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Skyworks Solutions Inc. SI8422AD-D-ISR
- Part No.:
- SI8422AD-D-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8422AD-D-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,902
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Product details
Overview
SI8422AD-D-ISR from Skyworks Solutions is a dual-channel, unidirectional digital isolator with 1-channel input on VDD1 side and 1-channel output on VDD2 side, rated for 5 kVRMS reinforced insulation, supporting up to 1 Mbps data rate with high-fail-safe default-high output state, used in isolated ADC interfaces and industrial PLC I/O modules.
For engineers reviewing the SI8422AD-D-ISR datasheet, SI8422AD-D-ISR pinout, SI8422AD-D-ISR application, or SI8422AD-D-ISR equivalent, key selection criteria include its 5 kVRMS isolation rating, SOIC-16 wide-body package, fail-safe high default output, –40 to 125 °C operation, and compatibility with 2.7–5.5 V dual supplies across isolated domains.
Technical Context
The SI8422AD-D-ISR implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without external components beyond 0.1 µF bypass capacitors per supply. Its Schmitt-trigger inputs provide hysteresis of 0.45 V typical, and UVLO thresholds (2.3 V typical) ensure reliable power-on reset behavior.
It features selectable fail-safe mode (default-high for this variant), precise timing with ≤11 ns max propagation delay and ≤0.5 ns channel-channel skew, and operates with <2.8 mA/channel at 1 Mbps (2.7 V supply) or <4.2 mA/channel (5 V supply), meeting AEC-Q100 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 1 Mbps - supports low-speed control signaling in isolated feedback loops and safety-critical status monitoring. |
| Isolation Rating | 5 kVRMS - enables reinforced insulation per IEC 60950-1/61010-1/60601-1 for medical and industrial end-equipment certification. |
| Supply Voltage | 2.7–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends across isolation barrier. |
| Propagation Delay | ≤11 ns max - ensures tight timing alignment in real-time control systems such as motor gate drivers and isolated PWM generators. |
| Fail-Safe Output | Default-high - guarantees known logic state during VDD1 loss, critical for fail-safe shutdown in power inverters and HV battery management. |
| Common-Mode Immunity | 45 kV/µs - maintains signal integrity in noisy environments like variable-frequency drives and switch-mode power supplies. |
| Operating Temp | –40 to 125 °C - supports deployment in under-hood automotive ECUs and industrial motor controllers without derating. |
Pinout & Package
SI8422AD-D-ISR is housed in a RoHS-compliant SOIC-16 wide-body package (WB SOIC-16), providing 8.3 mm creepage and clearance for 5 kVRMS reinforced insulation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to input-side logic and transmitter; requires 0.1 µF bypass capacitor to GND1. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier with ≥8.3 mm spacing. |
| IN1 | Input signal terminal | Accepts CMOS/TTL logic-level signals with Schmitt-trigger input (1.1–1.9 V thresholds) for noise immunity. |
| NC | No-connect | Internally unconnected; may be left floating, tied to VDD1, or tied to GND1 per layout requirements. |
| VDD2 | Output-side power supply | Supplies power to output-side logic and receiver; requires 0.1 µF bypass capacitor to GND2. |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1; defines secondary-side logic reference. |
| OUT1 | Output signal terminal | Drives 50 Ω nominal load; outputs high during VDD1 undervoltage (fail-safe high mode). |
| NC | No-connect | Internally unconnected; no electrical function; placement flexibility for routing or thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates startup initialization and provides superior magnetic field immunity vs. pulse-based schemes. |
| Selectably fail-safe output | Guarantees logic-high output when VDD1 is unpowered-critical for safe system shutdown sequences. |
| Ultra-low power at 1 Mbps | Draws <2.8 mA/channel at 2.7 V supply, reducing heat generation in densely packed isolated I/O modules. |
| Precise channel-to-channel timing | 0.5 ns max channel-channel skew enables synchronized sampling across dual isolated sensor channels. |
| AEC-Q100 qualified | Validated for automotive applications including battery disconnect units and onboard chargers. |
Applications
| Industrial PLC I/O Isolation | Isolated ADC Interface |
|---|---|
Use Scenario: Digital isolation of discrete input signals (e.g., limit switches, emergency stops) in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Transmits status signals across 5 kVRMS barrier while maintaining <11 ns propagation delay for deterministic scan-cycle timing. Use Value: Enables SIL-2/3 compliance via reinforced insulation and fail-safe high output during input-side power loss. | Use Scenario: Isolating serial interface (SPI/I²C) between precision ADC and host MCU in high-voltage energy metering systems. IC Role / Device Role / Timing Role: Provides bidirectional clock/data isolation with <0.5 ns channel skew to preserve sampling phase accuracy. Use Value: Maintains 16-bit effective resolution by preventing ground-loop noise coupling into analog measurement paths. |
| Automotive Battery Management | Isolated Switch-Mode Supply Feedback |
Use Scenario: Monitoring cell voltage supervisor alerts and contactor control signals in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Delivers fail-safe high output during main battery disconnect to trigger redundant safety shutdown logic. Use Value: Meets ASIL-B requirements through AEC-Q100 qualification and guaranteed output state under fault conditions. | Use Scenario: Transmitting error amplifier output from secondary-side TL431 to primary-side PWM controller in isolated flyback converters. IC Role / Device Role / Timing Role: Replaces optocoupler with <11 ns delay and 45 kV/µs CMTI for stable regulation under fast load transients. Use Value: Improves transient response and reduces compensation complexity versus legacy opto-based feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM120N0BRZ-RL7 | Single-channel, 150 Mbps, 3.75 kVRMS, default-low fail-safe, SOIC-8 narrow body | Lacks reinforced 5 kVRMS rating; unsuitable for medical/industrial safety-critical isolation barriers | Choose only if lower isolation rating and smaller footprint are acceptable and fail-safe low aligns with system logic. |
| ISO7721DWR | Dual-channel, 100 Mbps, 5 kVRMS, default-low fail-safe, SOIC-8 wide body | SOIC-8 package offers less creepage than SOIC-16; default-low output conflicts with SI8422AD-D-ISR's high-default requirement | Select when board space is constrained and system design accommodates low-default behavior during input-side power loss. |
Compared with ADUM120N0BRZ-RL7 and ISO7721DWR, SI8422AD-D-ISR uniquely delivers 5 kVRMS reinforced insulation in SOIC-16 with guaranteed high-default output-making it the only option among the three qualified for medical-grade isolated ADC interfaces requiring fail-safe high assertion.
