ISL28291

Dual Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Amp

Product Status: Mass Production

OVERVIEW

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 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.

KEY FEATURES

  • 1.7nV/√Hz input voltage noise at 1kHz
  • 1kHz THD+N typical 0.00018% at 2VP-P VOUT
  • Harmonic Distortion -76dBc, -70dBc, fo = 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)

PARAMETRICS

Parameters
ISL28291
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Devices/ Channels
2
Bandwidth (MHz)
61
Slew Rate (V/μs)
17
VS (min)
3 V
VS (max)
5.5 V
IS (per amp)
2.6 mA
Noise VN (nV/√Hz)
1.7
IBIAS
3 µA
IBIAS (max)
6 µA
Max Offset Voltage
0.63 mV
IOUT
130 mA
VOUT (V)
4.97
Rail-to-Rail Input
-Vs
Rail-to-Rail Output
Yes
PSRR (dB)
80
CMRR (dB)
100
Thermal Shutdown
No
Gain Min
1
AVOL (dB)
98
Enable
Yes
Topology
VFA
Distortion Conditions
2Vpp, 1MHz
Output Headroom (V)
5
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +125

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