Production£º

ultra high sensitivity Hall sensor integrated with pull high resistor

MH189datasheet.pdf

MH 189 Hall-effect sensor is a temperature stable, stress-resistant sensor. Superior
high-temperature performance is made possible through a dynamic offset cancellation that
utilizes chopper-stabilization. This method reduces the offset voltage normally caused by
device over molding, temperature dependencies, and thermal stress.
The MH 189 includes the following on a single silicon chip: voltage regulator, Hall
voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short
circuit protected Pull-up resistor output. Advanced CMOS wafer fabrication processing is used
to take advantage of low-voltage requirements, component matching, very low input-offset
errors, and small component geometries.
This device requires the presence of both south and north polarity magnetic fields for
operation. In the presence of a south polarity field of sufficient strength, the device output
sensor on, and only switches off when a north polarity field of sufficient strength is present.
The MH 189 is rated for operation between the ambient temperatures ¨C40¡ãC and 85¡ãC for
the E temperature range, and ¨C40¡ãC to 125¡ãC for the K temperature range. The two package
styles available provide magnetically optimized solutions for most applications. Package SO is
an SOT-23, a miniature low-profile surface-mount package, while package UA is a three-lead
ultramini SIP for through-hole mounting.
Features and Benefits

Chopper stabilized amplifier stage

Optimized for BLDC motor applications

New miniature package / thin, high reliability package

Operation down to 3V

100% tested at 125
¡æ
for K.

Custom sensitivity / Temperature selection are available.
Applications

High temperature Fan motor

3 phase BLDC motor application

Speed sensing

Position sensing

Current sensing

Revolution counting

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Frances New