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Skyworks Solutions Inc. SI88222BD-ASR
- Part No.:
- SI88222BD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88222BD-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:2,661
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Product details
Overview
SI88222BD-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 5 W output power, supporting 100 Mbps data rate, 23 ns max propagation delay, and 5000 VRMS isolation. It operates across –40 to +125 °C and is AEC-Q100 qualified for automotive motor control and inverter gate drive applications.
For engineers reviewing the SI88222BD-ASR datasheet, SI88222BD-ASR pinout, SI88222BD-ASR application, or SI88222BD-ASR equivalent, key selection considerations include its SOIC-16 wide-body package, dual unidirectional channel configuration, integrated flyback controller with VSW/VSNS/COMP feedback, shutdown (SH) and soft-start (SS) support, and compatibility with 3–24 V input and 3–24 V isolated output configurations.
Technical Context
The SI88222BD-ASR implements RF-based capacitive isolation with on/off keying modulation across a silicon dioxide barrier, enabling robust noise immunity and magnetic field rejection without startup initialization. Its integrated DC-DC controller uses peak current mode control with closed-loop secondary-side voltage sensing via VSNS and internal error encoding across the isolation barrier.
It features an internal primary-side power switch (VSW), shutdown control (SH), soft-start timing (SS), and compensation network (COMP–GNDB) for stable regulation. The device supports low-voltage (3–5.5 V) and high-voltage (up to 24 V) input/output configurations using external transformers and optional external FETs (e.g., via ESW/RSN on other variants), though SI88222BD-ASR uses internal switching only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - enables reinforced insulation per UL 1577, CSA 62368-1, and VDE 62368-1. |
| Data Rate | Up to 100 Mbps - supports high-speed serial interfaces like SPI, RS-485, and CAN FD in isolated domains. |
| Propagation Delay | 23 ns max - ensures tight timing alignment in real-time control loops such as motor phase commutation. |
| DC-DC Output Power | Up to 5 W peak - powers isolated gate drivers, ADCs, and microcontrollers without external isolated supplies. |
| Operating Temp | –40 to +125 °C - certified for under-hood automotive and industrial environments with thermal shutdown protection. |
| Transient Immunity | 100 kV/µs typical - maintains signal integrity during fast-switching events in inverters and power converters. |
| AEC-Q100 Grade | Qualified - meets automotive reliability requirements including HTOL, TC, and ESD testing per AEC-Q100 Rev H. |
Pinout & Package
SI88222BD-ASR is housed in a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 2.65 mm height) with creepage/clearance ≥ 8.3 mm, rated for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDDP, VSW, GNDP, VDDA, GNDA, SH | Primary-side power stage and signal supply inputs; SH enables hardware shutdown of DC-DC converter. |
| 7, 8, 9, 10 | A1, A2, B1, B2 | Two unidirectional digital isolation channels: A1→B1 and A2→B2 (transmit-only directionality). |
| 11, 12, 13, 14, 15, 16 | GNDB, VDDB, VSNS, COMP, NC, DNC/VREGB | Secondary-side ground/power; VSNS senses isolated output voltage; COMP sets loop stability; DNC/VREGB is unused (≤5.5 V output). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based capacitive isolation | Eliminates optocoupler aging and enables >100-year lifetime with no LED degradation or CTR drift. |
| Integrated flyback DC-DC controller | Reduces BOM count by eliminating external PWM IC, error amplifier, and optocoupler feedback path. |
| Secondary-side voltage sensing (VSNS) | Enables ±1% load/line regulation without optocouplers-critical for precision isolated sensor biasing. |
| Programmable soft-start (SS pin) | Controls inrush current during power-up to prevent transformer saturation and system brownouts. |
| Shutdown control (SH pin) | Allows system-level power sequencing and fault recovery without cycling main supply rails. |
Applications
| Industrial Motor Control | Automotive Inverter Gate Drive |
|---|---|
Use Scenario: Isolating PWM signals and feedback from MCU to IGBT/SiC gate drivers in servo drives and VFDs. IC Role / Device Role / Timing Role: Dual-channel isolator providing independent forward-path PWM and reverse-path fault reporting with <23 ns skew. Use Value: Enables precise dead-time control and fast overcurrent response (<100 ns fault detection latency) in 20 kHz+ switching inverters. | Use Scenario: Isolating traction inverter control signals in HEV/EV power modules with onboard isolated DC-DC for gate driver supply. IC Role / Device Role / Timing Role: Provides galvanic separation between vehicle battery domain (400–800 V) and low-voltage MCU domain while powering isolated gate drivers. Use Value: Delivers 5 W regulated 15 V output to dual gate drivers, eliminating need for separate isolated DC-DC module and reducing PCB area by 35%. |
| Isolated Data Acquisition | PLC Digital I/O Modules |
Use Scenario: Isolating analog front-end ADC/DAC control lines and reference voltage monitoring in high-voltage energy metering systems. IC Role / Device Role / Timing Role: Transfers SPI clock/data and busy signals across isolation barrier while supplying isolated 3.3 V to ADC reference circuitry. Use Value: Maintains 16-bit ADC accuracy by eliminating ground loop noise and common-mode transients (>100 kV/µs immunity). | Use Scenario: Providing channel-to-channel and field-to-logic isolation in modular PLC backplanes with hot-swap capability. IC Role / Device Role / Timing Role: Isolates discrete input status (24 V DC) and output drive commands (relay/solid-state) with fail-safe default states. Use Value: Supports SIL-2 functional safety architecture via reinforced insulation and AEC-Q100 reliability, enabling certification without external redundancy. |
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; lower output power, no programmable frequency or soft-start. | Suitable for low-power isolated logic, not gate driver supply; lacks AEC-Q100 qualification. | Select when isolated power demand ≤500 mW and automotive qualification is not required. |
| ISO7821FDWWR | 2-channel isolator only-no integrated DC-DC; requires external isolated supply. | Used where board space allows separate DC-DC IC + isolator; higher design complexity but greater flexibility. | Select when output voltage or power requirements exceed SI88222BD-ASR's 5 W limit or custom regulation is needed. |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88222BD-ASR uniquely integrates 5 W isolated power, AEC-Q100 qualification, and programmable soft-start/shutdown-making it optimal for automotive inverters and industrial motor drives requiring self-contained, high-reliability isolation.
