1 Features
• High continuous current capability: 75 ARMS
• Robust reinforced isolation
– Withstand isolation voltage: 5000 VRMS
– Reinforced working voltage: 1100 VDC
• High accuracy
– Sensitivity error: 0.3%
– Sensitivity drift: 20 ppm/°C
– Offset error: 0.5 mV
– Offset drift: 5 μV/°C
– Linearity error: 0.1%
• Low lifetime drift: 0.5% (maximum)
• High immunity to external magnetic fields
• Precision zero-current reference output
• Signal bandwidth: 250 kHz
• Low propagation delay: 600 ns
• Fast overcurrent detection response: 500 ns
• Operating supply range: 3 V to 5.5 V
• Bidirectional and unidirectional current sensing
• Multiple sensitivity options:
– TMCS1123x1: 25 mV/A
– TMCS1123x2: 50 mV/A
– TMCS1123x3: 75 mV/A
– TMCS1123x4: 100 mV/A
– TMCS1123x5: 150 mV/A
• Safety related certifications (planned)
– UL 1577 Component Recognition Program
– IEC/CB 62368-1

2 Applications
• Solar Energy
• Motor control
• EV charging
• Power supplies
• Industrial AC/DC
• Overcurrent protection

3 Description
The TMCS1123 is a galvanically isolated Hall-effect
current sensor with industry leading isolation and
accuracy. An output voltage proportional to the
input current is provided with excellent linearity and
low drift at all sensitivity options. Precision signal
conditioning circuitry with built-in drift compensation
is capable of less than 1.75% maximum total error
over temperature and lifetime with no system level
calibration, or less than 1% maximum total error with
a one-time room temperature calibration (including
both lifetime and temperature drift).
AC or DC input current flows through an internal
conductor generating a magnetic field measured
by integrated on-chip Hall-effect sensors. Coreless
construction eliminates the need for magnetic
concentrators. Differential Hall sensors reject
interference from stray external magnetic fields. Low
conductor resistance increases measurable current
ranges up to ± 96A while minimizing power loss and
easing thermal dissipation requirements. Insulation
capable of withstanding 5000VRMS, coupled with
minimum 8.1 mm creepage and clearance provide
up to 1100VDC reliable lifetime reinforced working
voltage. Integrated shielding enables excellent
common-mode rejection and transient immunity.
Fixed sensitivity allows the TMCS1123 to operate
from a single 3V to 5.5V power supply, eliminates
ratiometry errors, and improves supply noise
rejection.