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Skyworks Solutions Inc. SI88222EC-IS
- Part No.:
- SI88222EC-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88222EC-IS.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,763
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Product details
Overview
SI88222EC-IS 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 isolation. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps max data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C in industrial and automotive systems requiring reinforced insulation.
For engineers reviewing the SI88222EC-IS datasheet, SI88222EC-IS pinout, SI88222EC-IS application, or SI88222EC-IS equivalent, this device serves as a complete signal + power isolation solution for motor control gate drivers, PLC I/O modules, and isolated ADC interfaces where compact size, high CMTI (>100 kV/µs), and AEC-Q100 qualification are critical selection criteria.
Technical Context
The SI88222EC-IS implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for robust noise immunity and zero initialization latency. Its digital isolator side uses independent UVLO monitors on both VDDA and VDDB rails, ensuring fail-safe behavior during asymmetric power sequencing.
The integrated flyback DC-DC controller operates in peak current mode with closed-loop secondary-side voltage sensing via VSNS, eliminating optocouplers. It supports low-voltage input (3–5.5 V) to 3.3/5.0 V output configurations using internal VSW switches and requires external transformer, rectifier diode, and feedback resistors R1/R2.
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 real-time PWM and serial interface isolation in servo drives |
| Propagation Delay | 23 ns max - ensures tight timing alignment between isolated control and feedback signals |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side microcontrollers and sensors |
| CMTI | 100 kV/µs typical - prevents false triggering in high-dv/dt motor drive environments |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports automotive functional safety requirements |
Pinout & Package
SI88222EC-IS is housed in a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 2.3 mm height) with creepage/clearance ≥8.3 mm, certified for reinforced insulation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GNDP | Primary-side power ground - connects directly to VDDP return path; must be short-traced to minimize EMI |
| 2 | VSW | Internal switch output - drives transformer primary; rated ≤5.5 V; no external FET required in low-Vin config |
| 3 | VDDP | Primary-side power supply input - accepts 3.0–5.5 V; powers internal DC-DC controller and transmitter |
| 4 | VDDA | Primary-side signal supply - powers A1/A2 transmitter circuits; independent UVLO threshold |
| 5 | GNDA | Primary-side signal ground - separate from GNDP to maintain isolation integrity |
| 6 | SH | Shutdown control - logic-high disables DC-DC converter; tied to GND for normal operation |
| 7 | A1 | Channel 1 forward input - unidirectional digital input from primary side to secondary side |
| 8 | A2 | Channel 2 forward input - second unidirectional input; supports independent signal routing |
| 9 | B1 | Channel 1 forward output - isolated output corresponding to A1; CMOS-compatible swing |
| 10 | B2 | Channel 2 forward output - isolated output corresponding to A2; matches A1/A2 timing specs |
| 11 | GNDB | Secondary-side signal ground - reference for VDDB and B1/B2 outputs |
| 12 | VDDB | Secondary-side signal supply - powered by internal DC-DC; supplies B1/B2 receivers |
| 13 | VSNS | Feedback sense input - connects to resistor divider on secondary side to regulate VOUT |
| 14 | COMP | Compensation node - external RC network (RCOMP = 49.9 kΩ + CCOMP) stabilizes DC-DC loop |
| 15 | NC | No connect - not bonded; must remain floating |
| 16 | DNC/VREGB | Do-not-connect / voltage reference - Zener-connected; used only if VOUT > 5.5 V; otherwise left open |
Key Features
| Feature | Design Value |
|---|---|
| RF-based digital isolation | Eliminates startup delay and clock dependency; immune to magnetic fields and EMI |
| Secondary-side voltage sensing | Enables precise line/load regulation without optocouplers or auxiliary bias windings |
| Integrated soft-start and shutdown | Reduces inrush current and allows system-level power sequencing control via SH pin |
| High CMTI (100 kV/µs) | Prevents metastability in fast-switching IGBT/SiC gate driver feedback paths |
| AEC-Q100 qualification | Validated for automotive applications including battery management and traction inverters |
Applications
| Motor Control Gate Driver Isolation | PLC Digital I/O Module |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and half-bridge gate drivers in servo/inverter systems. IC Role / Device Role / Timing Role: SI88222EC-IS provides dual-channel signal isolation plus local 5 V power for gate driver ICs and current-sense amplifiers. Use Value: Enables compact, single-chip isolation + power architecture with <23 ns channel-to-channel skew and 5 kVRMS withstand. |
Use Scenario: Providing isolated digital input/output channels in modular programmable logic controller backplanes. IC Role / Device Role / Timing Role: SI88222EC-IS delivers two independent forward channels (A→B) with simultaneous 100 Mbps capability for high-speed status reporting. Use Value: Replaces discrete optocoupler + isolated DC-DC combinations, reducing BOM count and PCB area by >40%. |
| Automotive Battery Management System | Isolated Data Acquisition Front-End |
Use Scenario: Isolating cell voltage monitoring and balancing signals between high-voltage battery stack and MCU in EVs. IC Role / Device Role / Timing Role: SI88222EC-IS supplies isolated 3.3 V power and transmits analog front-end ADC status and trigger signals across 5 kVRMS barrier. Use Value: Meets AEC-Q100 Grade 1 requirements and supports ASIL-B functional safety decomposition via reinforced insulation. |
Use Scenario: Isolating SPI or parallel bus signals between precision ADCs and host processors in test equipment. IC Role / Device Role / Timing Role: SI88222EC-IS acts as a timing-critical digital isolator with sub-25 ns propagation delay for synchronized sampling clocks and data lines. Use Value: Maintains signal integrity at 100 Mbps while rejecting common-mode transients >100 kV/µs in noisy industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6210ARWZ | 2-channel isolator + 500 mW isolated DC-DC; lower output power; no AEC-Q100 rating | Suitable for non-automotive industrial I/O where <1 W load is acceptable | Select when board space is constrained but full 2 W output is unnecessary |
| ISO7821FDWWR | 2-channel isolator only - no integrated DC-DC; requires external isolated power supply | Used where system already provides isolated 3.3/5 V rail and only signal isolation is needed | Choose when higher reliability is prioritized over integration, or when thermal budget limits on-chip power conversion |
Compared with ADUM6210ARWZ and ISO7821FDWWR, the SI88222EC-IS uniquely combines AEC-Q100 qualification, 2 W isolated power, and 100 Mbps performance in a single SOIC-16 package-making it optimal for space-constrained automotive and industrial designs requiring self-contained isolation.
