SG Micro Corp

SGM8555 Single-Supply, Single Rail-to-Rail I/O Precision Operational Amplifier


The SGM8555/6 are rail-to-rail input and output precision operational amplifiers which have low input offset voltage, and bias current. They are guaranteed to operate from 2.5V to 5.5V single supply.

The rail-to-rail input and output swings provided by the SGM8555/6 make both high-side and low-side sensing easy. The combination of characteristics makes the SGM8555/6 good choices for temperature, position and pressure sensors, medical equipment and strain gauge amplifiers, or any other 2.5V to 5.5V application requiring precision and long term stability.

The single SGM8555 is available in the Green SOT-23-5, SOIC-8 and MSOP-8 packages. The dual SGM8556 is available in the Green SOIC-8 and MSOP-8 packages. They are specified for the extended industrial/automotive (-40 to +125) temperature range.



• Low Offset Voltage: 90μV (MAX)

• Low Noise density: 21nV/ Hz at 1kHz

• Low Voltage Noise: 0.6μVP-P at 0.1Hz to 10Hz

• 3.5MHz GBP

• Slew Rate is 3V/μs

• Rail-to-Rail Input and Output Swing

• 2.5V to 5.5V Single Supply Operation

• Voltage Gain: 133dB (TYP) at +5V

• High PSRR: 96dB (TYP)

• High CMRR: 98dB (TYP)

• Ultra Low Input Bias Current: 30pA

• Low Supply Current: 950μA/Amplifier (TYP)

• Overload Recovery Time: 40μs (at VS = +5V)

• No External Capacitors Required

• -40 to +125 Operating Temperature Range

• Small Packaging:

   SGM8555 Available in Green SOT-23-5, SOIC-8

   and MSOP-8

   SGM8556 Available in Green SOIC-8 and MSOP-8


Temperature Measurements

Pressure Sensors

Precision Current Sensing

Electronic Scales

Strain Gauge Amplifiers

Medical Instrumentation

Thermocouple Amplifiers

Handheld Test Equipment


Part Number Status Package Pins Pb-Free Temp Range
SGM8555XN5G/TR Production SOT-23-5 5 Y -40℃ to +125℃ Samples
SGM8555XMS8G/TR Production MSOP-8 8 Y -40℃ to +125℃ Samples
SGM8555XS8G/TR Production SOIC-8 8 Y -40℃ to +125℃ Samples

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