ISL28148

4.5MHz, Single Precision Rail-to-Rail Input-Output (RRIO) Op Amps with Very Low Input Bias Current

Product Status: Mass Production

OVERVIEW

The ISL28148, ISL28248 are 4.5MHz low-power single and dual operational amplifiers. The parts are optimized for single supply operation from 2.4V to 5.5V, allowing operation from one lithium cell or two Ni-Cd batteries.

The single and dual 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 0.25V above the positive supply and to 100mV below the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail.

The parts draw minimal supply current (900μA per amplifier) while meeting excellent DC accuracy, AC performance, noise and output drive specifications. The ISL28148 features an enable pin that can be used to turn the device off and reduce the supply current to a maximum of 16μA. Operation is guaranteed across the -40°C to +125°C temperature range.

KEY FEATURES

  • 4.5MHz gain bandwidth product
  • 900µA supply current (per amplifier)
  • 1.8mV maximum offset voltage (ISL28248)
  • 1pA typical input bias current
  • Down to 2.4V single supply operation
  • Rail-to-rail input and output
  • Enable pin (ISL28148 SOT-23 package only)
  • -40°C to +125°C operation
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL28148
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Devices/ Channels
1
Bandwidth (MHz)
4.5
Slew Rate (V/μs)
4
VS (min)
2.4 V
VS (max)
5.5 V
IS (per amp)
0.9 mA
Noise VN (nV/√Hz)
28
IBIAS
1 pA
IBIAS (max)
30 pA
Max Offset Voltage
1.8 mV
IOUT
68 mA
VOUT (V)
4.99
Rail-to-Rail Input
Yes
Rail-to-Rail Output
Yes
PSRR (dB)
98
CMRR (dB)
98
Thermal Shutdown
No
Gain Min
1
AVOL (dB)
115
Enable
Yes
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +125

Below you will find information to support the development of your application.

You can find an explanation of orderable part numbers here.

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Hardware Design Support

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