Features: Continuous-time operation
Fast power-on time
Low noise
Stable operation over full operating temperature range
Reverse battery protection
Solid-state reliability
Factory-programmed at end-of-line for optimum performance
Robust EMC performance
High ESD rating
Regulator stability without a bypass capacitorSpecificationsSupply Voltage, VCC ..............................................30 V
Reverse-Supply Voltage, VRCC ...........................30 V
Output Off Voltage, VOUT.......................................30 V
Reverse-Output Voltage, VROUT ....................... 0.5 V
Output Current, IOUTSINK...................................25 mA
Magnetic Flux Density, B .................................Unlimited
Operating Temperature
Ambient, TA, Range E............................40ºC to 85ºC
Ambient, TA, Range L..........................40ºC to 150ºC
Maximum Junction, TJ(max)
........................165ºC
Storage Temperature, TS ..................65ºC to 170ºCDescriptionThe Allegro® A1201, A1202, A1203 and A1204 Hall-effect bipolar switches are next-generation replacements and extension of the popular Allegro A3134, A3133, and A3132 bipolar switch product line. Overall, the A120x family, produced with BiCMOS technology, consists of continuous-time devices that feature fast power- on time and low-noise operation. A1201, A1202, A1203 and A1204 programming is performed after packag- ing, to ensure increased switchpoint accuracy by eliminating offsets that can be induced by package stress. Unique Hall element geometries and low-offset ampli- fiers help to minimize noise and to reduce the residual offset voltage normally caused by device overmolding, temperature excursions, and thermal stress.
The A1201, A1202, A1203 and A1204 Hall-effect bipolar switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator permits operation from 3.8 to 24 V. The extensive on-board protection circuitry makes possible a ±30 V absolute maximum voltage rating of A1201, A1202, A1203 and A1204. for superior protection in auto- motive and motor commutation applications, without adding external components.
A1204 Data Sheet
