INA103

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Low Noise, Low Distortion Instrumentation Amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 25 Vs (Min) (V) 9 Input offset (+/-) (Max) (uV) 30 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 1 CMRR (Min) (dB) 100 Input offset drift (+/-) (Max) (uV/C) 100 Input bias current (+/-) (Max) (nA) 8000 Iq (Typ) (mA) 9 Bandwidth at min gain (Typ) (MHz) 6 Gain error (+/-) (Max) (%) 0.25 Operating temperature range (C) -40 to 85 Gain non-linearity (+/-) (Max) (%) 0.004 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (DW) 16 77 mm² 7.52 x 10.28 open-in-new Find other Instrumentation amplifiers

Features

  • LOW NOISE: 1nV/sqrt(Hz)
  • LOW THD+N: 0.0009% at 1kHz, G = 100
  • HIGH GBW: 100MHz at G = 1000
  • WIDE SUPPLY RANGE: ±9V to ±25V
  • HIGH CMRR: >110dB
  • BUILT-IN GAIN SETTING RESISTORS: G = 1, 100
  • UPGRADES AD625

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Description

The INA103 is a very low noise, low distortion monolithic instrumentation amplifier. Its current-feedback circuitry achieves very wide bandwidth and excellent dynamic response. It is ideal for low-level audio signals such as balanced low-impedance microphones. The INA103 provides near-theoretical limit noise performance for 200(ohm) source impedances. Many industrial applications also benefit from its low noise and wide bandwidth.

Unique distortion cancellation circuitry reduces distortion to extremely low levels, even in high gain. Its balanced input, low noise and low distortion provide superior performance compared to transformer-coupled microphone amplifiers used in professional audio equipment.

The INA103’s wide supply voltage (±9 to ±25V) and high output current drive allow its use in high-level audio stages as well. A copper lead frame in the plastic DIP assures excellent thermal performance.

The INA103 is available in 16-pin plastic DIP, 16-pin ceramic DIP and SOL-16 surface-mount packages. Commercial and industrial temperature range models are available.

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Technical documentation

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No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet Low Noise, Low Distortion Instrumentation Amplifier datasheet Sep. 27, 2000
Technical articles What is an instrumentation amplifier? Aug. 09, 2019
Application notes Phantom Power with Operational Amplifiers (Rev. A) Nov. 09, 2018
More literature The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Selection guides Precision Linear Audio Amplifiers Selection Guide Nov. 08, 2016
Technical articles How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
Technical articles Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013
Application notes AC Coupling Instrumentation and Difference Amplifiers Sep. 27, 2000

Design & development

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

Design tools & simulation

SIMULATION MODELS Download
SBOC136B.TSC (92 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM008.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SBOM205A.ZIP (4 KB) - TINA-TI Spice Model
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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
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
  • (...)
CALCULATION TOOLS Download
Common-Mode Input Range Calculator for Instrumentation Amplifiers
INA-CMV-CALC The Common-Mode Input Range Calculator is tool for quickly generating plots of an instrumentation amplifier’s common-mode input range vs output. The tool is compatible with both 2-amp and 3-amp instrumentation amplifiers utilizing any supply range.

The Common-Mode Input Range Calculator is pre-loaded (...)

Features
  • Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
  • Customizable supply, gain, and voltage reference options
  • Calculator displays output limitations graphically and numerically

CAD/CAE symbols

Package Pins Download
PDIP (N) 16 View options
SOIC (DW) 16 View options

Ordering & quality

Support & training

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