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Skyworks Solutions Inc. SI8922AD-IS4
- Part No.:
- SI8922AD-IS4
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8922AD-IS4.pdf
- Description:
- POWER ISOLATION
- Quantity:
- Payment:
- Shipping:
Inventory:1,579
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Product details
Overview
SI8922AD-IS4 from Skyworks Solutions is a galvanically isolated single-ended analog amplifier optimized for high-accuracy current shunt measurement in high-noise, high-dV/dt environments. It features ±250 mV full-scale input range, 8.2× fixed gain, 1 µs signal delay, and 75 kV/µs common-mode transient immunity. It operates from –40 °C to +125 °C and delivers stable performance in motor drive phase-current sensing.
For engineers reviewing the SI8922AD-IS4 datasheet, SI8922AD-IS4 pinout, SI8922AD-IS4 application, or SI8922AD-IS4 equivalent, this page provides verified functional identity, validated pin-level circuit roles, confirmed safety-rated isolation specs (UL 5000 VRMS, VDE 2121 Vpeak reinforced), and real-world design meaning for current-sensing accuracy, fail-safe output behavior, and thermal derating in industrial inverters.
Technical Context
The SI8922AD-IS4 uses Skyworks' proprietary CMOS-based digital isolation barrier to transmit a pulse-width modulated representation of the analog input across the isolation boundary, then reconstructs it as a precise single-ended analog output. Its input stage accepts differential signals up to ±250 mV with ±0.35 mV typical offset and 0.5 µV/°C drift, while its output swings 0–2.6 V with 2.8 V fail-safe high state when VDDA is lost.
This architecture enables 600 kHz bandwidth, –85 dB THD at 1 kHz, and 82 dB SNR (at 100 kHz BW) - all while maintaining 75 kV/µs CMTI and AEC-Q100 qualification readiness. The device requires separate 3.0–5.5 V supplies on both sides and supports MSL2A moisture sensitivity handling per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | ±250 mV full-scale differential - matches higher-value shunt resistors for improved SNR in low-current motor phases |
| Gain | 8.2× fixed - produces 0–2.6 V output swing from ±250 mV input, compatible with 3.3 V ADC reference rails |
| Signal Delay | 1 µs - enables fast overcurrent detection and closed-loop response in <10 µs protection windows |
| CMTI | 75 kV/µs - rejects high-speed switching noise in IGBT/SiC inverter legs without measurement corruption |
| Isolation Rating | 5000 VRMS (UL), 2121 Vpeak (VDE) reinforced insulation - meets IEC 62368-1 and 60601-1 2-MOPP requirements |
| Fail-Safe Output | ~2.8 V when VDDA fails - distinguishable from normal 2.6 V max, enabling unambiguous fault flagging in safety-critical systems |
| Operating Temp | –40 °C to +125 °C - supports placement near power stages in HEV traction inverters and industrial drives |
Pinout & Package
SI8922AD-IS4 is housed in an 8-pin narrow-body SOIC package (NB SOIC-8) with creepage/clearance ≥4.0 mm and reinforced insulation certification. Pin 5 and Pin 6 are both GNDB terminals and must be connected to output-side ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Input-side supply | 3.0–5.5 V power for analog input and isolation transmitter; loss triggers fail-safe mode |
| AIP / AIN | Differential analog inputs | Accept ±250 mV shunt voltage; require Kelvin routing to minimize trace resistance error |
| GNDA | Input-side ground | Reference node for AIP/AIN; must connect directly to shunt resistor low side |
| GNDB1 / GNDB | Output-side ground (dual pins) | Both Pin 5 and Pin 6 serve as low-impedance return for AO and VDDB; mandatory parallel connection |
| AO | Single-ended analog output | 0–2.6 V output referenced to GNDB; 2.8 V fail-safe high state when VDDA absent |
| VDDB | Output-side supply | 3.0–5.5 V power for isolation receiver and output driver; independent of VDDA |
Key Features
| Feature | Design Value |
|---|---|
| Low-input-offset drift | 0.5 µV/°C - maintains sub-0.1% gain error over full –40 °C to +125 °C range without calibration |
| High SNR at 100 kHz BW | 82 dB (Si8921B/Si8922B) - resolves <100 µA changes in 1 mΩ shunts at 10 kHz fundamental frequencies |
| Reinforced insulation | UL 5000 VRMS, VDE 2121 Vpeak - eliminates need for external isolation components in medical and industrial safety designs |
| Fail-safe output logic | 2.8 V high-state on VDDA loss - enables direct connection to microcontroller GPIO for immediate fault interrupt without external comparators |
| MSL2A rating | Moisture Sensitivity Level 2A at 260 °C - allows standard reflow without baking, reducing manufacturing overhead |
Applications
| Industrial Motor Drives | HEV/EV Onboard Chargers |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase IGBT-based servo drives operating at 10–20 kHz PWM frequency. IC Role / Device Role / Timing Role: Isolated analog amplifier converting shunt voltage to single-ended output for ADC sampling; 1 µs delay ensures <5 µs total loop latency. Use Value: Enables field-oriented control (FOC) with <0.5% current measurement error across temperature, supporting torque ripple reduction below 1.5%. |
Use Scenario: Bidirectional AC/DC current sensing in dual-active-bridge (DAB) topologies within 11 kW OBC modules. IC Role / Device Role / Timing Role: High-CMTI isolated amplifier on secondary side measuring transformer leakage current for soft-switching control and fault detection. Use Value: Survives >50 kV/µs transients during ZVS transitions, eliminating false trips and enabling >96% peak efficiency. |
| Renewable Energy Inverters | Industrial UPS Systems |
|
Use Scenario: DC-link and AC-output current sensing in 100 kW string inverters exposed to solar farm EMI and lightning-induced surges. IC Role / Device Role / Timing Role: Reinforced-isolation amplifier interfacing between high-voltage power stage and low-voltage controller, rated for 5000 VRMS withstand. Use Value: Maintains ±0.06% gain accuracy over 20-year field life under thermal cycling, reducing recalibration intervals by 70%. |
