clear gifISO721, Status:ACTIVE
Single 100Mbps Digital Isolator
 
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Product Features and DescriptionFeaturesRequest Free SamplesSamplesTechnical Documents: app notes, user guides, models, and product bulletinsTechnical Documents
Quality: Product Contents, MTBF/FIT Rate and Moisture SensitivityQuality & Pb-Free DataPrice and Packaging InformationPricing/PackagingDownload Application NotesApplication Notes
related productsRelated ProductsInventory, Leadtime, and AvailabilityInventoryModels: BSDL, IBIS, or SPICESimulation Models
Tools & Software: EVMs, CCStudio, and developerTools & Software Download CAD Design ToolsSymbols/FootprintsAccess Reference DesignsReference Designs

 Datasheet
Download Datasheet
3.3 V / 5 V High-Speed Digital Isolators (Rev. E) (iso721.pdf, 711 KB)
02 May 2008 Download

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  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Product Information
Back to TopFeatures
  • 4000-V(peak) Isolation
    • UL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2)
      IEC 61010-1
    • 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

SDS is a trademark of Honeywell.
3DeviceNet is a trademark of Open Devicenet Vendors Association, Inc.

Back to TopDescription

The ISO721, ISO721M, ISO722, and ISO722M are digital isolators with a logic input and output buffer separated by a silicon oxide (SiO2) insulation barrier. This barrier provides galvanic isolation of up to 4000 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 -0°C to 125°C.

(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).

Analog eLab(TM) Design Center
Electronic Products Awards the ISO721/M Product of the Year

Customers Who Evaluated This Product Also Evaluated...

These Alternative Products:

  • ISO722: Single 100Mbps Digital Isolato...
  • ISO7221A: Dual Channel, 1/1, 1Mbps Digit...
  • ISO721M: Single 150Mbps Digital Isolato...

These Complementary Products:

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Pricing/Packaging/CAD Design Tools/Samples
Back to TopPricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Budget Price
($US) | QTY
Industry Standard
(TI Pkg)
| Pins
Top Side MarkingStandard Pack Quantity | Package CarrierSymbolsFootprintsSamples
ISO721DACTIVE-40 to 1251.75 | 100uSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintRequest Free Samples
ISO721DG4ACTIVE-40 to 1251.75 | 100uSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintRequest Free Samples
ISO721DRACTIVE-40 to 1251.75 | 100uSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ISO721DRG4ACTIVE-40 to 1251.75 | 100uSOIC (D) | 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
Back to TopTI Inventory StatusReported Distributor Inventory
ISO721DAs of 8:50 AM GMT, 20 Jul 2008As of 8:50 AM GMT, 20 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0*  8 Weeks AmericasArrow 45 Buy Now
  DigiKey 673 Buy Now
  Mouser Electronics >1k Buy Now
  Newark 127 Buy Now
  Rochester Electronics 39 Buy Now
  EuropeArrow Northern Europe 75 Buy Now
  Spoerle Buy Now
ISO721DG4As of 8:50 AM GMT, 20 Jul 2008As of 8:50 AM GMT, 20 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0*  8 Weeks AmericasMouser Electronics 220 Buy Now
ISO721DRAs of 8:50 AM GMT, 20 Jul 2008As of 8:50 AM GMT, 20 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 83*  4 WeeksNone Reported
View Distributors
  
ISO721DRG4As of 8:50 AM GMT, 20 Jul 2008As of 8:50 AM GMT, 20 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 83*  4 WeeksNone Reported
View Distributors
  
