INA149-EP

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Enhanced Product High Common Mode Voltage Difference Amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Min) (V) 2 Vs (Max) (V) 18 CMRR (Min) (dB) 84 Common mode input low (Min) (V) 275 Common mode input high (Max) (V) 500 Input offset (+/-) (Max) (uV) 3500 Iq (Typ) (mA) 0.81 Small signal bandwidth (Typ) (MHz) 0.5 Slew rate (Typ) (V/us) 5 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1 Gain error (+/-) (Max) (%) 0.047 Rating HiRel Enhanced Product Operating temperature range (C) -55 to 125 Gain drift (Max) (ppm/C) 10 open-in-new Find other Difference amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Difference amplifiers

Features

  • Common-Mode Voltage Range: ±275 V
  • Minimum CMRR: 84 dB from –55°C to +125°C
  • DC Specifications:
    • Maximum Offset Voltage: 3500 µV
    • Maximum Gain Error: 0.047%
    • Maximum Gain Nonlinearity: 0.001% FSR at 25°C
  • AC Performance:
    • Bandwidth: 500 kHz
    • Typical Slew Rate: 5 V/µs
  • Wide Supply Range: ±2.0 V to ±18 V
    • Maximum Quiescent Current: 1100 µA
    • Output Swing on ±15-V Supplies: ±13.5 V
  • Input Protection:
    • Common-Mode: ±500 V
    • Differential: ±500 V
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Description

The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to
500 V.

In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation specified over the military temperature range of –55°C to +125°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet High Common-Mode Voltage Difference Amplifier, INA149-EP datasheet (Rev. A) Apr. 02, 2012
* Radiation & Reliability reports INA149AMDREP Reliability Report May 07, 2012
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
VID INA149-EP VID V6212614 Jun. 21, 2016
Technical articles Difference Amplifiers—the need for well-matched resistors Apr. 24, 2012

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
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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

Design tools & simulation

SIMULATION MODELS Download
SBOM667.TSC (164 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM668.ZIP (9 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
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 (...)
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
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
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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SOIC (D) 8 View options

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