Photocouplers boost accuracy with delta-sigma ADC

Two digital output isolation amplifiers for current and voltage sensing in power converters, the TLP7830 and TLP7930, achieve high accuracy through the inclusion of a delta sigma ADC, claims Toshiba.

Monitoring the phase current of motors and BUS voltage fluctuations provides feedback to microcontrollers in factory automation equipment, to achieve high-precision operation. The delta sigma ADC at the input side enables the photocouplers to achieve a high level of linearity of 4LSB (typical) at intergrity non linearity.

Both provide a guaranteed common mode transient immunity of 20kV/micro seconds (typical at VCM=1kV, Ta=25˚C). This enables stable operation in electrically noisy environment, says the company, for motor control applications. The optical barrier guarantees an isolation voltage of 5000V rms (minimum). The devices support a wide operating temperature range of -40 to +105˚C.

 Two package types are available. TLP7930 is supplied in an industry-standard DIP8 package and the TLP7830 is available in a compact SO8L package, which takes up 30% less board space and features a 40% lower profile.


    Leave a Reply

    You must be logged in to post a comment.

    Latest News from Softei

    This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the electronics industry, with daily news updates, new products and industry news. To stay up-to-date, register to receive our weekly newsletters and keep yourself informed on the latest technology news and new products from around the globe. Simply click this link to register here: Softei Registration