ISL28134

5V Ultra Low Noise, Auto-Zero Rail-to-Rail Precision Op Amp

Product Status: Mass Production

OVERVIEW

The ISL28134 is a single, auto-zeroing operational amplifier optimized for single and dual supply operation from 2.25V to 6.0V and ±1.125V and ±3.0V. The ISL28134 uses auto-zeroing circuitry to provide very low input offset voltage, drift and a reduction of the 1/f noise corner below 0.1Hz. The ISL28134 achieves ultra low offset voltage, offset temperature drift, wide gain bandwidth and rail-to-rail input/output swing while minimizing power consumption.

The ISL28134 is ideal for amplifying the sensor signals of analog front-ends that include pressure, temperature, medical, strain gauge and inertial sensors down to the µV levels.

The ISL28134 can be used over standard amplifiers with high stability across the industrial temperature range of -40°C to +85°C and the full industrial temperature range of -40°C to +125°C. The ISL28134 is available in an industry standard pinout SOIC and SOT-23 packages.

KEY FEATURES

  • CMRR at VCM = 0.1V beyond VS: 135dB, typ
  • VOH and VOL: 10mV from VS, typ
  • No 1/f noise corner down to 0.1Hz
    • Input noise voltage: 10nV/√Hz at 1kHz
    • 0.1Hz to 10Hz noise voltage: 250nVP-P
  • Low offset voltage: 2.5µV, Max
  • Superb offset drift: 15nV/°C, Max
  • Single supply: 2.25V to 6.0V
  • Dual supply: ±1.125V to ±3.0V
  • Low ICC: 675µA, typ
  • Wide bandwidth: 3.5MHz
  • Operating temperature range
    • Industrial: -40°C to +85°C
    • Full industrial: -40°C to +125°C
  • Packaging
    • Single: SOIC, SOT-23
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    APPLICATIONS

  • Medical instrumentation
  • Sensor gain amps
  • Precision low drift, low frequency ADC drivers
  • Precision voltage reference buffers
  • Thermopile, thermocouple, and other temperature sensors front-end amplifiers
  • Inertial sensors
  • Process control systems
  • Weight scales and strain gauge sensors

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL28134
Basic Information
Production Status
Mass Production
iSim Model
YES
# of Devices/ Channels
1
Bandwidth (MHz)
3.5
Slew Rate (V/μs)
1.5
VS (min)
2.25 V
VS (max)
6 V
IS (per amp)
0.675 mA
Noise VN (nV/√Hz)
8
IBIAS
120 pA
IBIAS (max)
300 pA
Max Offset Voltage
0.0025 mV
IOUT
65 mA
Rail-to-Rail Input
Yes
Rail-to-Rail Output
Yes
PSRR (dB)
135
CMRR (dB)
135
Thermal Shutdown
No
Gain Min
1
AVOL (dB)
125
Enable
No
Topology
VFA
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +125

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