Product category:
Circuit Protection Devices
News Release from: Texas Instruments (April 2001-March 2006) | Subject: ISO721 and ISO721M
Edited by the Electronicstalk Editorial
Team on 24 January 2006
Digital isolators upgrade optocoupler
performance
A new family of high-performance digital isolators feature on-chip capacitors to enable faster data transmission with higher signal integrity.
Texas Instruments has introduced a family of high-performance digital isolators, featuring on-chip capacitors to enable faster data transmission with higher signal integrity These capacitive isolators lead the industry with the fastest datarates combined with high reliability, provide six orders of magnitude higher magnetic immunity than existing inductive devices, and use 60% less power than high-performance optocouplers
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The new isolators improve system performance and reduce cost in high-voltage, noisy applications such as factory automation, process control and data acquisition systems.
"Using the intrinsic capacitor properties, TI's technology behind the ISO721 and ISO721M delivers great immunity from magnetic noise sources", said Art George, Vice President of TI's High Performance Linear Business.
"It enables the perfect combination of high-speed data transmission with industrial-grade requirements for reliability to match the performance and long lifetime needs of industrial isolation applications".
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The ISO721 and ISO721M provide high-performance data transmission and circuit protection with isolation of up to 560V of operating voltage or 4000V peak overvoltage transient.
The ISO721M is suited for applications requiring fast digital data to be transmitted with low incidence of system noise.
The ISO721 is more flexible and robust for transmitting data in noisy environments.
The devices meet the standards for isolators set by Underwriters Laboratory (UL1577), International Electrotechnical Commission (IEC60747-5-2) and Canadian Standards Association (CSA Component Acceptance Notice 5A).
By using on-chip, high-voltage capacitors, the TI isolators transmit data up to three times faster while using less power than commonly used high-performance optocouplers.
In addition, TI's capacitive technology offers the advantage of immunity from external magnetic fields that frequently occur in the industrial environment and can distort signal integrity.
These devices also offer high immunity against data corruption due to fast voltage transients, providing a minimum protection level of 25kV/us.
TI's isolators use a semiconductor-grade silicon oxide dielectric.
This stable, high-performance insulator provides proven reliability and long operational life.
These are critical requirements in industrial applications where voltage surges can otherwise degrade device lifetime.
At typical operating voltage, each device's life expectancy exceeds 25 years.
The ISO721 and ISO721M join TI's diverse offering of integrated circuits for industrial applications, including the TMS320C2000 platform of digital signal processors, RS485 transceivers (HVD33), the Chipcon line of low-power wireless transceiver ICs, isolated DC/DC convertors (DCP010507DB), MSP430 ultra-low-power microcontrollers, CAN transceivers, and high-precision amplifiers and data convertors (ADS1203).
For more information on TI's interface products, please see the Interface Selection Guide at interface.ti.com.
The ISO721 and ISO721M devices are now available from TI and authorised distributors in an eight-pin small-outline integrated circuit (SOIC) package.
The price is $1.65 in 1000-unit quantities.
An evaluation module is available.
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