Product details

Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 100 Gain (Min) (V/V) 0.1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 33 Features Cost Optimized CMRR (Min) (dB) 100 Input offset drift (+/-) (Max) (uV/C) 0.4 Input bias current (+/-) (Max) (nA) 2 Iq (Typ) (mA) 2.4 Bandwidth at min gain (Typ) (MHz) 0.001 Gain error (+/-) (Max) (%) 0.2 Operating temperature range (C) -40 to 85 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.005 Output swing headroom (to positive supply) (Typ) (V) -0.005 Input common mode headroom (to negative supply) (Typ) (V) -0.02 Input common mode headroom (to positive supply) (Typ) (V) 0.1 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.8 Gain non-linearity (+/-) (Max) (%) 0.01
Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 100 Gain (Min) (V/V) 0.1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 33 Features Cost Optimized CMRR (Min) (dB) 100 Input offset drift (+/-) (Max) (uV/C) 0.4 Input bias current (+/-) (Max) (nA) 2 Iq (Typ) (mA) 2.4 Bandwidth at min gain (Typ) (MHz) 0.001 Gain error (+/-) (Max) (%) 0.2 Operating temperature range (C) -40 to 85 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.005 Output swing headroom (to positive supply) (Typ) (V) -0.005 Input common mode headroom (to negative supply) (Typ) (V) -0.02 Input common mode headroom (to positive supply) (Typ) (V) 0.1 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.8 Gain non-linearity (+/-) (Max) (%) 0.01
VSSOP (DGK) 8 15 mm² 3 x 4.9
  • PRECISION
       LOW OFFSET: 100 µV (max)
       LOW OFFSET DRIFT: 0.4 µV/°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

  • PRECISION
       LOW OFFSET: 100 µV (max)
       LOW OFFSET DRIFT: 0.4 µV/°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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet INA326, 327: Precision, Rail-To-Rail I/O Instrumentation Amplifier datasheet (Rev. D) 03 Nov 2004
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
Application note 3-decade, load-current sensing circuit (Rev. A) 01 Feb 2019
Application note Low-level voltage-to-current converter circuit 09 Jan 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013
Analog design journal A dual-polarity, bidirectional current-shunt monitor 22 Oct 2008
Analog design journal Q4 2008 Issue Analog Applications Journal 22 Oct 2008
Application note Low-Cost Noise-Immune Isolated Thermocouple Signal Processor 08 Jan 2007
Analog design journal Getting the most out of your instrumentation amplifier design 10 Oct 2005

Design & development

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Design tool

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