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Skyworks Solutions Inc. SI88422EC-ISR
- Part No.:
- SI88422EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88422EC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,586
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Product details
Overview
SI88422EC-ISR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, designed for high-voltage-to-low-voltage conversion (e.g., 24 V input to 3.3/5 V isolated output), supporting up to 2 W average output power, 5000 VRMS isolation, and 100 Mbps data rate. It operates across –40 °C to +125 °C and is AEC-Q100 qualified for automotive use.
For engineers reviewing the SI88422EC-ISR datasheet, SI88422EC-ISR pinout, SI88422EC-ISR application, or SI88422EC-ISR equivalent, this page delivers verified specifications, SOIC-16 wide-body package details, transformer-coupled flyback DC-DC architecture, and validated alternatives for industrial motor control, EV battery management, and isolated PLC I/O designs.
Technical Context
The SI88422EC-ISR implements two unidirectional RF-based digital isolation channels using capacitive silicon dioxide barriers, with on/off keying modulation for superior noise immunity and 18 ns typical propagation delay. Its isolated DC-DC converter uses an external NMOS switch driven by ESW and current sensing via RSN, enabling high-side primary operation up to 24 V.
This variant belongs to the Si884xx family optimized for high-voltage-to-low-voltage configurations: it lacks SH/SH_FC shutdown and SS soft-start pins (not present in Si884xx), uses fixed 250 kHz switching frequency, and requires external loop compensation with RCOMP = 100 kΩ at the COMP pin for peak-current-mode control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for one minute - meets reinforced insulation requirements 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 transceiver control, and real-time sensor feedback. |
| Propagation Delay | 18 ns typical, 23 ns max - enables precise timing-critical applications such as gate driver signaling and encoder synchronization. |
| DC-DC Output Power | 2 W average at 5 V - sufficient to power secondary-side microcontrollers, ADCs, and isolated transceivers without external regulators. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive, industrial inverters, and harsh-environment motor drives. |
| Transient Immunity | 100 kV/µs (typical) - ensures robust operation in noisy EMI environments like variable-frequency drives and welding equipment. |
| Regulatory Certifications | UL 1577, CSA 62368-1, VDE 62368-1, CQC GB4943.1, AEC-Q100 Grade 1 - supports safety-critical automotive and industrial certifications. |
Pinout & Package
SI88422EC-ISR 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, rated for 5000 VRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | HF XMTR / HF RCVR / GNDP / RSN / ESW / VDDA | Primary-side RF transmitter/receiver pairs, power ground, current sense input, external switch driver, and signal supply - enable 24 V primary-side interface with external FET control. |
| 7, 8, 9, 10 | A1, A2, B1, B2 | Two bidirectional digital isolation channel I/Os - A1/A2 on primary side, B1/B2 on secondary side; support CMOS logic levels and fail-safe default states. |
| 11, 12, 13, 14, 15, 16 | VREGA, GNDA, GNDB, VDDB, VSNS, COMP | Voltage reference for primary-side regulator, primary/secondary grounds, secondary-side supply, feedback sense, and compensation node - configure closed-loop regulation with external R/C network (RCOMP = 100 kΩ). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated flyback DC-DC controller with external FET drive | Enables 24 V primary input conversion to isolated 3.3/5 V outputs while avoiding internal switch limitations and thermal derating. |
| Secondary-side voltage sensing via VSNS pin | Eliminates optocouplers and bias circuitry, delivering ±1% load regulation and superior line regulation over temperature and input variation. |
| Capacitive RF isolation with on/off keying | Provides 100 kV/µs common-mode transient immunity and immunity to magnetic fields - critical for motor phase-leg and inverter gate-drive isolation. |
| Thermal shutdown and cycle-skipping at light loads | Protects against junction overheating during overload; reduces switching losses in standby mode without compromising regulation stability. |
| AEC-Q100 Grade 1 qualification and automotive PPAP support | Validates reliability for automotive powertrain and battery management systems, including IMDS/CAMDS compliance and AIAG-aligned documentation. |
Applications
| Industrial Motor Control | EV Battery Management Systems |
|---|---|
|
Use Scenario: Isolating gate-driver signals and current-sense feedback in 3-phase inverter stacks driving traction motors. IC Role / Device Role / Timing Role: Dual-channel isolator provides independent high-side/low-side PWM signal transfer and analog front-end isolation; DC-DC powers isolated ADC and MCU peripherals. Use Value: Enables compact, thermally efficient inverter design with 18 ns prop delay minimizing shoot-through risk and 5000 VRMS isolation meeting IEC 61800-5-1 requirements. |
Use Scenario: Monitoring cell voltages and temperatures across 96-cell EV battery packs with centralized BMS controller. IC Role / Device Role / Timing Role: Provides galvanic isolation between high-voltage battery string domains and low-voltage BMS logic; DC-DC supplies isolated CAN transceivers and precision ADCs. Use Value: Supports daisy-chained monitoring with <23 ns channel-to-channel skew, withstands 100 kV/µs transients from contactor switching, and operates reliably at 125 °C ambient. |
| Programmable Logic Controller I/O Modules | Isolated Industrial Ethernet Gateways |
|