Availability
SI8422AD-D-ISR is available at Aetrix Electronics and suitable for industrial automation systems, medical electronics, and hybrid electric vehicles requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SI8422AD-D-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.
The Si84xx family was designed specifically for high-reliability, low-power digital isolation in safety-critical systems-including industrial control, medical instrumentation, and automotive electrification-where reinforced insulation and fail-safe behavior are mandatory.
FAQ
What is the isolation rating and safety certification status of SI8422AD-D-ISR?
The SI8422AD-D-ISR is rated for 5 kVRMS reinforced insulation and certified to UL 1577, CSA Component Notice 5A, VDE IEC 60747-5-5, and IEC 60950-1/61010-1/60601-1 standards. These certifications validate its suitability for medical, industrial, and automotive applications requiring double or reinforced insulation barriers. SI8422AD-D-ISR meets all required creepage and clearance distances in its SOIC-16 wide-body package.
Does SI8422AD-D-ISR require external components for basic operation?
Yes-SI8422AD-D-ISR requires a 0.1 µF ceramic bypass capacitor between VDD1 and GND1, and another between VDD2 and GND2, placed as close as possible to the pins. No pull-up/down resistors or initialization firmware are needed. The device powers up with fail-safe high output and begins passing data immediately after UVLO release (~40 µs startup time).
What is the maximum data rate supported by SI8422AD-D-ISR, and how does it compare to other variants in the Si8422 family?
SI8422AD-D-ISR supports up to 1 Mbps, as indicated by the "A" suffix in its ordering code (per Table 2.1). This contrasts with SI8422BD-D-ISR ("B" = 150 Mbps). Both share identical pinout, package, and fail-safe configuration-but SI8422AD-D-ISR is optimized for ultra-low power at lower speeds (<2.8 mA/channel at 1 Mbps, 2.7 V), making it ideal for battery-backed or thermally constrained systems.
How does the fail-safe high output behavior of SI8422AD-D-ISR function during power loss?
When VDD1 drops below UVLO threshold (2.3 V typical), SI8422AD-D-ISR forces OUT1 high regardless of IN1 state-ensuring a known, safe output during input-side brownout or disconnection. This behavior is hardwired per ordering option and does not require configuration. VDD2 must remain powered for the output to assert; if both supplies fail, output becomes undetermined.
Is SI8422AD-D-ISR compatible with 2.7 V logic systems on both sides of the isolation barrier?
Yes-SI8422AD-D-ISR operates across 2.7–5.5 V on both VDD1 and VDD2 supplies independently. At 2.7 V, it draws <2.8 mA/channel at 1 Mbps and maintains full timing specs (≤11 ns propagation delay, ≤0.5 ns skew). Input thresholds (1.1–1.9 V) and output drive (VOH ≥2.3 V, VOL ≤0.4 V) are fully compatible with 2.7 V CMOS logic families.
SI8422AD-D-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:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 25ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8422AD-D-ISR FAQ
1.How can I place an order for SI8422AD-D-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8422AD-D-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 SI8422AD-D-ISR reliable?
The price and inventory of SI8422AD-D-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8422AD-D-ISR is usually 5 days.
3.What payment methods are accepted for SI8422AD-D-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8422AD-D-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8422AD-D-ISR?
SI8422AD-D-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8422AD-D-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 SI8422AD-D-ISR?
For technical support, including SI8422AD-D-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8422AD-D-ISR requirements.
6.How does Aetrix verify that SI8422AD-D-ISR is sourced from the original manufacturer or authorized distributors?
All SI8422AD-D-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 SI8422AD-D-ISR meets industry standards.
7.What is the process for return or replacement of SI8422AD-D-ISR?
All SI8422AD-D-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8422AD-D-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 SI8422AD-D-ISR part is unused and in its original packaging.
Return procedure for SI8422AD-D-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8422AD-D-ISR 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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