FN6263 Rev 1.00

Page 1 of 18

March 30, 2007

FN6263

Rev 1.00

March 30, 2007

ISL55191, ISL55291

Single and Dual Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail, Low Power Op

Amp

DATASHEET

The ISL55191 and ISL55291 are single and dual high speed

operational amplifiers featuring low noise, low distortion, and

rail-to-rail output drive capability. They are designed to

operate with single and dual supplies from +5VDC

(±2.5VDC) down to +3VDC (±1.5VDC). These amplifiers

draw 6.1mA of quiescent supply current per amplifier. For

power conservation, this family offers a low-power shutdown

mode that reduces supply current to 21µA and places the

amplifiers' output into a high impedance state. The ISL55191

ENABLE logic places the device in the shutdown mode with

EN = 0 and the ISL55291 is placed in the shutdown mode

with EN = 1.

These amplifiers have excellent input and output overload

recovery times and outputs that swing rail-to-rail. Their input

common mode voltage range includes ground. The

ISL55191 and ISL55291 are stable at gains as low as 10

with an input referred noise voltage of 1.3nV/Hz and

harmonic distortion products -94dBc (2nd) and -104dBc

(3rd) below a 1MHz 2VP-P signal.

The ISL55191 is available in space-saving 8 Ld DFN and 8 Ld

SOIC packages. The ISL55291 is available in a 10 Ld MSOP

package.

Features

• 1.3nV/

Hz input voltage noise, fO = 1kHz

• Harmonic Distortion -94dBc, -104dBc, fO = 1MHz

• Stable at gains as low as 10

• 800MHz gain bandwidth product (AV = 10)

• 260V/µs slew rate

• 6.1mA supply current (21µA in disable mode)

• 800µV maximum offset voltage

• 12µA input bias current

• 3V to 5.5V single supply voltage range

• Rail-to-rail output

• Pb-free plus anneal available (RoHS compliant)

Applications

• High speed pulse applications

• Low noise signal processing

• ADC buffers

• DAC output amplifiers

• Radio systems

• Portable equipment

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

TAPE

AND

REEL

PACKAGE

(Pb-Free)

PKG.

DWG.

#

ISL55191IBZ

55191 IBZ

-

8 Ld SOIC

MDP0027

ISL55191IBZ-T13 55191 IBZ

13”

(2,500 pcs)

8 Ld SOIC

Tape and Reel

MDP0027

ISL55191IRZ

191Z

-

8 Ld DFN

L8.3x3D

ISL55191IRZ-T13 191Z

13”

(2,500 pcs)

8 Ld DFN

Tape and Reel

L8.3x3D

ISL55291IUZ

5291Z

-

10 Ld MSOP

MDP0043

ISL55291IUZ-T13 5291Z

13”

(2,500 pcs)

10 Ld MSOP

Tape and Reel

MDP0043

Coming Soon

ISL55191EVAL1Z

Evaluation Board

Coming Soon

ISL55291EVAL1Z

Evaluation Board

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.

TABLE 1. ENABLE LOGIC

ENABLE

DISABLE

ISL55191

EN = 1

EN = 0

ISL55291

EN = 0

EN = 1

OBSOLE

TE PROD

UCT

POSSIBL

E SUBST

ITUTE PR

ODUCT

ISL55190

, ISL5529

0