Allegro® A1101-A1104 and A1106Hall-effect switchesIt is a next-generation replacement for the popular Allegro 312x and 314x series of unipolar switches. The A110x series is manufactured using BiCMOS technology and features fast power-up and low operating noise. Device programming occurs after the package to eliminate offset due to package stress, ensuring higher switchpoint accuracy. Unique Hall element geometry and low offset amplifiers help reduce noise and reduce residual offset voltages typically caused by device overmolding, temperature surges, and thermal stress.
The A1101-A1104 and A1106 Hall-effect switches contain the following components in a single silicon: voltage regulator, Hall voltage generator, small signal amplifier, Schmitt trigger, and NMOS output transistor. An integrated voltage regulator allows operation between 3.8 and 24 V. Extended on-board protection circuitry enables an absolute maximum voltage rating of ± 30 V, providing superior protection for automotive and industrial motor rectification applications without the need for additional external components. All devices in the family make no difference except for the magnetic switchpoint level.
The small and delicate geometry of the BiCMOS process allows these devices to be available in ultra-small packages. Available package types provide magnetically optimized solutions for most applications. Package LH is a SOT23W miniature low profile surface mount package, while Package UA is a three-pin ultra-small SIP for via mounting. All packages are lead-free and the leadframes are 100% matte tin plating.
- Work continuously
- Stable operation over the entire operating temperature range
- Reverse battery protection
- High reliability
- Line programming gives it optimal performance
- Reliable EMC performance
- High ESD protection rating
- Regulator stability without bypass capacitors
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