Magnetics Business & Technology - March/April 2021 - 22

PRODUCT NEWS

Crocus Adds to Family of TMR Sensors for Current and Angular Measurement

The Crocus family of tunnel magneto-resistance sensors continues to grow energetically with several new products introduced
recently for current and angular sensing that are based on its
XtremeSense technology. Shown above is its CT220 contactless
current sensor which enables high isolation, high-resolution and
high accuracy measurements for power monitoring applications
without the need for magnetic concentrators or shields.
Sensitivity of the CT220 is extremely high, says Zack Deiri, CEO.
" This enables customers to detect a wide range of currents safely
and without sacrificing resolution at low currents. The CT220
is a zero-loss device enabling current monitoring at very low
power for battery-powered applications such as drones and IoT
devices. "
Coreless and contactless, it simply enables a multitude of applications including solar and power inverters, power supplies,
battery management systems, white goods, industrial appliances, and power distribution units, said Deiry. " It is an ideal
replacement for bulky current transformers, low sensitivity and
low resolution Hall-based current sensors, and shunt-based applications where isolation and temperature stability are required. "
It joins the CT110 a TMR plug-andplay device for current monitoring
applications requiring high linearity,
high resolution, miniature form-factor, isolation and design simplicity
which the company also introduced
recently.
" The CT110 demonstrates the advancement Crocus has achieved
CT110 for current monitoring
in TMR magnetic sensing
technology, " said Dieri. Using the
company's XtremeSense TMR
1D technology, it offers extremely low noise, high sensitivity, high
linearity, low temperature drift, and virtually no hysteresis which
renders existing sensing technologies obsolete. Due to its small
form-factor and high resolution, it is suitable for applications such
as smart plugs and IoT devices, appliances, drones, LED lighting, battery chargers, power tools, and PCs and servers. " The
CT110 is ideal for any application which requires current monitoring including those currently utilizing shunt resistors combined
with an isolation amplifier. "

Magnetics Business & Technology * March/April 2021

For angular sensing, Crocus recently came out with its second
generation XtremeSense TMR two-dimensional sensor for
contactless, high accuracy angular position detection. The new
CT310 is a successor product to the CT300 that was released in
2018.
It enables high
performance
with an ultra-low
angular error and
excellent stability
over a wide magnetic, temperature and voltage
ranges to address
demanding
market requirements. It consists
of two full-bridge
resistor networks that has an operating range of 25 mT to 90
mT. Over this range, it maintains an angular error of less than
0.25° with compensation over a wide temperature range of -40°C
to +150°C. The CT310 could be used in end-of-shaft or sideof-shaft configurations with very high frequency response, and
current consumption of less than 250 A.
" It far exceeds competitors' devices in terms of accuracy, resolution, power consumption, and reliability over temperature and
large magnetic field exposure, " says Deiri. " The CT310's high
sensitivity (400mV/V) allows designers to utilize the device in
their systems without the need for external components such as
amplifiers which lowers overall solution cost. It is highly suitable
for magnetic-encoder applications replacing outdated optical and
mechanical technologies. The CT310 offers contactless angular
sensing solutions for applications such as drones, motor control,
robotics, white goods, and automotive. "
Headquartered in Santa Clara, CA, Crocus Technology develops and manufactures magnetic sensors based on its patented
XtremeSense which it says brings disruptive advancements
to IoT and smart devices, industrial, consumer, medical, and
automotive electronics applications demanding high accuracy,
high resolution, stable temperature performance, and low power
consumption.
See www.crocus-technology.com.
www.MagneticsMag.com

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Magnetics Business & Technology - March/April 2021

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