INA146

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High-Voltage, Programmable Gain Difference Amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Min) (V) 2.76 Vs (Max) (V) 36 CMRR (Min) (dB) 76 Common mode input low (Min) (V) -100 Common mode input high (Max) (V) 100 Input offset (+/-) (Max) (uV) 5000 Iq (Typ) (mA) 0.6 Small signal bandwidth (Typ) (MHz) 0.5 Slew rate (Typ) (V/us) 0.45 Gain (Min) (V/V) 0.1 Gain (Max) (V/V) 100 Gain error (+/-) (Max) (%) 0.1 Rating Catalog Operating temperature range (C) -40 to 85 Gain drift (Max) (ppm/C) 1 open-in-new Find other Difference amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Difference amplifiers

Features

  • HIGH COMMON-MODE VOLTAGE:
    • +40V at V S = +5V
    • ±100V at V S = ±15V
  • DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
    • Set with External Resistors
  • LOW QUIESCENT CURRENT: 570µA
  • WIDE SUPPLY RANGE:
    • Single Supply: 4.5V to 36V
    • Dual Supplies: ±2.25V to ±18V
  • LOW GAIN ERROR: 0.025%
  • HIGH CMR: 80dB
  • SO-8 PACKAGE

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Description

The INA146 is a precision difference amplifier that can be used to accurately attenuate high differential voltages and reject high common-mode voltages for compatibility with common signal processing voltage levels. High-voltage capability also affords inherent input protection. The input common-mode range ex-tends beyond both supply rails, making the INA146 well-suited for both single and dual supply applica-tions.

On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection. Ex-cellent TCR tracking of these resistors assures contin-ued high precision over temperature.

A 10:1 difference amplifier provides 0.1V/V gain when the output amplifier is used as a unity-gain buffer. In this configuration, input voltages up to ±100V can be measured. Gains greater than 0.1V/V can be set with an external resistor pair without affect-ing the common-mode input range.

The INA146 is available in the SO-8 surface-mount package specified for the extended industrial tempera-ture range, -40°C to +85°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 4
Type Title Date
* Datasheet High-Voltage, Programmable Gain Difference Amplifier datasheet Sep. 27, 1999
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Application note High-Voltage Signal Conditioning for Low-Voltage ADCs (Rev. B) May 18, 2015
Technical articles Difference Amplifiers—the need for well-matched resistors Apr. 24, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
10
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 MODEL Download
SBFC027A.ZIP (5 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOC023A.ZIP (39 KB) - PSpice Model
SIMULATION MODEL Download
SBOC155B.TSC (104 KB) - TINA-TI Reference Design
SIMULATION TOOL 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 TOOL 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 (...)

Reference designs

REFERENCE DESIGNS Download
SPI programmable 16-bit, 36V, 1A Power Supply with Integrated Current Shunt
TIPD138 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.  The (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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  • Ongoing reliability monitoring

Support & training

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