Use Scenario: Digitally isolating discrete input/output signals in modular PLC backplanes with field-side 24 V DC power. IC Role / Device Role / Timing Role: Transfers status and command signals across isolation barrier; integrated DC-DC powers field-side sensors, solenoids, and opto-LED drivers. Use Value: Reduces BOM count by eliminating separate isolated power supplies; SOIC-16 footprint simplifies layout and meets IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Isolating Ethernet PHY interface and MCU communication lines in industrial gateways connecting Modbus RTU networks to cloud platforms. IC Role / Device Role / Timing Role: Isolates MDIO/MII control lines and power domain boundaries; DC-DC supplies isolated Ethernet magnetics bias and PHY VDDIO. Use Value: Achieves 100 Mbps link speed with sub-25 ns jitter accumulation; reinforced insulation prevents ground-loop noise coupling into sensitive 10/100BASE-TX signaling. |
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 |
|---|---|---|---|
| ADUM6420ARWZ | 4-channel isolator + integrated 500 mW DC-DC; uses iCoupler® transformer isolation; no external FET drive capability. | Better suited for low-power logic-level isolation where >500 mW secondary power is not required; lacks RSN/ESW for high-voltage primary control. | Select ADUM6420ARWZ when board space is constrained and secondary load ≤500 mW; avoid for 24 V primary or >2 W output needs. |
| ISO7842FDWR | Dual-channel digital isolator only - no integrated DC-DC; requires external isolated power supply (e.g., transformer + regulator). | Used where system already includes isolated power rails or where DC-DC integration adds unnecessary complexity or thermal load. | Select ISO7842FDWR when designing with existing isolated 3.3/5 V supplies or when strict EMI budgets prohibit on-chip switching converters. |
Compared with ADUM6420ARWZ and ISO7842FDWR, SI88422EC-ISR uniquely combines 24 V-compatible external-FET DC-DC control, 2 W output capability, and AEC-Q100 qualification - making it the only option among the three suitable for automotive-grade high-voltage motor control and battery monitoring.
Availability
SI88422EC-ISR is available at Aetrix Electronics and suitable for industrial motor control, EV battery management systems, and programmable logic controller I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for SI88422EC-ISR 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 Si88xx family was developed to replace optocouplers and discrete isolation + DC-DC combinations in high-reliability, high-noise environments - targeting automotive powertrain, industrial automation, and energy infrastructure applications.
FAQ
What is the maximum input voltage supported by SI88422EC-ISR's DC-DC converter?
The SI88422EC-ISR is designed for high-voltage-to-low-voltage configurations and supports up to 24 V DC on the primary side via its external FET driver (ESW) and current sense (RSN) pins. It does not integrate internal power switches, enabling safe operation at elevated input voltages beyond 5.5 V - unlike Si882xx/3xx variants. SI88422EC-ISR requires an external NMOS transistor and shunt resistor for primary-side switching and sensing.
Does SI88422EC-ISR include shutdown or soft-start functionality?
No, SI88422EC-ISR does not provide pin-controlled shutdown (SH/SH_FC) or soft-start (SS) features - these are explicitly excluded from the Si884xx family per the datasheet. The device relies on fixed 250 kHz switching frequency and internal UVLO thresholds for startup control. SI88422EC-ISR achieves safe turn-on via undervoltage lockout on both VDDA and VDDB rails, with tSU timing ensuring outputs remain low until valid supply conditions are met.
What transformer specifications are validated for use with SI88422EC-ISR?
Skyworks validates transformers for SI88422EC-ISR in high-voltage input configurations: e.g., UMEC UTB02250s (7–24 V input, 3.3–5.5 V output, 3.0:1 turns ratio, 5 kVRMS isolation) and Coilcraft TA7788-AL (12 V input, 5/15 V output, multi-winding, 5 kVRMS). All validated parts meet leakage inductance ≤600 nH, primary inductance ≥25 µH, and isolation ≥5 kVRMS - critical for stable regulation and safety compliance in SI88422EC-ISR designs.
How is loop compensation configured for SI88422EC-ISR's DC-DC converter?
SI88422EC-ISR requires Type 1 loop compensation at the COMP pin using a series RC network: RCOMP = 100 kΩ (fixed to match internal resistance) and CCOMP calculated per fC = crossover frequency. The compensation network connects between COMP and GNDB. Unlike Si882xx/3xx (49.9 kΩ), SI88422EC-ISR's higher RCOMP value ensures stable closed-loop control with external FET topologies and wider input voltage ranges.
Is SI88422EC-ISR compatible with AEC-Q100 Grade 0 or Grade 1?
SI88422EC-ISR is qualified to AEC-Q100 Grade 1, specifying operation from –40 °C to +125 °C ambient temperature - suitable for engine compartment and powertrain applications. It is not rated for Grade 0 (–40 °C to +150 °C). The qualification includes stress testing for HTOL, TC, UHAST, and ESD per AEC-Q100 Rev H, with full PPAP documentation and IMDS/CAMDS support available for automotive customers.
SI88422EC-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SI88422EC-ISR FAQ
1.How can I place an order for SI88422EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88422EC-ISR 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 SI88422EC-ISR reliable?
The price and inventory of SI88422EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88422EC-ISR is usually 5 days.
3.What payment methods are accepted for SI88422EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88422EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88422EC-ISR?
SI88422EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88422EC-ISR 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 SI88422EC-ISR?
For technical support, including SI88422EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88422EC-ISR requirements.
6.How does Aetrix verify that SI88422EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88422EC-ISR 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 SI88422EC-ISR meets industry standards.
7.What is the process for return or replacement of SI88422EC-ISR?
All SI88422EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88422EC-ISR, 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 SI88422EC-ISR part is unused and in its original packaging.
Return procedure for SI88422EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88422EC-ISR Tags
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