Availability
SI88222BD-ASR is available at Aetrix Electronics and suitable for industrial motor control, automotive inverter gate drive, and isolated data acquisition requiring stable component supply across extended temperature and high-reliability lifecycles.
Supply support for SI88222BD-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.
The Si88xx family was designed specifically for high-reliability isolated power and signal transfer in automotive, industrial, and energy infrastructure applications-emphasizing integration, safety certification, and EMI robustness.
FAQ
What is the maximum isolated DC-DC output power supported by SI88222BD-ASR?
SI88222BD-ASR supports up to 5 W peak isolated DC-DC output power. This is achieved using its integrated flyback controller driving an external miniature transformer and Schottky rectifier. The actual sustained output depends on transformer selection, layout, and thermal management-but 2 W average is typical at 5 V output. The device's internal power switch (VSW) and secondary-side feedback (VSNS) enable this high power density without external PWM ICs or optocouplers.
Does SI88222BD-ASR support bidirectional data transmission?
No, SI88222BD-ASR provides two unidirectional digital isolation channels: A1→B1 and A2→B2. Each channel is optimized for forward-direction signal transfer only. For bidirectional communication, external logic (e.g., direction control lines) or separate reverse-path isolators are required. This architecture minimizes propagation delay skew and maximizes timing predictability in critical control paths like PWM and fault reporting.
What isolation certifications does SI88222BD-ASR hold?
SI88222BD-ASR is certified to UL 1577 (5000 VRMS, 1 min), CSA 62368-1 (reinforced insulation), VDE 62368-1 (conformity), and CQC GB4943.1. It also meets VDE 60747-17 for basic insulation (pending). These certifications validate its suitability for safety-critical applications including automotive inverters and industrial PLCs requiring reinforced insulation barriers.
Can SI88222BD-ASR operate with 24 V input on the primary side?
Yes, SI88222BD-ASR supports 24 V primary-side input in high-voltage-to-low-voltage configurations (e.g., 24 V → 5 V). It uses its internal VSW switch and secondary-side VSNS feedback to regulate output. For 24 V input, a transformer with appropriate turns ratio (e.g., UMEC UTB02250s or Coilcraft TA7788-AL) and external Schottky diode must be used. The device's 100 kV/µs transient immunity ensures robust operation during bus transients.
What is the function of the DNC/VREGB pin on SI88222BD-ASR?
The DNC/VREGB pin on SI88222BD-ASR is designated "Do Not Connect" for all standard output voltages ≤5.5 V. It contains an internal Zener and is intended only as a voltage reference when configuring outputs >5.5 V using external NPN transistor support circuitry. Connecting it in ≤5.5 V designs may cause malfunction; it must remain floating or tied to GNDB per Skyworks' layout guidelines.
SI88222BD-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x2x
- Package/Case:
- 16-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:
- 0/2
- 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:
- 16-SOIC
SI88222BD-ASR FAQ
1.How can I place an order for SI88222BD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88222BD-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 SI88222BD-ASR reliable?
The price and inventory of SI88222BD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88222BD-ASR is usually 5 days.
3.What payment methods are accepted for SI88222BD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88222BD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88222BD-ASR?
SI88222BD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88222BD-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 SI88222BD-ASR?
For technical support, including SI88222BD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88222BD-ASR requirements.
6.How does Aetrix verify that SI88222BD-ASR is sourced from the original manufacturer or authorized distributors?
All SI88222BD-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 SI88222BD-ASR meets industry standards.
7.What is the process for return or replacement of SI88222BD-ASR?
All SI88222BD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88222BD-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 SI88222BD-ASR part is unused and in its original packaging.
Return procedure for SI88222BD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88222BD-ASR Tags
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ISO7741FDWR
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