Precision Rail-to-Rail
Input and Output Operational Amplifiers
OP184/OP284/OP484
FEATURES PIN CONFIGURATIONS
Single-supply operation
1 OP184 8 NC
Wide bandwidth: 4 MHz DNC
Low offset voltage: 65 V IN A 2 7 V+
Unity-gain stable
3 6 OUT A
+IN A
+
High slew rate: 4.0 V/ s
4 5 DNC
V
TOP VIEW
(Not to Scale)
Low noise: 3.9 nV/Hz
NOTES
1. NC = NO CONNECT
APPLICATIONS
2. DNC = DO NOT CONNECT
Figure 1. 8-Lead SOIC (S-Suffix)
Battery-powered instrumentation
Power supply control and protection
Telecommunications
OP284
OUT A 1 8 V+
DAC output amplifier
IN A 2 OUT B
7
ADC input buffer
+IN A 3 6 IN B
V 4 5 +IN B
GENERAL DESCRIPTION
TOP VIEW
(Not to Scale)
The OP184/OP284/OP484 are single, dual, and quad single-supply,
Figure 2. 8-Lead PDIP (P-Suffix)
4 MHz bandwidth amplifiers featuring rail-to-rail inputs and
8-Lead SOIC (S-Suffix)
outputs. They are guaranteed to operate from 3 V to 36 V (or
1.5 V to 18 V).
1 14
OUT A OUT D
These amplifiers are superb for single-supply applications requiring
IN A 2 13 IN D
both ac and precision dc performance. The combination of wide
+IN A 3 12 +IN D
OP484
bandwidth, low noise, and precision makes the OP184/OP284/
V+ 4 TOP VIEW 11 V
(Not to Scale)
OP484 useful in a wide variety of applications, including filters +IN B 5 10 +IN C
6
and instrumentation. IN B 9 IN C
OUT B 7 8 OUT C
Other applications for these amplifiers include portable telecom-
munications equipment, power supply control and protection,
Figure 3. 14-Lead PDIP (P-Suffix)
14-Lead Narrow-Body SOIC (S-Suffix)
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 OP184/OP284/OP484 are specified over the hot extended
industrial temperature range of 40C to +125C. The single
OP184 is available in 8-lead SOIC surface mount packages. The
dual OP284 is available in 8-lead PDIP and SOIC surface mount
packages. The quad OP484 is available in 14-lead PDIP and
14-lead, narrow-body SOIC packages.
Table 1. Low Noise Op Amps
Voltage Noise 0.9 nV 1.1 nV 1.8 nV 2.8 nV 3.2 nV 3.8 nV 3.9 nV
Single AD797 AD8597 ADA4004-1 AD8675/ADA4075-2 OP27 AD8671 OP184
Dual AD8599 ADA4004-2 AD8676 OP270 AD8672 OP284
Quad ADA4004-4 OP470 AD8674 OP484
Rev. J
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Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 19962011 Analog Devices, Inc. All rights reserved.
00293-002 00293-001
00293-003OP184/OP284/OP484
TABLE OF CONTENTS
Features .............................................................................................. 1 Output Phase Reversal ............................................................... 15
Applications ....................................................................................... 1 Designing Low Noise Circuits in Single-Supply Applications
....................................................................................................... 15
General Description ......................................................................... 1
Overdrive Recovery ................................................................... 16
Pin Configurations ........................................................................... 1
Single-Supply, 3 V Instrumentation Amplifier ...................... 16
Revision History ............................................................................... 2
2.5 V Reference from a 3 V Supply .......................................... 17
Specifications ..................................................................................... 3
5 V Only, 12-Bit DAC Swings Rail-to-Rail ............................. 17
Electrical Characteristics ............................................................. 3
High-Side Current Monitor ...................................................... 18
Absolute Maximum Ratings ............................................................ 6
Capacitive Load Drive Capability ............................................ 18
Thermal Resistance ...................................................................... 6
Low Dropout Regulator with Current Limiting ..................... 19
ESD Caution .................................................................................. 6
3 V, 50 Hz/60 Hz Active Notch Filter with False Ground ..... 20
Typical Performance Characteristics ............................................. 7
Outline Dimensions ....................................................................... 21
Applications Information .............................................................. 14
Ordering Guide .......................................................................... 23
Functional Description .............................................................. 14
Input Overvoltage Protection ................................................... 14
REVISION HISTORY
4/11Rev. I to Rev J 4/06Rev. C to Rev. D
Change to Figure 27 ....................................................................... 10
Changes to Table 1 ............................................................................. 3
Changes to Table 2 ............................................................................. 4
10/10Rev. H to Rev I
Changes to Table 3 ............................................................................. 5
Change to Output Characteristics, Output Voltage High
Deleted Reference to 1993 System Applications Guide .............. 15
Parameter, Table 2 ............................................................................. 3
3/06Rev. B to Rev. C
Change to Output Characteristics, Output Voltage High
Parameter, Table 3 ............................................................................. 4 Changes to Figure 1 Caption............................................................ 1
Changes to Table 1 ............................................................................. 3
7/10Rev. G to Rev. H Changes to Table 2 ............................................................................. 4
Added Table 1 .................................................................................... 1 Changes to Table 3 ............................................................................. 5
Changes to Table 4 ............................................................................. 6
2/09Rev. F to Rev. G Changes to Figure 5 through Figure 9 ............................................ 7
Change to Large Signal Voltage Gain, Table 3 .............................. 5 Changes to Functional Description Section ............................... 14
Updated Outline Dimensions ....................................................... 21 Deleted SPICE Macro Model ........................................................ 21
Changes to Ordering Guide .......................................................... 22 Updated Outline Dimensions ....................................................... 21
Changes to Ordering Guide .......................................................... 22
9/08Rev. E to Rev. F
9/02Rev. A to Rev. B
Changes to General Description .................................................... 1
Changes to Figure 4 .......................................................................... 6 Changes to Pin Configurations ....................................................... 1
Changes to Specifications, Input Bias Current Maximum .......... 2
Changes to Low Dropout Regulator with Current Limiting .... 20
Changes to Ordering Guide ............................................................. 5
7/08Rev. D to Rev. E
Updated Outline Dimensions ....................................................... 19
Changes to Figure 1 .......................................................................... 1
6/02Rev. 0 to Rev. A
Changes to Figure 12 ........................................................................ 8
Changes to Figure 36 and Figure 37 ............................................. 12 10/96Revision 0: Initial Version
Changes to Designing Low Noise Circuits in Single-Supply
Applications Section ....................................................................... 15
Updated Outline Dimensions ....................................................... 21
Changes to Ordering Guide .......................................................... 22
Rev. J | Page 2 of 24