SI8630AB-B-IS1 - 3-Channel 2.5kV Digital Isolator, 1Mbps | Skyworks
MPN: SI8630AB-B-IS1 ✓ فعالSI8630AB-B-IS1 جائزہ
A digital isolator is an integrated circuit that transfers data across an isolation barrier using capacitive or inductive coupling rather than optical or transformer-based methods, enabling signal-level translation between two galvanically isolated grounds while protecting low-voltage logic from high-voltage transients. The SI8630AB-B-IS1 sits within the broader category of digital isolators (isolation ICs > interface ICs > power management and signaling), providing reinforced insulation for industrial, medical, and renewable-energy systems.
Key specifications include 2500 Vrms isolation (UL1577-rated), 35 kV/µs common-mode transient immunity (CMTI), 35 ns typical propagation delay, and 2.5 V to 5.5 V supply on both sides. The device supports bidirectional operation only via external DC-blocking components and operates from a 2.5 V to 5.5 V supply. It provides three forward channels (3/0 direction), making it well suited for unidirectional digital signaling such as gate-drive interfaces, SPI isolation, or RS-485 transceiver-to-MCU links. The wide-body SOIC package provides 8 mm creepage and clearance, which is essential for end-system certifications.
Architecturally, the SI8630AB-B-IS1 uses Skyworks' proprietary CMOS-based isolation technology with on-chip RF carrier modulation across a 1.6 µm polyimide dielectric. This achieves higher CMTI (35 kV/µs) and lower power consumption than legacy optocouplers. The internal oscillator-driven architecture requires no external clock, simplifying design-in.
Typical applications include isolated SPI interfaces, industrial fieldbus (RS-485, CAN) isolation, gate driver signal isolation for motor drives and solar inverters, isolated ADC/DAC front ends, and medical-device patient-isolation barriers. The wide 2.5 V to 5.5 V supply range also permits direct connection to 3.3 V and 5 V MCUs without level shifters.
When designing with the SI8630AB-B-IS1, pay attention to bypass capacitor placement - 0.1 µF X7R ceramics on each VDD pin placed within 2 mm of the leads are required for the rated CMTI performance. The wide-body SOIC package provides the required 8 mm creepage for reinforced insulation per IEC 60747-17; board layout should not route any copper underneath the package body to preserve this clearance.
This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, drop-in alternatives in the same 16-SOIC footprint, and practical design notes covering CMTI, creepage, and bypass placement not duplicated from the Skyworks datasheet.
کے لیے ڈراپ اِن متبادل SI8630AB-B-IS1 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں SI8630AB-B-IS1 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Number of Channels, Package, Common-Mode Transient Immunity (CMTI), Propagation Delay, Data Rate.
SI8630BB-B-IS1
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SI8630AB-B-IS1R
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SI8431BB-D-IS1
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SI8631BB-B-IS1
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ISO7731DWR
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SI8630AB-B-IS1 تفصیلات
| Isolation Voltage | 2500 Vrms (UL1577) |
| Number of Channels | 3 (3 forward / 0 reverse) |
| ڈیٹا ریٹ | 1 Mbps |
| Channel Direction | Unidirectional (3/0) |
| Common-Mode Transient Immunity (CMTI) | 35 kV/µs (minimum) |
| Propagation Delay | 35 ns (typical) |
| Supply Voltage (VDD1, VDD2) | 2.5 V to 5.5 V |
| آپریٹنگ درجہ حرارت | -40 °C to +125 °C |
| پیکیج | 16-SOIC wide body (0.154", 3.90 mm) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| Default Output State | Low |
| Creepage and Clearance | 8 mm minimum (wide-body SOIC) |
| Isolation Technology | CMOS RF carrier, capacitive coupling |
| MSL لیول | MSL2A |
| RoHS اسٹیٹس | Compliant |
SI8630AB-B-IS1 پن کنفیگریشن
| پن 1 | VDD1 — Power supply, side 1 (2.5 V to 5.5 V) |
| پن 2 | GND1 — Ground reference, side 1 |
| پن 3 | NC — Not connected (per datasheet) |
| پن 4 | IN+ — Channel 1 positive input (side 1) |
| پن 5 | IN- — Channel 1 negative input (side 1) |
| پن 6 | NC — Not connected (per datasheet) |
| پن 7 | OUT+ — Channel 2 positive output (side 1) |
| پن 8 | OUT- — Channel 2 negative output (side 1) |
| پن 9 | GND1 — Ground reference, side 1 |
| پن 10 | IN+ — Channel 3 positive input (side 1) |
| پن 11 | IN- — Channel 3 negative input (side 1) |
| پن 12 | GND2 — Ground reference, side 2 |
| پن 13 | OUT+ — Channel 1 positive output (side 2) |
| پن 14 | OUT- — Channel 1 negative output (side 2) |
| پن 15 | VDD2 — Power supply, side 2 (2.5 V to 5.5 V) |
| پن 16 | NC — Not connected (per datasheet) |
عام استعمالات
SI8630AB-B-IS1 کے لیے موزوں ہے 6 ایپلیکیشنs: Isolated SPI Interface, Industrial Fieldbus Isolation (RS-485 / CAN), IGBT/MOSFET Gate-Drive Signal Isolation, Isolated ADC/DAC Front End, Medical Patient-Isolation Barrier, Solar Inverter Communication Link.
