1

®

FN6336.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved.

All other trademarks mentioned are the property of their respective owners.

ISL28138, ISL28238

4.5MHz, Single and Dual Precision

Rail-to-Rail Input-Output (RRIO) Op Amps

with Very Low Input Bias Current

The ISL28138 and ISL28238 are 4.5MHz low-power single

and dual operational amplifiers. The parts are optimized for

single supply operation from 2.4V to 5.5V, allowing operation

from one lithium cell or two Ni-Cd batteries.

The parts feature an Input Range Enhancement Circuit

(IREC) which enables them to maintain CMRR performance

for input voltages greater than the positive supply. The input

signal is capable of swinging 0.25V above the positive

supply and to 100mV below the negative supply with only a

slight degradation of the CMRR performance. The output

operation is rail-to-rail.

The parts draw minimal supply current (900µA per amplifier)

while meeting excellent DC accuracy, AC performance,

noise and output drive specifications. The ISL28138 features

an enable pin that can be used to turn the device off and

reduce the supply current to less than 20µA. Operation is

guaranteed over -40°C to +125°C temperature range.

Features

• 4.5MHz gain bandwidth product

• 900µA supply current (per amplifier)

• 300µV maximum offset voltage

• 1pA typical input bias current

• Down to 2.4V single supply voltage range

• Rail-to-rail input and output

• Output sources and sinks 60mA load current

• Enable pin (ISL28138)

• -40°C to +125°C operation

• Pb-free (RoHS compliant)

Applications

• Low-end audio

• 4mA to 20mA current loops

• Medical devices

• Sensor amplifiers

• ADC buffers

• DAC output amplifiers

Ordering Information

PART NUMBER

(Note)

PART

MARKING

PACKAGE

(Pb-free)

PKG. DWG. #

ISL28138FHZ-T7*

GABR

6 Ld SOT-23

MDP0038

ISL28138FHZ-T7A* GABR

6 Ld SOT-23

MDP0038

ISL28138FBZ

28138 FBZ

8 Ld SOIC

MDP0027

ISL28138FBZ-T7*

28138 FBZ

8 Ld SOIC

MDP0027

Coming Soon

ISL28238FBZ

28238 FBZ

8 Ld SOIC

MDP0027

Coming Soon

ISL28238FBZ-T7*

28238 FBZ

8 Ld SOIC

MDP0027

Coming Soon

ISL28238FUZ

8238Z

8 Ld MSOP

MDP0043

Coming Soon

ISL28238FUZ-T7*

8238Z

8 Ld MSOP

MDP0043

*Please refer to TB347 for details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets; molding compounds/die attach

materials and 100% matte tin plate PLUS ANNEAL - e3 termination

finish, which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.

Pinouts

ISL28138

(6 LD SOT-23)

TOP VIEW

ISL28138

(8 LD SO)

TOP VIEW

ISL28238

(8 LD SO)

TOP VIEW

ISL28238

(8 LD MSOP)

TOP VIEW

1

2

3

6

4

5

+-

OUT

V-

IN+

V+

EN

IN-

1

2

3

4

8

7

6

5

-

+

NC

IN-

IN+

EN

V+

OUT

V-

NC

1

2

3

4

8

7

6

5

OUT_A

IN-_A

IN+_A

V+

OUT_B

IN-_B

V-

IN+_B

+

-

+-

1

2

3

4

8

7

6

5

OUT_A

IN-_A

IN+_A

V+

OUT_B

IN-_B

V-

IN+_B

+

-

+-

Data Sheet

February 19, 2008