Isolation Solutions
Superior isolation that enhances system performance, flexibility, and reliability, while reducing cost and size.
We’re experts in high voltage and superior isolation. With more than 300 million isolation channels in field service, our isolation portfolio is used by a wide range of customers and applications, including industrial automation, transportation systems, home entertainment electronics, and medical systems. Our products support isolation voltages up to 5 kV and include digital isolators, isolated gate drivers, isolated analog and ADC, industrial I/O, and isolated FET families.
Find out how our isolation products help keep people healthy and safe during the COVID-19 pandemic.
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| Common Applications | Communication buses | Power supplies, solar and motor inverters, on-board chargers | Load monitoring | Automation, programmable logic controllers | Relay Replacement |
| Number of channels | 1 to 6 | 1, 2 | 1,3 | 4, 8 | 1 |
| Configuration | Multi-channel | Single, dual independent or high-side/low-side | Single or multi-channel | Multi-channel | Single channel |
| Isolation ratings | 1.0, 2.5, 3.75 or 5.0 kVrms | 1.0, 2.5, 3.75 or 5.0 kVrms | 2.5 or 5.0 kVrms | 1.5 or 2.5 kVrms | 2.5 kVrms |
| Input type | Digital (CMOS) or LED emulator | Digital (CMOS) or LED emulator | Analog single ended or differential | Digital (CMOS) or LED emulator | Digital (CMOS) or LED emulator |
| Output type | Digital push-pull, Open drain | High current push-pull (Up to 4.0 A peak switching) | Analog or Digital (SPI, UART, I2C, Delta-Sigma bit stream) | Digital push-pull, High current open drain (0.7 A continuous) | Digital push-pull |
| SPI Control Interface | No | No | Yes | Yes | No |
| Package type | SOIC-8/16 NB, SOIC-16 WB, QSOP-16 | SOIC-8/16 NB, SSO-8, SOIC-14/16 WB, 5x5 LGA-14, 5x5 QFN-14 | SOIC-8 NB, SOIC-16 WB, PDIP-8 GW, SSO-8 | QSOP-20, DFN-32 | SOIC-8 NB |
| Options with single-side biasing | Yes | Yes | No | Yes | Yes |
| Input supply range | 2.5 V - 5.5 V | 2.5 V - 5.5 V; 4.5 V -20 V | 3.0 V - 5.5 V | 3.0 V - 5.5 V | 3.0 V - 5.5 V |
| Output supply range | 2.5 V - 5.5 V | 6.5 V - 30 V | 3.0 V - 5.5 V | 3.0 V - 5.5 V (Si838x) 9.0 V - 32 V (Si834x) | - |
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| Featured Family | Si86xx, Si87xx, Si88xx | Si823x, Si827x, Si828x, Si823Hx | Si890x, Si892x, Si8540 | Si838x, Si834x | Si875x |
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Digital Isolators
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Safety IsolationUp to 5.0 kV RMS
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Timing specificationsUp to 150 Mbps data rate & 10 ns typical propagation delay
Our digital isolator portfolio offers products to suit the needs of a wide range of applications including industrial automation, EV’s (electric vehicles), power supplies, PV inverters, and motor control. These products provide robust and reliable isolation capabilities and the best timing specifications along with excellent noise immunity, both from external EM fields as well as common-mode transients. They have been designed for ultra-low EM emissions and support digital CMOS as well as bi-directional I2C data isolation. They are offered in configurations ranging from 1 to 6 channels in a single compact package.
Features:
- 1.0 kV RMS to 5.0 kV RMS isolation ratings
- 1 to 6 channels in a single package
- 1 to 150 Mbps data rate
- Uni-directional digital or bi-directional I2C I/O’s
Applications:
- Industrial - factory automation, process control, motor control
- Power supplies - for server/data centers, telecom base stations
- Automotive (EV’s) - Battery management systems, On board chargers (OBC), dc-dc inverters
- Industrial inverters - PV inverters, UPS
Si86xx Isolator Evaluation Kit
This board allows for basic functional testing and engineering validation of various isolation product configurations for the Si86xx isolator family.
