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Skyworks Solutions Inc. SI88320ED-ASR
- Part No.:
- SI88320ED-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88320ED-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
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Product details
Overview
SI88320ED-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W of regulated 3.3 V or 5.0 V output power across 5 kVRMS reinforced isolation. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C. It is used in industrial PLCs and EV battery management systems requiring galvanic separation and local isolated power.
For engineers reviewing the SI88320ED-ASR datasheet, SI88320ED-ASR pinout, SI88320ED-ASR application, or SI88320ED-ASR equivalent, key selection criteria include its SOIC-20 wide-body package, SH_FC/SS programmable shutdown & soft-start, VSNS/COMP feedback loop design, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The SI88320ED-ASR implements RF-based capacitive isolation with on/off keying modulation across a silicon dioxide barrier, enabling robust noise immunity and zero initialization overhead. Its integrated flyback DC-DC controller uses peak current mode control, closed-loop secondary-side voltage sensing via VSNS, and internal compensation referenced to COMP.
It supports low-voltage input (3–5.5 V) to isolated 3.3/5.0 V output configurations, with externally adjustable switching frequency (200–800 kHz) via SH_FC and SS pins, plus programmable soft-start using an external capacitor on SS. Shutdown is asserted high on SH_FC (Pin 7), and thermal protection activates at safe junction temperature thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577, VDE 62368-1, CSA 62368-1) |
| Data Rate | Up to 100 Mbps - enables high-speed serial communication (e.g., SPI, RS-485 interface isolation) |
| Propagation Delay | 23 ns max - ensures tight timing alignment in real-time control loops |
| DC-DC Output Power | 2 W average (5 V @ 400 mA) - sufficient to power secondary-side MCU, ADC, or gate drivers |
| Operating Temp | –40 °C to +125 °C - supports under-hood automotive and industrial ambient conditions |
| Transient Immunity | 100 kV/µs (typical) - withstands fast EFT/burst events in motor drive and power supply environments |
| AEC-Q100 Grade | Qualified per Rev G - meets automotive reliability and stress-test requirements |
Pinout & Package
SI88320ED-ASR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch) with creepage/clearance ≥8.3 mm, certified for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | GNDP / VSW / VDDP / VDDA / GNDA / SH_FC | Primary-side ground, internal switch output, primary power input, signal power, signal ground, and shutdown/frequency control |
| 7, 8, 9, 10 | SS / NC / A1 / A2 | Soft-start timing input, no-connect, forward channel inputs (Side A) |
| 11, 12, 13, 14 | B1 / B2 / NC / NC | Forward channel outputs (Side B), no-connect pins |
| 15, 16, 17, 18, 19, 20 | GNDB / VDDB / VSNS / COMP / NC / NC | Secondary-side ground, signal power, feedback sense, compensation network node, and no-connect |
Key Features
| Feature | Design Value |
|---|---|
| RF-based capacitive isolation | Eliminates optocoupler aging and enables >100-year lifetime with no startup initialization |
| Secondary-side voltage sensing | VSNS feedback eliminates need for optocouplers or auxiliary bias circuits, improving load regulation |
| Programmable soft-start (SS) | External capacitor sets inrush current ramp time - prevents input rail collapse during cold start |
| Adjustable switching frequency (SH_FC) | 200–800 kHz tuning avoids EMI-sensitive bands and eases filter design |
| Integrated thermal shutdown | Protects against sustained overloads without external circuitry - maintains system safety integrity |
| AEC-Q100 qualified | Validated for automotive use including PPAP documentation and IMDS/CAMDS compliance support |
Applications
| Industrial PLC I/O Modules | EV Battery Management Systems |
|---|---|
Use Scenario: Isolating analog sensor inputs and digital control signals between field-side I/O and CPU backplane in modular PLC racks. IC Role / Device Role / Timing Role: Dual-channel isolator providing galvanic separation for 24 V digital inputs and powering isolated ADC reference supplies via integrated DC-DC. Use Value: Eliminates external isolated DC-DC converters and reduces BOM count by 3+ components while maintaining 5 kVRMS creepage. |
Use Scenario: Signal isolation and local power delivery for cell monitoring ICs in high-voltage battery packs (up to 1000 V bus). IC Role / Device Role / Timing Role: Isolating UART/SPI communications from MCU to front-end monitor ICs and supplying regulated 3.3 V to those ICs across reinforced barrier. Use Value: Enables single-component solution for both data and power isolation, meeting ASIL-B functional safety requirements with AEC-Q100 qualification. |
| Isolated Industrial Power Supplies | Motor Drive Gate Driver Interfaces |
Use Scenario: Providing isolated feedback and auxiliary power in 3 kW AC-DC PSUs with digital PFC controllers. IC Role / Device Role / Timing Role: Delivering isolated 5 V to secondary-side PWM controller while transmitting voltage/current sense data across barrier. Use Value: Replaces discrete optocoupler + isolated buck converter, reducing layout area by 40% and improving transient response via direct VSNS sensing. |
Use Scenario: Isolating gate drive signals and powering high-side gate driver ICs in three-phase inverters for HVAC compressors. IC Role / Device Role / Timing Role: Transmitting PWM edges with <23 ns skew and supplying 5 V to isolated gate driver ICs (e.g., Si823x) on inverter leg PCBs. Use Value: Guarantees precise timing alignment across phases and eliminates need for separate isolated bias rails, simplifying thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated DC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6210ARWZ | 2-channel isolator + 500 mW isolated DC-DC; SOIC-16; no frequency/soft-start adjustment | Limited to low-power loads (<100 mA); lacks AEC-Q100 qualification | Choose for cost-sensitive non-automotive designs where <500 mW secondary power suffices |
| ISO7821FDWR | Dual-channel isolator only - no integrated DC-DC; requires external isolated power supply | Increases BOM and layout complexity; no local power generation capability | Choose when existing isolated power rail is available and higher data integrity (CMTI >100 kV/µs) is prioritized |
Compared with ADUM6210ARWZ and ISO7821FDWR, SI88320ED-ASR uniquely delivers 2 W isolated power with programmable soft-start and frequency control in an AEC-Q100-qualified SOIC-20 package - making it the only option supporting automotive-grade motor control and industrial PLCs requiring self-contained power and signal isolation.
