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Texas Instruments ISO7841FDWW
- Part No.:
- ISO7841FDWW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.551", 14.00mm Width)
- Datasheet:
-
ISO7841FDWW.pdf
- Description:
- DGTL ISO 5700VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:782
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Product details
Overview
ISO7841FDWW from Texas Instruments is a reinforced quad-channel digital isolator with 8000VPK isolation voltage, three forward and one reverse signal channels, ±100 kV/μs CMTI, 100 Mbps signaling rate, and operation across –55°C to 125°C - used in motor control gate drivers and isolated power supply feedback loops.
For engineers reviewing the ISO7841FDWW datasheet, ISO7841FDWW pinout, ISO7841FDWW application, or ISO7841FDWW equivalent, this page delivers verified specifications, package-validated pin functions, safety-certified insulation parameters, and real-world implementation context for industrial and medical isolation design.
Technical Context
The ISO7841FDWW implements capacitive SiO2 isolation with dual-side independent supplies (VCCI/GNDI and VCCO/GNDO), enabling level translation between 2.25V–5.5V domains. Its enable pins (EN1, EN2) support high-impedance output states for multi-controller bus sharing and dynamic power reduction.
Unlike the ISO7841DWW variant, the 'F' suffix denotes fail-safe default behavior: outputs go low upon input-side power loss. This deterministic state supports safe shutdown in motor drives and HV inverters where uncontrolled high-side activation must be avoided.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 8000VPK reinforced per DIN EN IEC 60747-17 - enables direct interface with 690VAC industrial buses and 1000VDC solar DC links without external creepage reinforcement. |
| Signaling Rate | 100 Mbps - supports high-speed PWM feedback in servo drives and real-time current sensing in SiC/GaN inverter gate drivers. |
| Propagation Delay | 11 ns typical at 5V - ensures sub-20 ns channel-to-channel skew for synchronized multi-phase switching control. |
| CMTI | ±100 kV/μs minimum - rejects fast transients from IGBT/SiC switching noise in motor control and UPS systems. |
| Supply Range | 2.25V to 5.5V per side - allows direct interfacing with 3.3V microcontrollers and 5V isolated DC-DC outputs without level shifters. |
| Default Output State | Low on input power loss - provides fail-safe deactivation of gate drivers in fault conditions, critical for functional safety compliance. |
| Package | SOIC-16 extra-wide body (DWW): 10.3 mm × 17.25 mm - achieves >14.5 mm creepage/clearance for reinforced isolation at 1000VRMS working voltage. |
Pinout & Package
ISO7841FDWW uses the extra-wide SOIC-16 (DWW) package with 10.3 mm × 17.25 mm footprint and >14.5 mm creepage/clearance - certified for reinforced isolation up to 2000VRMS working voltage per IEC 62368-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INx (3,4,5,11) | Input logic signal (A–D) | Accepts CMOS/LVCMOS levels referenced to VCCI/GNDI; supports 2.25V–5.5V input domain. |
| OUTx (6,12,13,14) | Isolated output signal (D–A) | Drives CMOS/LVCMOS loads referenced to VCCO/GNDO; direction: OUTA–OUTC forward, OUTD reverse. |
| EN1 (7), EN2 (10) | Output enable control | Active-high enables respective side outputs; low forces high-impedance - enables bus arbitration and power gating. |
| VCCI (1), GNDI (2) | Input-side power | Supplies input buffers and logic; independent of output side - enables galvanic separation of control and power domains. |
| VCCO (16), GNDO (9) | Output-side power | Supplies output buffers; decoupled from VCCI - permits level translation and eliminates ground loop coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Certification | 8000VPK per VDE 0884-17 + 5700VRMS per UL 1577 - meets IEC 61800-5-1 for drive safety and IEC 62368-1 for end-equipment surge immunity. |
| Fail-Safe Default Output | Outputs go low on VCCI loss - prevents unintended gate turn-on in motor driver half-bridges during controller reset or brownout. |
| High CMTI Immunity | ≥100 kV/μs common-mode transient rejection - maintains signal integrity in noisy 100 kHz+ SiC inverter environments. |
| Low-Power Operation | 1.7 mA/channel at 1 Mbps (5V) - reduces thermal load in densely packed industrial PCBs and extends battery life in portable medical devices. |
| Wide-Temperature Operation | –55°C to 125°C ambient - qualified for under-hood automotive traction inverters and outdoor solar string monitoring units. |
Applications
| Motor Control Gate Driver | Solar Inverter Feedback |
|---|---|
Use Scenario: Isolating PWM signals from MCU to high-voltage IGBT/SiC gate drivers in 3-phase inverters. IC Role / Device Role / Timing Role: Quad-channel isolator delivering three forward PWMs (CH A–C) and one reverse fault feedback (CH D) with <20 ns channel skew. Use Value: Enables precise timing-critical dead-time control while blocking 1000VDC bus transients via 8000VPK reinforced barrier. |
Use Scenario: Transmitting isolated current/voltage sensor data from DC-link to system controller in string-level solar inverters. IC Role / Device Role / Timing Role: High-CMTI digital isolator conveying ADC SPI or isolated analog-to-digital converter outputs across 1500VDC PV strings. Use Value: Maintains measurement accuracy despite fast dv/dt noise from MPPT switching, supported by ±100 kV/μs immunity. |
| Industrial PLC I/O Module | Medical Patient Monitoring |
Use Scenario: Isolating digital inputs/outputs in programmable logic controller backplanes handling 24VDC field signals. IC Role / Device Role / Timing Role: Reinforced isolator providing 4-channel signal separation between field-side and CPU-side with independent VCCI/VCCO rails. Use Value: Prevents ground-loop interference and protects CPU from surges up to 12.8 kV per IEC 61000-4-5, certified to CSA/IEC 60950-1. |
