OPA171

Package | Pins | Size

SOIC (D)

19 mm² 4.9 x 3.9

SOT-23 (DBV)

5 mm² 2.9 x 1.6

SOT-5X3 (DRL)

2 mm² 1.65 x 1.2

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Features

Supply range: 2.7 to 36 V, ±1.35 V to ±18 V
Low noise: 14 nV/√Hz
Low offset drift: ±0.3 µV/°C (typical)
RFI filtered inputs
Input range includes the negative supply
Input range operates to positive supply
Rail-to-rail output
Gain bandwidth: 3 MHz
Low quiescent current: 475 µA per amplifier
High common-mode rejection: 120 dB (typical)
Low-input bias current: 8 pA
Industry-standard packages:
- 8-pin SOIC
- 8-pin MSOP
- 14-pin TSSOP
Micro packages:
- Single in SOT-553
- Dual in VSSOP-8

All trademarks are the property of their respective owners.

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The OPA171, OPA2171, and OPA4171 (OPAx171) are a family of 36-V, single-supply, low-noise operational amplifiers with the ability to operate on supplies ranging from 2.7 V (±1.35 V) to 36 V (±18 V). These devices are available in micro-packages and offer low offset, drift, and bandwidth with low quiescent current. The single, dual, and quad versions all have identical specifications for maximum design flexibility.

Unlike most operational amplifiers, which are specified at only one supply voltage, the OPAx171 family is specified from 2.7 to 36 V. Input signals beyond the supply rails do not cause phase reversal. The OPAx171 family is stable with capacitive loads up to 300 pF. The input can operate 100 mV below the negative rail and within 2 V of the top rail during normal operation. These devices can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail.

The OPAx171 series of operational amplifiers are specified from –40°C to +125°C.

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TI Precision Amplifier Quickstart Kit

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40-V, single 4.5MHz, rail-to-rail input/output, low-offset-voltage, low-noise op amp Pin-to-pin upgrade with improved performance: lower Vos(0.75mV) and noise(10nV/√Hz), higher slew rate(21V/us) and output current(75mA)

Technical documentation

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	Type	Title	Date
*	Datasheet	OPAx171 36-V, Single-Supply, SOT-553, General-Purpose Operational Amplifiers datasheet (Rev. G)	May 22, 2020
	Technical article	What is an op amp?	Jan. 21, 2020
	Application note	Using An Op Amp for High-Side Current Sensing	Mar. 22, 2019
	Application note	Non-inverting amplifier circuit (Rev. A)	Jan. 31, 2019
	Technical article	How to lay out a PCB for high-performance, low-side current-sensing designs	Feb. 06, 2018
	Technical article	Low-side current sensing for high-performance cost-sensitive applications	Jan. 22, 2018
	Technical article	Voltage and current sensing in HEV/EV applications	Nov. 22, 2017
	E-book	The Signal e-book: A compendium of blog posts on op amp design topics	Mar. 28, 2017
	Application note	OPA171 EMI Immunity Performance	Mar. 29, 2016
	More literature	Precision Amplifier Quickstart Kit brochure (Rev. A)	Jan. 13, 2015
	Application note	Compensate Transimpedance Amplifiers Intuitively (Rev. A)	Mar. 30, 2005

Design & development

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

Hardware development

EVALUATION BOARD Download

AMPQUICKKIT-EVM

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Description

The TI Precision Amplifier Quickstart Kit simplifies op amp selection, design, and evaluation with samples of six op amps and an evaluation module for prototyping surface-mount ICs. The kit is the perfect starting point for your amplifier designs.

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Features

The kit includes:

Six samples: Three low-power, low-voltage amplifiers and three low-power, wide-supply amplifiers. See the table below for the complete list.
DIP Adapter Evaluation Module (DIP-ADAPTER-EVM) for prototyping surface-mount ICs. The EVM supports the following package types: D or U (...)

DIP adapter evaluation module

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DIP-ADAPTER-EVM

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Description

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 (...)

Features

Simplifies prototyping of SMT IC’s
Supports 6 common package types
Low Cost

Universal Do-It-Yourself (DIY) Amplifier Circuit Evaluation Module

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DIYAMP-EVM

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Description

The DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is available in three industry-standard packages (SC70, SOT23, SOIC) and 12 (...)

Features

3 packages to choose from: SC70-5, SOT23-5 and SOIC-8
12 circuit configurations to choose from: Noninverting, Inverting, Active Filters, Difference Amp, Comparator and more!
Dual and single supply configurations
PCB designed for High performance: Optimized for each function
Multiple interface options (...)

OPAy171 Family PSpice Model (Rev. B)

Design tools & simulation

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SBOM440B.ZIP (14 KB) - PSpice Model

OPAy171 Family TINA-TI Spice Model (Rev. B)

SIMULATION MODEL Download

SBOM441B.ZIP (9 KB) - TINA-TI Spice Model

OPAy171 Family TINA-TI Reference Design (Rev. C)

SIMULATION MODEL Download

SBOM442C.TSC (357 KB) - TINA-TI Reference Design

PSpice® for TI design and simulation tool

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PSPICE-FOR-TI — 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 (...)

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Features

Leverages Cadence PSpice Technology
Preinstalled library with a suite of digital models to enable worst-case timing analysis
Dynamic updates ensure you have access to most current device models
Optimized for simulation speed without loss of accuracy
Supports simultaneous analysis of multiple products
(...)

SPICE-based analog simulation program

SIMULATION TOOL Download

TINA-TI — 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 (...)

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Analog engineer's calculator

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ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)

Features

Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
(...)

Simulation for Non-Inverting Amplifier Circuit

DESIGN TOOL Download

SBOC493.ZIP (10 KB)

Wi-Fi Enabled Level 1 and Level 2 Electric Vehicle Service Equipment Reference Design

Reference designs

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TIDC-EVSE-WIFI — The TIDC-EVSE-WIFI verified TI Design details how to implement J1772-compliant level 1 and level 2 electric vehicle service equipment (EVSE) with added Wi-Fi® functionality. The CC3100 network processor enables highly embedded devices like the EVSE to easily connect to an existing wireless (...)

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Schematic

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Design files

Level 1&2 Electric Vehicle Service Equipment Reference Design

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TIDA-00637 — This verified TI Design provides the foundation that you need to implement a J1772 compliant Level 1 & 2 electric vehicle service equipment. It showcases safe failure modes using TI’s peripheral drivers along with integrated fault checking. It has a configurable power delivery control and (...)

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Schematic

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Design files

download TIDA-00637 BOM.pdf (95KB)
download TIDA-00637 PCB.pdf (872KB)
download TIDA-00637 CAD Files.zip (225KB)
download TIDA-00637 Gerber.zip (299KB)

NFC Authentication for an EV Charging Station (Pile) Reference Design

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TIDC-EVSE-NFC — The TIDC-EVSE-NFC reference design showcases a straightforward integration of TI’s NFC technology with an existing EVSE platform to enable user authentication. The NFC standard comprises many different sub-technologies and working groups, making integration into a specific system (...)

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Schematic

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