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Skyworks Solutions Inc. SI88322BD-ASR
- Part No.:
- SI88322BD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88322BD-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
SI88322BD-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 isolation. It features two unidirectional high-speed channels (0–100 Mbps), 18 ns typical propagation delay, and operates from –40 °C to +125 °C. Used in motor control inverters and industrial PLCs where compact isolated power + signal integrity are critical.
For engineers reviewing the SI88322BD-ASR datasheet, SI88322BD-ASR pinout, SI88322BD-ASR application, or SI88322BD-ASR equivalent, this page delivers verified specifications, SOIC-20 wide-body package mapping, functional pin roles, automotive-grade AEC-Q100 qualification, and real-world design context for isolated gate drive and sensor interface systems.
Technical Context
The SI88322BD-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 flyback DC-DC controller supports low-voltage input (3–5.5 V) to isolated 3.3/5.0 V output, with external transformer, Schottky diode, and feedback resistor divider.
Key configurable functions include programmable switching frequency (200–800 kHz via SH_FC/SS pins), soft-start (capacitor-controlled), and shutdown (SH_FC high-active). The device uses peak-current-mode control with Type 1 compensation at COMP pin (RCOMP = 49.9 kΩ, CCOMP calculated per crossover frequency).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577, CSA 62368-1, VDE 62368-1 |
| Data Rate | 0 to 100 Mbps - supports high-speed serial interfaces including SPI, RS-485 transceiver control, and PWM feedback loops |
| Propagation Delay | 18 ns typical, 23 ns max - enables precise timing-critical applications like motor phase current sampling and gate driver synchronization |
| DC-DC Output Power | Up to 2 W average at 5.0 V - sufficient to power secondary-side MCU peripherals, ADCs, or isolated transceivers without external regulators |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports PPAP documentation and IMDS/CAMDS compliance for automotive OEM programs |
| Transient Immunity | 100 kV/µs typical - withstands fast-rising common-mode noise in high-di/dt motor drive and inverter circuits |
Pinout & Package
SI88322BD-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 | 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 supply, signal power, signal ground, and shutdown/frequency control - configure DC-DC operation and isolate primary logic domain |
| 7, 8, 9, 10 | A1, A2, B1, B2 | Two unidirectional digital channels: A1→B1 and A2→B2 - support forward data paths only; no bidirectional or reverse channel capability |
| 11, 12, 13, 14 | GNDB, VDDB, VSNS, COMP | Secondary-side ground, isolated signal power, feedback voltage sense, and loop compensation - enable closed-loop regulation and stable isolated power delivery |
| 15–20 | NC, NC, SS, NC, DNC/VREGB, NC | No-connect pins except SS (soft-start capacitor) and DNC/VREGB (Zener reference for >5.5 V outputs only - must be left open for 3.3/5.0 V use) |
Key Features
| Feature | Design Value |
|---|---|
| RF-based capacitive isolation | Eliminates optocoupler aging and temperature drift; achieves 100 Mbps with 18 ns prop delay and 100 kV/µs CMTI |
| Integrated flyback DC-DC controller | Reduces BOM by eliminating external controller IC; requires only transformer, Schottky diode, and 4 passive components for full 2 W isolated supply |
| Programmable soft-start & shutdown | Capacitor-timed SS pin prevents inrush current; SH_FC pin allows system-level power sequencing and fault recovery |
| Secondary-side voltage sensing | VSNS feedback eliminates optocoupler bias circuitry, improving line/load regulation and long-term reliability over opto-based solutions |
| AEC-Q100 automotive qualification | Validated for automotive subsystems including battery management, ADAS power domains, and EV traction inverter control boards |
Applications
| Industrial Motor Control | Automotive Inverter Gate Drive |
|---|---|
Use Scenario: Isolated PWM signal transmission and auxiliary 5 V supply for IGBT/SiC gate drivers in 3-phase inverters. IC Role / Device Role / Timing Role: Dual-channel isolator provides timing-aligned high-side/low-side gate signals; integrated DC-DC powers driver ICs and level-shifters. Use Value: Eliminates separate isolated DC-DC module, reduces PCB area by >30%, and maintains <23 ns channel-to-channel skew under EMI stress. |
Use Scenario: Signal isolation and local 3.3 V rail generation for MCU-controlled SiC half-bridge drivers in EV traction inverters. IC Role / Device Role / Timing Role: A1/B1 carries PWM enable; A2/B2 transmits fault feedback; DC-DC supplies isolated gate driver bias and current-sense amplifier. Use Value: Meets ASIL-B functional safety requirements via 5 kVRMS isolation and AEC-Q100 qualification; supports 125 °C junction operation. |
| PLC Digital I/O Module | Isolated Data Acquisition |
Use Scenario: Field-side digital input conditioning and isolated 5 V supply for opto-LED drivers and status LEDs in modular PLC backplanes. IC Role / Device Role / Timing Role: Provides galvanic separation between 24 V field bus and 3.3 V logic; DC-DC powers isolated level translators and LED sink drivers. Use Value: Replaces discrete isolator + regulator combo; achieves >8 mm creepage in SOIC-20 footprint, simplifying IEC 61000-4-5 surge compliance. |
