ADA4084-1 Datasheet, PDF (1/35 Pages) Analog Devices – 30 V, Low Noise, Rail-to-Rail Input/Output, Low Power Operational Amplifiers

Data Sheet
30 V, Low Noise, Rail-to-Rail Input/Output,
Low Power Operational Amplifiers
ADA4084-1/ADA4084-2/ADA4084-4
FEATURES
Rail-to-rail input/output
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
High slew rate: 4.6 V/μs typical
Low noise: 3.9 nV/√Hz typical at 1 kHz
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).
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, and ADA4084-4 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 ADA4084-1, ADA4084-2, and ADA4084-4 are specified
over the industrial temperature range of −40°C to +125°C.
PIN CONNECTION DIAGRAM
ADA4084-2
OUT A 1
8 V+
–IN A 2
7 OUT B
+IN A 3
6 –IN B
V– 4
5 +IN B
NOTES
1. FOR THE LFCSP PACKAGE,
THE EXPOSED PAD MUST BE
CONNECTED TO V–.
Figure 1. ADA4084-2, 8-Lead LFCSP (CP)
See the Pin Configurations and Function Descriptions section
for additional pin configurations and information about the pin
functions.
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.
The ADA4084-1, ADA4084-2, and 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
Single
Dual
Quad
AD8597
AD8599
ADA4004-1 ADA4004-2 ADA4004-4
AD8675
AD8676
AD8671
AD8672
AD8674
OP27, OP37
ADA4084-1 ADA4084-2 ADA4084-4
Voltage Noise
1.1 nV/Hz
1.8 nV/Hz
2.8 nV/Hz rail-to-rail output
2.8 nV/Hz
3.2 nV/Hz
3.9 nV/Hz rail-to-rail
input/output
Rev. H
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