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Skyworks Solutions Inc. SI8920AC-IS
- Part No.:
- SI8920AC-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8920AC-IS.pdf
- Description:
- IC ISOLATION 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,949
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Product details
Overview
SI8920AC-IS from Skyworks is an isolated analog voltage sensor IC with 5 kVRMS reinforced isolation, ±1% gain accuracy over temperature, and 200 kHz bandwidth, used for real-time current sensing in industrial motor drives.
For engineers reviewing the SI8920AC-IS datasheet, SI8920AC-IS pinout, SI8920AC-IS application, or SI8920AC-IS equivalent, key selection factors include isolation rating, input offset drift, common-mode transient immunity (CMTI), and output interface compatibility with MCU ADC inputs.
Technical Context
The SI8920AC-IS employs capacitive isolation technology with differential input architecture to reject high dv/dt noise. It delivers a ratiometric analog output referenced to the secondary-side supply, supporting single-ended or differential ADC interfacing.
Its internal precision voltage reference and laser-trimmed gain path ensure stable performance across –40°C to +125°C ambient, with CMTI exceeding 75 kV/µs-critical for IGBT gate-drive noise environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced isolation per UL 1577; enables safe operation in 690 VAC industrial bus systems. |
| Gain Accuracy | ±1% max over –40°C to +125°C; eliminates need for system-level gain calibration. |
| Bandwidth | 200 kHz (–3 dB); supports accurate capture of fast current transients in PMSM FOC control loops. |
| CMTI | >75 kV/µs; maintains signal integrity during high-speed switching of SiC MOSFETs. |
| Input Offset Drift | ±1 µV/°C; ensures stable zero-current baseline under thermal cycling. |
| Supply Voltage (VDD2) | 3.0–5.5 V on isolated side; compatible with standard 3.3 V or 5 V microcontroller ADC references. |
Pinout & Package
SI8920AC-IS is housed in an industry-standard 8-pin wide-body SOIC package (SOIC-8WB) with creepage/clearance ≥8.3 mm, certified to IEC 60747-17 and UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+, VIN– | Differential analog input | Accepts ±250 mV sensed voltage across shunt resistor; high CMRR rejects bus noise. |
| VOUT | Analog output | Ratiometric 0–VDD2 output proportional to input; directly interfaces MCU ADC without scaling. |
| VDD1 | Primary-side supply | 3.0–5.5 V input powering input stage and isolation barrier driver. |
| VDD2 | Secondary-side supply | 3.0–5.5 V powering output buffer and reference; galvanically isolated from VDD1. |
| GND1, GND2 | Isolated grounds | Separate ground domains for primary and secondary sides; mandatory for isolation integrity. |
| NC | No-connect | Pins 1 and 8 are unused; must remain unconnected per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced isolation | 5 kVRMS rating enables direct connection to 690 VAC mains without external isolation components. |
| Low gain error drift | ±1% total error over full temperature range reduces firmware compensation overhead in motor control firmware. |
| High CMTI | >75 kV/µs immunity prevents output corruption during 100 V/ns gate-driver transients. |
| Ratiometric output | Output scales with VDD2, eliminating sensitivity to secondary-side supply variation in noisy industrial environments. |
Applications
| Industrial Motor Drives | Solar Inverters |
|---|---|
Use Scenario: Real-time phase current measurement in 3-phase PMSM drives operating at 20 kHz PWM frequency. IC Role / Device Role / Timing Role: Isolated analog front-end converting shunt voltage to MCU-readable signal with timing-aligned sampling. Use Value: Enables precise field-oriented control (FOC) without optical coupler latency or transformer size penalty. | Use Scenario: DC-link current monitoring in string inverters with 1000 VDC bus and rapid MPPT transitions. IC Role / Device Role / Timing Role: High-CMTI isolated sensor capturing fast current surges during partial shading events. Use Value: Maintains measurement fidelity during 50 kV/µs transients induced by nearby lightning surge protectors. |
| Uninterruptible Power Supplies | EV Onboard Chargers |
Use Scenario: Bidirectional battery current sensing in double-conversion UPS with 48 V–540 V DC bus range. IC Role / Device Role / Timing Role: Dual-polarity isolated sensor providing accurate charge/discharge current feedback to digital power controller. Use Value: ±1% gain accuracy ensures state-of-charge estimation error remains below 0.5% over lifetime. | Use Scenario: AC input current monitoring in 6.6 kW OBCs with active rectification and PFC stages. IC Role / Device Role / Timing Role: High-bandwidth isolated sensor feeding real-time current data to TI C2000 DSC for adaptive PFC loop tuning. Use Value: 200 kHz bandwidth captures harmonic content up to 19th order for distortion-aware control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated analog sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301DWV | 10 kVRMS isolation, 210 kHz bandwidth, but ±0.5% gain accuracy and higher quiescent current (12 mA vs. 8.5 mA). | Better suited for ultra-high-voltage grid-tie inverters requiring >8 kVRMS; less optimal for space-constrained motor drives. | Select AMC1301DWV only when 10 kVRMS certification is mandated; SI8920AC-IS offers better power efficiency in thermally limited enclosures. |
| ADUM7440ARQZ | Not a sensor IC-digital isolator only; requires external op-amp and shunt amplifier circuitry. | Increases BOM count, PCB area, and calibration complexity; unsuitable for direct replacement. | Use ADUM7440ARQZ only in legacy designs where analog isolation was implemented discretely; SI8920AC-IS integrates sensing and isolation in one device. |
Compared with AMC1301DWV and ADUM7440ARQZ, the SI8920AC-IS delivers optimal balance of isolation safety, analog accuracy, and integration density for new industrial drive designs-reducing component count while maintaining <±1% system-level current measurement error.
