Precision Rail-to-Rail

Input and Output Operational Amplifiers

OP184/OP284/OP484

Rev. J

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FEATURES

Single-supply operation

Wide bandwidth: 4 MHz

Low offset voltage: 65 μV

Unity-gain stable

High slew rate: 4.0 V/ μs

Low noise: 3.9 nV/√Hz

APPLICATIONS

Battery-powered instrumentation

Power supply control and protection

Telecommunications

DAC output amplifier

ADC input buffer

GENERAL DESCRIPTION

The OP184/OP284/OP484 are single, dual, and quad single-supply,

4 MHz bandwidth amplifiers featuring rail-to-rail inputs and

outputs. They are guaranteed to operate from 3 V to 36 V (or

±1.5 V to ±18 V).

These amplifiers are superb for single-supply applications requiring

both ac and precision dc performance. The combination of wide

bandwidth, low noise, and precision makes the OP184/OP284/

OP484 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 OP184/OP284/OP484 are specified over the hot extended

industrial temperature range of −40°C to +125°C. 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.

PIN CONFIGURATIONS

1

2

3

4

OUT A

V+

DNC

NC

DNC

–IN A

+IN A

V–

8

7

6

5

NOTES

1. NC = NO CONNECT

2. DNC = DO NOT CONNECT

–

+

TOP VIEW

(Not to Scale)

OP184

Figure 1. 8-Lead SOIC (S-Suffix)

1

2

3

4

8

7

6

5

OUT B

–IN B

+IN B

V+

OUT A

–IN A

+IN A

V–

OP284

TOP VIEW

(Not to Scale)

Figure 2. 8-Lead PDIP (P-Suffix)

8-Lead SOIC (S-Suffix)

14

13

12

11

10

9

8

1

2

3

4

5

6

7

OUT A

–IN A

+IN A

V+

+IN B

–IN B

OUT B

OUT D

–IN D

+IN D

V–

+IN C

–IN C

OUT C

OP484

TOP VIEW

(Not to Scale)

Figure 3. 14-Lead PDIP (P-Suffix)

14-Lead Narrow-Body SOIC (S-Suffix)

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