ISO7220BD Equivalent & Substitute Parts Reference

Part Overview

The ISO7220BD is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage, 2 channels, and 5Mbps data rate in an 8-SOIC package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The ISO7220BD utilizes capacitive coupling technology with unidirectional channel configuration and operates across -40°C to 125°C temperature range.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	ISO7220BD
Product Status	Obsolete
Technology	Capacitive Coupling
Isolation Voltage	2500Vrms
Number of Channels	2
Channel Configuration	Unidirectional (2/0)
Data Rate	5Mbps
Common Mode Transient Immunity	25kV/µs
Supply Voltage	3V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ISO7220BD is determined by strict equivalence across the following critical parameters: isolation voltage (2500Vrms), number of channels (2), channel configuration (unidirectional), package type (8-SOIC), and operating temperature range. The data rate, propagation delay, and common mode transient immunity are secondary selection criteria that determine functional compatibility within specific application requirements.

Substitute parts are grouped into the following categories:

Category 1: Direct Packaging Equivalent (Same Manufacturer) ISO7220BDR from Texas Instruments maintains identical electrical specifications with alternative packaging (Cut Tape & Digi-Reel) and active product status.

Category 2: Magnetic Coupling Technology Substitutes (Analog Devices iCoupler Series) ADUM1200 series parts provide 2500Vrms isolation, 2-channel unidirectional configuration, and 8-SOIC packaging. These parts differ in data rate (1Mbps, 10Mbps, 25Mbps variants) and operating temperature maximum (105°C vs. 125°C). Magnetic coupling technology replaces capacitive coupling.

Category 3: GMR Technology Substitutes (NVE IsoLoop Series) IL 611 and IL 721T series provide 2500Vrms isolation and 8-SOIC packaging with significantly higher data rates (100Mbps, 110Mbps) and alternative coupling technology (Giant Magnetoresistive). IL 721T-3E supports extended operating temperature to 125°C.

Parameter Comparison

Part Number	Manufacturer	Technology	Data Rate	CMTI (Min)	Propagation Delay (Max)	Operating Temp	Status	Packaging
ISO7220BD	Texas Instruments	Capacitive	5Mbps	25kV/µs	70ns	-40°C ~ 125°C	Obsolete	Tube
ISO7220BDR	Texas Instruments	Capacitive	5Mbps	25kV/µs	70ns	-40°C ~ 125°C	Active	CT & Digi-Reel
ADUM1200ARZ	Analog Devices	Magnetic	1Mbps	25kV/µs	150ns	-40°C ~ 105°C	Active	Tube
ADUM1200ARZ-RL7	Analog Devices	Magnetic	1Mbps	25kV/µs	150ns	-40°C ~ 105°C	Active	CT & Digi-Reel
ADUM1200BRZ	Analog Devices	Magnetic	10Mbps	25kV/µs	50ns	-40°C ~ 105°C	Active	Tube
ADUM1200BRZ-RL7	Analog Devices	Magnetic	10Mbps	25kV/µs	50ns	-40°C ~ 105°C	Active	CT & Digi-Reel
ADUM1200CRZ	Analog Devices	Magnetic	25Mbps	25kV/µs	45ns	-40°C ~ 105°C	Active	Tube
ADUM1200CRZ-RL7	Analog Devices	Magnetic	25Mbps	25kV/µs	45ns	-40°C ~ 105°C	Active	CT & Digi-Reel
IL 611-3E	NVE Corp	GMR	100Mbps	15kV/µs	15ns	-40°C ~ 85°C	Active	Tube
IL 611-3ETR7	NVE Corp	GMR	100Mbps	15kV/µs	15ns	-40°C ~ 85°C	Active	Tape
IL 721T-3E	NVE Corp	GMR	110Mbps	100kV/µs	15ns	-40°C ~ 125°C	Active	Tube

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): ISO7220BDR is the recommended active equivalent. It maintains all electrical and thermal specifications of the obsolete ISO7220BD while offering active product status and improved supply availability. The only difference is packaging format (Cut Tape & Digi-Reel vs. Tube), which does not affect electrical performance.

For Applications Requiring Extended Temperature Range (-40°C to 125°C): IL 721T-3E from NVE provides the only alternative that matches the full operating temperature range of the original ISO7220BD. This part offers superior data rate (110Mbps), higher common mode transient immunity (100kV/µs), and GMR coupling technology. Selection requires verification that the 15kV/µs CMTI minimum (vs. 25kV/µs on ISO7220BD) is acceptable for the application.

For Applications with Temperature Limitation to -40°C to 105°C: ADUM1200 series from Analog Devices provides multiple data rate options (1Mbps, 10Mbps, 25Mbps) with magnetic coupling technology. Selection depends on required data rate: ADUM1200ARZ-RL7 for 1Mbps, ADUM1200BRZ-RL7 for 10Mbps, or ADUM1200CRZ-RL7 for 25Mbps applications.

For High-Speed Applications (100Mbps+) with Temperature Limitation to -40°C to 85°C: IL 611-3E or IL 611-3ETR7 from NVE provide 100Mbps data rate with GMR technology. These parts are suitable only for applications not requiring operation above 85°C.

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can ISO7220BDR be used as a direct replacement for ISO7220BD? A: Yes. ISO7220BDR is electrically and functionally identical to ISO7220BD. The only difference is packaging format (Cut Tape & Digi-Reel vs. Tube). Both maintain 5Mbps data rate, 2500Vrms isolation, 25kV/µs CMTI, and -40°C to 125°C operating range. ISO7220BDR has active product status.

Q: What is the primary difference between capacitive and magnetic coupling technologies in these isolators? A: The ISO7220BD uses capacitive coupling, while ADUM1200 series uses magnetic coupling (iCoupler technology). Both achieve 2500Vrms isolation and 2-channel unidirectional configuration. Magnetic coupling in ADUM1200 series provides lower propagation delay variation and different EMI characteristics. Selection depends on application-specific requirements.

Q: Why does IL 721T-3E have higher CMTI (100kV/µs) than ISO7220BD (25kV/µs)? A: IL 721T-3E uses GMR (Giant Magnetoresistive) coupling technology, which inherently provides superior common mode transient immunity compared to capacitive coupling. Higher CMTI indicates better noise immunity in high-speed switching environments.

Q: Can ADUM1200 series parts be used in applications requiring -40°C to 125°C operation? A: No. ADUM1200 series maximum operating temperature is 105°C. For applications requiring full -40°C to 125°C range, use ISO7220BDR or IL 721T-3E.

Q: What is the significance of the -RL7 suffix in part numbers like ADUM1200ARZ-RL7? A: The -RL7 suffix indicates Cut Tape & Digi-Reel packaging format. Parts without this suffix are supplied in Tube packaging. Electrical specifications are identical; packaging format differs only in supply method and reel configuration.

Q: Is IL 611-3E suitable for applications operating above 85°C? A: No. IL 611-3E maximum operating temperature is 85°C. For extended temperature operation, use IL 721T-3E (up to 125°C) or ADUM1200 series (up to 105°C).

Q: Do all substitute parts maintain the same 8-SOIC package dimensions? A: Yes. All listed substitute parts use 8-SOIC (0.154", 3.90mm Width) package, ensuring PCB layout compatibility with ISO7220BD designs.

Q: What is the data rate difference between ISO7220BD (5Mbps) and ADUM1200CRZ (25Mbps)? A: ADUM1200CRZ supports 5x higher data rate (25Mbps vs. 5Mbps) with lower propagation delay (45ns vs. 70ns). Selection depends on application bandwidth requirements. Lower data rate parts consume less power and generate less EMI.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message