Features and Benefits
▪ End-of-line programmable sensor
▪ Ratiometric or fixed (SOIC8 package only)
analog output
▪ Flexible Supply Voltage with factory
selectable 5V or 3.3V mode
▪ Measurement range from ±12.5 to
±400mT
▪ High speed sensing
▪ DC to 400kHz bandwidth
▪ 2μs response time
▪ High linearity down to ±0.5% full scale
▪ Low noise
▪ AEC-Q100 – Grade 0 Automotive
Qualification
▪ Very low thermal drift for wide
temperature range
▪ Offset drift (<5mV)
▪ Sensitivity drift (<1%)
▪ Internal and external (SOIC8 package only)
overcurrent detection
▪ RoHS compliant
▪ Available in SIP4-VA (MSL-1) and SOIC8
packages (MSL-3)

3. Description
The MLX91219 is a monolithic Hall-effect sensor
which is sensitive to the flux density applied
orthogonally to the IC surface. The sensor provides
an analog output voltage proportional to the
applied magnetic flux density.
The transfer characteristic of the MLX91219 is
factory trimmed over temperature, and is
programmable (offset, sensitivity, filtering,
internal overcurrent threshold) during end-of-line
customer calibration. With the 400kHz bandwidth
and fast response time, it is particularly adapted
for high speed applications such as inverters and
converters where fast response time due to fast
switching is required.
In a typical current sensing application, the sensor
is used in combination with a ring shaped soft
ferromagnetic core. This core is recommended to
be laminated for high bandwidth applications. The
MLX91219 is placed in a small air gap and the
current conductor – a bus bar or a cable – is passed
through the inner part of the ferromagnetic ring.
On the one hand the ring concentrates and
amplifies the magnetic flux seen by the sensor IC,
and at the same time it attenuates external
magnetic field disturbances.

2. Application Examples
▪ High Voltage Traction Motor Inverter
▪ 48V Boost Recuperation Inverter
▪ DCDC Converter
▪ Smart Battery Junction Boxes
▪ Smart Fuse Overcurrent Detection