CT4022
© 2023 Crocus Technology
CT4022 · Rev. 0.1
1
PRELIMINARY DATASHEET
XtremeSense® TMR Current Sensor with High dV/dt Immunity,
Common-Mode Field Rejection and 3 kV
RMS
Galvanic Isolation
FEATURES
• 10 A to 65 A Unipolar and Bipolar Range
• Optimized for high dV/dt applications
• 500 kHz Bandwidth
• Common-mode Field Rejection
• 0.5 m Primary Conductor Resistance
• Ratiometric Output from Supply Voltage
• ±3% Max Total Error from -40°C to 125°C
• UL/IEC 62387 Certification
o Rated Isolation Voltage 3 kV
RMS
o Basic Isolation Working voltage 701 V
RMS
o Reinforced Isolation Working Voltage 344 V
RMS
• Supply Voltage: 3.3 V or 5.0 V
• Available in 8-Lead SOIC Package
PRODUCT DESCRIPTION
The CT4022 is a highly linear, XtremeSense® TMR based
Current Sensor. The TMR sensor is differential which
enables common-mode field rejection to cancel out stray
magnetic fields. The primary conductor is only 0.5 m
which enables the sensor to withstand high in-rush current
and minimize power loss. The current applied to the pin of
the primary conductor generates an internal differential
magnetic field. The TMR sensor provides a proportional
voltage to the differential magnetic field while rejecting
common-mode stray magnetic fields. Crocus
Technology’s patented TMR temperature compensation
provides extremely low temperature coefficients.
The pins of the primary conductive path and the sensor
leads are galvanically isolated. This enables high-side
current sensing without the need for additional isolation
techniques. The CT4022 is offered in an industry standard
8-lead SOIC package that is “green” and RoHS compliant.
The small footprint and low-profile footprint well-suited for
space-constrained applications.
PACKAGE: 8-lead SOIC (SN8 suffix)
APPLICATIONS
• Motor Control
• Power Inverters
• UPS, SMPS and Telecom Power Supplies
• Consumer and Enterprise Electronics
• Over-Current Fault Protection
TYPICAL APPLICATION
CT4022
XtremeSense® TMR Current Sensor with High dV/dt Immunity,
Common-Mode Field Rejection, 3 kV
RMS
Galvanic Isolation
© 2023 Crocus Technology
CT4022 · Rev. 0.1
2
PRELIMINARY DATASHEET
Part Ordering Information
Part Number
Current Range
(I
PMAX
)
Sensitivity
(mV/A)
V
CC
= 3.3V
Sensitivity
(mV/A)
V
CC
= 5.0V
Polarity
Package
CT4022-H10BSN8
±10
132
200
Bidirectional
8-lead SOIC
4.89 6.00 1.62 mm
CT4022-H20BSN8
±20
66
100
CT4022-H30BSN8
±30
43.6
66
CT4022-H40BSN8
±40
33
50
CT4022-H50BSN8
±50
26.4
40
CT4022-H65BSN8
±65
20.5
31
CT4022-H30USN8
30
87.1
132
Unidirectional
Evaluation Board Ordering Information
Part Number
Current Range (I
PMAX
)
Polarity
Operating Temperature Range
CTD4022-10B
±10
Bidirectional
-40°C to +125°C
CTD4022-20B
±20
CTD4022-30B
±30
CTD4022-40B
±40
CTD4022-50B
±50
CTD4022-65B
±65
CTD4022-30U
30
Unidirectional