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Texas Instruments ISO7820LLDW
- Part No.:
- ISO7820LLDW
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7820LLDW.pdf
- Description:
- DGTL ISO 5700VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:160
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Product details
Overview
ISO7820LLDW from Texas Instruments is a reinforced isolated dual-LVDS buffer with 8000-VPK isolation voltage, two forward-direction channels, 100-Mbps signaling rate, ±100-kV/μs CMTI, and operation from –55°C to +125°C ambient. It isolates high-speed LVDS buses in motor control and medical equipment while maintaining signal integrity across galvanic barriers.
For engineers reviewing the ISO7820LLDW datasheet, ISO7820LLDW pinout, ISO7820LLDW application, or ISO7820LLDW equivalent, this page delivers verified specifications, SOIC-16 DW package terminal mapping, functional role per pin, real-world use cases in industrial automation and test systems, and two validated alternative parts for design flexibility.
Technical Context
The ISO7820LLDW implements two unidirectional LVDS channels separated by a silicon dioxide (SiO₂) insulation barrier, each with independent input-side (VCCI/GNDI) and output-side (VCCO/GNDO) power domains. Its architecture supports differential signaling compliant with TIA/EIA-644-A and enables robust noise immunity in noisy environments.
It features dual enable inputs (EN1, EN2) controlling high-impedance states on respective channel outputs, low propagation delay (17 ns typical), and integrated safety limiting to protect the isolation barrier under fault conditions. The device meets reinforced isolation requirements per DIN V VDE V 0884-10 and UL 1577.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 8000-VPK reinforced isolation - ensures long-term reliability in high-voltage industrial and medical systems requiring double insulation. |
| Signaling Rate | Up to 100 Mbps - supports high-speed serial links such as encoder feedback or real-time sensor data transmission. |
| CMTI | ±100 kV/μs minimum - rejects fast transients common in motor drives and switch-mode power supplies without data corruption. |
| Supply Range | 2.25 V to 5.5 V per side - allows interoperability with 2.5-V, 3.3-V, and 5-V logic domains on isolated sides. |
| Operating Temperature | –55°C to +125°C ambient - qualified for under-hood automotive, industrial PLC, and aerospace-adjacent applications. |
| Propagation Delay | 17 ns typical - enables precise timing-critical applications like synchronized multi-axis motion control. |
| LVDS Compliance | TIA/EIA-644-A compliant - guarantees interoperability with standard LVDS transceivers and receivers without level-shifting. |
Pinout & Package
ISO7820LLDW is housed in a wide-body 16-pin SOIC (DW) package measuring 10.30 mm × 7.50 mm, optimized for creepage/clearance >8 mm and reinforced isolation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA+, INA− | Differential LVDS input, Channel A | Accepts standard LVDS signals from controller-side sources; referenced to VCCI/GNDI. |
| INB+, INB− | Differential LVDS input, Channel B | Second forward-channel input; electrically isolated from Channel A and output side. |
| OUTA+, OUTA− | Differential LVDS output, Channel A | Drives downstream LVDS receivers on isolated side; powered by VCCO/GNDO. |
| OUTB+, OUTB− | Differential LVDS output, Channel B | Second isolated output channel; supports independent termination and routing. |
| EN1, EN2 | Output enable controls | High or open = active output; low = high-impedance state - enables bus sharing and power sequencing. |
| VCCI, GNDI | Input-side power and ground | Supplies input buffers only; galvanically isolated from output domain. |
| VCCO, GNDO | Output-side power and ground | Supplies output drivers only; supports independent voltage scaling (e.g., 3.3 V in, 5 V out). |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Certification | 8000-VPK surge withstand and 5700-VRMS 1-min rating per UL 1577 and DIN V VDE V 0884-10 - eliminates need for external isolation components in safety-critical designs. |
| Low Power at 100 Mbps | Typical 4.3 mA (side 1) + 14.2 mA (side 2) at 5 V - reduces thermal load in densely packed enclosures and extends system-level energy efficiency. |
| High EMI Immunity | System-level ESD (±4.5 kV HBM), EFT, and surge immunity - simplifies EMC compliance testing for IEC 61000-4-x standards. |
| Long Barrier Life | >40 years at rated working voltage - validated via TDDB modeling for mission-critical infrastructure with extended service life. |
| Wide Supply Flexibility | 2.25–5.5 V on both sides - accommodates mixed-voltage systems and brown-out resilience without external regulators. |
Applications
| Motor Control | Test and Measurement |
|---|---|
Use Scenario: Isolating position encoder signals between servo drive and FPGA-based motion controller in variable-frequency drives. IC Role / Device Role / Timing Role: Dual forward LVDS buffer transmitting quadrature A/B and index signals across isolation barrier with <17 ns delay and no skew-induced phase error. Use Value: Prevents ground-loop noise from corrupting high-resolution encoder data, enabling sub-micron positioning accuracy. | Use Scenario: Transmitting high-speed digital waveform data from isolated ADC front-end to host processor in portable oscilloscopes. IC Role / Device Role / Timing Role: LVDS channel pair preserving signal integrity of 100-Mbps sampled data streams while blocking common-mode noise from switching power supplies. Use Value: Maintains <1 ns peak-to-peak jitter (tie) for accurate time-domain reconstruction and FFT fidelity. |
| Industrial Automation | Medical Equipment |
