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A1201 Dataheets PDF



Part Number A1201
Manufacturers Allegro MicroSystems
Logo Allegro MicroSystems
Description Continuous-Time Bipolar Switch
Datasheet A1201 DatasheetA1201 Datasheet (PDF)

A1201 Continuous-Time Bipolar Switch 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 PACKAGES: Not to scale 3-pin SOT23W (suffix LH) NOT FOR NEW DESIGN 3-pin SIP, matrix HD style (suffix .

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A1201 Continuous-Time Bipolar Switch 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 PACKAGES: Not to scale 3-pin SOT23W (suffix LH) NOT FOR NEW DESIGN 3-pin SIP, matrix HD style (suffix UA) 3-pin SIP, chopper style (suffix UA) DESCRIPTION The Allegro A1201 Hall-effect bipolar switch is a nextgeneration replacement and extension of the popular Allegro A3134 bipolar switch. Overall, the A1201, produced with BiCMOS technology, is a continuous-time device that features 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 lowoffset amplifiers help to minimize noise and to reduce the residual offset voltage normally caused by device overmolding, temperature excursions, and thermal stress. TheA1201 Hall-effect bipolar switch includes 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 motor commutation applications, without adding external components. The device is a member of the A1201 product family which has identical electrical characteristics throughout, but provides a range of magnetic switchpoints. Continued on the next page… VCC A1201-DS, Rev. 15 Functional Block Diagram Regulator To all subcircuits Amp Gain Offset Trim Control VOUT GND November 4, 2016 A1201 Continuous-Time Bipolar Switch DESCRIPTION (CONTINUED) 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 a SOT23W, a miniature low-profile surface-mount package, while package UAis a three-lead ultramini SIPfor throughhole mounting. Each package is lead (Pb) free, with 100% matte tin plated leadframes. SELECTION GUIDE Part Number A1201ELHLT-T [2] A1201EUA-T [2][3] A1201LLHLT-T [2] A1201LUA-T [2][3] Packing [1] 7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag 7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag Mounting 3-pin SOT23W surface mount 3-pin SIP through hole 3-pin SOT23W surface mount 3-pin SIP through hole Ambient, TA (°C) BRP (Min) (G) –40 to 85 –40 to 150 –50 1 Contact Allegro for additional packing options. 2 Variant is obsolete. 3 The chopper-style UA package is not for new design; the matrix HD style UA package is recommended for new designs. BOP (Max) (G) 50 ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Supply Voltage Reverse Supply Voltage Output Off Voltage Reverse Output Voltage Output Current Sink Magnetic Flux Density VCC VRCC VOUT VROUT IOUTSINK B Operating Ambient Temperature Maximum Junction Temperature Storage Temperature TA TJ(max) Tstg Range E Range L Notes Rating 30 –30 30 –0.5 25 Unlimited –40 to 85 –40 to 150 165 –65 to 170 Units V V V V mA G °C °C °C °C Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 A1201 Continuous-Time Bipolar Switch PINOUT DIAGRAMS AND TERMINAL LIST TABLE GND Package LH 3 Package UA 12 12 3 VCC GND VOUT VCC VOUT Terminal List Name Description VCC VOUT GND Connects power supply to chip Output from circuit Ground Number Package LH Package UA 11 23 32 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 3 A1201 Continuous-Time Bipolar Switch OPERATING CHARACTERISTICS: Over full operating voltage and ambient temperature ranges, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ. Max. ELECTRICAL CHARACTERISTICS Supply Voltage [1] Output Leakage Current Output On Voltage Power-On Time [2] Output Rise Time [3] Output Fall Time [3] Supply Current Reverse Battery Current VCC IOUTOFF VOUT(SAT) tPO tr tf ICCON ICCOFF IRCC Operating, TJ < 165°C VOUT = 24 V, B < BRP IOUT = 20 mA, B > BOP Slew rate (dVCC/dt) < 2.5 V/μs, B > BOP(max) + 5 G or B < BRP(min) – 5 G VCC = 12 V, RLOAD = 820 Ω, CS = 12 pF VCC = 12 V, RLOAD = 820 Ω, CS = 12 pF B > BOP B < BRP VRCC = –30 V 3.8 – 24 – – 10 – 215 400 ––4 ––2 ––2 – 3.8 7.5 – 3.5 7.5 – – –10 Supply Zener Clamp Voltage VZ ICC = 30 mA; TA = 25°C 32 – – Supply Zener Current [4] MAGNETIC CHARACTERISTICS [5] .


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