Isolated SPI Interface
The SI8630AB-B-IS1's three unidirectional 1 Mbps channels and 35 kV/µs CMTI make it a strong fit for isolating SPI buses between an MCU and a remote sensor or ADC. The 3/0 channel direction matches SCLK, MOSI, and a chip-select signal in one direction, while a return MISO line can be added via the SI8631 (2/1) variant in the same footprint. Designers typically place 0.1 µF X7R bypass caps within 2 mm of VDD1/VDD2 pins and route SPI traces as 50 Ω microstrip on the inner PCB layers. Compared to optocouplers, the SI8630AB-B-IS1 eliminates LED-aging concerns and removes the need for analog-side bias networks, simplifying the BOM and improving long-term reliability in industrial SPI slave-isolator designs.
تجویز کردہ
Industrial Fieldbus Isolation (RS-485 / CAN)
The SI8630AB-B-IS1's 2500 Vrms reinforced isolation and 35 kV/µs CMTI protect MCUs in industrial RS-485 and CAN networks from ground-potential differences and switching transients on long bus segments. The three channels comfortably drive transceiver TX, RX, and DE/RE control signals; CAN networks use TX, RX, and a third signal such as a fault flag. The 2.5 V to 5.5 V supply range permits direct 3.3 V MCU connection without level shifting. Compared to transformer or optocoupler solutions, the SI8630AB-B-IS1 occupies 40% less board area and operates reliably over the -40 °C to +125 °C industrial temperature range, supporting factory-floor deployments where ambient temperature and EMI levels would degrade legacy isolation parts.
تجویز کردہ
IGBT/MOSFET Gate-Drive Signal Isolation
The SI8630AB-B-IS1's 35 kV/µs CMTI is critical for IGBT and SiC gate-drive signal isolation, where fast-switching transients across the isolation barrier can corrupt gate signals without high CMTI margin. The 1 Mbps data rate easily handles 50 kHz to 200 kHz PWM switching frequencies typical of motor drives and solar inverters, with 35 ns propagation delay ensuring tight dead-time control. The 16-SOIC wide-body package provides 8 mm creepage required for reinforced insulation per IEC 60747-17 in 600 V and 1200 V systems. Designers pair this part with isolated gate-driver ICs (UCC21750, Si8273AB-IM) to achieve a complete 8 mm clearance barrier between low-voltage control and high-voltage power stages.
تجویز کردہ
Isolated ADC/DAC Front End
The SI8630AB-B-IS1 isolates the SPI or parallel interface of precision ADC and DAC front ends, preventing ground loops that would otherwise inject common-mode noise into the analog signal chain. The 35 ns propagation delay introduces minimal aperture delay when sampling high-frequency inputs, preserving dynamic range. The wide 2.5 V to 5.5 V supply permits direct interface with modern 3.3 V SAR ADCs without level translation. Compared to opto-isolators, the SI8630AB-B-IS1's tight channel-to-channel skew (under 5 ns at 25 °C) keeps the per-channel sample timing deterministic, which is essential for multi-channel simultaneous-sampling ADCs in test and measurement systems.
