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Texas Instruments ISOW7841FDWE
- Part No.:
- ISOW7841FDWE
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISOW7841FDWE.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
ISOW7841FDWE from Texas Instruments is a reinforced quad-channel digital isolator with integrated 5-V/3.3-V DC-DC converter, delivering up to 130 mA load current at 5 V output, 100 Mbps data rate, and 5000 VRMS isolation rating. It serves as a single-chip isolated power + signal solution in industrial motor control interfaces where space-constrained PCBs require elimination of external isolated DC-DC.
For engineers reviewing the ISOW7841FDWE datasheet, ISOW7841FDWE pinout, ISOW7841FDWE application, or ISOW7841FDWE equivalent, key selection criteria include its 16-pin SOIC-WB package, bidirectional channel configuration (3 forward + 1 reverse), ±100 kV/µs CMTI, and SEL-pin-selectable 5-V/3.3-V isolated output voltage.
Technical Context
The ISOW7841FDWE implements dual-isolation architecture: capacitive SiO₂ barriers for signal channels (INA–IND inputs → OUTA–OUTD outputs) and on-chip polymer-insulated transformers for power conversion. Its channel mapping-3 input-to-output (forward) and 1 output-to-input (reverse)-enables bidirectional communication across the barrier without external level-shifting.
Signal integrity is maintained via low propagation delay (13 ns typ at 5 V), high common-mode transient immunity (±100 kV/µs), and robust EMC performance including ±8 kV IEC 61000-4-2 contact discharge protection across the isolation barrier. The integrated DC-DC converter supports soft-start, overload/short-circuit protection, and thermal shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 100 Mbps - supports high-speed serial interfaces like isolated SPI or RS-485 control links |
| Isolation rating | 5000 VRMS - meets UL 1577 and reinforced insulation requirements for industrial safety |
| CMTI | ±100 kV/µs - prevents false triggering in noisy motor drive or grid-tied inverter environments |
| Output power | 0.65 W - sufficient to power isolated ADCs, gate drivers, or microcontrollers without auxiliary supply |
| Load current | ≥130 mA @ 5 V output - enables direct powering of 5-V logic or analog circuitry on isolated side |
| Propagation delay | 13 ns (typ, 5-V supply) - preserves timing margins in real-time control loops |
| Operating temp | –40°C to +125°C - qualified for under-hood automotive, factory-floor, and outdoor infrastructure use |
Pinout & Package
ISOW7841FDWE is housed in a 16-pin wide-body SOIC (SOIC-WB, DWE) package measuring 10.30 mm × 7.50 mm, optimized for creepage/clearance compliance in high-voltage systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary-side supply input | 3–5.5 V input referenced to GND1; powers internal logic and DC-DC primary |
| GND1 | Primary-side ground | Reference for VCC and input-side signals (INA–IND) |
| INA, INB, INC | Input channels (forward) | Logic inputs referenced to VSI (VCC or VISO); mapped to OUTA, OUTB, OUTC respectively |
| IND | Input channel (reverse) | Input referenced to VISO; mapped to OUTD - enables feedback from isolated side |
| OUTA–OUTD | Output channels | LVCMOS outputs referenced to VSO (VCC or VISO); OUTD driven by IND, others by corresponding inputs |
| SEL | VISO selection control | Configures isolated output: shorted to VISO → 5 V; shorted to GND2 or floating → 3.3 V |
| VISO | Isolated supply output | Regulated 5-V or 3.3-V output (per SEL) referenced to GND2; powers isolated-side circuitry |
| GND2 | Isolated-side ground | Reference for VISO and output-side signals (OUTA–OUTD, IND) |
| NC | No-connect terminal | Internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC converter | Eliminates need for external isolated power supply, reducing BOM count and board area in space-limited designs |
| Reinforced isolation barrier | 5000 VRMS rating and >100-year lifetime at 1 kVRMS working voltage ensure long-term reliability in safety-critical systems |
| Bidirectional channel configuration | 3 forward (input→output) + 1 reverse (output→input) channels enable full-duplex isolated communication without extra components |
| SEL-pin voltage selection | Single-pin configuration of VISO output (5 V or 3.3 V) simplifies design reuse across multiple voltage-domain systems |
| System-level EMC immunity | ±8 kV IEC 61000-4-2 contact discharge protection and low emissions meet industrial EMI standards without added filtering |
Applications
| Industrial Motor Drives | Grid-Tied Inverters |
|---|---|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback between MCU and IGBT/SiC half-bridge in variable-frequency drives. IC Role / Device Role / Timing Role: ISOW7841FDWE provides reinforced isolation for control signals while powering isolated current-sense amplifiers and gate drivers via its 5-V VISO output. Use Value: Enables compact, single-chip isolation + power solution that meets IEC 61800-5-1 reinforced insulation requirements and withstands ≥10 kVPK surge events. | Use Scenario: Isolating communication between grid-synchronization controller and isolated ADCs measuring AC line voltage/current in solar/wind inverters. IC Role / Device Role / Timing Role: ISOW7841FDWE delivers isolated 3.3-V power to precision ADCs and transmits synchronized sampling triggers across the barrier at 100 Mbps. Use Value: Achieves <13 ns propagation delay and ±100 kV/µs CMTI to maintain timing accuracy and prevent corruption during fast grid transients. |
| Medical Patient Monitoring | Automated Test Equipment |
Use Scenario: Providing patient-isolated analog front-end power and digital interface for ECG/EEG sensor modules in Class II medical devices. IC Role / Device Role / Timing Role: ISOW7841FDWE supplies regulated 3.3-V VISO (SEL = GND2) to low-noise op-amps and transmits digitized sensor data to host MCU with 2 MOPP safety certification. Use Value: Meets IEC 60601-1 250 VRMS working voltage and CSA 2 MOPP requirements while eliminating transformer-based isolated supplies. | Use Scenario: Isolating digital control lines and powering isolated DACs/ADCs in modular PXI or LXI instrumentation chassis. IC Role / Device Role / Timing Role: ISOW7841FDWE routes high-speed trigger and calibration commands across isolation barrier while powering isolated reference buffers via 5-V VISO. Use Value: Supports 100 Mbps data rate and low jitter to preserve measurement fidelity in sub-nanosecond timing applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6421AARIZ-RL | 4 forward channels only; no reverse channel; 500 mW max output; 50 Mbps data rate | Suitable for unidirectional control-only isolation; lacks IND→OUTD reverse path needed for feedback | Select when only forward isolation is required and lower data rate suffices |
| SI88642ED-IS | 4 forward channels; 3.75 kVRMS isolation; 100 Mbps; no integrated DC-DC - requires external isolated supply | Requires additional isolated DC-DC IC and magnetics; increases layout complexity and footprint | Select when higher channel count density is prioritized over integrated power |
Compared with ADUM6421AARIZ-RL and SI88642ED-IS, the ISOW7841FDWE uniquely combines bidirectional channel capability, integrated 0.65-W DC-DC, and 5000 VRMS reinforced isolation in a single SOIC-WB package-reducing component count, enabling feedback-driven architectures, and simplifying safety certification.
