Low Cost, Precision JFET

Input Operational Amplifiers

Data Sheet

ADA4000-1/ADA4000-2/ADA4000-4

Rev. B

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FEATURES

High slew rate: 20 V/μs

Fast settling time

Low offset voltage: 1.70 mV maximum

Bias current: 40 pA maximum

±4 V to ±18 V operation

Low voltage noise: 16 nV/

Hz

Unity gain stable

Wide bandwidth: 5 MHz

APPLICATIONS

Reference gain/buffers

Level shift/driving

Active filters

Power line monitoring/control

Current/voltage sense or monitoring

Data acquisition

Sample-and-hold circuits

Integrators

GENERAL DESCRIPTION

The ADA4000-1/ADA4000-2/ADA4000-4 are junction field

effect transistor (JFET) input operational amplifiers featuring

precision, very low bias current, and low power. Combining

high input impedance, low input bias current, wide bandwidth,

fast slew rate, and fast settling time, the ADA4000-1/ADA4000-

2/ADA4000-4 are ideal amplifiers for driving analog-to-digital

inputs and buffering digital-to-analog converter outputs. The

input common-mode voltage includes the positive power supply,

which makes the device an excellent choice for high-side signal

conditioning.

Additional applications for the ADA4000-1/ADA4000-2/

ADA4000-4 include electronic instruments, automated test

equipment (ATE) amplification, buffering, integrator circuits,

instrumentation-quality photodiode amplification, and fast

precision filters (including phase-locked loop filters). The devices

also include utility functions, such as reference buffering, level

shifting, control input/output interface, power supply control,

and monitoring functions.

PIN CONFIGURATIONS

OUT

1

V–

2

+IN

3

V+

5

–IN

4

ADA4000-1

TOP VIEW

(Not to Scale)

Figure 1. 5-Lead TSOT (UJ-5)

NC

1

–IN

2

+IN

3

V–

4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

ADA4000-1

TOP VIEW

(Not to Scale)

Figure 2. 8-Lead SOIC (R-8)

–V

4

+V

8

OUT B

7

–IN B

6

+IN B

5

ADA4000-2

TOP VIEW

(Not to Scale)

Figure 3. 8-Lead SOIC (R-8)

–V

4

+V

8

OUT B

7

–IN B

6

+IN B

5

ADA4000-2

TOP VIEW

(Not to Scale)

Figure 4. 8-Lead MSOP (RM-8)

+V

4

OUT D

14

–IN D

13

+IN D

12

–V

11

+IN B

5

+IN C

10

–IN B

6

–IN C

9

OUT C

8

ADA4000-4

TOP VIEW

(Not to Scale)

Figure 5. 14-Lead SOIC (R-14)

ADA4000-4

1

2

3

4

5

6

7

–IN A

+IN A

+V

OUT B

–IN B

+IN B

OUT A

14

13

12

11

10

9

8

–IN D

+IN D

–V

OUT C

–IN C

+IN C

OUT D

TOP VIEW

(Not to Scale)

Figure 6. 14-Lead TSSOP (RU-14)