Product details

Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 4 Vos (offset voltage @ 25 C) (Max) (mV) 0.02 GBW (Typ) (MHz) 1 Features Small Size Slew rate (Typ) (V/us) 0.8 Rail-to-rail No Offset drift (Typ) (uV/C) 0.1 Iq per channel (Typ) (mA) 0.79 Vn at 1 kHz (Typ) (nV/rtHz) 8 CMRR (Typ) (dB) 140 Rating Catalog Operating temperature range (C) -40 to 85 Input bias current (Max) (pA) 1000 Output current (Typ) (mA) 35 Architecture Bipolar THD + N @ 1 kHz (Typ) (%) 0.002
Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 4 Vos (offset voltage @ 25 C) (Max) (mV) 0.02 GBW (Typ) (MHz) 1 Features Small Size Slew rate (Typ) (V/us) 0.8 Rail-to-rail No Offset drift (Typ) (uV/C) 0.1 Iq per channel (Typ) (mA) 0.79 Vn at 1 kHz (Typ) (nV/rtHz) 8 CMRR (Typ) (dB) 140 Rating Catalog Operating temperature range (C) -40 to 85 Input bias current (Max) (pA) 1000 Output current (Typ) (mA) 35 Architecture Bipolar THD + N @ 1 kHz (Typ) (%) 0.002
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 VSON (DRM) 8 16 mm² 4 x 4
  • Ultralow Offset Voltage: 10 µV
  • Ultralow Drift: ±0.1 µV/°C
  • High Open-Loop Gain: 134 dB
  • High Common-Mode Rejection: 140 dB
  • High Power Supply Rejection: 130 dB
  • Low Bias Current: 1-nA maximum
  • Wide Supply Range: ±2 V to ±18 V
  • Low Quiescent Current: 800 µA/amplifier
  • Single, Dual, and Quad Versions
  • Replaces OP-07, OP-77, and OP-177
  • Ultralow Offset Voltage: 10 µV
  • Ultralow Drift: ±0.1 µV/°C
  • High Open-Loop Gain: 134 dB
  • High Common-Mode Rejection: 140 dB
  • High Power Supply Rejection: 130 dB
  • Low Bias Current: 1-nA maximum
  • Wide Supply Range: ±2 V to ±18 V
  • Low Quiescent Current: 800 µA/amplifier
  • Single, Dual, and Quad Versions
  • Replaces OP-07, OP-77, and OP-177

The OPAx277 series precision operational amplifiers replace the industry standard OP-177. They offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultralow offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection. Single, dual, and quad versions have identical specifications, for maximum design flexibility.

OPAx277 series operational amplifiers operate from ±2-V to ±18-V supplies with excellent performance. Unlike most operational amplifiers which are specified at only one supply voltage, the OPAx277 series is specified for real-world applications; a single limit applies over the ±5-V to ±15-V supply range. High performance is maintained as the amplifiers swing to their specified limits. Because the initial offset voltage (±20 µV maximum) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications.

OPA277 operational amplifiers are easy to use and free from phase inversion and the overload problems found in some other operational amplifiers. They are stable in unity gain and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.

The OPAx277 series precision operational amplifiers replace the industry standard OP-177. They offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultralow offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection. Single, dual, and quad versions have identical specifications, for maximum design flexibility.

OPAx277 series operational amplifiers operate from ±2-V to ±18-V supplies with excellent performance. Unlike most operational amplifiers which are specified at only one supply voltage, the OPAx277 series is specified for real-world applications; a single limit applies over the ±5-V to ±15-V supply range. High performance is maintained as the amplifiers swing to their specified limits. Because the initial offset voltage (±20 µV maximum) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications.

OPA277 operational amplifiers are easy to use and free from phase inversion and the overload problems found in some other operational amplifiers. They are stable in unity gain and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.

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Technical documentation

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Type Title Date
* Data sheet OPAx277 High Precision Operational Amplifiers datasheet (Rev. B) PDF | HTML 30 Jun 2015
* Errata Errata for OPA277/2277/4277 Data Sheet SBOS079A: Improved Performance Graph 24 May 2011
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note High-Voltage Signal Conditioning for Low-Voltage ADCs (Rev. B) PDF | HTML 18 May 2015
Application note OPA277, OPA2277, OPA4277 EMI Immunity Performance (Rev. A) 31 Oct 2012
Application note High-Voltage Signal Conditioning for Low Voltage ADCs 15 Jun 2004
Application note Precision Absolute Value Circuits 02 Oct 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

User guide: PDF
Not available on TI.com
Simulation model

OPAx277 PSpice Model (Rev. H)

SBOM063H.ZIP (30 KB) - PSpice Model
Simulation model

OPAx277 TINA-TI Reference Design (Rev. G)

SBOC192G.TSC (356 KB) - TINA-TI Reference Design
Simulation model

OPAx277 TINA-TI Spice Model (Rev. F)

SBOM271F.ZIP (11 KB) - TINA-TI Spice Model
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Calculation tool

OPAMP-NOISECALC — Noise Calculator, Generator and Examples

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Reference designs

TIDA-01040 — Battery Tester Reference Design for High Current Applications

Li-Ion battery formation and electrical testing require accurate voltage and current control, usually to better than ±0.05% over the specified temperature range.  This reference design proposes a solution for high-current (up to 50 A) battery tester applications supporting input (bus) (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIPD138 — SPI programmable 16-bit, 36V, 1A Power Supply with Integrated Current Shunt

This Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a SPI controlled 36V power supply capable of sourcing 1A.  It also includes an intergrated high-side current shunt accurate to 1% across multiple decades of current load.  (...)
User guide: PDF
Schematic: PDF
Reference designs

TIPD137 — ±10V Four-Quadrant Multiplying DAC Reference Design

This TI Precision Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a dual-supply, four-quadrant MDAC solution that can accurately generate output voltages from -10V to +10V.  By removing the summing stage, this design also serves as (...)
User guide: PDF
Schematic: PDF
Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
VSON (DRM) 8 View options

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