Low Cost, Precision JFET

Input Operational Amplifiers

ADA4000-1/ADA4000-2/ADA4000-4

Rev. A

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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 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

part an excellent choice for high-side signal conditioning.

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

ADA4000-4 include electronic instruments, ATE amplification,

buffering, integrator circuits, instrumentation-quality photodiode

amplification, and fast precision filters (including PLL filters).

The parts also include utility functions, such as reference

buffering, level shifting, control I/O interface, power supply

control, and monitoring functions.

PIN CONFIGURATIONS

V+

5

–IN

4

ADA4000-1

TOP VIEW

(Not to Scale)

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

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

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

8

OUT B

7

–IN B

6

+IN B

5

ADA4000-2

TOP VIEW

(Not to Scale)

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

OUT D

14

–IN D

13

+IN D

12

–V

11

+IN C

10

–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)