ISO721 Status: ACTIVE

Single 100Mbps Digital Isolator

      
         
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Datasheet

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 ISO721ISO721M ISO722 ISO722M 
Number of Channels1  1  1  1  
Channel Configuration1/0  1/0  1/0  1/0  
Insulation Rating(VRMS)2500  2500  2500  2500  
Supply Voltage(s)(V)3.3, 5  3.3, 5  3.3, 5  3.3, 5  
Datarate(Mbps)100  150  100  150  
Input Noise FilterYes  None  Yes  None  
Prop Delay(Max)(ns)24  16  24  16  
TTL/CMOS Input ThresholdTTL  CMOS  TTL  CMOS  
FootprintADuM1100  ADuM1100  ADuM1100  ADuM1100  
RatingCatalog  Catalog  Catalog  Catalog  
Operating Temp Range(Celsius)-40 to 125  -40 to 125  -40 to 125  -40 to 125  
Approx. Price (US$) 1.40 | 1ku   1.45 | 1ku   1.40 | 1ku   1.45 | 1ku  
Pin/Package8SOIC, 8SOP  8SOIC  8SOIC  8SOIC  
Thermal ShutdownNo  No  No  No  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Other qualified versions of ISO721

Version Part Number Definition
Automotive ISO721-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

Customers Who Evaluated This Product Also Evaluated

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Product Information

Features

  • 4000-V(peak) Isolation, 560-Vpeak VIORM
    • UL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2)
      IEC 61010-1, IEC 60950-1 and CSA Approved
    • 50 kV/µs Transient Immunity Typical
  • Signaling Rate 0 Mbps to 150 Mbps
    • Low Propagation Delay
    • Low Pulse Skew (Pulse-Width Distortion)
  • Low-Power Sleep Mode
  • High Electromagnetic Immunity
  • Low Input-Current Requirement
  • Failsafe Output
  • Drop-In Replacement for Most Opto and Magnetic Isolators
  • APPLICATIONS
    • Industrial Fieldbus
      • Modbus
      • Profibus
      • DeviceNet Data Buses
      • Smart Distributed Systems (SDS)
    • Computer Peripheral Interface
    • Servo Control Interface
    • Data Acquisition

(1) The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).

Description

The ISO721, ISO721M, ISO722, and ISO722M are digital isolators with a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. This barrier provides galvanic isolation of up to 400 V. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground, and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received for more than 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The symmetry of the dielectric and capacitor within the integrated circuitry provides for close capacitive matching, and allows fast transient voltage changes between the input and output grounds without corrupting the output. The small capacitance and resulting time constant provide for fast operation with signaling rates(1) from 0 Mbps (dc) to 100 Mbps for the ISO721/ISO722, and 0 Mbps to 150 Mbps with the ISO721M/ISO722M.

These devices require two supply voltages of 3.3-V, 5-V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

The ISO722 and ISO722M devices includes an active-low output enable that when driven to a high-logic level, places the output in a high-impedance state, and turns off internal bias circuitry to conserve power.

Both the ISO721 and ISO722 have TTL input thresholds and a noise-filter at the input that prevents transient pulses of up to 2 ns in duration from being passed to the output of the device.

The ISO721M and ISO722M have CMOS VCC/2 input thresholds, but do not have the noise-filter and the additional propagation delay. These features of the ISO721M also provide for reduced jitter operation.

The ISO721, ISO721M, ISO722, and ISO722M are characterized for operation over the ambient temperature range of -40°C to 125°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ISO721DACTIVE-40 to 1251.55 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
ISO721DG4ACTIVE-40 to 1251.55 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
ISO721DRACTIVE-40 to 1251.40 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ISO721DRG4ACTIVE-40 to 1251.40 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ISO721DUBACTIVE-40 to 1251.40 | 1kuSOP (DUB) | 8  50 | TUBE  Purchase Samples
ISO721DUBRACTIVE-40 to 1251.40 | 1kuSOP (DUB) | 8  350 | LARGE T&R  

* 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

  TI Inventory Status Reported Distributor Inventory
ISO721DAs of 11:26 AM GMT, 03 Jul 2009As of 11:26 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 Weeks AmericasDigiKey >1k
 Mouser Electronics 28
 Newark 221
 Rochester Electronics 39
 EuropeArrow Northern Europe 75
 Avnet-SILICA 25
 Spoerle 20
ISO721DG4As of 11:26 AM GMT, 03 Jul 2009As of 11:26 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 Weeks AmericasDigiKey  Available
 Mouser Electronics 125
 EuropeFarnell 304
ISO721DRAs of 11:26 AM GMT, 03 Jul 2009As of 11:26 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasArrow >1k
 DigiKey  Available
ISO721DRG4As of 11:26 AM GMT, 03 Jul 2009As of 11:26 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasDigiKey  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
ISO721D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO721DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO721DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO721DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO721DUB RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HRViewView
ISO721DUBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HRViewView

* 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 ISO721 Help

Datasheet

Application Notes

View Application Notes for Isolators

User Guides

Solution Guides

Simulation Models

Tools & Software

NamePart # Company Tool / Software Type
ISO72x Evaluation ModuleISO72XEVMTexas InstrumentsDevelopment Boards/EVMs

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