A1101, A1102, A1103, A1104, and A1106
Continuous-Time Switch Family
Features and Benefits
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
Description
The Allegro® A1101-A1104 and A1106 Hall-effect switches are next generation replacements for the popular Allegro 312x and 314x lines of unipolar switches. The A110x 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 device 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. All devices in the family are identical except for magnetic switchpoint levels.
The small geometries of the BiCMOS process allow these devices 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 is lead (Pb) free, with 100% matte tin plated leadframes.
Replacement Device Characteristics Table
Device A110x Characteristics
BOP BRP Hys
Legacy Replacement Min Max Min Max Min Max
3141 A1101 30 175 10 145 20 80
3142 A1102 115 245 60 190 30 80
3143 A1103 205 355 150 300 30 80
3144 A1104 35 450 25 430 20 -
3121 A1106 260 430 160 330 70 140
Functional Block Diagram
A1101、A1102、A1103、A1104、A1105、A1106、Complete Part Numbers
Part Number Package Type RoHS Temperature
Compliant
A1101ELHLT-T 3-lead SOT Yes -40 °C to 85 °C
A1101EUA-T 3-pin SIP Yes -40 °C to 85 °C
A1101LLHLT-T 3-lead SOT Yes -40 °C to 150 °C
A1101LUA-T 3-pin SIP Yes -40 °C to 150 °C
A1102ELHLT-T 3-lead SOT Yes -40 °C to 85 °C
A1102EUA-T 3-pin SIP Yes -40 °C to 85 °C
A1102LLHLT-T 3-lead SOT Yes -40 °C to 150 °C
A1102LUA-T 3-pin SIP Yes -40 °C to 150 °C
A1103ELHLT-T 3-lead SOT Yes -40 °C to 85 °C
A1103EUA-T 3-pin SIP Yes -40 °C to 85 °C
A1103LLHLT-T 3-lead SOT Yes -40 °C to 150 °C
A1103LUA-T 3-pin SIP Yes -40 °C to 150 °C
A1104ELHLT-T 3-lead SOT Yes -40 °C to 85 °C
A1104EUA-T 3-pin SIP Yes -40 °C to 85 °C
A1104LLHLT-T 3-lead SOT Yes -40 °C to 150 °C
A1104LUA-T 3-pin SIP Yes -40 °C to 150 °C
A1106ELHLT-T 3-lead SOT Yes -40 °C to 85 °C
A1106EUA-T 3-pin SIP Yes -40 °C to 85 °C
A1106LLHLT-T 3-lead SOT Yes -40 °C to 150 °C
A1106LUA-T 3-pin SIP Yes -40 °C to 150 °C
A3141、A3142、A3143、A3144Complete Part Numbers
Part Number Package Type Temperature Comments
A3141ELT 3-lead SOT -40 °C to 85 °C discontinued
A3141ELTTR 3-lead SOT -40 °C to 85 °C discontinued
A3141EUA 3-pin SIP -40 °C to 85 °C discontinued
A3141LLT 3-lead SOT -40 °C to 150 °C discontinued
A3141LLTTR 3-lead SOT -40 °C to 150 °C discontinued
A3141LUA 3-pin SIP -40 °C to 150 °C discontinued
A3142ELT 3-lead SOT -40 °C to 85 °C discontinued
A3142ELTTR 3-lead SOT -40 °C to 85 °C discontinued
A3142EUA 3-pin SIP -40 °C to 85 °C discontinued
A3142LLT 3-lead SOT -40 °C to 150 °C discontinued
A3142LLTTR 3-lead SOT -40 °C to 150 °C discontinued
A3142LUA 3-pin SIP -40 °C to 150 °C discontinued
A3143ELT 3-lead SOT -40 °C to 85 °C discontinued
A3143ELTTR 3-lead SOT -40 °C to 85 °C discontinued
A3143EUA 3-pin SIP -40 °C to 85 °C discontinued
A3143LLT 3-lead SOT -40 °C to 150 °C discontinued
A3143LLTTR 3-lead SOT -40 °C to 150 °C discontinued
A3143LUA 3-pin SIP -40 °C to 150 °C discontinued
A3144ELT 3-lead SOT -40 °C to 85 °C discontinued
A3144ELTTR 3-lead SOT -40 °C to 85 °C discontinued
A3144EUA 3-pin SIP -40 °C to 85 °C discontinued
A3144LLT 3-lead SOT -40 °C to 150 °C discontinued
A3144LLTTR 3-lead SOT -40 °C to 150 °C discontinued
A3144LUA 3-pin SIP -40 °C to 150 °C discontinued
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