (RD-8-1)
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}
–50
V_S = ±5V
R_L = 1kΩ
–60 ^{VOUT = 2V p-p}
–70
–80
–90
–100
HD3
HD2
–110
–120
–130
0.1
1
10
100
FREQUENCY (MHz)
Figure 3. Harmonic Distortion vs. Frequency
Rev. C
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