Use Scenario: Interfacing isolated PLC I/O modules with backplane LVDS buses in hazardous-area control cabinets. IC Role / Device Role / Timing Role: Forward-direction dual-buffer providing galvanic separation between field-side sensors and CPU-side communication ASICs. Use Value: Meets CSA/IEC 60950-1 reinforced insulation requirements and supports 25-year product lifecycle commitments. | Use Scenario: Isolating patient-connected analog front-end data paths from digital processing units in MRI gradient control systems. IC Role / Device Role / Timing Role: Reinforced-isolation LVDS interface meeting 2 MOPP requirements per IEC 60601-1 and GB4943.1-2011. Use Value: Enables safe 8000-VPK transient protection against defibrillator pulses without compromising signal bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated LVDS buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7821LLDW | One forward + one reverse channel vs. ISO7820LLDW's two forward channels; identical isolation, CMTI, and supply specs. | Suitable for bidirectional link topologies (e.g., daisy-chained sensors), not unidirectional broadcast architectures. | Select ISO7821LLDW only when reverse-channel capability is required; otherwise ISO7820LLDW provides optimal channel alignment. |
| ADN4651BRSZ | Single-channel, 100-Mbps isolated LVDS buffer; 5 kV RMS isolation (not reinforced); smaller 20-lead SSOP package. | Limited to single-link isolation; lacks 8000-VPK surge rating and medical/industrial safety certifications. | Use ADN4651BRSZ only in non-safety-critical, space-constrained consumer or lab-grade systems where reinforced certification is unnecessary. |
Compared with ISO7821LLDW and ADN4651BRSZ, ISO7820LLDW uniquely delivers dual forward LVDS channels with certified 8000-VPK reinforced isolation - making it the only choice for high-reliability, unidirectional industrial data acquisition where barrier lifetime and regulatory compliance are mandatory.
Availability
ISO7820LLDW is available at Aetrix Electronics and suitable for motor control, test and measurement, and industrial automation applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ISO7820LLDW 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 interface solutions for industrial, automotive, and medical markets.
The ISO782xLL family was designed specifically to address high-speed, reinforced-isolation challenges in LVDS-based real-time control systems - delivering certified safety, low jitter, and robust EMC performance without sacrificing data rate or power efficiency.
FAQ
What is the isolation voltage rating of the ISO7820LLDW?
The ISO7820LLDW has a reinforced isolation rating of 8000 VPK transient isolation voltage and 5700 VRMS for 1 minute per UL 1577. It also meets 2121 VPK maximum repetitive peak isolation voltage (AC) and 1500 VRMS maximum working voltage per DIN V VDE V 0884-10. These ratings are validated for the DW package and apply across its full temperature range.
Does the ISO7820LLDW support bidirectional LVDS communication?
No, the ISO7820LLDW supports two forward-direction LVDS channels only - signals flow from input side (INA+/INA−, INB+/INB−) to output side (OUTA+/OUTA−, OUTB+/OUTB−). For bidirectional operation, TI recommends the ISO7821LLDW, which provides one forward and one reverse channel. The ISO7820LLDW pinout and internal architecture do not support reverse data flow.
What are the supply voltage requirements for ISO7820LLDW operation?
The ISO7820LLDW requires separate supplies: VCCI (2.25 V to 5.5 V) powers the input-side LVDS receivers, and VCCO (2.25 V to 5.5 V) powers the output-side LVDS drivers. Both domains operate independently; VCCI and VCCO may differ (e.g., 3.3 V in, 5 V out). Undervoltage lockout activates below 1.7 V on either rail, ensuring predictable reset behavior.
How does the enable functionality work on ISO7820LLDW?
The ISO7820LLDW uses EN1 and EN2 pins to place the respective channel outputs into high-impedance state. When EN1 is low, OUTA+/OUTA− go Hi-Z; when EN2 is low, OUTB+/OUTB− go Hi-Z. EN pins have internal pull-ups, so leaving them unconnected enables both channels. Propagation delay from enable assertion to valid output is 10–20 ns, and disable time is similarly specified.
Is ISO7820LLDW certified for medical applications?
Yes - the ISO7820LLDW is planned for certification to IEC 60601-1 (2 MOPP), CSA Component Acceptance Notice 5A, and GB4943.1-2011. Its 8000-VPK reinforced isolation, 250-VRMS maximum working voltage (DW package), and 2 MOPP classification make it suitable for patient-connected medical subsystems including MRI gradient control and diagnostic imaging interfaces.
ISO7820LLDW 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:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5700Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 25ns, 25ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- -
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7820LLDW FAQ
1.How can I place an order for ISO7820LLDW through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7820LLDW 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 ISO7820LLDW reliable?
The price and inventory of ISO7820LLDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7820LLDW is usually 5 days.
3.What payment methods are accepted for ISO7820LLDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7820LLDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7820LLDW?
ISO7820LLDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7820LLDW 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 ISO7820LLDW?
For technical support, including ISO7820LLDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7820LLDW requirements.
6.How does Aetrix verify that ISO7820LLDW is sourced from the original manufacturer or authorized distributors?
All ISO7820LLDW 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 ISO7820LLDW meets industry standards.
7.What is the process for return or replacement of ISO7820LLDW?
All ISO7820LLDW units undergo pre-shipment inspection (PSI). If there is an issue with ISO7820LLDW, 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 ISO7820LLDW part is unused and in its original packaging.
Return procedure for ISO7820LLDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7820LLDW Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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