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Isolated Gate Drivers
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ConfigurationsSingle, high-side/low-side or dual driver
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Peak gate drive current4 Amps
Our isolated gate drivers provide robust isolation and reliable gate drive integrated into single packages. With flexible offerings for Silicon Carbide, Gallium Nitride, and Silicon transistor gate drive, our isolated gate drivers complete any power supply, converter/inverter, motor drive, or charging need. With industry-leading common-mode transient immunity and a variety of industry-standard package types, there’s a solution for every switching application.
Features:
- 1 kV to 5 kV isolation ratings
- 4A symmetrical peak gate current
- Up to 200 kV/µs CMTI
- 1500 V driver-to-driver withstand voltage
Applications:
- Power supplies
- EV and industrial motor drives
- Solar Inverters
- EV charging and power conversion
Si823H2 Isolated Gate Driver
Evaluation Kit
This evaluation board allows designers to check out the functionality and performance of the Si823H2 high-side/low-side driver.
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Isolated Analog and ADC
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Offset Error0.2 mV
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Offset Drift1µV/˚C
Our isolated analog and ADC portfolio allows for current or voltage measurement directly on the high-voltage rail with high precision and maintains this accuracy with low drift across temperature. The devices are available in a 16-lead package with 5 kV RMS isolation or an 8-DIP with 3.75 kV RMS isolation.
Features:
- High common-mode transient immunity of up to 75 kV/µs
- Differential or single-ended analog input
- Differential analog, SPI, I2C, or UART output
Applications:
- AC, brushless, and DC motor control and inverters
- Automotive DC-DC, BMS, and charging
- Isolated switch mode and UPS power supplies
Si8920 Isolated Amplifier Evaluation Kit
This evaluation board allows for quick connection to a shunt resistor for checking the functionality and performance of the Si8920.
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Industrial I/O
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Safety IsolationUp to 2.5 kV RMS
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Data RateUp to 2 Mbps
Our industrial I/O products offer an IEC 61131-2 compliant solution for 24 V digital logic in a compact package complete with safety isolation. Out digital input solution requires no isolated power supply, provides built-in signal conditioning, and can be controlled with an efficient SPI interface. Our digital output solution offers protection against overload and inductive kickback in addition to a full suite of diagnostics
Features
- Up to four 700 mA digital outputs
- High-side or low-side output channels
- Eight digital inputs at up to 2 Mbps
- Sourcing or Sinking input channels
Applications:
- Programmable Logic Controllers (PLC)
- Server motor drives
- Automation and robotics controllers
Si8340 Smart Switch Evaluation Kit
Evaluate the quad channel, high side (sourcing) isolated smart switch with a parallel interface.
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Isolated FET Drivers
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Fast turn-off time35 µs
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Flexible inputDigital or Opto-emulator
A simple, reliable alternative to replacing solid-state relays (SSRs) or electromechanical relays (EMRs) when combined with an external, low-cost FET. Si875x devices combine robust CMOS isolation technology with a FET driver to form a complete, isolated switch. The self-contained device generates its own gate drive output voltage, reducing cost, size, and complexity. Si875x devices eliminate the need for bulky mechanical relays and allow self-selection for FET switches, so the design can be completely optimized for the application’s power, cost, and performance requirements.
Features:
- 10.3 V gate drive output with < 100 µs turn-on time
- Internally-generated secondary side power supply
- 2.5 kV RMS isolation rating
- Temperature range
- Industrial -40 to 105 °C
- Automotive -40 to 125 °C
Applications:
- HEV/EV battery monitoring
- Motor and valve controls
- HVAC control
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Automotive Isolation
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Isolation rating1.0 kVrms to 5.0 kVrms
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Automotive gradeAEC-Q100 qualification
Our automotive isolation devices combine automotive grade manufacturing, test, and documentation with the same industry leading features, performance, and certifications as our industrial-grade isolation products.
Features:
- True automotive grade products with automotive qualification, manufacturing, production test, and support
- AEC-Q100 qualification
- PPAP documentation and material listing system support (IMDS, CAMDS)
- -40 to +125 °C temperature range
Applications:
- Electric vehicles (EVs)
- Hybrid electric vehicles (HEVs)
- Mild-Hybrid electric vehicles (MEVs)
- 48 V automotive systems
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