Bi-directional I²C isolators said to be industry's first
15 November 2006
Circuit & System Protection
Analog Devices is introducing what it claims is the industry's first products to provide true bidirectional isolation for the I²C serial computer bus in industrial, networking and power supply applications.
Based on ADI's award-winning iCoupler technology, the company says the ADuM125x family of digital isolators reduces board space by as much as 80% and achieve a low-cost I²C isolation solution. This is accomplished by eliminating the optocouplers and support circuitry previously required in isolated I²C interfaces.
The I²C bus is a cost-effective, two-wire interface between controllers and peripheral devices. The bus uses bidirectional lines to transmit and receive signals over the same wire, allowing two-wire signalling of clock and data. This reduces complexity and cost by eliminating extra wiring and components. In a variety of applications, controllers or peripherals are isolated from the bus to avoid interference or harmful voltage levels. Typically, isolation has been achieved with optocouplers, but, using the ADuM125x isolators, only a single component is needed to provide bidirectional isolation for both of the I²C lines.
iCoupler I²C digital isolators are based on proprietary iCoupler chip-scale micro-transformer technology. They provide 2,5 kV of isolation across bidirectional I²C lines in a single, narrow-body 8-lead SOIC package. This eliminates the need for additional circuitry to split I#178;C signals into separate transmit and receive signals and then use standalone optocouplers. The ADuM1250 provides two bidirectional channels. The ADuM1251 provides one bidirectional channel and one unidirectional channel for those applications in which a bidirectional clock is not required. Both devices are capable of operation up to 400 Kbps and are compatible with SMBus and PMBus protocols.
Further reading:
EMC limits and levels
Altron Arrow
Editor's Choice Circuit & System Protection
As soon as electronics and electrical systems started interfering with each other, the world had to come to some consensus. Considering physics is universal and does not care about what country electrical/electronic products are used in, it should be the same everywhere, right? It is nearly there, but not quite.
Read more...
Clearing the Static: The importance of cleaning in ESD control
Circuit & System Protection
The proper cleaning of ESD-safe areas and equipment such as workstations, floors, mats, trays, and tools using specialised antistatic cleaners is vital to prevent ESD damage.
Read more...
Safety relay for explosive areas
IOT Electronics
Circuit & System Protection
Phoenix Contact has expanded its safety portfolio with the new PSR-MC35-EXI safety relay module, specifically engineered for use in potentially explosive environments.
Read more...
Clearing the Static: Ensuring effective ESD control
Actum
Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.
Read more...
Clearing the Static: The importance of ESD audits
Actum
Circuit & System Protection
An ESD audit is the first step in establishing an effective static control programme in the workplace, and will help identify vulnerable areas and potentially hazardous static zones that require improvement.
Read more...
EMI shielding materials application guide
Circuit & System Protection
TE Connectivity’s shielding solutions include electrically conductive elastomers, gaskets, knitted wire mesh, oriented wire, EMI shielding ventilation panels, shielded window, cable shielding and shielding components.
Read more...
Clearing the Static: ESD containers and packaging
Actum
Circuit & System Protection
Vacuum forming ESD
Electronic components can be damaged by electrostatic discharges. To protect against such damage, electronic assembly parts are often transported or stored in vacuum formed component
...
Read more...
Electrostatic discharge chairs
Actum
Circuit & System Protection
An ESD chair forms an integral part of grounding within the electrostatic discharge protected area to prevent potential damage to products.
Read more...
Conductive ESD footwear
Actum
Circuit & System Protection
Conductive ESD footwear is used in conjunction with other grounding devices, such as a wrist strap, cord, and ESD surface mats, to provide a continuous path to ground.
Read more...
Clearing the Static: The importance of cleaning in ESD control
Actum
Circuit & System Protection
To prevent Electrostatic Discharge (ESD) damage to sensitive electronic assemblies and components, all production, handling, packaging, and storage must take place in an ESD-protected environment.
Read more...
printer friendly version