INA326:Precision, Low Drift, CMOS Instrumentation Amplifier

Recommended alternative parts
  • INA327 - ?The INA327 has shutdown and package MSOP-10
  • INA321 - ?500?V VOS, 0.5pA IB, 94dB CMRR, 60?A IQ, rail-to-rail output
  • INA337 - ?Precision, 0.4?V/°C drift, specified –40°C to +125°C
  • INA122 - ?250?V VOS, 10nA IB, 85?A IQ, rail-to-rail output, 3?V/°C drift

The INA326 and INA327 (with shutdown) are high-performance, low-cost, precision instrumentation amplifiers with rail-to-rail input and output. They are true single-supply instrumentation amplifiers with very low DC errors and input common-mode ranges that extends beyond the positive and negative rails. These features make them suitable for applications ranging from general-purpose to high-accuracy.

Excellent long-term stability and very low 1/f noise assure low offset voltage and drift throughout the life of the product.

The INA326 (without shutdown) comes in the MSOP-8 package. The INA327 (with shutdown) is offered in an MSOP-10. Both are specified over the industrial temperature range, –40°C to +85°C, with operation from –40°C to +125°C.

Features
  • PRECISION
       LOW OFFSET: 100 ?V (max)
       LOW OFFSET DRIFT: 0.4 ?V/°C (max)
       EXCELLENT LONG-TERM STABILITY
       VERY-LOW 1/f NOISE
  • TRUE RAIL-TO-RAIL I/O
       INPUT COMMON-MODE RANGE:
          20mV Below Negative Rail to 100mV Above Positive Rail
       WIDE OUTPUT SWING: Within 10mV of Rails
       SUPPLY RANGE: Single +2.7V to +5.5V
  • SMALL SIZE
       microPACKAGE: MSOP-8, MSOP-10
  • LOW COST
  • APPLICATIONS
    • LOW-LEVEL TRANSDUCER AMPLIFIER FOR BRIDGES, LOAD CELLS, THERMOCOUPLES
    • WIDE DYNAMIC RANGE SENSOR MEASUREMENTS
    • HIGH-RESOLUTION TEST SYSTEMS
    • WEIGH SCALES
    • MULTI-CHANNEL DATA ACQUISITION SYSTEMS
    • MEDICAL INSTRUMENTATION
    • GENERAL-PURPOSE
  • LOW-LEVEL TRANSDUCER AMPLIFIER FOR BRIDGES, LOAD CELLS, THERMOCOUPLES
  • WIDE DYNAMIC RANGE SENSOR MEASUREMENTS
  • HIGH-RESOLUTION TEST SYSTEMS
  • WEIGH SCALES
  • MULTI-CHANNEL DATA ACQUISITION SYSTEMS
  • MEDICAL INSTRUMENTATION
  • GENERAL-PURPOSE
Parametrics
keyINA326
Number of Channels (#)1
Vs (Min) (V)2.7
Vs (Max) (V)5.5
CMRR (Min) (dB)100
Input Offset (+/-) (Max) (uV)100
Input Offset Drift (+/-) (Max) (uV/C)0.4
Input Bias Current (+/-) (Max) (nA)2
Noise at 1kHz (Typ) (nV/rt(Hz))33
Iq (Typ) (mA)2.4
Bandwidth at Min Gain (Typ) (MHz)0.001
Gain (Min) (V/V)0.1
Gain (Max) (V/V)10000
Gain Error (+/-) (Max) (%)0.2
RatingCatalog
Operating Temperature Range (C)-40 to 85
Package GroupVSSOP
Approx. Price (US$)1.95 | 1ku
Package Size: mm2:W x L (PKG)8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
Noise at 0.1 Hz - 10 Hz (Typ) (uVpp)0.8
Gain Non-Linearity (+/-) (Max) (%)0.01
Datasheet?(1)
TitleTypeSize (KB)Date
INA326, 327: Precision, Rail-To-Rail I/O Instrumentation Amplifier (Rev. D)PDF107203 Nov 2004
Application notes?(4)
TitleTypeSize (KB)Date
A dual-polarity, bidirectional current-shunt monitorPDF70422 Oct 2008
Q4 2008 Issue Analog Applications JournalMultiple Files22 Oct 2008
Low-Cost Noise-Immune Isolated Thermocouple Signal ProcessorPDF80208 Jan 2007
Getting the most out of your instrumentation amplifier designPDF17710 Oct 2005
Selection & solution guides?(2)
TitleTypeSize (KB)Date
Analog Signal Chain Guide (Rev. B)PDF600011 Jul 2013
TI HealthTech Fitness GuidePDF359410 Apr 2013
Models?(5)
TitleTypeSize (KB)Date
INA326 PSpice Model (Rev. A)ZIP108?KB04 Oct 2011
INA326T TINA-TI Reference Design Standard-Recommended (Rev. B)TSC129?KB04 Oct 2011
INA326 TINA-TI Reference Design Enhanced Long Simulation Time (Rev. B)TSC119?KB04 Oct 2011
INA326 TINA-TI Spice Model Enhanced-Long Simulation Time (Rev. A)ZIP10?KB04 Oct 2011
INA326T TINA-TI Spice Model Standard-Recommended (Rev. A)ZIP9?KB04 Oct 2011
Development tools?(2)
NamePart#Type
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCCalculation Tools
SPICE-Based Analog Simulation ProgramTINA-TICircuit Design & Simulation
Ordering Information
Part #Preproduction / Production MaterialStatusTemp(oC)Price | QTYPackage | PinsDevice MarkingPackage QTY | Carrier
INA326EA/250ProductionACTIVE-40 to 852.20 | 1kuVSSOP?(DGK)B26250 | SMALL T&R
INA326EA/250G4ProductionACTIVE-40 to 852.20 | 1kuVSSOP?(DGK)B26250 | SMALL T&R
INA326EA/2K5ProductionACTIVE-40 to 851.95 | 1kuVSSOP?(DGK)B262500 | LARGE T&R
INA326EA/2K5G4ProductionACTIVE-40 to 851.95 | 1kuVSSOP?(DGK)B262500 | LARGE T&R
INA326, 327: Precision, Rail-To-Rail I/O Instrumentation Amplifier INA326
所选封装材料的热学和电学性质 DCP010505B
使您的仪器放大器设计达到最佳效果 ADS8321
A dual-polarity, bidirectional current-shunt monitor INA152
Q4 2008 Issue Analog Applications Journal TPS61170
Low-Cost Noise-Immune Isolated Thermocouple Signal Processor INA326
模拟信号链路产品指南 (Rev. B) BQ24392
TI HealthTech Fitness Guide ADS1298ECGFE-PDK
INA326 PSpice Model INA326
INA326T TINA-TI Reference Design Standard-Recommended INA326
INA326 TINA-TI Reference Design Enhanced Long Simulation Time INA326
INA326 TINA-TI Spice Model Enhanced-Long Simulation Time INA326
INA326T TINA-TI Spice Model Standard-Recommended INA326
INA326
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