Availability
ISOW7841FDWE is available at Aetrix Electronics and suitable for industrial motor control, grid infrastructure, medical equipment, test and measurement, and automotive subsystems requiring stable component supply and long-term lifecycle support.
Supply support for ISOW7841FDWE 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 power management solutions for industrial, automotive, and medical markets.
The ISOW784x family was designed to replace discrete isolation + isolated DC-DC combinations in space-constrained, safety-certified systems-delivering integrated signal and power isolation with reinforced safety ratings.
FAQ
What is the maximum load current supported by ISOW7841FDWE at 3.3-V isolated output?
The ISOW7841FDWE supports ≥75 mA load current when configured for 3.3-V VISO output (SEL tied to GND2 or left floating). This is verified per Section 7.15 of the datasheet under 3.3-V input, 3.3-V output conditions. The ISOW7841FDWE maintains regulation and thermal stability within this limit across its full –40°C to +125°C operating range.
Does ISOW7841FDWE support bidirectional data flow across the isolation barrier?
Yes, the ISOW7841FDWE supports bidirectional communication: three forward channels (INA→OUTA, INB→OUTB, INC→OUTC) and one reverse channel (IND→OUTD). This allows feedback signals from the isolated side to be transmitted back to the primary side without external components. The ISOW7841FDWE pinout confirms IND on pin 11 and OUTD on pin 6, matching Figure 6-2 in the datasheet.
What safety certifications does ISOW7841FDWE hold for medical applications?
The ISOW7841FDWE holds CSA certification per IEC 60601-1 with 2 MOPP (Means of Patient Protection), supporting its use in patient-connected medical equipment. It is rated for 250 VRMS maximum working voltage under IEC 60601-1 Ed. 3+A1 and carries TUV EN 61010-1 certification. These approvals are documented in Section 7.7 of the ISOW7841FDWE datasheet.
How does the SEL pin configure the isolated output voltage of ISOW7841FDWE?
The SEL pin on ISOW7841FDWE selects VISO output voltage: shorting SEL to VISO sets 5-V output; shorting SEL to GND2 or leaving it floating sets 3.3-V output. This configuration is active at power-up and remains latched. The ISOW7841FDWE datasheet specifies this behavior in Section 6 (Pin Functions) and Section 9.4 (Device Functional Modes).
What is the CMTI rating of ISOW7841FDWE and why is it critical in motor control?
The ISOW7841FDWE has a minimum common-mode transient immunity (CMTI) of ±100 kV/µs. In motor control applications, fast-switching IGBTs/SiC FETs generate high dv/dt noise that can corrupt isolated signals. This high CMTI ensures reliable operation of the ISOW7841FDWE in noisy environments such as VFDs and servo drives, preventing false triggering of gate drivers or misreading of current-sense data.
ISOW7841FDWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 17.6ns, 17.6ns
- Pulse Width Distortion (Max):
- 4.7ns
- Rise / Fall Time (Typ):
- 4ns, 4ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISOW7841FDWE FAQ
1.How can I place an order for ISOW7841FDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for ISOW7841FDWE 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 ISOW7841FDWE reliable?
The price and inventory of ISOW7841FDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISOW7841FDWE is usually 5 days.
3.What payment methods are accepted for ISOW7841FDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISOW7841FDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISOW7841FDWE?
ISOW7841FDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISOW7841FDWE 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 ISOW7841FDWE?
For technical support, including ISOW7841FDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISOW7841FDWE requirements.
6.How does Aetrix verify that ISOW7841FDWE is sourced from the original manufacturer or authorized distributors?
All ISOW7841FDWE 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 ISOW7841FDWE meets industry standards.
7.What is the process for return or replacement of ISOW7841FDWE?
All ISOW7841FDWE units undergo pre-shipment inspection (PSI). If there is an issue with ISOW7841FDWE, 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 ISOW7841FDWE part is unused and in its original packaging.
Return procedure for ISOW7841FDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISOW7841FDWE Tags
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