For battery-powered and energy harvesting applications, the TSU111H (single high temperature) TSU111IY (single high accuracy) and TSU112IY (dual high accuracy) operational amplifiers offer ultralow 920 nA typical and 1.3 µA maximum power consumption per channel when supplied 3.3 V (for TSU111IY and TSU112IY) and 1.7 µA typical and 2.4 µA maximum when supplied 1.8 V (for TSU111H).

The high accuracy of 150 µV max. and 11.5 kHz gain bandwidth for the TSU11x and 150 µV max. and 9 kHz for the TSU111IY and TSU112IY make them ideal for sensor signal conditioning, battery-powered, and portable applications. This product family is efficiently supplied by a coin type lithium battery or a regulated voltage in low-power applications.


Application examples

auto-battery Battery management systems
charger Onboard chargers (OBC)
wireless-charger Wireless chargers
brakes Brakes & exhaust systems​

Grade 1 (125°C) for low-power automotive applications​


Available in SOT23-5 and SC70-5​


Available in DFN-8​


Key features

  • AEC-Q100 qualified for Y version
  • Submicro ampere current consumption: Icc = 920 nA typ. at 25°C
  • Low offset voltage: 150 µV max. at 25°C, 400 µV max. over full temperature range (-40 to 125°C)
  • Low noise over 0.1 to 10 Hz bandwidth: 4.6 µVpp
  • Low supply voltage: 1.5 to 5.5 V
  • Rail-to-rail input and output
  • Gain bandwidth product: 9 kHz typ.
  • Low input bias current: 10 pA max. at 25°C
  • High tolerance to ESD: 4 kV HBM
  • High accuracy without calibration

Grade 0 (150 °C) for high-temperature applications or long mission profile


Available in SOT23-5​




Key features

  • Rail-to-rail input and output
  • High temperature qualified 150°C
  • Micro ampere current consumption: ICC = 1.7 µA typ. at 25°C
  • Low offset voltage:
    • 250 µV max. at 25°C, 600 µV max. over full temperature range (-40 to 150°C)
  • Low supply voltage: 1.5 to 5.5 V
  • Gain bandwidth product: 23 kHz typ.
  • Low noise over 0.1 to 10 Hz bandwidth: 3.9 µVpp
  • AEC-Q100 qualified
  • Low input bias current: 1 pA max. at 25°C


Recommended resources


Training kit for operational amplifiers and comparators (STEVAL-CCA058V1)

Easy-to-use setup for experimenting and learning with low-frequency op-amp based applications and common op-amp based schematics.

eDSim: fast and powerful electrical simulation software for SMPS and analog ICs

Design your analog circuit, get a quick preview with fully annotated schematic and BOM, and then run the electrical simulation through eDSim for fast and accurate simulations and reliable design validation.




Operational Amplifier Quick Reference Guide

Download this very practical PDF resource covering:

  • How to 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 op-amp naming convention glossary


Operational Amplifier and Comparator Finder mobile app

A user-friendly product selector ensuring a smooth and simple navigation experience with a parametric search engine that lets you rapidly identify the appropriate operational amplifiers, comparators, or other signal conditioning devices that best fit your application. Available on Google Play, App Store, and Wandoujia.



STM32 Nucleo pack: electrochemical toxic gas sensor expansion board with CO sensor (P-NUCLEO-IKA02A)

The STM32 Nucleo gas expansion board interfaces electrochemical sensors with the MCU on the STM32 Nucleo development board. Two TSU111 operational amplifiers provide signal conditioning.

Automotive Standard Analog ICs: Robustness and Performance

This brochure presents a large portfolio of ST’s products and solutions dedicated to voltage regulation, signal amplification, current sensing, that are needed for today’s ever-growing automotive industry.