IL 711S-3E Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 711S-3E is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides 2500Vrms isolation across 2 channels using Giant Magnetoresistive (GMR) technology, with a data rate of 150Mbps and common mode transient immunity of 100kV/µs. The device is housed in an 8-SOIC surface mount package and operates across a supply voltage range of 3V to 5.5V with an operating temperature range of -40°C to 100°C.

The IL 711S-3E maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). With 761 pieces in current inventory, this component is suitable for applications requiring high-speed digital isolation with superior common mode transient immunity performance.

Equivalent and substitute parts are identified based on matching or exceeding critical isolation parameters while maintaining compatible package form factors and electrical specifications.

Key Parameters

Parameter	IL 711S-3E Value	Substitution Criteria
Manufacturer	NVE Corp/Isolation Products	Any manufacturer acceptable
Series	IsoLoop®	Not required for substitution
Technology	GMR (Giant Magnetoresistive)	Alternative isolation technologies acceptable
Number of Channels	2	Must be 2 channels minimum
Voltage - Isolation	2500Vrms	Must be 2500Vrms or greater
Common Mode Transient Immunity (Min)	100kV/µs	Must be 100kV/µs or greater
Data Rate	150Mbps	Must be 150Mbps or greater
Package / Case	8-SOIC (0.154", 3.90mm Width)	Must be 8-SOIC package
Voltage - Supply	3V ~ 5.5V	Must support 3V to 5.5V range
Operating Temperature	-40°C ~ 100°C	Must support -40°C minimum
Mounting Type	Surface Mount	Must be Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant required

Substitute Part Grouping Explanation

Substitution logic for the IL 711S-3E is based on the following critical parameters:

Primary Matching Criteria:

Isolation voltage of 2500Vrms or greater
Minimum 2 channels with unidirectional configuration
8-SOIC package form factor
Surface mount technology
Supply voltage range supporting 3V to 5.5V operation
ROHS3 compliance

Secondary Performance Criteria:

Common mode transient immunity (CMTI) of 100kV/µs or greater
Data rate of 150Mbps or greater
Propagation delay specifications
Operating temperature range supporting -40°C minimum

Technology Flexibility: Substitute parts may employ different isolation technologies (Magnetic Coupling, Capacitive Coupling) provided all primary and secondary criteria are met. The IL 711S-3E uses GMR technology; however, alternative technologies are acceptable if electrical performance specifications are equivalent or superior.

Channel Configuration: The IL 711S-3E features 2 input channels on Side 1 with 0 channels on Side 2 (unidirectional configuration). Substitute parts must maintain this unidirectional channel topology with minimum 2 channels total.

Parameter Comparison

Part Number	Manufacturer	Channels	Isolation (Vrms)	CMTI (kV/µs)	Data Rate (Mbps)	tpLH/tpHL (ns)	Supply (V)	Temp Range (°C)	Package	Status
IL 711S-3E	NVE Corp	2	2500	100	150	15/15	3.0-5.5	-40 to 100	8-SOIC	Active
IL 710S-3E	NVE Corp	1	2500	100	150	15/15	3.0-5.5	-40 to 100	8-SOIC	Active
ADUM1200ARZ	Analog Devices	2	2500	25	1	150/150	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM1200ARZ-RL7	Analog Devices	2	2500	25	1	150/150	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM1200BRZ	Analog Devices	2	2500	25	10	50/50	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM1200BRZ-RL7	Analog Devices	2	2500	25	10	50/50	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM1200CRZ	Analog Devices	2	2500	25	25	45/45	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM1200CRZ-RL7	Analog Devices	2	2500	25	25	45/45	2.7-5.5	-40 to 105	8-SOIC	Active
ADUM3211BRZ	Analog Devices	2	2500	25	10	50/50	3.0-5.5	-40 to 105	8-SOIC	Active
ISO7220AQDRQ1	Texas Instruments	2	2500	25	1	480/480	3.0-5.5	-40 to 125	8-SOIC	Active
ISO7220CD	Texas Instruments	2	2500	25	25	42/42	2.8-5.5	-40 to 125	8-SOIC	Last Time Buy

Engineering Selection Recommendations

Direct Parametric Equivalent: The IL 710S-3E serves as a parametric equivalent with identical electrical specifications to the IL 711S-3E. The primary difference is channel count (1 channel versus 2 channels). Selection of IL 710S-3E is appropriate only when single-channel isolation is required.

Analog Devices iCoupler® Series (ADUM1200 variants): The ADUM1200 series provides 2500Vrms isolation in 2-channel configurations with 8-SOIC packaging. These parts employ Magnetic Coupling technology instead of GMR. Key performance trade-offs include:

Reduced common mode transient immunity (25kV/µs versus 100kV/µs)
Reduced data rate options (1Mbps, 10Mbps, 25Mbps versus 150Mbps)
Extended propagation delay (45-150ns versus 15ns)

ADUM1200 variants are suitable for applications where lower CMTI and data rate requirements exist. The -RL7 suffix indicates Cut Tape and Digi-Reel® packaging; standard tube packaging variants are also available.

