Bus Fault Protection for Industrial and Automotive Applications: Texas Instruments CAN Transceivers

Designed for industrial and automotive applications respectively, the ISO1042 and ISO1042-Q1 combine bus fault protection with common-mode transient immunity.

Today, Texas Instruments announced two new controlled area network (CAN) flexible data (FD) transceivers. One, the ISO1042 is designed for industrial applications. The other, the ISO1042-Q1, is meant for automotive applications.

These transceivers are galvanically isolated devices that offer ±70 VDC bus fault protection along with a ±30 V common-mode voltage range. A silicon dioxide insulation barrier is utilized with withstand voltage specified at 5000 V_RMS and working voltage specified at 1060 V_RMS. On the bus pins, the HBM ESD tolerance is ±16 kV.

Here's an overview of some of their features.



Basic and reinforced options of both the ISO1042 and ISO1042-Q1 are available in either a 10.3-mm-by-7.5-mm 16-pin DW package or in a 5.8-mm-by-7.5-mm, 8-pin DWV package.
Both units are available with either basic or reinforced isolation options.
Surge test voltage:

• 10,000 VPK for the Reinforced Version
• 6,000 VPK for the Basic Version

 

Data Speed

• Classic CAN up to 1 Mbps
• FD up to 5 Mbps
• Loop delay of only 152 ns, 215 ns maximum

 

Immunity and Emissions

For operation in electromagnetically noisy automotive or industrial environments.

• Common Mode Transient Immunity (CMTI) of 85 kV/us (minimum)
• ESD protection of +/- 8 kV

Environmental and Operational Considerations

The units operate over a temperature range of –40°C to +125°C.
Voltage ranges are as follows:

• VCC1 voltage range is 1.71 V to 5.5 V
• VCC2 voltage range is 4.5 V to 5.5 V

Application diagram for the ISO1042. Image used courtesy of Texas Instruments

ISO1042: Industrial Applications

The ISO1042 is intended for industrial applications and meets the ISO 11898-2:2016 and ISO 11898-5:2007 physical layer standards.
This version of the transceiver is targeted for applications such as:

• AC and servo drives
• Solar Inverters
• PLC and DCS communication modules
• Elevators and escalators
• Industrial power supplies
• Battery charging and management

ISO1042-Q1: Automotive Applications

The ISO1042-Q1, on the other hand, is intended for automotive applications. It meets the AEC Q100 standard for active components and is aimed at:

• Starter/generator
• Battery management systems
• DC/DC converters
• Onboard and wireless chargers
• Inverters
• Motor control

Evaluation Modules

Evaluation modules are available for both the ISO1042 its 16-pin SOIC package and its 8-pin versions. They are, respectively, the ISO1042DW and the ISO1042DWV.