30 V, Low Noise, Rail-to-Rail Input/Output,
Low Power Operational Amplifiers
ADA4084-1/ADA4084-2/ADA4084-4
Data Sheet
FEATURES
PIN CONNECTION DIAGRAM
ADA4084-2
Rail-to-rail input/output
OUT A 1
–IN A 2
+IN A 3
V– 4
8 V+
Low power: 0.625 mA typical per amplifier at 15 V
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
7 OUT B
6 –IN B
5 +IN B
NOTES
1. FOR THE LFCSP PACKAGE,
THE EXPOSED PAD MUST BE
CONNECTED TO V–.
High slew rate: 4.6 V/µs typical
Figure 1. ADA4084-2, 8-Lead LFCSP (CP); for Additional Packages and
Models, See the Pin Configurations and Function Descriptions Section
Low noise: 3.9 nV/√Hz typical at 1 kHz
Long-term offset voltage drift (10,000 hours): 3 µV typical
Temperature hysteresis: 4 µV typical
APPLICATIONS
Battery-powered instrumentation
High-side and low-side sensing
Power supply control and protection
Telecommunications
Digital-to-analog converter (DAC) output amplifiers
Analog-to-digital converter (ADC) input buffers
GENERAL DESCRIPTION
The ADA4084-1 (single), ADA4084-2 (dual), and ADA4084-4
(quad) are single-supply, 10 MHz bandwidth amplifiers featuring
rail-to-rail inputs and outputs. They are guaranteed to operate
from +3 V to +30 V (or 1.5 V to 15 V).
The single ADA4084-1 is available in the 5-lead SOT-23 and
8-lead SOIC; the dual ADA4084-2 is available in the 8-lead
SOIC, 8-lead MSOP, and 8-lead LFCSP surface-mount
packages; and the ADA4084-4 is offered in the 14-lead TSSOP
and 16-lead LFCSP.
These amplifiers are well suited for single-supply applications
requiring both ac and precision dc performance. The combination
of wide bandwidth, low noise, and precision makes the
ADA4084-1/ADA4084-2/ADA4084-4 useful in a wide variety of
applications, including filters and instrumentation.
The ADA4084-1/ADA4084-2/ADA4084-4 are members of a
growing series of high voltage, low noise op amps offered by
Analog Devices, Inc. (see Table 1).
Table 1. Low Noise Op Amps
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.
Single
Dual
Quad
Voltage Noise
AD8597
AD8599
1.1 nV/Hz
ADA4004-1 ADA4004-2 ADA4004-4 1.8 nV/Hz
AD8675
AD8671
AD8676
AD8672
2.8 nV/Hz rail-to-rail output
2.8 nV/Hz
AD8674
OP27, OP37
3.2 nV/Hz
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.
ADA4084-1 ADA4084-2 ADA4084-4 3.9 nV/Hz rail-to-rail
input/output
The ADA4084-1/ADA4084-2/ADA4084-4 are specified over
the industrial temperature range of −40°C to +125°C.
Rev. I
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