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OPA2277UA/2K5

Dual precision op-amp, 10uV Vos, 0.1uV/C drift, 140dB CMRR, 1MHz GBW, SOIC-8

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Manufacturer Part：

OPA2277UA/2K5

Package：

8-SOIC (4.9 x 3.9 x 1.75mm)

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Description

Product Overview

The OPA2277UA/2K5 from Texas Instruments is a dual-channel high-precision, low-power operational amplifier with 10uV offset voltage, 0.1uV/C drift, 140dB CMRR, 1MHz GBW, and +-2V to +-18V supply range in an 8-pin SOIC package on tape and reel.

Key Specifications

Manufacturer Texas Instruments
Number of Channels 2 (Dual)
Input Offset Voltage 10uV typical, 20uV max
Offset Drift +-0.1uV/C
Gain Bandwidth Product 1MHz
Slew Rate 0.8V/us
CMRR 140dB
PSRR 130dB
Open-Loop Gain 134dB
Input Bias Current 1nA max
Supply Voltage Range +-2V to +-18V
Quiescent Current 800uA/amplifier
Package 8-SOIC (4.9 x 3.9mm)
Operating Temperature -40C to +85C

Features

  • Ultra-low offset voltage: 10uV
  • Ultra-low drift: +-0.1uV/C
  • High open-loop gain: 134dB
  • High CMRR: 140dB
  • High PSRR: 130dB
  • Low bias current: 1nA max
  • Wide supply range: +-2V to +-18V
  • Low quiescent current: 800uA/amplifier
  • Replaces OP-07, OP-77, OP-177
  • Unity-gain stable

Applications

  • Precision instrumentation and measurement
  • Medical equipment
  • Industrial process control
  • Weigh scale and strain gauge amplifiers
  • Data acquisition systems

The Texas Instruments OPA2277UA/2K5 is a dual-channel precision operational amplifier that replaces the industry-standard OP-177. The OPAx277 series offers improved noise performance, wider output voltage swing, and twice the speed with half the quiescent current of its predecessors. With ultra-low offset voltage of 10uV and drift of +-0.1uV/C, the device ensures accuracy in precision applications. The 140dB CMRR and 130dB PSRR provide excellent rejection of power supply and common-mode interference. The device operates from +-2V to +-18V supplies with 800uA/amplifier quiescent current. Dual channels feature completely independent circuitry for lowest crosstalk.

The OPA2277UA/2K5 operates as a precision voltage-feedback operational amplifier with three key design elements: 1) Input Stage: A super-beta bipolar input pair with laser-trimmed offset resistors achieves 10uV typical offset voltage and 1nA max bias current. The balanced input architecture provides 140dB CMRR. 2) Gain Stage: The high-gain internal voltage amplifier provides 134dB open-loop gain, ensuring minimal gain error in closed-loop configurations. The internal compensation network ensures unity-gain stability with capacitive loads. 3) Output Stage: A Class AB output stage swings within 1V of the supply rails (RL=10kOhm) with 0.8V/us slew rate and 1MHz gain-bandwidth product. The dual channels use independent circuitry to prevent crosstalk even during overload conditions.

Pin Name Type Function
1 1OUT Output Channel A output
2 1IN- Input Channel A inverting input
3 1IN+ Input Channel A non-inverting input
4 V- Power Negative supply
5 2IN+ Input Channel B non-inverting input
6 2IN- Input Channel B inverting input
7 2OUT Output Channel B output
8 V+ Power Positive supply
  • Precision weigh scale and strain gauge signal conditioning
  • Medical instrumentation (ECG, EEG amplifiers)
  • Industrial 4-20mA transmitter signal chains
Manufacturer Part Number Package Notes
TI OPA277UA/2K5 SOIC-8 Single channel version
TI OPA4277UA SOIC-14 Quad channel version
ADI OP07ARZ SOIC-8 Legacy precision op-amp
TI OPA2206AIDR SOIC-8 +-40V overvoltage protected
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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