ADUM3211BRZ: This part provides bidirectional channel configuration (1 input/1 output per side) versus the unidirectional configuration of IL 711S-3E. Electrical isolation and package specifications match ADUM1200 series performance levels.

Texas Instruments ISO7220 Series: ISO7220 parts employ Capacitive Coupling technology with 2500Vrms isolation and 2-channel configuration. Performance characteristics include:

Reduced common mode transient immunity (25kV/µs)
Reduced data rate (1Mbps or 25Mbps)
Extended propagation delay (42-480ns)
Extended operating temperature range (-40°C to 125°C)

ISO7220AQDRQ1 carries automotive qualification (AEC-Q100) with Grade designation. ISO7220CD is designated Last Time Buy status, indicating discontinued product line.

Product Status Considerations: All recommended substitutes maintain Active product status except ISO7220CD (Last Time Buy). For new designs, Active status parts are preferred. The IL 711S-3E remains the optimal choice for applications requiring 150Mbps data rate and 100kV/µs CMTI performance.

Compliance and Certification: All recommended parts maintain ROHS3 compliance. ISO7220AQDRQ1 includes automotive-grade qualification (AEC-Q100) for applications requiring automotive reliability standards.

Frequently Asked Questions (FAQ)

Q: Can ADUM1200 series parts directly replace IL 711S-3E in existing designs?

A: ADUM1200 series parts are not direct replacements. While both provide 2500Vrms isolation in 2-channel 8-SOIC packages, the IL 711S-3E delivers 150Mbps data rate and 100kV/µs CMTI, whereas ADUM1200 variants provide maximum 25Mbps data rate and 25kV/µs CMTI. Substitution is only valid if application requirements do not exceed ADUM1200 performance specifications.

Q: What is the difference between ADUM1200ARZ and ADUM1200ARZ-RL7?

A: Both parts are electrically identical. The difference is packaging format: ADUM1200ARZ is supplied in Tube packaging, while ADUM1200ARZ-RL7 is supplied in Cut Tape (CT) and Digi-Reel® format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why does IL 710S-3E appear in the substitute list if it has only 1 channel?

A: IL 710S-3E is listed as a parametric equivalent because it shares identical electrical specifications with IL 711S-3E (same isolation voltage, CMTI, data rate, and package). However, it provides only 1 channel instead of 2. This part is suitable only for applications requiring single-channel isolation.

Q: Is ISO7220CD recommended for new designs?

A: No. ISO7220CD carries Last Time Buy status, indicating the product line is discontinued. For new designs, select from Active status parts: ISO7220AQDRQ1 (automotive-qualified) or other Active alternatives.

Q: What are the key performance trade-offs when substituting IL 711S-3E with ISO7220CD?

A: ISO7220CD provides equivalent 2500Vrms isolation and 2-channel configuration in 8-SOIC package. However, CMTI is reduced from 100kV/µs to 25kV/µs, data rate is reduced from 150Mbps to 25Mbps, and propagation delay increases from 15ns to 42ns. Operating temperature range extends to 125°C. Substitution is valid only if application tolerates these performance reductions.

Q: Can parts with different supply voltage ranges be substituted?

A: Supply voltage range compatibility must be verified. IL 711S-3E operates at 3V to 5.5V. ADUM1200 series supports 2.7V to 5.5V (broader low-end range). ISO7220CD supports 2.8V to 5.5V. Substitution is valid if the substitute part's supply range encompasses the application's operating voltage requirements.

Q: What is the significance of CMTI (Common Mode Transient Immunity) in substitution decisions?

A: CMTI specifies the maximum rate of change of common-mode voltage that the isolator can withstand without introducing errors. IL 711S-3E provides 100kV/µs CMTI, superior to most alternatives (25kV/µs). Applications with high-speed switching or noisy environments require higher CMTI. Substitution with lower CMTI parts is only valid if application noise environment is benign.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in the substitute comparison table maintain ROHS3 compliance. This compliance status is consistent across NVE Corp, Analog Devices, and Texas Instruments offerings.

Q: What is the difference between unidirectional and bidirectional channel configuration?

A: IL 711S-3E features unidirectional channels (2 inputs on Side 1, 0 channels on Side 2). ADUM3211BRZ features bidirectional configuration (1 input and 1 output on each side). Unidirectional parts are suitable for one-way signal transmission; bidirectional parts support simultaneous two-way communication. Application requirements determine which configuration is appropriate.

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