Silicon Labs CMOS digital isolators are mixed-signal IC solutions that leverage Silicon Labs' superior isolation and high voltage expertise to enhance power system performance, flexibility, and reliability while reducing system size and cost. The entire isolation portfolio supports isolation voltages up to 5kV. Silicon Labs Si84xx digital isolators are the industry's highest-performance, easiest-to-use, and lowest-cost line of 2.5kVrms to 5.0kVrms rated digital isolators. These digital isolators are 10 times more reliable than optocouplers. The Si86xx family is the industry's highest performing, widest channel count series of unidirectional and bidirectional isolators supporting up to reinforced 5kVrms isolation ratings. Based on Silicon Labs' patented CMOS isolation technology, Si86xx isolators enable robust operation in harsh industrial applications.
Product Comparison: Si84xx and Si86xx
|| Max Isolation Voltage (kV)
|| Min CMTI (kV/µs)
|| Input Device
|| Input VDD Range (V)
|| Output VDD Range (V)
|| Current/Ch at VDD = 5 V, 1 Mbps (mA)
|| Max Prop Delay (nS)
|| Max Pulse Width Distortion (nS)
|| Minimum Pulse Width (nS)
|| 2.7 to 5.5
|| 2.7 to 5.5
|| Schmitt Trigger
|| 2.5 to 5.5
|| 2.5 to 5.5
Silicon Labs Si86xx digital isolators are the industry's first six-channel 5kV digital isolators. These Silicon Labs six-channel digital isolators offer the highest channel count, performance, and data rate for demanding applications with isolation ratings up to 5kV. Si86xx digital isolators replace optocouplers in target applications requiring robust operation and high levels of insulation protection, such as industrial automation and drives, motor control, and medical systems. With its 5kV rating, the Si86xx family offers an ideal isolation solution for isolated ac-dc and dc-dc power supplies, as well as solar panel microinverters, data communications systems, and hybrid electric vehicles (HEVs).
Silicon Labs Si86xx isolators deliver the industry's fastest data rate (150 Mbps) across the widest temperature range (-40 to 125ºC), as well as ultra-low power operation of less than 1.6 mA per channel at 1 Mbps for energy-efficient system design. The robust architecture of the Si86xx family ensures that signal integrity is maintained even while operating at high data rates and at high temperatures in harsh environments.
- Up to 5kVrms isolation
- UL, CSA, VDE certification
- 60-year life at rated working voltage
- High electromagnetic immunity
- Supply voltage 2.5 to 5.5 V
- Independent, bidirectional SDA and SCL isolation channels
- Open drain outputs with 35 mA sink current
- Supports I²C clocks up to 1.7 MH
- Unidirectional isolation channels support additional system signals (Si8605, Si8606)
- -40 to +125 °C temperature range
- Common mode transient immunity 50 kV/μs
- AEC-Q100 qualification
- AC Induction Motor
- Battery Voltage Domain
- Brushed and Brushless DC Motor
- DSL Integrated Access Device with Isolated FXS
- Electricity Meters
- Electronic Lighting Ballast
- Integrated Digital TV
- Industrial Automation/Programmable Logic Controller
- Metering Aggregator
- Motor Control
- Optical Network Unit
- PLC and I/O Modules
Si86xx Video: Low EMI Isolation in Medical Applications
Si840xI2C-KIT I²C digital isolator evaluation kit provides a convenient engineering break out board for easy evaluation of the Si840x series of I²C isolators. This kit comes populated with all versions of Silicon Labs' 2.5kV I²C isolator products.
Si840xI2C-KIT evaluation kit offers an overview of the Si84xx isolation product family with three different bidirectional I²C compliant isolators and a two-channel isolator.
Si84XXCOM-RD Digital Isolated Communications Reference Design Kit helps demonstrate the low power, reliability and 5kV isolation ratings required in many demanding industrial applications.This new reference design showcases isolated RS-232, RS-485, and CAN interfaces alongside our 2.5kV and 5.0kV digital isolators.
RD Kit Contents
- Isolated RS232 - Si8442 2.5 kV 4-Channel Isolator
- Isolated 4-Wire RS422/485 - Si8421 2.5 kV 2-Channel Isolator
- Isolated CAN Bus - Si8421 5 kV 2-Channel Isolator
Si84xxISO-KIT evaluation kit provides a convenient engineering break out board for simplifying evaluations of the Si84xx isolation product family with three different isolators (2, 4 and 6-channel) as well as a bidirectional I²C compliant isolator. Si84xxISO evaluation board allows designers to evaluate Silicon Lab's family of CMOS ultra-low-power isolators. These isolators are CMOS devices employing RF coupler technology to transmit digital information across an isolation barrier. Very high speed operation at low power levels is achieved. These products are based on Silicon Laboratories' proprietary RF isolation technology and offer shorter propagation delays, lower power consumption, improved noise immunity, smaller installed size, and more stable operation with temperature and age versus opto couplers.
Si86ISOLIN-KIT ISOLinear reference design is intended for designers looking for a complete, high performance alternative to expensive isolation amplifiers used to implement analog signal isolation. This linear isolation reference design includes three different cost/performance-optimized analog isolation circuits, supporting input signal bandwidths from 100 kHz (at 12-bit resolution) to 500kHz (at 10-bits).
Each of the three independent reference circuits modulates an incoming analog signal, transmits the resulting digital signal through an Si86xx digital isolator and then filters the resulting output to reconstruct the analog input signal. Key applications include isolation amplifiers for sensors, ground loop elimination, level shifting and motor control. The heart of the ISOlinear reference design is a 150 Mbps Si86xx digital isolator. The board is populated with an Si8630BD 5kV 3-channel isolator and two Si8630ED 5kV 3-channel isolators.
Si86xxISO-KIT Si86xx isolator evaluation kit includes several 5kV isolators. This board is intended to simplify basic functional testing and engineering validation of various isolation product configurations.
Si86xx Isolator Eval Kit Contents
- Si8600 5kV bidirectional I²C isolator
- Si8605 5kV bidirectional I²C isolator
- Si8621 3.75kV 2-channel isolator
- Si8655 1kV 5-channel isolator
- Si8663 5kV 6-channel isolator
- Si8663 3.75kV 6-channel isolator