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Product details

Parameters

Integrated isolated power Yes Number of channels (#) 2 Forward/reverse channels 1/1 Isolation rating (Vrms) 5000 Data rate (Max) (Mbps) 100 Rating Catalog Surge voltage capability (Vpk) 10000 Current consumption per channel (DC) (Typ) (mA) 9.5 Current consumption per channel (1 Mbps) (Typ) (mA) 11 Operating temperature range (C) -40 to 125 Default output High, Low Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 3.3 Propagation delay (Typ) (ns) 13 open-in-new Find other Digital isolators

Package | Pins | Size

SO-MOD (DWE) 16 106 mm² 10.3 x 10.3 open-in-new Find other Digital isolators

Features

  • Integrated High-Efficiency DC-DC Converter With On-Chip Transformer
  • 100 Mbps data rate
  • Robust isolation barrier:
    • >100-Year projected lifetime at 1 kVRMS working voltage
    • Up to 5000 VRMS isolation rating
    • Up to 10 kVPK surge capability
    • ±100 kV/µs minimum CMTI
  • 3-V to 5.5-V Wide Input Supply Range
  • Regulated 5-V or 3.3-V Output
  • Up to 0.65-W Output Power
  • 5 V to 5 V; 5 V to 3.3 V: Available Load Current ≥ 130 mA
  • 3.3 V to 3.3 V: Available Load Current ≥ 75 mA
  • Soft-Start to Limit Inrush Current
  • Overload and Short-Circuit Protection
  • Thermal Shutdown
  • Default Output: High and Low Options
  • Low Propagation Delay: 13 ns Typ (5-V Supply)
  • Robust Electromagnetic Compatibility (EMC)
    • System-Level ESD, EFT, and Surge Immunity
    • ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
    • Low Emissions
  • 16-pin Wide SOIC Package
  • Extended Temperature Range: –40°C to +125°C
  • Safety-Related Certifications:
    • 7071-VPK Reinforced Isolation per DIN VDE V 0884-11:2017-01
    • 5000-VRMS Isolation for 1 Minute per UL 1577
    • CSA Certification per IEC 60950-1, IEC 62368-1, and IEC 60601-1 End Equipment Standards
    • CQC Approval per GB4943.1-2011
    • TUV Certification According to EN 60950-1, EN62368-1 and EN 61010-1

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Description

The ISOW7821 device is a high-performance, dual-channel reinforced digital isolators with an integrated high-efficiency power converter. The integrated DC-DC converter provides up to 650 mW of isolated power at high efficiency and can be configured for various input and output voltage configurations. Therefore this device eliminates the need for a separate isolated power supply in space-constrained isolated designs.

The ISOW7821 device provides high electromagnetic immunity and low emissions while isolating CMOS or LVCMOS digital I/Os. The signal-isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier, whereas, power isolation uses on-chip transformers separated by thin film polymer as insulating material. Various configurations of forward and reverse channels are available. If the input signal is lost, the default output is high for the ISOW7821 device and low for the device with the F suffix (see the Device Features).

These devices help prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, electromagnetic compatibility of the ISOW7821 device has been significantly enhanced to ease system-level ESD, EFT, surge and emissions compliance. The high-efficiency of the power converter allows operation at a higher ambient temperature. The ISOW7821 device is available in a 16-pin SOIC wide-body (SOIC-WB) DWE package.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet ISOW7821 High-Performance, 5000-VRMS Reinforced Dual-Channel Digital Isolator With Integrated High-Efficiency, Low-Emissions DC-DC Converter datasheet (Rev. B) Aug. 23, 2019
Technical articles How to select the right digital isolator for your design Oct. 21, 2020
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators Oct. 12, 2020
Application note How to Isolate Signal and Power in Isolated CAN Systems (Rev. B) Oct. 08, 2020
More literature TUV certificate for isolation devices (Rev. I) Mar. 14, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
Technical articles Why signal isolation matters in 48-V HEV/EV systems Nov. 20, 2019
More literature CSA Certification (Rev. P) Nov. 19, 2019
More literature VDE certificate for reinforced isolation for DIN VDE V 0884-11:2017-01 (Rev. N) Nov. 13, 2019
Application note Overvoltage Protection for Isolated DC/DC Converter (Rev. A) Sep. 19, 2019
More literature CQC Certification (Rev. F) Sep. 13, 2019
More literature UL Certification (Rev. N) Jul. 30, 2019
Technical articles Designing compact, efficient and high performing multiparameter patient monitors Jun. 25, 2019
Application note Low-Emission Designs With ISOW7841 Integrated Signal and Power Isolator (Rev. C) Feb. 26, 2019
Application note How to isolate signal and power for an RS-485 system (Rev. B) Oct. 16, 2018
Application note How to isolate signal and power for I2C (Rev. A) Oct. 02, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
49
Description

The ISOW7841EVM is an evaluation module (EVM) used to evaluate the ISOW7841. The ISOW7841 is a high-performance, reinforced quad-channel digital isolator with integrated DC/DC converter in a wide-body SOIC package (package code, DWE). The EVM features enough test points and jumper (...)

Features
  • High-speed, robust EMC quad-channel digital isolator with integrated power of 50% efficiency
  • Wide supply & level translation range: 3 V to 5.5 V
  • High signaling rate: Up to 100 Mbps
  • Low propagation delay: 11 ns typical (5-V supplies)
  • Isolation barrier life > 25 years

Reference designs

参考设计 Download
Size and Cost Optimized Binary Module Reference Design Using Digital Isolator with Integrated Power
TIDA-00847 — The TIDA-00847 TI design showcases space and cost optimized architecture for a 4 channel DC input binary module  with improved measurement accuracy and status indication using only two TI products simplifying system design. MCU based binary module improves measurement resolution of binary input (...)
document-generic Schematic
参考设计 Download
Flat-Clamp TVS based Reference Design for Protection Against Transient for Grid Applications
TIDA-010008 — This reference design features multiple approaches for  protecting AC or DC analog input, DC analog output, AC or DC binary input, digital output with a high side or low side driver, LCD bias supply, USB interfaces (power and data) and onboard power supplies with 24, 12 or 5V input used in (...)
document-generic Schematic
参考设计 Download
Multiparameter front end reference design for vital signs patient monitor
TIDA-01614 — This reference design is for a multiparameter front end of a patient monitor that measures vital sign parameters like ECG, heart rate, SpO2 and respiration.it uses biosensing front end integrated circuits like the AFE4403 and ADS1292R devices, to measure these parameters. It also uses three TMP117 (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOIC (DWE) 16 View options

Ordering & quality

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