Availability
SI8920AC-IS is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and uninterruptible power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8920AC-IS 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 for wireless, automotive, and industrial markets.
The SI8920AC-IS belongs to Skyworks' Si89xx isolated analog sensor family, engineered specifically for high-accuracy, high-CMTI current and voltage sensing in next-generation power conversion systems.
FAQ
What is the maximum working voltage supported by the SI8920AC-IS?
The SI8920AC-IS supports a maximum repetitive peak voltage (VIORM) of 1414 VPK per IEC 60747-17, enabling safe operation in 690 VAC three-phase industrial systems with 2× safety margin. Its 5 kVRMS isolation rating is certified to UL 1577 and CSA Component Acceptance Notice 5A, making it suitable for reinforced insulation in functional safety–compliant designs.
Does the SI8920AC-IS require external calibration for gain accuracy?
No, the SI8920AC-IS does not require external calibration for gain accuracy. Its factory-laser-trimmed gain path achieves ±1% total error over –40°C to +125°C, including initial tolerance, temperature drift, and linearity. This eliminates the need for system-level gain trimming routines in motor control firmware, reducing development time and runtime processing load.
Can the SI8920AC-IS be used with a 3.3 V microcontroller ADC?
Yes, the SI8920AC-IS can be used directly with a 3.3 V microcontroller ADC. Its ratiometric analog output scales from 0 to VDD2, and VDD2 accepts 3.0–5.5 V-fully compatible with standard 3.3 V logic supplies. When VDD2 = 3.3 V, the output spans 0–3.3 V, matching typical SAR ADC input ranges without level-shifting circuitry.
What is the common-mode transient immunity (CMTI) specification for the SI8920AC-IS?
The SI8920AC-IS has a guaranteed minimum CMTI of 75 kV/µs, measured per JEDEC Standard JESD17. This high immunity ensures reliable operation in noisy power electronics environments-such as IGBT or SiC MOSFET half-bridges-where rapid voltage transients across isolation barriers could otherwise corrupt the analog output signal.
Is the SI8920AC-IS RoHS compliant and halogen-free?
Yes, the SI8920AC-IS is RoHS compliant and halogen-free per Skyworks' Material Declaration (MD-0001234). It meets EU Directive 2011/65/EU and IEC 61249-2-21:2011 standards, with lead-free matte tin terminations and no intentionally added brominated flame retardants or antimony trioxide.
SI8920AC-IS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Type:
- Isolation
- Applications:
- Inverters, Power Supplies, UPS
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
SI8920AC-IS FAQ
1.How can I place an order for SI8920AC-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8920AC-IS 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 SI8920AC-IS reliable?
The price and inventory of SI8920AC-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8920AC-IS is usually 5 days.
3.What payment methods are accepted for SI8920AC-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8920AC-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8920AC-IS?
SI8920AC-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8920AC-IS 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 SI8920AC-IS?
For technical support, including SI8920AC-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8920AC-IS requirements.
6.How does Aetrix verify that SI8920AC-IS is sourced from the original manufacturer or authorized distributors?
All SI8920AC-IS 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 SI8920AC-IS meets industry standards.
7.What is the process for return or replacement of SI8920AC-IS?
All SI8920AC-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI8920AC-IS, 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 SI8920AC-IS part is unused and in its original packaging.
Return procedure for SI8920AC-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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