Fast Bipolar Hall Sensors in Energy Saving CMOS

NEU-ISENBURG, Germany, November 23 - The new N- and S-pole sensing Hall-sensor series S-5721A/22A/23A are laid
out in CMOS with Push-Pull or N-Ch-Open-Drain Output. Despite low current
consumption magnetic field is detected fast and safe. The magnetism detection
logic, S-pole approximation initiates a "H" to "L" transition, (N-pole
initiates "L" to "H"), the supply voltage range of 4V to 5,5V and the
operating temperature range of -40degreesC to +85degreesC, are common to all
ICs. The Hall-Sensors differ in speed and current requirement on one hand and
magnetic sensitivity, energy-saving-option and package type on the other.
S-5722A/23A belong to the faster Hall ICs with a detection frequency of 7.6
KHz, corresponding to 0.132ms detection period. The resulting current
consumption of 0.95mA in the S-5722A can be reduced to 1nA using the
Power-Down-Function, pulsed operation for energy saving is possible. S-5723A
is destined for continuous operation, packaged in SOT-23-3 that can dissipate
430mW; its sensitivity is 3mT/-3mT typical. The S-5721A has the lowest
current requirements of only 0.08mA, which may be reduced to 1nA using the
Power-Down-Function. Its detection frequency of 0.63KHz corresponds to 1.58ms
detection period. With the faster S-5722A it has higher sensitivity of typ.
2.5mT/-2.5mT and the small SNT-4A package in common. The Hall sensor ICs are
aimed at rotation detection as found in the control of motors and drives. The
appropriate arrangement of 2 sensors permits detection of speed and direction
of rotation, a capability helpful for jog-dial switches. Seiko Instruments
manufactures and sells also magnets to control Hall sensor ICs.

    Contact:

    Paul Krisam, Technical Sales Support Manager, Components Department
    Seiko Instruments GmbH, Siemensstrasse 9, 63263 Neu-Isenburg, Germany
    Tel.: +49-6102-297-143, Fax: +49-6102-297-50-143
    Mobile: +49-172-6396-127,
    eMail: Paul.Krisam@seiko-instruments.de

Website: www.seiko-instruments.de

Contact: Paul Krisam, Technical Sales Support Manager, Components Department, Seiko Instruments GmbH, Siemensstrasse 9, 63263 Neu-Isenburg, Germany, Tel.: +49-6102-297-143, Fax: +49-6102-297-50-143, Mobile: +49-172-6396-127, eMail: Paul.Krisam at seiko-instruments.de