Availability
SI88320ED-ASR is available at Aetrix Electronics and suitable for industrial automation systems, hybrid electric vehicle battery management, and isolated power supplies requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for SI88320ED-ASR 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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies for high-reliability applications.
The Si88x2x family - including SI88320ED-ASR - was designed to replace optocoupler-based isolation with integrated power delivery in demanding industrial and automotive systems, emphasizing safety certification, EMI resilience, and extended temperature operation.
FAQ
What is the maximum isolated output power of the SI88320ED-ASR?
The SI88320ED-ASR delivers up to 2 W average isolated output power at 5.0 V (400 mA), sufficient to power secondary-side microcontrollers, ADCs, or gate drivers without external DC-DC stages. Peak power capability reaches 5 W briefly, but continuous operation is rated at 2 W under thermal limits specified in the datasheet. This output is regulated and sensed directly on the secondary side via the VSNS pin.
Does the SI88320ED-ASR support programmable switching frequency?
Yes, the SI88320ED-ASR supports externally programmable switching frequency from 200 kHz to 800 kHz using the SH_FC (Pin 7) and SS (Pin 8) pins with an external RC network. This allows EMI optimization by avoiding sensitive frequency bands and tailoring loop response for specific transformer designs - a feature not present in earlier Si882xx variants.
What is the role of the VSNS and COMP pins on the SI88320ED-ASR?
The VSNS pin receives feedback from a resistor divider on the isolated output to enable precise secondary-side voltage regulation, eliminating optocouplers. The COMP pin connects to an external RC network (RCOMP = 49.9 kΩ, CCOMP calculated per crossover frequency) to stabilize the DC-DC control loop. Both pins are essential for closed-loop operation and must be populated per AN892 design guidelines.
Is the SI88320ED-ASR qualified for automotive applications?
Yes, the SI88320ED-ASR is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C) and supported with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and automotive-specific manufacturing flows. It meets reinforced insulation requirements per VDE 62368-1 and UL 1577, making it suitable for battery management, inverter control, and ADAS subsystems.
Can the SI88320ED-ASR operate with input voltages above 5.5 V?
No - the SI88320ED-ASR is designed for low-voltage input (3.0–5.5 V) to isolated 3.3/5.0 V output. For inputs >5.5 V (e.g., 12 V or 24 V), Skyworks recommends the Si8842x or Si8862x families, which feature external switch drivers (ESW), current sense (RSN), and high-voltage optimized controllers. Using SI88320ED-ASR beyond 5.5 V violates absolute maximum ratings and risks permanent damage.
SI88320ED-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x2x
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 40kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 18ns, 23ns
- Pulse Width Distortion (Max):
- 7ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SI88320ED-ASR FAQ
1.How can I place an order for SI88320ED-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88320ED-ASR 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 SI88320ED-ASR reliable?
The price and inventory of SI88320ED-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88320ED-ASR is usually 5 days.
3.What payment methods are accepted for SI88320ED-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88320ED-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88320ED-ASR?
SI88320ED-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88320ED-ASR 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 SI88320ED-ASR?
For technical support, including SI88320ED-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88320ED-ASR requirements.
6.How does Aetrix verify that SI88320ED-ASR is sourced from the original manufacturer or authorized distributors?
All SI88320ED-ASR 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 SI88320ED-ASR meets industry standards.
7.What is the process for return or replacement of SI88320ED-ASR?
All SI88320ED-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88320ED-ASR, 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 SI88320ED-ASR part is unused and in its original packaging.
Return procedure for SI88320ED-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88320ED-ASR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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