Product details

Rating Catalog Integrated isolated power No Isolation rating Basic Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Default output High Data rate (max) (Mbps) 25 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4000 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (V/µs) 15000 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 5 Supply voltage (min) (V) 2.8 Propagation delay time (typ) (µs) 0.036 Current consumption per channel (DC) (typ) (mA) 4.3 Creepage (min) (mm) 4 Clearance (min) (mm) 4
Rating Catalog Integrated isolated power No Isolation rating Basic Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Default output High Data rate (max) (Mbps) 25 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4000 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (V/µs) 15000 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 5 Supply voltage (min) (V) 2.8 Propagation delay time (typ) (µs) 0.036 Current consumption per channel (DC) (typ) (mA) 4.3 Creepage (min) (mm) 4 Clearance (min) (mm) 4
SOIC (D) 8 29.4 mm² 4.9 x 6
  • 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
  • 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

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.

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

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Type Title Date
* Data sheet ISO722x Dual-Channel Digital Isolators datasheet (Rev. Q) PDF | HTML 29 Apr 2020
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 Jan 2024
Application note Digital Isolator Design Guide (Rev. G) PDF | HTML 13 Sep 2023
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. C) PDF | HTML 07 Sep 2023
Certificate CSA Certificate for ISO722xD 15 Mar 2023
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 1 (Rev. A) 05 Aug 2022
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 16 Nov 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen PDF | HTML 11 Jun 2021
EVM User's guide Universal Digital Isolator Evaluation Module PDF | HTML 04 Mar 2021
Application brief Considerations for Selecting Digital Isolators 24 Jul 2018
EVM User's guide Dual-Channel Digital Isolator EVM (Rev. D) 08 Jul 2013
EVM User's guide Dual-Channel Digital Isolator EVM (Rev. A) 14 Jul 2009
EVM User's guide Dual-Channel Digital Isolator EVM 30 Jun 2007

Design & development

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Evaluation board

DIGI-ISO-EVM — Universal digital isolator evaluation module

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Simulation model

ISO7221 IBIS Model

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Schematic: PDF
Reference designs

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