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Texas Instruments ISO7041DBQR
- Part No.:
- ISO7041DBQR
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7041DBQR.pdf
- Description:
- DGTL ISO 3000VRMS 4CH GP 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
ISO7041DBQR from Texas Instruments is an ultra-low-power, four-channel digital isolator with galvanic isolation barrier, 3000 VRMS isolation rating, 4 Mbps maximum data rate, and default-high output logic. It features three forward-direction and one reverse-direction channels in a 16-pin QSOP package, enabling robust signal isolation in low-power industrial sensor interfaces and isolated communication buses.
For engineers reviewing the ISO7041DBQR datasheet, ISO7041DBQR pinout, ISO7041DBQR application, or ISO7041DBQR equivalent, this page delivers verified technical context, real-world power-performance tradeoffs at 1.8 V–5.5 V supply ranges, channel-specific refresh control, and safety-certified CMTI performance up to ±100 kV/μs - all critical for designing reliable isolated I/O in field transmitters and factory automation systems.
Technical Context
The ISO7041DBQR uses double capacitive SiO₂ insulation with edge-based architecture and ON-OFF keying modulation to achieve <3.5 μA per channel quiescent current at 3.3 V while maintaining 3000 VRMS UL 1577 isolation. Its asymmetric channel directionality (3 forward, 1 reverse) supports bidirectional system-level signaling without external logic inversion.
It operates across dual independent supply rails (1.71–1.89 V or 2.25–5.5 V per side), with full functionality over –55°C to +105°C (low-voltage mode) or –55°C to +125°C (wide-voltage mode), and integrates EN1/EN2 pins to globally enable/disable internal refresh circuitry - a key differentiator from fixed-refresh isolators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 4 Mbps - enables high-speed SPI and UART isolation without timing bottlenecks. |
| Isolation Rating | 3000 VRMS - certified for reinforced insulation in industrial equipment per UL 1577 and DIN VDE V 0884-11. |
| Quiescent Current | 3.5 μA per channel at 3.3 V - allows battery-powered or energy-harvested sensor nodes to operate for years. |
| CMTI | ±100 kV/μs typical - prevents false triggering during fast transients in motor drives and PLC backplanes. |
| Supply Range | 1.71–1.89 V and 2.25–5.5 V per side - supports mixed-voltage systems (e.g., 1.8 V MCU + 3.3 V ADC) without level shifters. |
| Operating Temperature | –55°C to +125°C (at ≥2.25 V) - suitable for under-hood automotive sensors and outdoor process instrumentation. |
| Channel Direction | 3 forward, 1 reverse - eliminates need for external inverters in half-duplex isolated interfaces like RS-485 transceivers. |
Pinout & Package
ISO7041DBQR is housed in a 16-pin QSOP (DBQ) package measuring 4.90 mm × 3.90 mm, with creepage and clearance >3.7 mm, DTI = 17 µm, and material group I per IEC 60664-1 - meeting reinforced insulation requirements for functional safety designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC2 | Independent power supplies | Side 1 and Side 2 rails can be set independently (1.71–5.5 V); enables voltage translation between domains. |
| GND1, GND2 | Isolated ground references | Separate ground return paths prevent ground-loop noise coupling across isolation barrier. |
| INA–IND | Input terminals (4 channels) | CMOS/LVCMOS-compatible inputs; support 1.71–5.5 V logic thresholds with hysteresis. |
| OUTA–OUTD | Output terminals (4 channels) | Default-high outputs (ISO7041); drive ±1 mA at 1.8 V, ±4 mA at 5 V - sufficient for direct GPIO/SPI interface. |
| EN1, EN2 | Refresh enable controls | Must be tied to same logic state (both GND or both VCC) to enable/disable internal refresh - critical for ultra-low-power sleep modes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dynamic power | 115.7–138.7 μA per channel at 1 Mbps / 3.3 V - reduces thermal load in dense PCB layouts. |
| Robust CMTI | ±100 kV/μs typical - exceeds IEC 61000-4-4 Level 4 immunity for industrial environments. |
