INA103

ACTIVE

Low Noise, Low Distortion Instrumentation Amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 50 Vs (Min) (V) 18 Input offset (+/-) (Max) (uV) 250 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 1 Features Current Feedback, Ultra-low noise CMRR (Min) (dB) 100 Input bias current (+/-) (Max) (nA) 12000 Iq (Typ) (mA) 9 Bandwidth at min gain (Typ) (MHz) 6 Gain error (+/-) (Max) (%) 0.25 Operating temperature range (C) -40 to 85 Type Resistor 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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Type Title Date
* Data sheet Low Noise, Low Distortion Instrumentation Amplifier datasheet Sep. 27, 2000
Technical article What is an instrumentation amplifier? Aug. 09, 2019
Application note Phantom Power with Operational Amplifiers (Rev. A) Nov. 09, 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical article How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013
Application note 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 MODEL Download
SBOC136B.TSC (92 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM008A.ZIP (14 KB) - PSpice Model
SIMULATION MODEL Download
SBOM205A.ZIP (4 KB) - TINA-TI Spice Model
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 (...)
document-generic User guide
CALCULATION TOOL 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
  • (...)

CAD/CAE symbols

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

Ordering & quality

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  • Ongoing reliability monitoring

Support & training

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