1

®

FN6154.2

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

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ISL28156, ISL28256

39µA Micropower Single and Dual

Precision Rail-to-Rail Input-Output (RRIO)

Low Input Bias Current Op Amps

The ISL28156 and ISL28256 are micropower precision

operational amplifiers optimized for single supply operation

at 5V and can operated down to 2.4V.

These devices 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 0.5V above a 5.0V supply (0.25

for a 2.5V supply) and to within 10mV from ground. The

output operation is rail-to-rail.

The 1/f corner of the voltage noise spectrum is at 1kHz. This

results in low frequency noise performance which can only

be found on devices with an order of magnitude higher

supply current.

ISL28156 and ISL28256 can be operated from one lithium

cell or two Ni-Cd batteries. The input range includes both

positive and negative rail. The output swings to both rails.

Features

• 39µA typical supply current

• 5nA max input bias current

• 2.4V to 5.5V single supply voltage range

• Rail-to-rail input and output

• Enable pin (ISL28156 only)

• Pb-free plus anneal available (RoHS compliant)

Applications

• Battery- or solar-powered systems

• 4mA to 20mA current loops

• Handheld consumer products

• Medical devices

• Sensor amplifiers

• ADC buffers

• DAC output amplifiers

Ordering Information

PART NUMBER

(Note)

PART

MARKING

TAPE

AND

REEL

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL28156FHZ-T7 GABV

7” (3k pcs) 6 Ld SOT-23 MDP0038

ISL28156FBZ

28156FBZ

97/Tube

8 Ld SOIC

MDP0027

ISL28156FBZ-T7 28156FBZ

7” (1k pcs) 8 Ld SOIC

MDP0027

Coming Soon

ISL28256FAZ-T7

7” (1k pcs) 8 Ld SOIC

MDP0027

Coming Soon

ISL28256FAZ-T7

7”

8 Ld MSOP

MDP0043

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are 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.

Data Sheet

February 27, 2007