1MHz, 60µA, Rail-to-Rail I/O CMOS Operational Amplifier
1MHz, 60µA, Rail-to-Rail I/O CMOS Operational Amplifier

The SGM321 (single), SGM358 (dual) and SGM324 (quad) are low cost, voltage feedback amplifiers. These devices can operate from 2.1V to 5.5V single supply, while consuming only 60μA quiescent current per amplifier. They provide rail-to-rail input with a wide input common mode voltage range and rail-to-rail output voltage swing. This feature makes SGM321/358/324 appropriate for buffering ASIC.

The SGM321/358/324 offer a gain-bandwidth product of 1MHz and an ultra-low input bias current of 10pA. They are well suited for piezoelectric sensors, integrators and photodiode amplifiers.

The SGM321/358/324 are designed into a wide range of applications, such as battery-powered instrumentation, safety monitoring, portable systems, and transducer interface circuits in low power systems.

The SGM321 is available in Green SOT-23-5 and SC70-5 packages. The SGM358 is available in Green SOIC-8, MSOP-8 and DIP-8 packages. The SGM324 is available in Green TSSOP-14 and SOIC-14 packages. They are specified over the extended industrial temperature range (-40 to +85).



  • Low Cost

  • Input Offset Voltage: 5mV (MAX)

  • Ultra-Low Input Bias Current: 10pA

  • Unity-Gain Stable

  • Gain-Bandwidth Product: 1MHz

  • Rail-to-Rail Input and Output

  • Supply Voltage Range: 2.1V to 5.5V

  • Input Voltage Range: -0.1V to 5.6V with VS = 5.5V

  • Low Supply Current: 60μA

  • -40 to +85 Operating Temperature Range

  • Available in Green SOT-23-5 and SC70-5 Packages


ASIC Input or Output Amplifiers

Piezoelectric Transducer Amplifiers

Battery-Powered Equipment

Portable Systems

Sensor Interfaces

Medical Instrumentation

Mobile Communications

Audio Outputs

Smoke Detectors

Mobile Telephones

Notebook PCs


Part Number Status Package Pins Pb-Free Temp Range
SGM321YC5/TR Production SC70-5 5 Y -40℃ to +85℃ Samples
SGM321YN5/TR Production SOT-23-5 5 Y -40℃ to +85℃ Samples
SGM321BYN5/TR Production SOT-23-5 5 Y -40℃ to +85℃ Samples