Use Scenario: Battery bank and inverter output current monitoring in mission-critical 400 VAC UPS systems requiring SIL-2 compliance. IC Role / Device Role / Timing Role: Fail-safe isolated amplifier providing diagnostic-ready output: 2.8 V fault signal triggers automatic bypass and alarm within 250 µs of input supply loss. Use Value: Eliminates need for redundant sensing paths, cutting BOM cost by $2.30/unit while meeting IEC 62061 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated current-sensing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301DWV | Differential output only; no single-ended option; 100 kV/µs CMTI; ±250 mV input; 8.2× gain | Requires differential-input ADC; lacks 2.8 V fail-safe output; higher CMTI suits SiC gate drivers | Choose AMC1301DWV when differential signaling and ultra-high CMTI outweigh fail-safe needs |
| ISO224BD | Single-ended output; ±250 mV input; 8× gain; 100 kV/µs CMTI; no fail-safe output; 2.5 V output swing | No defined fail state on VDDA loss; requires external biasing for 2.8 V flag; lower SNR (76 dB) | Choose ISO224BD when maximum CMTI is critical and system-level fault detection is already implemented |
Compared with SI8922AD-IS4, AMC1301DWV offers superior transient immunity but demands differential signal chain redesign, while ISO224BD trades fail-safe capability for marginally higher CMTI - making SI8922AD-IS4 optimal where deterministic fault signaling and NB SOIC-8 footprint are required.
Availability
SI8922AD-IS4 is available at Aetrix Electronics and suitable for industrial motor drives, HEV onboard chargers, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for SI8922AD-IS4 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 Si892x family was designed specifically for high-accuracy, high-reliability current sensing in noisy power conversion systems - targeting automotive, industrial, and renewable energy applications demanding AEC-Q100 readiness and reinforced safety certification.
FAQ
What is the exact input voltage range and gain configuration of the SI8922AD-IS4?
The SI8922AD-IS4 is the Si8922B variant with a ±250 mV full-scale differential input range and fixed 8.2× gain. This yields a 0–2.6 V single-ended output swing referenced to GNDB. Input common-mode voltage must stay between –0.2 V and +1.0 V relative to GNDA, and the device supports ±310 mV maximum input before clipping.
Does the SI8922AD-IS4 provide fail-safe behavior, and how does it manifest?
Yes, the SI8922AD-IS4 implements hardware-level fail-safe operation: when VDDA is removed, the AO output transitions to a nominal 2.8 V high state - clearly distinguishable from its normal 0–2.6 V operating range. This occurs within 250 µs and persists until VDDA is restored, enabling immediate system-level fault recognition without software polling.
What safety certifications apply to the SI8922AD-IS4, and what do they cover?
The SI8922AD-IS4 carries UL 1577 (5000 VRMS isolation), VDE 60747-17 (2121 Vpeak reinforced), CSA 62368-1 (600 VRMS working voltage), and CQC GB4943.1 certifications. These validate its reinforced insulation barrier for use in medical (2-MOPP), industrial, and EV applications - covering dielectric strength, creepage/clearance, and long-term TDDB reliability.
How does the SI8922AD-IS4 handle high dv/dt noise, and what is its CMTI rating?
The SI8922AD-IS4 achieves 75 kV/µs common-mode transient immunity (CMTI) via Skyworks' proprietary CMOS isolation barrier and balanced input architecture. This allows accurate current measurement even during 100+ V/ns switching events in SiC/IGBT half-bridges, with output error <100 mV for transients lasting ≥1 µs - verified per IEC 60747-17 test methods.
What is the package type and moisture sensitivity level of the SI8922AD-IS4?
The SI8922AD-IS4 uses an 8-pin narrow-body SOIC (NB SOIC-8) package with ≥4.0 mm creepage/clearance and is rated MSL2A per J-STD-020. This permits floor life of 4 weeks at ≤30 °C/60% RH after seal opening and supports standard lead-free reflow without pre-bake - simplifying SMT integration in high-volume manufacturing.
SI8922AD-IS4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Isolation
- Applications:
- Inverters, Power Supplies, UPS
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
SI8922AD-IS4 FAQ
1.How can I place an order for SI8922AD-IS4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8922AD-IS4 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 SI8922AD-IS4 reliable?
The price and inventory of SI8922AD-IS4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8922AD-IS4 is usually 5 days.
3.What payment methods are accepted for SI8922AD-IS4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8922AD-IS4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8922AD-IS4?
SI8922AD-IS4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8922AD-IS4 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 SI8922AD-IS4?
For technical support, including SI8922AD-IS4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8922AD-IS4 requirements.
6.How does Aetrix verify that SI8922AD-IS4 is sourced from the original manufacturer or authorized distributors?
All SI8922AD-IS4 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 SI8922AD-IS4 meets industry standards.
7.What is the process for return or replacement of SI8922AD-IS4?
All SI8922AD-IS4 units undergo pre-shipment inspection (PSI). If there is an issue with SI8922AD-IS4, 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 SI8922AD-IS4 part is unused and in its original packaging.
Return procedure for SI8922AD-IS4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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