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Analoge Strommessverstärker mit integriertem Shunt-Widerstand

INA250

AKTIV

Bidirektionaler Präzisions-Strommessverstärker, 36 V, mit int. Shunt-Widerstand

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Datenblatt

INA250

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 20000, 30000, 50000, 100000 Gain error (%) 0.75 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 100 Bandwidth (kHz) 11, 35, 50 Supply voltage (max) (V) 36 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.3 Features Bidirectional, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 20000, 30000, 50000, 100000 Gain error (%) 0.75 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 100 Bandwidth (kHz) 11, 35, 50 Supply voltage (max) (V) 36 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.3 Features Bidirectional, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
TSSOP (PW) 16 32 mm² 5 x 6.4
  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2 mΩ
    • Shunt Resistor Tolerance: 0.1% (Max)
    • 15 A Continuous from –40°C to 85°C
    • 0°C to 125°C Temperature Coefficient: 10 ppm/°C
  • High Accuracy:
    • Gain Error (Shunt and Amplifier): 0.3% (Max)
    • Offset Current: 50 mA (Max, INA250A2)
  • Four Available Gains:
    • INA250A1: 200 mV/A
    • INA250A2: 500 mV/A
    • INA250A3: 800 mV/A
    • INA250A4: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to 125°C
  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2 mΩ
    • Shunt Resistor Tolerance: 0.1% (Max)
    • 15 A Continuous from –40°C to 85°C
    • 0°C to 125°C Temperature Coefficient: 10 ppm/°C
  • High Accuracy:
    • Gain Error (Shunt and Amplifier): 0.3% (Max)
    • Offset Current: 50 mA (Max, INA250A2)
  • Four Available Gains:
    • INA250A1: 200 mV/A
    • INA250A2: 500 mV/A
    • INA250A3: 800 mV/A
    • INA250A4: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to 125°C

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet INA250 36-V, Bidirectional, Precision Current Sense Amplifier With Integrated Shunt Resistor datasheet (Rev. C) PDF | HTML 13 Sep 2023
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 07 Apr 2023
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Application brief Precision, Low-Side Current Measurement (Rev. B) 06 Mär 2019
Application brief Integrated-Resistor Current Sensors Simplify PCB Design 30 Jun 2017
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Technical article How to get started with current sense amplifiers – part 3 PDF | HTML 09 Jul 2015
Design guide 30-A Range Bidirectional Current Shunt Monitor Design Guide 30 Jun 2015

Design und Entwicklung

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Evaluierungsplatine

INA250EVM — INA250 Strom-Shunt-Monitor – Evaluierungsmodul

INA250 is a family of current shunt monitor with integrated shunt. The INA250EVM (INA250AxEVM) is intended to provide basic functional evaluation of INA250A1, INA250A2, INA250A3 and INA250A4 devices in the family. The fixture layout is not intended to be a model for the target circuit, nor is it (...)

Benutzerhandbuch: PDF
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Simulationsmodell

INA250 TINA-TI Reference Design

SBOM964.TSC (612 KB) - TINA-TI Reference Design
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Simulationsmodell

INA250 TINA-TI Spice Model

SBOM963.ZIP (33 KB) - TINA-TI Spice Model
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Simulationsmodell

INA250A1 PSpice Model

SBOMBC7.ZIP (23 KB) - PSpice Model
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Simulationsmodell

INA250A2 PSpice Model

SBOMBF7.ZIP (24 KB) - PSpice Model
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Simulationsmodell

INA250A3 PSpice Model

SBOMBF5.ZIP (24 KB) - PSpice Model
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Simulationsmodell

INA250A4 PSpice Model

SBOMBC3.ZIP (24 KB) - PSpice Model
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Berechnungstool

ANALOG-ENGINEER-CALC — PC software 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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Berechnungstool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese Design- und Simulationssuite mit vollem Funktionsumfang verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
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Simulationstool

TINA-TI — SPICE-basiertes analoges Simulationsprogramm

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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Referenzdesigns

TIDA-00302 — Strom-Shunt-Monitor mit transienter Robustheit – Referenzdesign

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-010011 — Referenzdesign für hocheffiziente Stromversorgungsarchitektur für Schutzrelais-Prozessormodul

Dieses Referenzdesign zeigt verschiedene Stromversorgungsarchitekturen zur Erzeugung von mehreren Spannungsschienen für ein Anwendungsprozessormodul, das einen Laststrom > 1 A und einen hohen Wirkungsgrad benötigt. Die erforderliche Stromversorgung wird über einen 5-, 12- oder 24-V-DC-Eingang von (...)
Design guide: PDF
Schaltplan: PDF
Referenzdesigns

TIDA-00614 — Referenzdesign für bidirektionalen Strom-Shunt-Monitor (30 A)

This verified design can accurately measure current across a range of 30 A on a bus that carries up to 36-V common mode voltage over a range of -40°C to +85°C.  This design can measure current from 0 A to 30 A with a grounded reference or -30 A to 0 A with a 16-V reference.  The (...)
Design guide: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (PW) 16 Ultra Librarian
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Bestellen & Qualität

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  • Kontinuierliches Zuverlässigkeitsmonitoring
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