| Wide temperature range | –55°C to +125°C at ≥2.25 V supply - validated for extended operation in harsh ambient conditions. |
| Intrinsic safety certification | ATEX II 1G Ex ia IIC Ga and IECEx CSA 19.0040U - enables use in hazardous area field devices without additional barriers. |
| Low barrier capacitance | ~1.5 pF - minimizes high-frequency signal coupling and preserves signal integrity in high-speed links. |
Applications
| 4–20 mA Loop-Powered Transmitters | Factory Automation I/O Modules |
|---|---|
Use Scenario: Isolating analog sensor signals and digital control lines in loop-powered pressure/temperature transmitters. IC Role / Device Role / Timing Role: Digital isolator providing galvanic separation between 4–20 mA loop side and microcontroller side, with default-high fail-safe output. Use Value: Enables safe, low-power operation with <3.5 μA quiescent current per channel - extending battery life or reducing loop burden. |
Use Scenario: Protecting PLC controller GPIOs and serial interfaces from EMI and ground potential differences in motor control cabinets. IC Role / Device Role / Timing Role: Four-channel isolator handling SPI clock/data and status feedback with 4 Mbps throughput and ±100 kV/μs CMTI. Use Value: Eliminates need for discrete optocouplers or multiple single-channel isolators - saving board space and BOM cost. |
| Low-Power Sensor Node Interfaces | Isolated UART for Industrial Gateways |
Use Scenario: Isolating I²C or SPI interfaces between ultra-low-power MCUs (1.8 V) and higher-voltage peripherals (3.3 V or 5 V). IC Role / Device Role / Timing Role: Voltage-translating digital isolator supporting asymmetric rail operation and 250 ns minimum pulse width. Use Value: Removes level-shifter ICs and reduces component count while maintaining timing margins at 4 Mbps. |
Use Scenario: Providing isolated UART communication between industrial gateway processors and legacy RS-232/RS-485 field devices. IC Role / Device Role / Timing Role: Dual-directional isolator (3 forward + 1 reverse) enabling full-duplex UART with single-chip integration. Use Value: Avoids external inverter logic and simplifies PCB routing - critical for compact gateway designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7042DBQR | Same 4-channel QSOP package but with 2 forward + 2 reverse channels; identical power specs and isolation rating. | Better suited for fully bidirectional protocols (e.g., I²C) requiring symmetric channel directionality. | Select ISO7042DBQR only when reverse-direction channel count must match forward count - ISO7041DBQR remains optimal for SPI/UART where 3:1 asymmetry is standard. |
| ADUM1401ARWZ | 4-channel, 3 forward + 1 reverse, but 1 Mbps max data rate and 2500 VRMS isolation; higher quiescent current (12 μA/ch @ 3.3 V). | Limited to lower-speed industrial interfaces; lacks ATEX/IECEx intrinsic safety certification. | Choose ADUM1401ARWZ only if legacy design reuse or lower-cost sourcing is prioritized over speed, safety certification, and ultra-low power. |
Compared with ISO7042DBQR and ADUM1401ARWZ, ISO7041DBQR uniquely combines 4 Mbps speed, 3000 VRMS isolation, intrinsic safety approval, and sub-4 μA quiescent current - making it the only option qualified for next-generation low-power, high-reliability industrial field devices requiring functional safety compliance.
Availability
ISO7041DBQR is available at Aetrix Electronics and suitable for 4–20 mA loop-powered transmitters, factory automation I/O modules, and low-power sensor node interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for ISO7041DBQR 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 components for industrial, automotive, and communications markets.
The ISO7041DBQR belongs to TI's ISO70xx ultra-low-power digital isolator family, engineered specifically for energy-constrained industrial sensing, process control, and intrinsic safety–certified field instrumentation where power, size, and safety certification are co-primary design constraints.
FAQ
What is the default output state of ISO7041DBQR during power loss?
