DATASHEET
ISL28191, ISL28291
Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail
Output, Op Amp
FN6156
Rev 10.00
July 22, 2014
The ISL28191 and ISL28291 are tiny single and dual ultra-low
Features
noise, ultra-low distortion operational amplifiers. They are fully
• 1.7nV/√Hz input voltage noise at 1kHz
specified to operate down to +3V single supply. These
amplifiers have outputs that swing rail-to-rail and an input
common mode voltage that extends to ground
(ground sensing).
• 1kHz THD+N typical 0.00018% at 2V
V
P-P OUT
• Harmonic Distortion -76dBc, -70dBc, f = 1MHz
o
• 61MHz -3dB bandwidth
The ISL28191 and ISL28291 are unity gain stable with an
input referred voltage noise of 1.7nV/Hz. Both parts feature
0.00018% THD+N at 1kHz.
• 630µV maximum offset voltage
• 3µA input bias current
• 100dB typical CMRR
The ISL28191 is available in the space-saving 6 Ld UTDFN
(1.6mmx1.6mm) and 6 Ld SOT-23 packages. The ISL28291 is
available in the 8 Ld SOIC, 10 Ld 1.8mmx1.4mm UTQFN and
10 Ld MSOP packages. All devices are guaranteed over -40°C
to +125°C.
• 3V to 5.5V single supply voltage range
• Rail-to-rail output
• Ground Sensing
• Enable pin (not available in the 8 Ld SOIC package option)
• Pb-free (RoHS compliant)
Ordering Information
PART NUMBER
PART
PACKAGE
PKG.
(Note 5)
MARKING
(Pb-free)
DWG. #
Applications
• Low noise signal processing
• Low noise microphones/preamplifiers
• ADC buffers
ISL28191FHZ-T7 (Notes 1, 2) GABJ
(Note 4)
6 Ld SOT-23 P6.064A
ISL28191FRUZ-T7 (Notes 1, 3) M8
6 Ld UTDFN L6.1.6x1.6A
10 Ld MSOP M10.118A
10 Ld MSOP M10.118A
ISL28291FUZ (Note 2)
8291Z
• DAC output amplifiers
• Digital scales
ISL28291FUZ-T7 (Notes 1, 2) 8291Z
ISL28291FBZ (Note 2)
28291 FBZ 8 Ld SOIC
M8.15E
M8.15E
ISL28291FBZ-T7 (Notes 1, 2) 28291 FBZ 8 Ld SOIC
• Strain gauges/sensor amplifiers
• Radio systems
ISL28291FRUZ-T7 (Notes 1, 3) F
10 Ld UTQFN L10.1.8x1.4A
Evaluation Board
Evaluation Board
ISL28191EVAL1Z
ISL28291EVAL1Z
NOTES:
• Portable equipment
• Infrared detectors
Related Literature
• AN1343: ISL2829xEVAL1Z, ISL5529xEVAL1Z Evaluation
Board User’s Guide
1. Please refer to TB347 for details on reel specifications.
2. 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.
3. These Intersil Pb-free plastic packaged products employ special Pb-
free material sets; molding compounds/die attach materials and
NiPdAu plate - e4 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.
4. The part marking is located on the bottom of the part.
5. For Moisture Sensitivity Level (MSL), please see device information
page for ISL28191, ISL28291. For more information on MSL please
see techbrief TB363.
FN6156 Rev 10.00
July 22, 2014
Page 1 of 18
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