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 capacitor SpecificationsSupply 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 ..................................nlimited
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® A1101-A1104 and A1106 Hall-effect switches are next generation replacements for the popular Allegro 312x and 314x lines of unipolar switches. The A1101-A1104 and A1106 family, produced with BiCMOS technology, consists of devices that feature fast power-on time and low-noise operation. Device programming is performed after packaging, to ensure increased switchpoint accuracy by eliminating offsets that can be induced by package stress. Unique Hall element geometries and low-offset amplifiers help to minimize noise and to reduce the residual offset voltage normally caused by A1101-A1104 and A1106 overmolding, temperature excursions, and thermal stress.
The A1101-A1104 and A1106 Hall-effect 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 for superior protection in automotive and industrial motor commutation applications, without adding external components. A1101-A1104 and A1106 in the family are identical except for magnetic switchpoint levels.
The small geometries of the BiCMOS process allow A1101-A1104 and A1106 to be provided in ultrasmall packages. The package styles available provide magnetically optimized solutions for most applications. Package LH is an SOT23W, a miniature low-profile surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. Each package of A1101-A1104 and A1106 is lead (Pb) free, with 100% matte tin plated leadframes.
A1102 Data Sheet
