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INA321 Status: ACTIVE

Micropower single-supply CMOS Instrumentation Amplifier


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 INA2321 INA321
CMRR(Min)(dB)90  90  
Number of Channels2  1  
Pin/Package14TSSOP  8MSOP  
Input Offset (+/-)(Max)(uV)500  500  
Input Offset Drift (+/-)(Max)(uV/Degrees Celsius)7  7  
Input Bias Current (+/-)(Max)(nA)0.01  0.01  
Noise at 1kHz(Typ)(nV/rt(Hz))100  100  
Quiescent Current (+/-)(Typ)(mA)0.04  0.04  
Settling Time to 0.01%(Typ)(us)12  12  
Gain(V/V)5 to 1000  5 to 1000  
Input TypeCMOS  CMOS  
Non-Linearity (+/-)(Max)(%)0.01  0.01  
Bandwidth at G=100(Min)(kHz)50  50  
Operating Temp Range(Celsius)-55 to 125  -55 to 125  
Vs(Min)(V)2.5  2.5  
Vs(Max)(V)5.5  5.5  
 SamplesSamples
 InventoryInventory

Customers Who Evaluated This Product Also Evaluated

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  • INA331: Low-Power, Single Supply, CMOS, Instumentation Amplifier
  • INA128: Precision, Low Power Instrumentation Amplifiers
  • INA126: Micropower Instrumentation Amplifier Single and Dual Versions
  • INA121: FET-Input, Low Power Instrumentation Amplifier

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Product Information

Features

  • LOW QUIESCENT CURRENT: 40µA/channel Shut Down: < 1µA
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXTERNAL RESISTORS
  • LOW OFFSET VOLTAGE: ±200µV
  • HIGH CMRR: 94dB
  • LOW BIAS CURRENT: 10pA
  • BANDWIDTH: 500kHz, G = 5V/V
  • RAIL-TO-RAIL OUTPUT SWING: (V+) - 0.02V
  • WIDE TEMPERATURE RANGE: -55°C to +125°C
  • SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position
    • PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

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Description

The INA321 family is a series of rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA321 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40µA. When shutdown, the INA321 has a quiescent current of less than 1µA. Returning to normal operations within nanoseconds, the shutdown feature makes the INA321 optimal for low-power battery or multiplexing applications.

Configured internally for 5V/V gain, the INA321 offers exceptional flexibility with user-programmable external gain resistors. The INA321 reduces common-mode error over frequency and with CMRR remaining high up to 3kHz, line noise and line harmonics are rejected.

The low-power design does not compromise on bandwidth or slew rate, making the INA321 ideal for driving sample Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA321 outperforms discrete designs, while offering reliability and performance.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
INA321E/250ACTIVE-55 to 1251.65 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
INA321E/250G4ACTIVE-55 to 1251.65 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
INA321E/2K5ACTIVE-55 to 1251.50 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
INA321E/2K5G4ACTIVE-55 to 1251.50 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
INA321EA/250ACTIVE-55 to 1251.20 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
INA321EA/250G4ACTIVE-55 to 1251.20 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
INA321EA/2K5ACTIVE-55 to 1251.10 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
INA321EA/2K5G4ACTIVE-55 to 1251.10 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:47 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksINA321E/250
AmericasNewark 387
AsiaFarnell Asia 387
EuropeCompel 212
WorldwideDigiKey >1k
Mouser Electronics 198
TI Lead Time*: 20 WeeksINA321E/250G4
AsiaFarnell Asia 309
EuropeFarnell 259
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksINA321E/2K5
AmericasAvnet >1k
AsiaWPI >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksINA321E/2K5G4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksINA321EA/250
AmericasAvnet 250
AsiaWPI 99
EuropeAvnet-SILICA 25
WorldwideDigiKey 77
Mouser Electronics 91
TI Lead Time*: 20 WeeksINA321EA/250G4
AsiaFarnell Asia 836
EuropeFarnell 522
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksINA321EA/2K5
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksINA321EA/2K5G4
WorldwideDigiKey  Available
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
INA321E/250 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321E/250G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321E/2K5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321E/2K5G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321EA/250 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321EA/250G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321EA/2K5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
INA321EA/2K5G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for INA321 Help

Datasheet

Application Notes

Tools & Software

NamePart # Company Tool / Software Type
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCTexas InstrumentsCalculation Utilities
SPICE-Based Analog Simulation ProgramTINA-TITexas InstrumentsSimulators
MDACBufferPro(TM) Output Buffer Amplifier Selection ToolMDACBUFFERPRO Texas Instruments Application Software 

Simulation Models

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