ISL28291 Single and Dual Ultra-Low Noise, Rail-to-Rail, Op Amp Print Friendly

ISL28291

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Single and Dual Ultra-Low Noise, Rail-to-Rail, Op Amp

Ordering Information

Available in RoHS/Pb-Free

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Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

ISL28291EVAL1Z

Active

Eval Board

N/A

ISL28291FBZ

Active

Full-Range Ind

8 Ld SOIC

2.38

ISL28291FBZ-T7

Active

Full-Range Ind

8 Ld SOIC T+R

2.38

ISL28291FRUZ-T7

Active

Full-Range Ind

10 Ld uTQFN T+R

2.38

ISL28291FUZ

Active

Full-Range Ind

10 Ld MSOP

2.38

ISL28291FUZ-T7

Active

Full-Range Ind

10 Ld MSOP T+R

2.38

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

The ISL28191 and ISL28291 are tiny single and dual ultra-low noise, ultra-low distortion operational amplifiers. They are fully 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).

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.

The ISL28191 is available in the space-saving 6 Ld μTDFN (1.6mmx1.6mm) and 6 Ld SOT-23 packages. The ISL28291 is available in the 8 Ld SOIC, 10 Ld 1.8mmx1.4mm μTQFN and 10 Ld MSOP packages. All devices are guaranteed over -40°C to +125°C.

Key Features

1.7nV/√Hz input voltage noise at 1kHz
1kHz THD+N typical 0.00018% at 2V_P-P V_OUT
Harmonic Distortion -76dBc, -70dBc, f_o = 1MHz
61MHz -3dB bandwidth
630μV maximum offset voltage
3μA input bias current
100dB typical CMRR
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)

Related Documentation

Application Note(s):
Measuring RF Interference in Audio Circuits

Datasheet(s):
Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Am

Evaluation Board(s):
ISL2829xEVAL1Z, ISL5529xEVAL1Z Evaluation Board User’s Guide

Technical Homepage:
Amplifiers/Buffers

Parametric Data


BW (MHz)		61

SR (V/μs)		17

V_S (min) (V)		3

V_S (max) (V)		5.5

I_S (per amp) (mA)		3.5

Noise V_N (nV/√Hz)		1.7

I_BIAS (μA)		6

V_OS (max) (mV)		.63

# of Devices/ Channels		2

I_OUT (mA)		130

V_OUT (V)		4.97

Rail-to-Rail Input		N

Rail-to-Rail Output		Y

PSRR (dB)		80

CMRR (dB)		100

Thermal Shutdown		N

Gain A_V (min)		1

A_VOL or A_ZOL (dB or V/mV)		98

Enable		Y

Applications

Low noise signal processing
Low noise microphones/preamplifiers
ADC buffers
DAC output amplifiers
Digital scales
Strain gauges/sensor amplifiers
Radio systems
Portable equipment
Infrared detectors

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