The Cosemitech CHA44XP/CH44XP Hall-effect Sensor，extremely Temperature-stable and Stress-resistant Sensor ICs

PublishTime： 2022-03-11 Article Source：Cosemitech

The Cosemitech CHA44xP/CH44xP Hall-effect sensor is extremely temperature-stable and stress-resistant sensor ICs, well suited for operation over extended temperature ranges from -40°C to 150°C. Superior high-temperature performance is possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device over-molding, temperature dependencies, and thermal stress.

The device includes a voltage regulator, Hall voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short circuit protected open-drain output to sink up to 25 mA. It also integrated internal clamps against supply/output transients; output short circuits protection; reverse battery conditions. The advantage of operating down to 2.5V is that the device can be used in 2.5V applications or with additional external resistance in series with the supply pin for greater protection against high-voltage transient events.

The CHA44XP/CH44XP series is a latch Hall switch. For the latch mode, there are also invert polarity devices. Normally a south pole of sufficient strength turns on the output; However, for invert polarity devices, a north pole of sufficient strength turns on the output.

Fig. Functional Block Diagram

Features
• AEC-Q100 automotive-qualified for CHA44XP
• Build in 10K ohm output pull up resistor
• Multiple Sensitivity Options (BOP / BRP):+15 / -15 Gs; +30 / -30 Gs; +45 / -45 Gs; +120 / -120 Gs;
• Chopper stabilization for stable operate points throughout operating temperature range
• Operation supply voltage 2.5V to 5.5V
• Absolute maximum supply 24V
• Resistant to physical stress
• Output short-circuit protection
• Operation from the unregulated supply
• Reverse-battery protection -22V
• Freewheeling protection
• Solid-state reliability
• Wide Operating temperature range: -40 to 150 °C
• Package options: TO-92S, SOT-23, SOT-89 and DFN

Absolute Maximum Ratings

Table.1

Application
• Car seat motor position sensor
• BLDC motor commutation
• Car window position sensor
• flow-rate sensing
• Motor and fan control
• Tiny motor position sensor

Product Family Members

Table.2 CHA44XP is an automotive class product family

Table.3 CH44XP is industry class product family

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