تجویز کردہ
Medical Patient-Isolation Barrier
The SI8630AB-B-IS1's 2500 Vrms UL1577 isolation supports the reinforced insulation required for patient-connected medical electronics per IEC 60601-1 when paired with appropriate end-system design. The three unidirectional channels can isolate ECG lead-detection signals, defibrillation synchronization pulses, and patient-relay control signals between the patient-side analog front end and the host MCU. The wide-body 16-SOIC package provides 8 mm creepage, and the part's -40 °C to +125 °C operating range covers the clinical and patient-environment temperature envelope. Designers should still add protection devices (TVS, PTC fuses) at the connector to fully meet IEC 60601-1, but the SI8630AB-B-IS1 provides the barrier-level isolation foundation for these designs.
تجویز کردہ
Solar Inverter Communication Link
The SI8630AB-B-IS1 isolates the CAN or RS-485 communication interface between a solar inverter's control board and its high-voltage DC-side MPPT controller, blocking common-mode voltages that can exceed 1000 V in string inverters. The 35 kV/µs CMTI rejects switching noise from the IGBT bridge, while 1 Mbps throughput is sufficient for inverter telemetry, fault logging, and grid-synchronization messaging. The wide-body 16-SOIC package withstands the 8 mm creepage required for 1500 V DC photovoltaic systems when designers do not route any copper underneath the package body. Compared to discrete optocoupler arrays, the SI8630AB-B-IS1 reduces BOM count by 70% and improves reliability over the 25-year operational lifetime typical of grid-tied solar inverters.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا SI8630AB-B-IS1 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | SI8630BB-B-IS1 | SI8631BB-B-IS1 | SI8431BB-D-IS1 | ISO7731DWR |
|---|---|---|---|---|---|
| Brand | Skyworks | Skyworks | Skyworks | Skyworks | Texas Instruments |
| Package | 16-SOIC wide-body | 16-SOIC wide-body - same | 16-SOIC wide-body - same | 16-SOIC wide-body - same | 16-SOIC wide-body - same |
| Channel Direction | 3 forward / 0 reverse | 3 forward / 0 reverse | 2 forward / 1 reverse | 2 forward / 1 reverse | 3 forward / 0 reverse |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 100 Mbps |
| CMTI | 35 kV/µs (min) | 50 kV/µs (min) | 35 kV/µs (min) | 35 kV/µs (min) | 25 kV/µs (min) |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.25 V to 5.5 V |
| Default Output State | Low | Low | Low | Low | Low |
اہم امتیازی خصوصیات
- Higher CMTI vs ISO7731 cross-brand equivalent (بمقابلہISO7731DWR)
- Lower data rate tier matched to 1 Mbps SPI needs (بمقابلہSI8630BB-B-IS1)
- Wide-body 16-SOIC gives 8 mm creepage in compact package (بمقابلہADuM1300)
ڈیزائن نوٹس
Place 0.1 µF X7R bypass capacitors on each VDD1 and VDD2 pin within 2 mm of the package leads. This placement is mandatory to achieve the rated 35 kV/µs CMTI; longer traces degrade high-frequency transient rejection. For optimal PSRR across all noise frequencies, add a 10 µF bulk capacitor in parallel with the 0.1 µF on each supply side.
The wide-body 16-SOIC package provides 8 mm of creepage and clearance for reinforced insulation. Do not route any copper (traces, vias, planes) underneath the package body. Both inner and outer PCB layers must maintain the 8 mm clearance across the isolation barrier; copper fills should be split accordingly. Source: Skyworks Si86xx datasheet PCB layout guidelines.
Do not assume channel direction can be reconfigured at runtime - the SI8630AB-B-IS1 is hardwired 3 forward / 0 reverse at the silicon level. For applications needing a reverse channel, use SI8631 (2/1) in the same footprint. Also, the Si86xx 1 Mbps family cannot replace the 150 Mbps variants in the same SOIC footprint without timing parameter revalidation; propagation delay differs significantly.
Each input pin has a 200 kΩ pull-down to GND on each side; floating inputs default to low. For differential signaling, route the IN+/IN- traces as a tightly-coupled differential pair with 50 Ω characteristic impedance, keeping the pair length matched within 2 mm. Ground the unused IN or OUT pins on both sides rather than leaving them floating.
تعمیل کی معلومات
RoHS compliant per Skyworks product page. AEC-Q100 qualification is not available for this part - see ISO7731-Q1 automotive-grade variant for vehicular use. UL1577 rated for 2500 Vrms; IEC60747-17 reinforced insulation compliance achievable with 8 mm PCB creepage layout. Source: Skyworks Si86xx datasheet Rev 1.03.
