August 2021
© 2021 Crocus Technology 1
CT110 · Rev. 2.6
CT110
XtremeSense™ High Linearity, High-Resolution TMR Current Sensor
with FLAG Output in Miniature Form Factor
Features
• AC or DC Current Range:
o +5.0 A
DC
/ ±5.0 A
PK
o +10.0 A
DC
/ ±10.0 A
PK
o +15.0 A
DC
/ ±15.0 A
PK
• Resolution: 5 mA
• Total Output Error: <±0.5% (Typical)
• 2 kV Isolation per IEC 60950-1:2005
• Sampling Frequency: 200 kHz
• Supply Current: ~1.2 mA
• FLAG Pin to Detect 90% and 10% of Full Current
Range
o Active LOW Digital Output (Push-pull)
• Supply Voltage: 2.7 V to 5.5 V
• Operating Temperature Ranges:
o Industrial: -40°C to +85°C
o Extended Industrial: -40°C to +125°C
• Package: 6-lead DFN, 3.00
× 3.00 × 0.95 mm
Product Description
The CT110 is a high linearity and high-resolution contact
current sensor with isolation from Crocus Technology that
is designed with its patented state-of-the-art
XtremeSense™ TMR technology for high performance. It
measures the current flowing through the DFN package via
its integrated Current Carrying Conductor (CCC) and
converts it to an analog ratio-metric
output voltage that
represents the current. The CT110 achieves superior
performance with a typical total output error of less than
±0.5% and is capable of sensing current as low as 5 mA
providing unmatched resolution.
It supports a wide
operating voltage range of 2.7 V to 5.5 V which allows it to
be used in variety of applications.
It is an ideal solution to replace shunt resistor plus isolation
amplifier. At the same time, the CT110 simplifies design,
PCB layout and saves PCB area. It is capable of supporting
up to 15.0 A of AC and DC current.
Also, the CT110 has a sampling frequency of 200 kHz but
only has minimal current consumption of 1.0 mA to bias it
since the measured current does not go through the device.
Additionally, the CT110 integrates a FLAG output that is
active LOW and will indicate when the field is above 90%
and below 10% the full field range.
It is available in a low profile and small form factor 3.00
×
3.00
× 0.95 mm, 6-lead DFN package.
Applications
• Shunt Resistor plus Isolation Amplifier Replacement
• Smart Plugs/IoT Devices
• LED Lighting Products
• Power Tools
• Appliances
• Drones
• Battery Charger Systems
• PCs and Servers
CT110 www.crocus-technology.com
© 2021 Crocus Technology 2
CT110 · Rev. 2.6
CT110 Block Diagram
3
2
1
Isolation
Barrier
Current Carrying Conductor (CCC)
Analog
Front-End
State Machine
Analog
XtremeSense
TMR
Digital
(Push-pull)
4
GND
FLAG
ANA
VDD
Figure 1. CT110 with Analog and FLAG Outputs in DFN-6 Package Block Diagram
CT110 Direction of Current Flow Diagrams
Figure 2. CT110: Direction of AC Current Flow for
DFN-6.
Figure 3. CT110: Direction of DC Current Flow for
DFN-6.