1.8 nV/√Hz, 36 V Precision Amplifiers

ADA4004-1/ADA4004-2/ADA4004-4

Rev. H

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FEATURES

Very low voltage noise: 1.8 nV/√Hz

Low input bias current: 90 nA maximum

Offset voltage: 125 µV maximum

High gain: 120 dB

Wide bandwidth: 12 MHz

5 V to 15 V operation

APPLICATIONS

Precision instrumentation

Filter blocks

Microphone preamplifiers

Industrial control

Thermocouples and RTDs

Reference buffers

GENERAL DESCRIPTION

The ADA4004-1/ADA4004-2/ADA4004-4 are 1.8 nV/√Hz

precision amplifiers featuring 40 μV offset, 0.7 μV/°C drift,

12 MHz bandwidth, and low 1.7 mA per amplifier supply current.

The ADA4004-1/ADA4004-2/ADA4004-4 are designed on the

high performance iPolar™ process, enabling improvements such

as reduced noise and power consumption, increased speed and

stability, and smaller footprint size. Novel design techniques enable

the ADA4004-1/ADA4004-2/ADA4004-4 to achieve 1.8 nV/√Hz

voltage noise density and a low 6 Hz 1/f noise corner frequency

while consuming just 1.7 mA per amplifier. The small package

saves board space, reduces cost, and improves layout flexibility.

Applications for these amplifiers include high precision controls,

PLL filters, high performance precision filters, medical and

analytical instrumentation, precision power supply controls,

ATE, and data acquisition systems. Operation is fully specified

from ±5 V to ±15 V from −40°C to +125°C.

The ADA4004-1, ADA4004-2, and ADA4004-4 are members

of a growing series of low noise op amps offered by Analog

Devices, Inc., (see Table 1).

Table 1. Voltage Noise

Pkg.

0.9 nV

1.1 nV

1.8 nV

2.8 nV

3.8 nV

Single

AD797

AD8597

ADA4004-1

AD8675

AD8671

Dual

AD8599

ADA4004-2

AD8676

AD8672

Quad

ADA4004-4

AD8674

PIN CONFIGURATIONS

OUT

1

+IN

3

V–

2

V+

5

–IN

4

ADA4004-1

TOP VIEW

(Not to Scale)

Figure 1. 5-Lead SOT

(RJ-5)

NC

1

–IN

2

+IN

3

V–

4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

ADA4004-1

TOP VIEW

(Not to Scale)

Figure 2. 8-Lead SOIC

(R-8)

OUT A 1

–IN A 2

+IN A 3

V–

4

V+

8

OUT B

7

–IN B

6

+IN B

5

ADA4004-2

TOP VIEW

(Not to Scale)

Figure 3. 8-Lead MSOP (RM-8) and 8-Lead SOIC (R-8)

1

OUT A

OUT D

14

2

–IN A

–IN D

13

3

+IN A

+IN D

12

4

V+

V–

11

5

+IN B

+IN C

10

6

–IN B

–IN C

9

7

OUT B

OUT C

8

ADA4004-4

TOP VIEW

(Not to Scale)

Figure 4. 14-Lead SOIC

(R-14)

–IN A

+IN A

V+

+IN B

–IN D

+IN D

V–

+IN C

NOTES

1. NC = NO CONNECT.

2. IT IS RECOMMENDED THAT THE EXPOSED PAD

BE CONNECTED TO V–.

12

11

10

1

3

4

9

2

ADA4004-4

TOP VIEW

(Not to Scale)

Figure 5. 16-Lead LFCSP

(CP-16-23)