The ISO7041DBQR has a default-high output configuration. When input power or signal is lost on either side of the isolation barrier, all four output channels (OUTA–OUTD) remain logic high. This fail-safe behavior ensures predictable system state in fault conditions - critical for controlling valves or relays in process automation. The ISO7041F variant provides default-low output, but ISO7041DBQR strictly implements default-high per TI's device functional modes documentation.
Does ISO7041DBQR support asymmetric supply voltages across its isolation barrier?
Yes, ISO7041DBQR supports independent supply rails: VCC1 (side 1) and VCC2 (side 2) can each be set to any value within 1.71–1.89 V or 2.25–5.5 V ranges. This enables direct interfacing between 1.8 V microcontrollers and 3.3 V ADCs or DACs without external level shifters. The device maintains full 4 Mbps data rate and specified CMTI performance across all valid supply combinations, as verified in TI's SLLSF54D datasheet Section 7.3.
How does the EN1/EN2 refresh enable function impact power consumption in ISO7041DBQR?
EN1 and EN2 pins control internal refresh circuitry that maintains DC signal integrity across the capacitive barrier. When both EN1 and EN2 are tied to GND, refresh is enabled - increasing quiescent current by ~1–2 μA per channel but ensuring indefinite DC-level retention. When both are tied to their respective VCC rails, refresh is disabled, minimizing current (e.g., 3.5 μA/ch @ 3.3 V) but limiting guaranteed DC hold time to ~10 seconds. This tradeoff is explicitly quantified in Table 7.10 and 7.12 of the ISO7041DBQR datasheet.
What safety certifications apply to ISO7041DBQR and what do they enable?
ISO7041DBQR holds UL 1577 (3000 VRMS), DIN VDE V 0884-11:2017-01, CQC, TUV, CSA, IECEx (IEC 60079-0 & -11), and ATEX (EN 60079-0 & -11) certifications. Its IECEx CSA 19.0040U and ATEX CSANe 20ATEX2003U certificates specifically authorize use in Zone 0/1 hazardous areas as intrinsic safety (IS) apparatus - enabling direct integration into explosion-proof field transmitters without external safety barriers, per TI's Intrinsic Safety section (Section 10.2).
Can ISO7041DBQR replace optocouplers in existing designs without layout changes?
No - ISO7041DBQR requires PCB layout adherence to TI's isolation barrier guidelines: minimum 3.7 mm creepage/clearance, no copper pours bridging sides, and dedicated ground planes split at the barrier. Unlike optocouplers, its QSOP package places VCC1/GND1 and VCC2/GND2 on opposite sides, demanding strict separation. However, its pinout (DBQ-16) is compatible with other TI ISO70xx devices, allowing drop-in replacement within the same family - but not with generic optocoupler footprints.
ISO7041DBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 2Mbps
- Propagation Delay tpLH / tpHL (Max):
- 165ns, 165ns
- Pulse Width Distortion (Max):
- 10ns
- Rise / Fall Time (Typ):
- 5ns, 5ns (Max)
- Voltage - Supply:
- 1.71V ~ 1.89V, 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
ISO7041DBQR FAQ
1.How can I place an order for ISO7041DBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7041DBQR 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 ISO7041DBQR reliable?
The price and inventory of ISO7041DBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7041DBQR is usually 5 days.
3.What payment methods are accepted for ISO7041DBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7041DBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7041DBQR?
ISO7041DBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7041DBQR 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 ISO7041DBQR?
For technical support, including ISO7041DBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7041DBQR requirements.
6.How does Aetrix verify that ISO7041DBQR is sourced from the original manufacturer or authorized distributors?
All ISO7041DBQR 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 ISO7041DBQR meets industry standards.
7.What is the process for return or replacement of ISO7041DBQR?
All ISO7041DBQR units undergo pre-shipment inspection (PSI). If there is an issue with ISO7041DBQR, 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 ISO7041DBQR part is unused and in its original packaging.
Return procedure for ISO7041DBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7041DBQR Tags
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