Low Power Op Amps (<1 mA)

ST’s low-power op amp portfolio includes several series of op amps covering different voltage ranges, as well as many possible combinations of power consumption and gain bandwidth, providing the optimal performance for the appropriate power budget.

ST’s low-power operational amplifier solutions include widely used devices, but also provide design engineers with upgrade options such as better accuracy, a standby feature and small packages.

Low Power Op Amp

New nanopower, high-accuracy 5V op amps for low-power automotive applications

Offering very high accuracy and ultra-low power consumption with a supply voltage range of 1.5 to 5.5 V, the new AEC-Q100-qualified TSU111IY and TSU112IY op amps can be efficiently supplied by a coin-type Lithium battery or a regulated voltage in low-power automotive applications including sensor signal conditioning, and battery management systems as well as wireless and on-board chargers (OBC).

AEC-Q100 qualified high temperature (150°C) and long mission profile operational amplifier

The TSU111H is an automotive grade op amp with high accuracy, ultralow power consumption, and 23 kHz gain bandwidth. 
Packaged in a SOT23-5, the TSU111H is suitable for sensor signal conditioning, battery management systems, On Board Chargers (OBC), and wireless chargers.

TSU11 series: nano-power (900 nA), high-accuracy (150 µV) op amps

The TSU111 (single-version channel) TSU112 (dual-version channel) and TSU114 (quad-version channel) operational amplifiers offer an ultra-low power consumption per channel of 900 nA (typical) and 1.2 µA (maximum) when supplied by 3.3 V.

Combined with a supply voltage range of 1.5 to 5.5 V, these features allow the TSU11 series to be efficiently supplied by a coin-type Lithium battery or a regulated voltage in low-power applications.

The high accuracy of 150 µV (maximum) max. and 11.5 kHz gain bandwidth make these op amps ideal for sensor signal conditioning, battery-supplied or energy-harvesting applications.

TSZ12 series: ultra precision and low-power op amp for IoT applications

ST’s zero-drift op amps ideal choice for sensor and control interfaces in a wide range of battery-powered IoT applications.

The devices operate from 1.8V to 5.5V, with quiescent current below 40μA at 5V, gain-bandwidth product of 400kHz, and ultra-low input bias current.

  • The single-channel TSZ121 is pin- and package-compatible with comparable devices from other manufacturers.
  • The dual-channel TSZ122 offers popular MiniSO-8 and SO-8 packages plus the option of a miniature 2mm x 2mm DFN8.
  • The TSZ124 quad op amp in TSSOP-14 and 3mm x 3mm QFN16

The devices provide the industry’s broadest choice of zero-drift op amps.


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Signal Conditioning Design Tool

Choose design tool:

Active Filters

Handles multi-stage-designs and common topologies
Returns circuit component values
Provides gain, phase and group delay graphs
Low Pass, High Pass and Band Pass


Handles most common configurations
Returns circuit components values
Provides I/O signal waveforms
Inverting, Non Inverting, Window

Current Sensing

Returns circuit component values
Provides current error graphs