US2882

US2881/2882 CMOS High Sensitivity Latch • • • • • • • • • • • • Features and Benefits Chopper stabilized amplifier stage Optimized for BDC motor applications New miniature package / thin, high reliability package Operation down to 3.5V CMOS for optimum stability, quality, and cost Ultra low IDD current Solid state switch Brushless DC motor commutation Speed sensing Linear position sensing Angular position sensing Current sensing Applications Ordering Information Part No. US2881 / US2882 US2881 / US2882 Temperature Suffix Package Temperature Range E SO or UA -40oC to 85oC Extended L SO or UA -40oC to 150oC Full Temp. *Contact Factory or Sales Representative for Legacy Temperature Versions Functional Diagram Description The design specifications and performance of the Melexis US2881 have been optimized for commutation applications in brushless DC motors and automotive speed sensing. The output transistor will be latched on (BOP) in the presence of a sufficiently strong South pole magnetic field facing the marked side of the package. Similarly, the output will be latched off (BRP) in the presence of a North field. The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on (BOP) in the presence of a sufficiently strong North pole magnetic field subjected to the marked face. SO Package Pin 1 - VD D Pin 2 - Output Pin 3 - GND V DD Output Voltage Regulator Chopper GND UA Package Pin 1 - V D D Pin 2 - GND Pin 3 - Output Note: Static sensitive device; please observe ESD precautions. Re verse VDD protection is not included. For reverse voltage protection, a 100 Ω resistor in series with VDD is recommended. US2881 CMOS High Sensitivity Latch 3901002881 Rev 5.6 23/July/00 Page 1 US2881/2882 CMOS High Sensitivity Latch US2881 and US2882 Electrical Specifications DC operating parameters: TA = 25oC, VDD = 12VDC (unless otherwise specified). Parameter Supply Voltage Supply Current Saturation Voltage Output Leakage Output Rise Time Output Fall Time Symbol Test Conditions VDD IDD VDS(on) IOFF tr tf Operating BBOP B