ADA4084-2 Datasheet, PDF (1/24 Pages) Analog Devices – 30 V, Low Noise, Rail-to-Rail

Data Sheet
30 V, Low Noise, Rail-to-Rail
I/O, Low Power Operational Amplifier
ADA4084-2
FEATURES
Rail-to-rail input/output
Low power: 625 µA typical
Gain bandwidth product: 15.9 MHz at AV =100 typical
Unity-gain crossover: 9.9 MHz typical
−3 dB closed-loop bandwidth: 13.9 MHz typical at ±15 V
Low offset voltage: 100 μV maximum (SOIC)
Unity-gain stable
High slew rate: 4.6 V/μs typical
Low noise: 3.9 nV/√Hz typical at 1 kHz
APPLICATIONS
Battery-powered instrumentation
Power supply control and protection
Telecommunications
DAC output amplifier
ADC input buffer
GENERAL DESCRIPTION
The ADA4084-2 is a dual, single-supply, 10 MHz bandwidth
amplifier featuring rail-to-rail inputs and outputs. It is guaran-
teed to operate from 3 V to 30 V (or ±1.5 V to ±15 V).
These amplifiers are well suited for single-supply applications
requiring both ac and precision dc performance. The combina-
tion of wide bandwidth, low noise, and precision makes the
ADA4084-2 useful in a wide variety of applications, including
filters and instrumentation.
Other applications for these amplifiers include portable telecom-
munications equipment, power supply control and protection,
and use as amplifiers or buffers for transducers with wide output
ranges. Sensors requiring a rail-to-rail input amplifier include
Hall effect, piezoelectric, and resistive transducers.
The ability to swing rail-to-rail at both the input and output
enables designers to build multistage filters in single-supply
systems and to maintain high signal-to-noise ratios.
The ADA4084-2 is specified over the industrial temperature
range of −40°C to +125°C. The dual ADA4084-2 is available in
the 8-lead SOIC and MSOP surface-mount packages.
PIN CONFIGURATIONS
ADA4084-2
OUT A 1
8 V+
–IN A 2
7 OUT B
+IN A 3
6 –IN B
V– 4
TOP VIEW
(Not to Scale)
5 +IN B
Figure 1. 8-Lead MSOP (RM)
8-Lead SOIC (R)
The ADA4084-2 is a member of a growing series of high voltage,
low noise op amps offered by Analog Devices, Inc., (see Table 1).
For a more complete selection table of low input voltage noise
amplifiers, see the AN-940 Application Note, Low Noise
Amplifier Selection Guide for Optimal Noise Performance,
available at www.analog.com.
Table 1. Low Noise Op Amps
Voltage Noise Single
1.1 nV/Hz
AD8597
1.8 nV/Hz
ADA4004-1
2.8 nV/Hz RRO¹ AD8675
2.8 nV/Hz
AD8671
3.2 nV/Hz
OP27/OP37
3.9 nV/Hz RRIO²
1 _{Rail-to-rail output.}
2 _{Rail-to-rail input/output.}
Dual
AD8599
ADA4004-2
AD8676
AD8672
ADA4084-2
Quad
ADA4004-4
AD8674
Rev. A
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