Use Scenario: Isolating SPI clock/data lines and powering isolated ADC reference buffers in high-precision sensor front-ends. IC Role / Device Role / Timing Role: A1/B1 routes SCLK; A2/B2 carries MOSI/MISO; integrated DC-DC supplies low-noise 3.3 V for ADC analog section. Use Value: Maintains <1 LSB INL error under 10 kV ESD events due to 100 kV/µs CMTI; eliminates ground loop-induced offset drift. |
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 | Single 500 mW isolated 3.3 V output; 25 Mbps max data rate; SOIC-16 package; no frequency control or soft-start | Limited to low-power sensor interfaces; insufficient for gate driver bias or high-speed SPI | Select when only basic isolation + minimal power needed; avoid for motor control or >50 Mbps links |
| ISO7821FDWWR | No integrated DC-DC; requires external isolated power supply; 100 Mbps; 16-pin SOIC; 8000 VRMS isolation | Demands full external isolated supply design; higher board cost and layout complexity | Choose when highest isolation rating is mandatory and external DC-DC is already present |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88322BD-ASR uniquely combines 2 W isolated power, 100 Mbps dual channels, programmable frequency/soft-start, and AEC-Q100 qualification in one SOIC-20 package-enabling single-chip isolated subsystems in space-constrained automotive and industrial designs.
Availability
SI88322BD-ASR is available at Aetrix Electronics and suitable for industrial motor control, automotive inverter gate drive, and PLC digital I/O modules requiring stable component supply, long lifecycle assurance, and automotive-grade traceability.
Supply support for SI88322BD-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 wireless, automotive, and industrial markets.
The Si88x2x product line delivers integrated digital isolation + isolated DC-DC conversion for applications demanding compact, reliable, and certified galvanic separation-targeting EV powertrains, factory automation, and energy infrastructure.
FAQ
What is the maximum isolated output power supported by the SI88322BD-ASR?
The SI88322BD-ASR delivers up to 2 W average output power at 5.0 V on the isolated side. This is sufficient to power secondary-side gate drivers, ADCs, or isolated transceivers without external regulators. Peak power capability is not specified beyond this average rating, and sustained operation above 2 W requires thermal derating per the datasheet's junction temperature limits.
Does the SI88322BD-ASR support bidirectional communication on its isolation channels?
No, the SI88322BD-ASR provides two unidirectional digital channels: A1→B1 and A2→B2. Each channel transmits data in one direction only. Bidirectional protocols like I²C require external logic or a separate isolator pair; the SI88322BD-ASR itself does not implement automatic direction control or half-duplex arbitration.
Can the SI88322BD-ASR generate an isolated 24 V output?
No, the SI88322BD-ASR is configured for low-voltage input (3–5.5 V) to isolated 3.3 V or 5.0 V output only. Generating 24 V requires the Si8842x or Si8862x families, which support high-voltage configurations and external FET drivers. Attempting 24 V output with SI88322BD-ASR violates its internal architecture and safety certifications.
What is the function of the DNC/VREGB pin on the SI88322BD-ASR?
The DNC/VREGB pin is a Zener-referenced output intended only for use when the isolated DC-DC output exceeds 5.5 V. For standard 3.3 V or 5.0 V operation-as with SI88322BD-ASR-it must be left unconnected (DNC). Connecting it in low-voltage configurations risks improper regulation or damage, as confirmed in Table 1 of the datasheet.
How does the SI88322BD-ASR achieve AEC-Q100 qualification while maintaining industrial temperature range?
The SI88322BD-ASR achieves AEC-Q100 Grade 1 qualification (–40 °C to +125 °C) through automotive-specific manufacturing flows, extended reliability testing (HTOL, TC, UHAST), and process controls validated across wafer fabrication, assembly, and test. Its SOIC-20 wide-body package and internal design meet mechanical and thermal stress requirements defined in AEC-Q100 Rev G.
SI88322BD-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:
- 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:
- 20-SOIC
SI88322BD-ASR FAQ
1.How can I place an order for SI88322BD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88322BD-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 SI88322BD-ASR reliable?
The price and inventory of SI88322BD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88322BD-ASR is usually 5 days.
3.What payment methods are accepted for SI88322BD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88322BD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88322BD-ASR?
SI88322BD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88322BD-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 SI88322BD-ASR?
For technical support, including SI88322BD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88322BD-ASR requirements.
6.How does Aetrix verify that SI88322BD-ASR is sourced from the original manufacturer or authorized distributors?
All SI88322BD-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 SI88322BD-ASR meets industry standards.
7.What is the process for return or replacement of SI88322BD-ASR?
All SI88322BD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88322BD-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 SI88322BD-ASR part is unused and in its original packaging.
Return procedure for SI88322BD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88322BD-ASR Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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