ISO7221B

ACTIVE

Dual-channel, 1/1, 5-Mbps digital isolator

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Product details

Parameters

Integrated isolated power No Number of channels (#) 2 Forward/reverse channels 1/1 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 5 Rating Catalog Surge voltage capability (Vpk) 4000 Current consumption per channel (DC) (Typ) (mA) 4.3 Current consumption per channel (1 Mbps) (Typ) (mA) 5 Operating temperature range (C) -40 to 125 Default output High Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3.3 Propagation delay (Typ) (ns) 55 open-in-new Find other Digital isolators

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Digital isolators

Features

  • 1, 5, 25, and 150-Mbps Signaling Rate Options
    • Low Channel-to-Channel Output Skew;
      1-ns Max
    • Low Pulse-Width Distortion (PWD); 1-ns Max
    • Low Jitter Content; 1 ns Typ at 150 Mbps
  • 50 kV/µs Typical Transient Immunity
  • Operates with 2.8-V (C-Grade),
    3.3-V, or 5-V Supplies
  • 4-kV ESD Protection
  • High Electromagnetic Immunity
  • –40°C to +125°C Operating Range
  • Typical 28-Year Life at Rated Voltage
    (see High-Voltage Lifetime of the ISO72x Family of Digital Isolators and Isolation Capacitor Lifetime Projection)
  • Safety-Related Certifications
    • VDE Basic Insulation with 4000-VPK VIOTM, 560 VPK VIORM per DIN VDE V 0884-11:2017-01 and DIN EN 61010-1 (VDE 0411-1)
    • 2500 VRMS Isolation per UL 1577
    • CSA Approved for IEC 60950-1 and IEC 62368-1

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Description

The ISO7220x and ISO7221x family devices are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220x and in opposite directions in the ISO7221x. These devices have a logic input and output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to 4000 VPK per VDE. Used in conjunction with isolated power supplies, these devices block high voltage and isolate grounds, as well as 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 every 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 small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (DC) to 150 Mbps (The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps). The A-option, B-option, and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS VCC/2 input thresholds and do not have the input noise filter and the additional propagation delay.

The ISO7220x and ISO7221x family of devices require two supply voltages of 2.8 V (C-Grade), 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 2.8-V or 3.3-V supply and all outputs are 4-mA CMOS.

The ISO7220x and ISO7221x family of devices are characterized for operation over the ambient temperature range of –40°C to +125°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 14
Type Title Date
* Datasheet ISO722x Dual-Channel Digital Isolators datasheet (Rev. P) Aug. 31, 2018
Technical articles How to select the right digital isolator for your design Oct. 21, 2020
White papers Improve Your System Performance by Replacing Optocouplers with Digital Isolators Oct. 12, 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 basic isolation for DIN VDE V 0884-11:2017-01 (Rev. Q) Sep. 20, 2019
More literature UL Certification (Rev. N) Jul. 30, 2019
Technical articles Staying on budget: How digital isolators are transforming field transmitters May 24, 2019
Application notes Digital Isolator Design Guide (Rev. B) Aug. 01, 2018
Application notes Considerations for Selecting Digital Isolators Jul. 24, 2018
User guides Dual-Channel Digital Isolator EVM (Rev. D) Jul. 08, 2013
User guides Dual-Channel Digital Isolator EVM (Rev. A) Jul. 14, 2009
User guides Dual-Channel Digital Isolator EVM Jun. 30, 2007

Design & development

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

Hardware development

EVALUATION BOARDS Download
ISO722X EVM Bench
ISO722XEVM
49
Description

This evaluation module (EVM) is used for testing the parametrics of the factory installed ISO7421 dual channel isolator. The EVM may be reconfigured by the user for use with any of the ISO7220X, ISO7221X or ISO742X dual channel isolators.

Features
  • 1,5,25 and 150-Mbps Signaling Rate Options
  • -Low Channel-to-Channel Output Skew; 1 ns max

    -Low Pulse Width Distortion (PWD); 1 ns max

    -Low Jitter Content: 1 ns Typ at 150Mbps

  • Typical 25 Year life at Rated Voltage
  • 4000Vpeak Isolation, 560Vpeak Viorm
  • - UL 1577, IEC 60747-5-2 VDE 0884, Rev 2), IEC 61010-1 (...)

Design tools & simulation

SIMULATION MODELS Download
SLLM208.ZIP (13 KB) - IBIS Model

Reference designs

REFERENCE DESIGNS Download
Type 2 PoE PSE, 6kV Lightning Surge Reference Design
TIDA-01411 — This reference design provides lightning surge protection solution for Power over Ethernet (PoE) Power Sourcing Equipment (PSE) systems based on TI's TPS23861 PSE controller. The need for implementing such protection will normally depend on the environment in which the PSE is intended to operate and (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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