View all Distributors
 
* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.** 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
Back to TopProduct 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
* 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
Back to TopDatasheets
3.3 V / 5 V High-Speed Digital Isolators (Rev. E) (iso721.pdf, 711 KB)
02 May 2008 Download
Back to TopApplication Notes
ISO72X Digital Isolator Magnetic-Field Immunity (Rev. A) (slla181a.htm, 8 KB)
22 Feb 2006 Abstract
High-Voltage Lifetime of the ISO72x Family of Digital Isolators (slla197.htm, 8 KB)
17 Jan 2006 Abstract
The ISO72x Family of High-Speed Digital Isolators (slla198.htm, 8 KB)
11 Jan 2006 Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
24 May 2004 Abstract
Thermal and Electrical Properties of Selected Packaging Materials (sbfa010.htm, 8 KB)
04 Oct 2000 Abstract
View Application Notes for Isolators
Back to TopUser Guides
ISO72XEVM (sllu091.htm, 8 KB)
14 Jan 2006 Abstract
Back to TopSimulation Models
IBIS Model
ISO721_3 IBIS Model (sllc277.ibs, 33 KB)
18 Jan 2006 ibis /  zip
ISO721_35 IBIS Model (sllc279.ibs, 32 KB)
18 Jan 2006 ibis /  zip
ISO721_5 IBIS Model (sllc278.ibs, 34 KB)
18 Jan 2006 ibis /  zip
ISO721_53 IBIS Model (sllc280.ibs, 35 KB)
18 Jan 2006 ibis /  zip
Back to TopMore Literature
Medical Update (slyy014.pdf, 185 KB)
05 May 2006 Download

Tools & Software
Back to Top Name Part # Company Tool / Software Type
ISO72x Evaluation ModuleISO72XEVMTexas InstrumentsDevelopment Boards/EVMs

Related Products
Back to Top Alternative Products - Are similar to ISO721
Customers Who Evaluated This Product Also Evaluated...
Part #Name Comments
ISO722Single 100Mbps Digital Isolator with EnableTI customers also evaluated this product.
ISO7221ADual Channel, 1/1, 1Mbps Digital IsolatorTI customers also evaluated this product.
ISO721MSingle 150Mbps Digital Isolator TI customers also evaluated this product.
Back to Top Complementary Products - Can be used with ISO721
Part #NameProduct FamilyComments
DCP010505B Miniature, 1W Isolated Unregulated DC/DC Converters ISOLATED DC/DC CONVERTERS- 1 W AND 2 W MINIATURE   
DCH010505D Miniature, 1W, 3kVDC Isolated DC/DC Converters ISOLATED DC/DC CONVERTERS- 1 W AND 2 W MINIATURE   
ISO150 Dual, Isolated, Bi-Directional Digital Coupler INTERFACE- ISOLATORS   
Customers Who Evaluated This Product Also Evaluated...
DCH010505SMiniature, 1W, 3kVDC Isolated DC/DC ConvertersISOLATED DC/DC CONVERTERS-1 W AND 2 W MINIATURETI customers also evaluated this product.
TUSB3410RS232/IrDA Serial-to-USB ConverterUSB-USB PERIPHERALSTI customers also evaluated this product.
MAX3232E3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15kV IEC ESD ProtectionINTERFACE (SL)-RS-232 (SL)TI customers also evaluated this product.
MSP430F201316-bit Ultra-Low-Power Microcontroller, 2kB Flash, 128B RAM, 16-Bit Sigma-Delta A/D, USI for SPI/I2CMSP430 ULTRA-LOW POWER MICROCONTROLLERS-MSP430X2XX - FLASH NO LCDTI customers also evaluated this product.
CC2430System-on-Chip Solution for 2.4 GHz IEEE 802.15.4 / ZigBeeTMRF/IF AND ZIGBEE® SOLUTIONS-ZIGBEETI customers also evaluated this product.
ISO124Precision Lowest Cost Isolation AmplifierAMPLIFIERS AND LINEAR-ISOLATION AMPLIFIERSTI customers also evaluated this product.
MAX232EDual RS-232 Driver/Receiver with IEC61000-4-2 ProtectionINTERFACE (SL)-RS-232 (SL)TI customers also evaluated this product.
MSP430F161116-bit Ultra-Low-Power MCU, 48kB Flash, 10240B RAM, 12-Bit ADC, Dual DAC, 2 USART, I2C, HW Mult, DMAMSP430 ULTRA-LOW POWER MICROCONTROLLERS-MSP430X1XX - FLASH/ROM NO LCDTI customers also evaluated this product.
ADS123224-Bit, Ultra Low-Noise Analog-to-Digital ConverterDATA CONVERTERS-ANALOG TO DIGITAL CONVERTERSTI customers also evaluated this product.
TPS54105.5V to 36V Input, 1-A Step Down ConverterDC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORSTI customers also evaluated this product.
Isolated DC/DC Converter Selection Guide 
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