Features
- Rail-to-rail inputs and outputs
- 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: 10 nV/√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
Description
The ISL28134 is a single, chopper-stabilized zero drift 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-correction 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 over 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.
Parameters
| Attributes | Value |
|---|---|
| Channels (#) | 1 |
| Temp. Range (°C) | -40 to +85°C, -40 to +125°C |
| Bandwidth (MHz) | 3.5 |
| IBIAS (nA) | 0.12 |
| IS per Amp (mA) | 0.675 |
| Offset Voltage (Max) (mV) | 0.0025 |
| Slew Rate (V/µs) | 1.5 |
| Rail-to-Rail Input | Yes |
| Rail-to-Rail Output | Yes |
| Single Supply Voltage Range (V) | 2.25 - 6 |
| Gain Min | 1 |
| IOUT (A) | 0.065 |
| Noise VN (nV/√Hz) | 8 |
| AVOL (dB) | 125 |
| CMRR (dB) | 135 |
| PSRR (db) | 135 |
| Enable | No |
| Topology [Rail 1] | VFA |
| VS (Min) (V) | 2.25 |
| VS (Max) (V) | 6 |
| Thermal Shutdown | No |
| Simulation Model Available | iSim |
Application Block Diagrams
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 | Single-Stage DAB-Based Solar Microinverter The system delivers 500W of high‑density, high‑efficiency GaN‑based microinverter power. |
 | Turntable System This turntable system features a low-power MCU and RIAA preamp for precise motor and audio control. |
 | Photovoltaic (PV) Arc Detection System Real-time PV arc detection system minimizes fire risks with fast, accurate fault identification. |
 | Industrial Programmable Logic Controller (PLC) Flexible embedded programmable logic controller (PLC) designed to integrate any type of interface for end-application needs. |
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 | Smart Grid Fault Indicator Unit Low-power smart grid fault indicator with high-performance MCUs and efficient monitoring. |
Additional 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
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Support Communities
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Potentiostat circuit confusion
Dear Team, I will be using ISL28134 for implementing the circuit given below.The circuit is obtained from here. I did not completely understand the above circuit.My questions are given below. May I know how this circuit maintains the Potential at Reference Electrode and Working Electrode same. Here you ...
May 6, 2025
Knowledge Base
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Can you explain what a chopper-stabilized amplifier is and what advantages it has over a regular operational amplifier?
... amplifier input stage is modulated to a higher frequency (the chopping frequency) where the filter stage filters it out. Therefore the op amp has very low offset error and low offset drift. Its 1/f noise is also greatly reduced. This FAQ applies to ISL28133, ISL28134, ISL28233, and ISL28433.
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Do chopper amplifiers have any negative characteristics that users should know about?
... small in the ISL28XXX series of amplifiers, but it is present. Chopper-stabilized amplifiers are usually used for low frequency applications, DC measurement being most common, so this clock residue which is at much higher frequency can easily be filtered out. This FAQ applies to ISL28133, ISL28134, ISL28233, and ISL28433.
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What dictates the noise performance of the chopper amplifier?
... amplifiers will have much lower 1/f noise when compared to bipolar or non-chopped CMOS amplifiers. The following figure (Figure 21 from the ISL28134 data sheet) is the spot noise of the ISL28134 chopper-stabilized amplifier. Notice that 1/f noise is almost non-existent if compared ...
Support Communities
