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Skyworks Solutions Inc. SI88222EC-ASR
- Part No.:
- SI88222EC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88222EC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SI88222EC-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W output power at 3.3 V or 5.0 V, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and reinforced isolation rated at 5000 VRMS. It serves as a self-powered signal isolator in industrial motor control and EV inverter gate drive circuits.
For engineers reviewing the SI88222EC-ASR datasheet, SI88222EC-ASR pinout, SI88222EC-ASR application, or SI88222EC-ASR equivalent, key selection criteria include its SOIC-16 wide-body package, dual unidirectional channel configuration (A1/A2 → B1/B2), integrated flyback controller with soft-start and shutdown, and AEC-Q100 qualification for automotive-grade designs.
Technical Context
The SI88222EC-ASR implements RF-based capacitive isolation using on/off keying modulation across a silicon dioxide barrier, enabling robust noise immunity and no startup initialization. Its integrated DC-DC converter operates in peak current mode control with closed-loop feedback via VSNS/COMP pins and supports low-voltage input (3–5.5 V) to isolated 3.3/5.0 V output.
It features internal primary-side power switches (VSW), programmable shutdown (SH pin), and thermal protection. Pin-compatible variants include Si88220 (no DC-DC) and Si88221 (single-channel isolator + DC-DC), but SI88222EC-ASR uniquely provides two forward channels (A1/A2 → B1/B2) with no reverse channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets UL 1577, CSA 62368-1, VDE 62368-1 reinforced insulation requirements |
| Data Rate | Up to 100 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and PWM feedback loops |
| Propagation Delay | ≤23 ns max - enables precise timing-critical applications such as IGBT gate driver synchronization |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side logic (e.g., MCU I/O, ADC reference, gate driver bias) |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| Transient Immunity | 100 kV/µs typical - ensures reliable operation in high-noise motor drive and inverter systems |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports PPAP documentation and IMDS/CAMDS compliance for automotive OEMs |
Pinout & Package
SI88222EC-ASR uses a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 1.27 mm pitch) with creepage/clearance ≥8.3 mm across the isolation barrier.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | A1, A2, GNDA, VDDA | Primary-side digital I/O channels and supply - A1/A2 accept CMOS inputs; VDDA powers primary-side isolator logic (3–5.5 V) |
| 5, 6, 7, 8 | GNDP, SH, GNDB, VDDB | DC-DC primary ground, shutdown control, secondary ground, and secondary supply - SH asserted high disables DC-DC; VDDB powers secondary-side logic (3.3/5.0 V) |
| 9–12 | B1, B2, HF XMTR, HF RCVR | Secondary-side outputs and RF interface - B1/B2 drive CMOS loads; HF pins are internal RF paths, not user-accessible |
| 13–16 | VSW, VSNS, COMP, NC | Internal switch output, feedback sense, compensation node, and no-connect - VSW drives external transformer; VSNS/COMP set output voltage and loop stability |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive RF isolation | Eliminates optocoupler aging and temperature drift; achieves 18 ns typical prop delay without calibration |
| Integrated flyback controller | Reduces BOM by eliminating external PWM IC, error amp, and optocoupler - requires only transformer, diode, and two resistors |
| Secondary-side voltage sensing | Enables ±1% load regulation without optocoupler bias circuitry - improves long-term reliability over opto-based solutions |
| Soft-start (SS pin) | External capacitor sets ramp time to limit inrush current into secondary-side capacitance - prevents VDDB rail collapse during power-up |
| Shutdown (SH pin) | Logic-high assertion disables DC-DC while preserving isolator functionality - enables system-level power sequencing and fault recovery |
Applications
| Industrial Motor Control | EV Inverter Gate Drive |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase IGBT/SiC gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Dual-channel isolator providing independent forward paths (A1→B1, A2→B2) for gate enable and DESAT feedback, with self-supplied 5 V for driver bias. Use Value: Eliminates need for separate isolated DC-DC module; 23 ns prop delay ensures <50 ns total gate-control latency, critical for short-circuit protection. |
Use Scenario: Signal isolation in traction inverter control units where MCU must command gate drivers and receive overcurrent/temperature alerts across 1000 V DC bus. IC Role / Device Role / Timing Role: Reinforced-isolation barrier (5000 VRMS) separating low-voltage control domain from high-voltage power stage; supplies 5 V to isolated gate driver ICs. Use Value: AEC-Q100 qualification and 100 kV/µs CMTI meet ISO 26262 ASIL-B requirements; eliminates external regulator and optocouplers in compact inverter PCB layout. |
| Programmable Logic Controller (PLC) | Isolated Data Acquisition |
Use Scenario: Digital I/O isolation in modular PLC backplanes, where field-side sensors/actuators interface with CPU via isolated 24 V logic. IC Role / Device Role / Timing Role: Dual unidirectional isolator converting 24 V field signals to 3.3 V MCU logic; DC-DC powers isolated 24 V level-shifters and comparators. Use Value: SOIC-16 wide-body package meets IPC-2221 creepage requirements for 250 V AC mains; integrated DC-DC reduces board area vs. discrete isolator + DC-DC combo. |
Use Scenario: Isolating analog front-end (AFE) SPI buses and alarm lines in high-voltage battery monitoring systems (e.g., 800 V EV packs). IC Role / Device Role / Timing Role: SPI clock/data isolation with precise timing (100 Mbps, 23 ns delay); DC-DC powers isolated ADC reference and LDO for AFE. Use Value: Sub-25 ns propagation delay preserves SPI timing margins at 20+ MHz SCLK; 5000 VRMS rating supports CAT III 1000 V measurement safety standards. |
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 |
|---|---|---|---|
| ADUM6223ARWZ | Two-channel isolator + isolated 5 V DC-DC (150 mW), lower power, no soft-start or shutdown pin | Targeted at low-power MCU peripherals; insufficient for gate driver bias or high-current AFEs | Select when system load <150 mW and AEC-Q100 not required |
| ISO7821FDWR | Dual-channel isolator only - no integrated DC-DC; requires external isolated power supply | Suitable only when isolated 5 V rail already exists; adds BOM cost and layout complexity | Select when existing isolated power architecture precludes integrated converter use |
Compared with ADUM6223ARWZ and ISO7821FDWR, SI88222EC-ASR delivers 13× higher isolated power (2 W vs. 150 mW), includes dedicated SH/SS pins for system-level power control, and is AEC-Q100 qualified - making it the only option meeting automotive inverter and industrial servo requirements without external DC-DC components.
