IL 711T-3 Digital Isolator: Equivalent & Substitute Parts

Part Overview

The IL 711T-3 is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, operating at 2500Vrms isolation voltage with 2 channels and 110Mbps data rate. This component utilizes Giant Magnetoresistive (GMR) technology and is housed in an 8-SOIC surface mount package. The part is currently active in production with 1162 units in stock.

Substitute parts are identified when design requirements permit trade-offs in data rate, common mode transient immunity (CMTI), propagation delay, or channel configuration while maintaining core isolation voltage, package form factor, and supply voltage compatibility.

Key Parameters

Parameter	IL 711T-3	Unit
Isolation Voltage	2500	Vrms
Number of Channels	2	Channels
Data Rate	110	Mbps
Common Mode Transient Immunity (Min)	100	kV/µs
Propagation Delay (tpLH / tpHL Max)	15 / 15	ns
Pulse Width Distortion (Max)	3	ns
Supply Voltage Range	3.0 ~ 5.5	V
Operating Temperature	-40 ~ 125	°C
Package / Case	8-SOIC (0.154", 3.90mm)	-
Technology	GMR (Giant Magnetoresistive)	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution logic for the IL 711T-3 is based on the following criteria:

Parametric Equivalents (IL 710T-3, IL 710T-3E): These parts share identical isolation voltage (2500Vrms), package (8-SOIC), supply voltage range (3V ~ 5.5V), CMTI (100kV/µs), data rate (110Mbps), and propagation delay specifications. The primary difference is channel count: IL 710T-3 and IL 710T-3E provide 1 channel instead of 2. These are direct substitutes when single-channel isolation is sufficient. IL 710T-3E offers RoHS3 compliance and EAR99 classification, whereas IL 711T-3 is RoHS non-compliant.

Similar Parts (ADUM1200 series, ADUM3211BRZ, ISO7220AQDRQ1): These alternatives maintain 2500Vrms isolation, 2-channel configuration, 8-SOIC package, and surface mount mounting. However, they differ in one or more of the following parameters:

Data Rate: ADUM1200ARZ (1Mbps), ADUM1200BRZ (10Mbps), ADUM1200CRZ (25Mbps), ISO7220AQDRQ1 (1Mbps)
CMTI: ADUM series and ISO7220AQDRQ1 (25kV/µs vs. IL 711T-3 at 100kV/µs)
Propagation Delay: ADUM series (45-150ns vs. IL 711T-3 at 15ns), ISO7220AQDRQ1 (480ns)
Technology: ADUM series use Magnetic Coupling; ISO7220AQDRQ1 uses Capacitive Coupling
Supply Voltage: ADUM series support 2.7V minimum vs. IL 711T-3 at 3V minimum
Temperature Range: ADUM series (-40°C ~ 105°C) vs. IL 711T-3 (-40°C ~ 125°C)
Channel Configuration: ADUM3211BRZ has 1/1 bidirectional channels vs. IL 711T-3 with 2/0 unidirectional

These parts are suitable when application requirements permit reduced data rate, lower CMTI performance, or extended propagation delay.

Parameter Comparison

Part Number	Manufacturer	Channels	Isolation (Vrms)	Data Rate (Mbps)	CMTI (kV/µs)	tpLH/tpHL (ns)	PWD (ns)	Supply (V)	Temp (°C)	Technology	RoHS Status
IL 711T-3	NVE Corp	2	2500	110	100	15/15	3	3.0-5.5	-40 to 125	GMR	Non-compliant
IL 710T-3	NVE Corp	1	2500	110	100	15/15	3	3.0-5.5	-40 to 125	GMR	Non-compliant
IL 710T-3E	NVE Corp	1	2500	110	100	15/15	3	3.0-5.5	-40 to 125	GMR	ROHS3 Compliant
ADUM1200ARZ	Analog Devices	2	2500	1	25	150/150	40	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM1200ARZ-RL7	Analog Devices	2	2500	1	25	150/150	40	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM1200BRZ	Analog Devices	2	2500	10	25	50/50	3	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM1200BRZ-RL7	Analog Devices	2	2500	10	25	50/50	3	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM1200CRZ	Analog Devices	2	2500	25	25	45/45	3	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM1200CRZ-RL7	Analog Devices	2	2500	25	25	45/45	3	2.7-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ADUM3211BRZ	Analog Devices	2	2500	10	25	50/50	3	3.0-5.5	-40 to 105	Magnetic Coupling	ROHS3 Compliant
ISO7220AQDRQ1	Texas Instruments	2	2500	1	25	480/480	14	3.0-5.5	-40 to 125	Capacitive Coupling	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Parametric Equivalence (Single Channel Requirement): IL 710T-3E is the preferred choice when single-channel isolation is acceptable. It maintains all electrical specifications of the IL 711T-3 (110Mbps data rate, 100kV/µs CMTI, 15ns propagation delay) while offering RoHS3 compliance and EAR99 classification. IL 710T-3 provides identical performance but carries RoHS non-compliant status.

