Dual-channel, 1/1, 1-Mbps digital isolator
Product details
Parameters
Package | Pins | Size
Features
- Highest Signaling Rate: 1 Mbps
- Low Power Consumption, Typical ICC per Channel (3.3-V operation):
- ISO7420: 1.1 mA, ISO7421: 1.5 mA
- Low Propagation Delay – 9 ns Typical
- Low Skew – 300 ps Typical
- Wide TA Range: –40°C to 125°C (M-Grade)
- 50-kV/μs Transient Immunity, Typical
- Over 25-Year Isolation Integrity at Rated Voltage
- Operates From 3.3-V and 5-V Supply and Logic Levels
- 3.3-V and 5-V Level Translation
- Narrow Body SOIC-8 Package
- Safety and Regulatory Approvals:
- 4242 VPK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
- 2500 VRMS Isolation for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
- CQC Certification per GB4943.1-2011
All other trademarks are the property of their respective owners
Description
The ISO7420, ISO7420M and ISO7421 provide galvanic isolation up to 2500 VRMS for 1 minute per UL. These digital isolators have two isolated channels. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. The suffix M indicates wide temperature range (–40°C to 125°C).
These devices have TTL input thresholds and require two supply voltages, 3.3 or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply.
Note: The ISO7420 and ISO7421 are specified for signaling rates up to 1 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration <20 ns if desired.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | ISO742x Low-Power Dual-Channel Digital Isolators datasheet (Rev. I) | Jul. 16, 2015 |
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 | |
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 | CQC Certification (Rev. F) | Sep. 13, 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 | |
User guide | Dual-Channel Digital Isolator EVM (Rev. D) | Jul. 08, 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
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
- Typical 25 Year life at Rated Voltage
- 4000Vpeak Isolation, 560Vpeak Viorm
-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
- UL 1577, IEC 60747-5-2 VDE 0884, Rev 2), IEC 61010-1 (...)
Design tools & simulation
Reference designs
Design files
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download Single-Phase Electric Meter with Isolated Energy Measurement Gerber Files.zip (212KB) -
download Single-Phase Electric Meter With Isolated Energy Measurement BOM.pdf (100KB) -
download Single-Phase Electric Meter With Isolated Energy Measurement CAD Files.zip (299KB) -
download Single-Phase Electric Meter With Isolated Energy Measurement Layer Plots.zip (452KB)
Design files
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download TIDA-00601 PCB.pdf (380KB) -
download TIDA-00601 Gerber.zip (288KB) -
download TIDA-00601 CAD Files (Rev. A).zip (350KB) -
download TIDA-00601 BOM (Rev. B).pdf (247KB)
Design files
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download TIDA-01552 BOM.pdf (41KB) -
download TIDA-01552 Assembly Drawing.pdf (429KB) -
download TIDA-01552 PCB.pdf (2519KB) -
download TIDA-01552 Altium.zip (2617KB) -
download TIDA-01552 Gerber.zip (456KB)
Design files
-
download TIDA-00447 BOM.pdf (209KB) -
download TIDA-00447 Assembly Drawing.pdf (573KB) -
download TIDA-00447 PCB.pdf (1545KB) -
download TIDA-00447 Altium.zip (666KB) -
download TIDA-00447 Gerber.zip (84KB)
Design files
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download TIDA-00472 Assembly Drawing.pdf (233KB) -
download TIDA-00472 PCB.pdf (806KB) -
download TIDA-00472 Gerber.zip (1038KB) -
download TIDA-00472 BOM (Rev. A).pdf (48KB) -
download TIDA-00472 CAD Files (Rev. A).zip (1426KB)
Design files
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download TIDA-00170 BOM.pdf (37KB) -
download TIDA-00170 Assembly Files.zip (302KB) -
download TIDA-00170 Fabrication Files.zip (1408KB) -
download TIDA-00170 PCB.pdf (3785KB) -
download TIDA-00170 CAD Files.zip (4864KB)
Design files
-
download TIDA-00236 BOM.pdf (62KB) -
download TIDA-00236 Assembly Drawing.pdf (128KB) -
download TIDA-00236 PCB.pdf (552KB) -
download TIDA-00236 Altium.zip (1017KB) -
download TIDA-00236 Gerber.zip (272KB)
Design files
-
download TIDA-00163 BOM.pdf (72KB) -
download TIDA-00163 Layer Plots.pdf (60KB) -
download TIDA-00163 Gerber.zip (32KB) -
download TIDA-00163 CAD Files.zip (41KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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