Availability
SI88222EC-ASR is available at Aetrix Electronics and suitable for industrial motor control, EV inverter gate drive, and isolated data acquisition requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for SI88222EC-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 Si88x2x product line was designed specifically for high-reliability isolated power and signal transfer in automotive and industrial systems, integrating robust capacitive isolation with flexible flyback DC-DC conversion in single-package form.
FAQ
What is the maximum supported data rate for SI88222EC-ASR?
The SI88222EC-ASR supports a maximum data rate of 100 Mbps across both isolation channels. This is confirmed in the datasheet's "Key Features" section and validated under worst-case conditions (–40 °C to +125 °C, VDD = 3.3 V). The device maintains this rate without derating, making it suitable for high-speed SPI, digital encoder, and fast PWM applications. SI88222EC-ASR achieves this using RF-based on/off keying modulation, which avoids pulse-width distortion common in capacitive isolators with edge-detection schemes.
Does SI88222EC-ASR provide reverse-direction isolation channels?
No, SI88222EC-ASR provides two unidirectional forward channels only (A1 → B1 and A2 → B2). Unlike Si88221 (one forward + one reverse) or Si88220 (two forward + two reverse), the SI88222EC-ASR variant is configured exclusively for forward signal flow. This is explicitly shown in Figure 1 of the datasheet, where pins 9–12 are labeled B1, B2, HF XMTR, HF RCVR - confirming B1/B2 as outputs only. SI88222EC-ASR does not support bidirectional communication on either channel.
Can SI88222EC-ASR generate an isolated 24 V output?
No, SI88222EC-ASR is limited to isolated 3.3 V or 5.0 V outputs. Its internal power switches (VSW) are rated for ≤5.5 V primary-side operation and lack external switch driver capability (ESW pin). Generating >5.5 V requires Si8842x or Si8862x variants with ESW/RSN pins and external FET support. Attempting 24 V output with SI88222EC-ASR would exceed internal switch voltage ratings and violate safe operating area limits - SI88222EC-ASR is strictly a low-voltage-input (3–5.5 V) to low-voltage-output device.
What transformer is recommended for SI88222EC-ASR in a 5 V input → 5 V output design?
The UMEC UTB02240s and Coilcraft TA7618-AL transformers are validated for SI88222EC-ASR in 4.5–5.5 V input to 3.0–5.5 V output configurations. Both meet required specs: 1:4 turns ratio, ≤100 nH leakage inductance, 2 µH ±5% primary inductance, and 5 kVRMS isolation. These are listed in Table 2 of the datasheet and referenced in AN892. SI88222EC-ASR relies on these specific magnetics for stable regulation and EMI compliance - substituting non-validated transformers may cause output instability or exceed CISPR 25 Class 5 emissions limits.
Is SI88222EC-ASR pin-compatible with other Si8822x variants?
SI88222EC-ASR shares the same SOIC-16 pinout as Si88220 and Si88221, but functional pin assignments differ. All three use identical pin 1–16 physical mapping (e.g., VDDA at pin 4, B1 at pin 9), but Si88220 has NC on pins 5/6 instead of GNDP/SH, and Si88221 repurposes pins 11/12 as HF RCVR/HF XMTR for reverse channel. Thus, SI88222EC-ASR is physically pin-compatible but not functionally drop-in - PCB layout must match its specific channel direction and DC-DC control pin usage. SI88222EC-ASR requires SH tied to GND for normal operation, unlike Si88220 which leaves that pin unconnected.
SI88222EC-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
SI88222EC-ASR FAQ
1.How can I place an order for SI88222EC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88222EC-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 SI88222EC-ASR reliable?
The price and inventory of SI88222EC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88222EC-ASR is usually 5 days.
3.What payment methods are accepted for SI88222EC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88222EC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88222EC-ASR?
SI88222EC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88222EC-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 SI88222EC-ASR?
For technical support, including SI88222EC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88222EC-ASR requirements.
6.How does Aetrix verify that SI88222EC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88222EC-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 SI88222EC-ASR meets industry standards.
7.What is the process for return or replacement of SI88222EC-ASR?
All SI88222EC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88222EC-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 SI88222EC-ASR part is unused and in its original packaging.
Return procedure for SI88222EC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88222EC-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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