Availability
SI88222EC-IS is available at Aetrix Electronics and suitable for motor control gate drivers, PLC I/O modules, automotive battery management systems, and isolated data acquisition requiring stable component supply across extended temperature and regulatory-compliant production cycles.
Supply support for SI88222EC-IS 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 wireless, automotive, and industrial markets.
The Si88x2x family was designed specifically to replace optocoupler + isolated DC-DC combinations in high-reliability, high-noise environments-delivering integrated signal + power isolation with AEC-Q100 compliance and 5 kVRMS reinforced insulation.
FAQ
What is the maximum continuous output power of the SI88222EC-IS DC-DC converter?
The SI88222EC-IS delivers up to 2 W average output power at 5.0 V in low-voltage configurations (3–5.5 V input). Peak power reaches 5 W transiently. This output powers the secondary-side VDDB rail and external loads such as gate drivers or ADCs, eliminating need for discrete isolated DC-DC stages. The SI88222EC-IS achieves this using internal VSW switches and secondary-side feedback via VSNS.
Does the SI88222EC-IS support bidirectional communication between isolated domains?
No, the SI88222EC-IS provides two unidirectional forward channels only (A1→B1 and A2→B2). It does not support reverse-direction signaling or configurable channel direction. For bidirectional isolation, designers must pair SI88222EC-IS with complementary devices or select alternate Skyworks parts like Si88322EC-IS, which offers two forward + two reverse channels.
How is the output voltage of the SI88222EC-IS DC-DC converter set and regulated?
The SI88222EC-IS regulates output voltage via a resistor divider (R1/R2) connected to the VSNS pin on the secondary side. The internal error amplifier compares VSNS voltage to a 1.22 V reference and transmits correction across the isolation barrier to adjust duty cycle. The formula is VOUT = 1.22 × (1 + R1/R2). This secondary-side sensing eliminates optocouplers and improves line/load regulation.
What is the purpose of the DNC/VREGB pin on the SI88222EC-IS?
The DNC/VREGB pin is a Zener-referenced output used only when configuring the SI88222EC-IS for >5.5 V isolated output voltages. In standard 3.3/5.0 V operation, it must be left unconnected (DNC). When VOUT exceeds 5.5 V, VREGB provides a stable reference for external NPN transistor-based regulation of VDDB, enabling higher secondary-side supply rails without additional LDOs.
Is the SI88222EC-IS pin-compatible with other Si8822x variants like SI88220EC-IS or SI88221EC-IS?
No, SI88222EC-IS has a unique pinout optimized for dual forward channels (A1/A2 → B1/B2), differing from SI88220EC-IS (two reverse channels) and SI88221EC-IS (one forward + one reverse). Pin functions such as A1/A2 and B1/B2 are fixed per variant; direct substitution requires PCB layout revision. Always verify pin mapping using Figure 1 in the SI8822x datasheet before replacement.
SI88222EC-IS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- 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:
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI88222EC-IS FAQ
1.How can I place an order for SI88222EC-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88222EC-IS 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 SI88222EC-IS reliable?
The price and inventory of SI88222EC-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88222EC-IS is usually 5 days.
3.What payment methods are accepted for SI88222EC-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88222EC-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88222EC-IS?
SI88222EC-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88222EC-IS 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 SI88222EC-IS?
For technical support, including SI88222EC-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88222EC-IS requirements.
6.How does Aetrix verify that SI88222EC-IS is sourced from the original manufacturer or authorized distributors?
All SI88222EC-IS 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 SI88222EC-IS meets industry standards.
7.What is the process for return or replacement of SI88222EC-IS?
All SI88222EC-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI88222EC-IS, 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 SI88222EC-IS part is unused and in its original packaging.
Return procedure for SI88222EC-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88222EC-IS 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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