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ST's operational amplifier portfolio provides a unique choice of high performance, low power, precision op amps and tiny packages. It addresses voltages from 1.5 V to 44 V and operating temperatures from -40 to 150 °C.

Why you should choose ST Op Amps

st op amps
  • Largest micropower op-amp portfolio on the market, with consumption as low as 600 nA
  • High volume supplier of highly reliable standard and high-performance op amps
  • Space-saving packages, such as CSP, DFN, QFN, SOT-23 and SC-70

Free Webinar
Op Amps: Precision in small signal amplification

Get instant access for free to our recorded webinar (50 minutes), covering:

  • Operational amplifier basics
  • The key op-amp parameters affecting precision
  • Zero-Drift vs. standard precision amplifiers - pros and cons
  • ST operational amplifier product line and featured products
  • Other key op-amp parameters

Go to the webinar now

Wide range of operational amplifiers

Discover our ever-increasing range of op amps designed to the challenging industrial, automotive and consumer markets.

10 year longevity program
  • Low power op amps

    Operational amplifiers with exceptionally low current consumption, enabling longer battery life and designed for a large diversity of applications.

  • Precision op amps

    ST's precision op-amp solutions include zero drift amplifiers and amplifiers with a low offset drift over temperature. They are a perfect fit for use with any sensor, including gas, temperature, pressure and position sensors.

  • Low input bias current op amps

    Our portfolio is a perfect fit for any transimpedance usage or when dealing with high impedance sensors.

  • Rail-to-rail op amps

    Our rail-to-rail operational amplifier portfolio includes several series covering different voltage ranges, as well as many possible combinations of power consumption and gain bandwidth.

  • High voltage op amps

    Featuring an extended supply voltage range from 2.7 up to 36 V, our high-voltage series simplify the design of a wide variety of automotive and industrial applications: filters, power supply and motor control, actuator driving, hall effect sensors and resistive transducers.

  • High speed op amps

    ST offers a portfolio of high-end, high-speed operational amplifiers.

For Automotive applications

automotive op amps

Discover our automotive-grade op-amp portfolio featuring extreme reliability and quality demanded by automotive applications.

See all Automotive op amps

PDF - Quick Reference Guide

Download this very practical PDF resource covering:

  • How do I pick the right op amp for an application?
  • Typical op-amp applications and key parameters
  • Step-by-step op-amp selection using the ST Op Amps App
  • ST's op-amp naming convention
  • Glossary
op amp pdf guide

ST's op-amp series at a glance


operational amplifier portfolio

Questions / Answers around Op-Amps

What is op-amp offset voltage?

When a zero differential input voltage is applied, the op-amp output voltage should be zero. In practice, this is not the case. The offset voltage by definition is the differential input voltage that is required to make the output voltage zero.

What is op-amp input offset voltage?

The input offset voltage parameter, generally called VIO, is defined as a DC voltage between the non-inverting and the inverting input. It is always specified in the electrical characteristics of a datasheet. It can be positive or negative.

input offset voltage
Low input offset voltage VIO is key for high precision

The VIO value will be different for each op-amp. And to ensure good precision, it is important to choose the op-amp with the lowest VIO, because the VIO will be amplified by the gain and added to the total output voltage as an error.

Some op-amps with a chopper architecture like ST's TSZ121 exhibit a VIO of 5 µV. They are especially good for precision DC measurements.

What is input bias current of an operational amplifier?

Input bias current (IB) is the current flowing through an op-amp's inputs. Due to op-amp biasing requirements and normal operation leakage, a very small amount of current (pA or nA range, depending on the technology) is flowing through its inputs. This can cause issues when large value resistors or sources with higher output impedances are connected at the op-amp inputs. This leads to relevant voltage drops at the op-amp input and therefore errors.

What do rail-to-rail input and output mean for an op-amp?

An op-amp with a high rail input is able to deal with input signals up to +VCC. While a low rail input is able to deal with signals down to -VCC. Rail-to-rail input op-amps can handle input signals from -VCC to +VCC. Rail-to-rail output is the capability of an op-amp to drive its output very close to the power supply rails.