For Extended Temperature Range with Reduced Performance: ISO7220AQDRQ1 (Texas Instruments) maintains the full -40°C to 125°C operating range and 2500Vrms isolation with 2 channels. However, it operates at 1Mbps data rate and 480ns propagation delay. This part includes AEC-Q100 automotive qualification and RoHS3 compliance. Selection is appropriate for low-speed applications requiring automotive-grade reliability.

For RoHS3 Compliance with Reduced CMTI: ADUM1200 series (Analog Devices) in all variants provide RoHS3 compliance and 2500Vrms isolation with 2 channels. ADUM1200BRZ and ADUM1200BRZ-RL7 offer 10Mbps data rate with 50ns propagation delay and 3ns pulse width distortion, matching the IL 711T-3 PWD specification. ADUM1200CRZ and ADUM1200CRZ-RL7 provide 25Mbps data rate. All ADUM1200 variants operate at 25kV/µs CMTI (reduced from IL 711T-3 at 100kV/µs) and -40°C to 105°C temperature range. ADUM3211BRZ provides bidirectional channel configuration (1/1) instead of unidirectional (2/0).

For Packaging Variants: ADUM1200ARZ-RL7, ADUM1200BRZ-RL7, and ADUM1200CRZ-RL7 are supplied in Cut Tape (CT) & Digi-Reel® packaging, offering higher inventory availability compared to tube packaging. Electrical specifications remain identical to their tube-packaged counterparts.

Frequently Asked Questions (FAQ)

Q: Can IL 710T-3E replace IL 711T-3 in a 2-channel application? A: No. IL 710T-3E provides only 1 isolated channel. It is suitable only when the application requires single-channel isolation. For 2-channel requirements, IL 710T-3E cannot be used as a direct substitute.

Q: What is the primary difference between IL 711T-3 and ADUM1200BRZ? A: Both provide 2500Vrms isolation, 2 channels, and 8-SOIC packaging. The IL 711T-3 operates at 110Mbps with 100kV/µs CMTI and 15ns propagation delay using GMR technology. ADUM1200BRZ operates at 10Mbps with 25kV/µs CMTI and 50ns propagation delay using magnetic coupling technology. ADUM1200BRZ is RoHS3 compliant; IL 711T-3 is not.

Q: Is ISO7220AQDRQ1 suitable for high-speed applications? A: No. ISO7220AQDRQ1 operates at 1Mbps data rate with 480ns propagation delay, making it unsuitable for applications requiring the 110Mbps performance of IL 711T-3. It is appropriate for low-speed, automotive-grade isolation applications.

Q: What does the "-RL7" suffix indicate in ADUM part numbers? A: The "-RL7" suffix indicates Cut Tape (CT) & Digi-Reel® packaging. Electrically, ADUM1200BRZ and ADUM1200BRZ-RL7 are identical; the suffix only specifies the packaging and reel format for automated assembly.

Q: Can ADUM1200ARZ operate at lower supply voltages than IL 711T-3? A: Yes. ADUM1200ARZ supports 2.7V minimum supply voltage, whereas IL 711T-3 requires 3.0V minimum. However, ADUM1200ARZ operates at only 1Mbps data rate compared to IL 711T-3 at 110Mbps.

Q: Why does IL 710T-3E have different RoHS status than IL 711T-3? A: IL 710T-3E is manufactured to RoHS3 compliance standards, whereas IL 711T-3 is RoHS non-compliant. Both are electrically equivalent in their respective channel configurations. IL 710T-3E is the updated version suitable for applications with RoHS compliance requirements.

Q: What is the significance of CMTI (Common Mode Transient Immunity) in isolator selection? A: CMTI specifies the maximum rate of change of common-mode voltage that the isolator can withstand without introducing errors. IL 711T-3 at 100kV/µs tolerates faster voltage transitions than ADUM series at 25kV/µs. Applications with high dV/dt switching events require higher CMTI ratings.

Q: Are all substitute parts pin-compatible with IL 711T-3? A: All listed substitutes use the 8-SOIC (0.154", 3.90mm) package. However, pin configuration and functionality differ based on channel count and channel direction. IL 710T-3 and IL 710T-3E have different pinouts due to single-channel configuration. ADUM3211BRZ has bidirectional channels. Verify pinout compatibility in device datasheets before PCB layout.

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