ISO7220MDRG4 Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7220MDRG4 is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage, 2 channels, and 150Mbps data rate in an 8-SOIC package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Isolation Voltage	2500Vrms
Number of Channels	2
Data Rate	150Mbps
Common Mode Transient Immunity (Min)	25kV/µs
Package / Case	8-SOIC (0.154", 3.90mm Width)
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Technology	Capacitive Coupling
Channel Type	Unidirectional

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation voltage of 2500Vrms (mandatory match)
2-channel configuration (mandatory match for direct replacement)
8-SOIC package form factor (mandatory match for PCB compatibility)
Common mode transient immunity of 25kV/µs or greater
Operating temperature range supporting -40°C to 125°C
Unidirectional channel type with 2 inputs on Side 1

Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments (same technology platform) and manufacturer-recommended alternatives from Analog Devices Inc. and NVE Corp (different coupling technologies with comparable electrical performance).

Parameter Comparison

Part Number	Manufacturer	Channels	Data Rate (Mbps)	CMTI (kV/µs)	Propagation Delay Max (ns)	Supply Voltage	Temp Range (°C)	Technology	Status
ISO7220MDRG4	Texas Instruments	2	150	25	16	3V ~ 5.5V	-40 ~ 125	Capacitive Coupling	Discontinued
ISO7220MDR	Texas Instruments	2	150	25	16	3V ~ 5.5V	-40 ~ 125	Capacitive Coupling	Active
ADUM1200ARZ-RL7	Analog Devices Inc.	2	1	25	150	2.7V ~ 5.5V	-40 ~ 105	Magnetic Coupling	Active
ADUM1200BRZ-RL7	Analog Devices Inc.	2	10	25	50	2.7V ~ 5.5V	-40 ~ 105	Magnetic Coupling	Active
ADUM1200CRZ-RL7	Analog Devices Inc.	2	25	25	45	2.7V ~ 5.5V	-40 ~ 105	Magnetic Coupling	Active
IL 611-3E	NVE Corp/Isolation Products	2	100	15	15	3V ~ 5.5V	-40 ~ 85	GMR	Active

Engineering Selection Recommendations

Direct Replacement (Recommended First Choice): ISO7220MDR is the primary substitute. It maintains identical electrical specifications, same technology platform, and identical package. Product status is active with 32,900 units in stock. This part requires no design modifications.

Alternative Substitutes (Application-Dependent): ADUM1200CRZ-RL7 provides the closest performance match among Analog Devices alternatives, supporting 25Mbps data rate with 25kV/µs CMTI. However, it operates at reduced maximum temperature (-40°C to 105°C versus -40°C to 125°C) and uses magnetic coupling technology instead of capacitive coupling. This part is suitable only if the application does not require the full 150Mbps data rate and operates within the reduced temperature range.

ADUM1200BRZ-RL7 and ADUM1200ARZ-RL7 support lower data rates (10Mbps and 1Mbps respectively) and are not recommended for applications requiring 150Mbps performance.

IL 611-3E operates at 100Mbps with 15kV/µs CMTI (below the 25kV/µs requirement) and reduced temperature range (-40°C to 85°C). This part does not meet the original specifications.

All substitute candidates maintain 2500Vrms isolation voltage, 2-channel configuration, 8-SOIC package, and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can ISO7220MDR be used as a direct drop-in replacement for ISO7220MDRG4? A: Yes. ISO7220MDR is electrically and mechanically identical to ISO7220MDRG4. Both feature 2500Vrms isolation, 2 channels, 150Mbps data rate, 25kV/µs CMTI, and 8-SOIC packaging. The only difference is product status (active versus discontinued) and packaging format (Cut Tape & Digi-Reel versus standard packaging).

Q: What is the primary limitation of ADUM1200 series alternatives? A: ADUM1200 series parts operate at significantly lower data rates (1Mbps to 25Mbps maximum) compared to the ISO7220MDRG4 (150Mbps). Additionally, they use magnetic coupling technology instead of capacitive coupling and support a reduced maximum operating temperature of 105°C versus 125°C. These parts are suitable only for low-speed isolation applications.

Q: Does IL 611-3E meet the original specifications? A: No. IL 611-3E provides 100Mbps data rate (below 150Mbps requirement) and 15kV/µs CMTI (below 25kV/µs requirement). Operating temperature range is also reduced to -40°C to 85°C. This part does not satisfy the original design requirements.

Q: Are all substitute parts available in 8-SOIC packaging? A: Yes. All listed substitutes are available in 8-SOIC (0.154", 3.90mm Width) package, ensuring PCB footprint compatibility with the original ISO7220MDRG4 design.

Q: What compliance certifications apply to substitute parts? A: All substitute parts listed maintain RoHS3 compliance, REACH Unaffected status, and ECCN EAR99 classification, matching the original part's regulatory profile.

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