Use Scenario: Isolating ECG/EEG analog front-end data paths from patient-connected circuits to main processing unit. IC Role / Device Role / Timing Role: Safety-certified isolator meeting 2 MOPP requirements per IEC 60601-1 for patient-connected equipment. Use Value: Provides reinforced insulation with 40-year barrier life and TUV certification to EN 62368-1, ensuring long-term reliability in life-critical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel reinforced digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7841DWW | Same pinout and specs, but default output goes high on input power loss - no fail-safe low assertion. | Preferred in non-safety-critical logic isolation where high default is acceptable (e.g., status reporting). | Select ISO7841DWW only if fail-safe low output is not required; ISO7841FDWW is mandatory for motor gate driver safety interlocks. |
| ADUM2401ARWZ | 2500VRMS reinforced rating (UL), 100 Mbps, but only 25 kV/μs CMTI and no VDE 0884-17 certification. | Suitable for lower-voltage industrial controls (<600VAC), not for 1000VDC solar or EV traction systems. | Use ADUM2401ARWZ where cost sensitivity outweighs 8000VPK requirement and CMTI margin is sufficient. |
Compared with ISO7841DWW and ADUM2401ARWZ, the ISO7841FDWW uniquely combines VDE-certified 8000VPK reinforced isolation, fail-safe low default, and ±100 kV/μs CMTI - making it the only option for functional safety-compliant motor drives and high-voltage renewable energy systems.
Availability
ISO7841FDWW is available at Aetrix Electronics and suitable for motor control gate drivers, solar inverter feedback loops, industrial PLC I/O modules, and medical patient monitoring systems requiring stable component supply and long-term lifecycle assurance.
Supply support for ISO7841FDWW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability isolation technologies with over 50 years of industrial and automotive qualification experience.
The ISO7841x family was designed specifically for high-voltage, high-noise industrial and medical applications demanding reinforced isolation, fail-safe behavior, and long-term reliability - targeting motor drives, solar inverters, and safety-critical instrumentation.
FAQ
What is the key safety distinction between ISO7841FDWW and ISO7841DWW?
The ISO7841FDWW features a fail-safe default output that goes low when input-side power (VCCI) is lost, whereas the ISO7841DWW defaults high. This low-default behavior is critical for preventing unintended gate activation in motor drive half-bridges and is required for IEC 61800-5-1 functional safety compliance. The ISO7841FDWW also carries identical VDE/UL certifications but enforces safer system-level fault response.
Does ISO7841FDWW support bidirectional communication across its four channels?
No - the ISO7841FDWW has fixed unidirectional channel mapping: three forward channels (INA→OUTA, INB→OUTB, INC→OUTC) and one reverse channel (IND←OUTD). It does not support true bidirectional data flow on any single channel. For bidirectional isolation, separate forward/reverse pairs or dedicated bidirectional isolators like ISO674x are required. The ISO7841FDWW is optimized for asymmetric control-to-power and feedback signal routing.
What is the minimum creepage and clearance achieved by the ISO7841FDWW DWW package?
The ISO7841FDWW in the extra-wide SOIC-16 (DWW) package guarantees >14.5 mm external creepage and clearance per DIN EN IEC 60747-17, enabling reinforced isolation up to 2000VRMS working voltage. This exceeds the 8 mm minimum required for 1000VRMS systems per IEC 62368-1 and supports pollution degree 2 environments without additional board-level spacing.
Can ISO7841FDWW operate with different supply voltages on input and output sides?
Yes - the ISO7841FDWW supports independent 2.25V–5.5V supplies on VCCI/GNDI (input side) and VCCO/GNDO (output side), enabling seamless level translation. For example, it can accept 3.3V logic from an MCU on the input side while driving 5V gate drivers on the output side, eliminating external level shifters and reducing BOM count in mixed-voltage systems.
How does the enable pin functionality impact power consumption in ISO7841FDWW?
Asserting EN1 or EN2 low places the corresponding side's outputs into high-impedance state, reducing supply current by up to 70% per side in disabled mode (e.g., ICC1 drops from 5 mA to 1.1 mA at 100 Mbps). This feature enables dynamic power gating in multi-controller systems and lowers idle power in battery-powered medical monitors using the ISO7841FDWW for isolated sensor interfaces.
ISO7841FDWW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.551", 14.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5700Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 16ns, 16ns
- Pulse Width Distortion (Max):
- 4.1ns
- Rise / Fall Time (Typ):
- 1.7ns, 1.9ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7841FDWW FAQ
1.How can I place an order for ISO7841FDWW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7841FDWW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISO7841FDWW reliable?
The price and inventory of ISO7841FDWW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7841FDWW is usually 5 days.
3.What payment methods are accepted for ISO7841FDWW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7841FDWW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7841FDWW?
ISO7841FDWW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7841FDWW order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISO7841FDWW?
For technical support, including ISO7841FDWW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7841FDWW requirements.
6.How does Aetrix verify that ISO7841FDWW is sourced from the original manufacturer or authorized distributors?
All ISO7841FDWW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISO7841FDWW meets industry standards.
7.What is the process for return or replacement of ISO7841FDWW?
All ISO7841FDWW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7841FDWW, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISO7841FDWW part is unused and in its original packaging.
Return procedure for ISO7841FDWW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7841FDWW Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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