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INA111

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High Speed FET-Input Instrumentation Amplifier

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High Speed FET-Input Instrumentation Amplifier

INA111

ACTIVE
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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 12 Input offset (+/-) (Max) (uV) 500 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 10 Features Low bias current CMRR (Min) (dB) 106 Input offset drift (+/-) (Max) (uV/C) 5 Input bias current (+/-) (Max) (nA) 0.02 Iq (Typ) (mA) 3.3 Bandwidth at min gain (Typ) (MHz) 2 Gain error (+/-) (Max) (%) 0.5 Operating temperature range (C) -40 to 85 Type Resistor Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 1 Gain non-linearity (+/-) (Max) (%) 0.005 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (DW) 16 77 mm² 7.52 x 10.28 open-in-new Find other Instrumentation amplifiers

Features

  • FET INPUT: IB = 20pA max
  • HIGH SPEED: TS = 4us (G = 100, 0.01%)
  • LOW OFFSET VOLTAGE: 500uV max
  • LOW OFFSET VOLTAGE DRIFT: 5uV/°C max
  • HIGH COMMON-MODE REJECTION: 106dB min
  • 8-PIN PLASTIC DIP, SOL-16 SOIC
  • APPLICATIONS
    • MEDICAL INSTRUMENTATION
    • DATA ACQUISITION
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Description

The INA111 is a high speed, FET-input instrumentation amplifier offering excellent performance.

The INA111 uses a current-feedback topology providing extended bandwidth (2MHz at G = 10) and fast settling time (4us to 0.01% at G = 100). A single external resistor sets any gain from 1 to over 1000.

Offset voltage and drift are laser trimmed for excellent DC accuracy. The INA111's FET inputs reduce input bias current to under 20pA, simplifying input filtering and limiting circuitry.

The INA111 is available in 8-pin plastic DIP, and SOL-16 surface-mount packages, specified for the -40°C to +85°C temperature range.

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Technical documentation

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Type Title Date
* Data sheet High Speed FET-Input Instrumentation Amplifier datasheet Sep. 27, 2000
Technical article What is an instrumentation amplifier? Aug. 09, 2019
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

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
SBOC137B.TSC (99 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM012A.ZIP (34 KB) - PSpice Model
SIMULATION MODEL Download
SBOM206A.ZIP (5 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
  • (...)
View details
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
  • (...)
View details

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (DW) 16 View options

Ordering & quality

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