A1233 2 - Dual-Channel Hall-Effect Direction Detection Sensor IC FEATURES AND BENEFITS DESCRIPTION AEC-Q100 automotive qualified The A1233 is a dual-channel Hall-effect sensor IC ideal for Quality Managed (QM), ISO 26262:2011 compliant use in speed and direction sensing applications incorporating Precisely aligned dual Hall elements encoder ring-magnet targets. The A1233 provides various output Tightly matched magnetic switchpoints signals that indicate speed and direction of target rotation. The Speed and direction outputs Hall elements are both photolithographically aligned to better Individual Hall element outputs (L package) than 1 m. Maintaining accurate displacement between the two Output short-circuit protection active Hall elements eliminates the major manufacturing hurdle Operation from an unregulated power supply encountered in fine-pitch detection applications. The A1233 is Wide operating temperature range a highly sensitive, temperature-stable magnetic device ideal for Wide operating voltage range use in harsh automotive and industrial environments. Integrated EMC-ESD protection The Hall elements of the A1233 are spaced 1.63 mm apart, Superior temperature stability and industry-leading which provides excellent speed and direction information jitter performance through use of advanced chopper for small-geometry targets. Extremely low-drift amplifiers stabilization topology guarantee symmetry between the switches to maintain signal quadrature. An on-chip regulator allows the use of this device PACKAGES over a wide operating voltage range of 3.5 to 24 V. 4-pin SIP 8-pin SOIC End-of-line trimming of the Hall element switchpoints provides (suffix K) (suffix L) tight matching capability. The Allegro high-frequency chopper stabilization technique cancels offsets in each channel, providing stable operation over the full specified temperature and voltage ranges. Continued on the next page Not to scale Functional Block Diagram LDO Regulator VCC Programmable Trim L Package Only OUTA Output 2 Bit Channel A Drive Hall Element E1 Low- Amp Pass Filter DIR Direction Output Logic Drive SPD Output 2 Bit Drive Channel B Hall Element Low- E2 Amp Pass Filter L Package Only OUTB Output Drive GND A1233-DS, Rev. 3 October 12, 2018 MCO-0000313 Dynamic Offset Dynamic Offset Cancellation Cancellation Low Noise Signal Low Noise Signal Recovery RecoveryDual-Channel Hall-Effect Direction Detection Sensor IC A1233 DESCRIPTION (continued) The A1233 has integrated protection against transients on the supply and output pins and short-circuit protection on all outputs. The A1233 is available in a 4-pin SIP and a plastic 8-pin SOIC surface-mount package. Both packages are lead (Pb) free, with 100% matte-tin leadframe plating. SELECTION GUIDE 1 Part Number Package Packing T (C) A A1233LK-T 4-pin through hole SIP Bulk bag, 500 pieces/bag 40 to 150 A1233LLTR-T 8-pin surface mount SOIC Tape and reel, 3000 pieces/reel RoHS 1 COMPLIANT Contact Allegro for additional packing options. ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units 2 Supply Voltage V 26.5 V CC 2 Reverse Battery Voltage V 18 V RCC 2 Output Off Voltage V V V OUTPUT CC 2 Reverse Output Voltage V 0.5 V ROUT Reverse Output Current I 10 mA ROUT Output Sink Current I 30 mA OUTPUT(Sink) 3 Magnetic Flux Density B Unlimited Operating Ambient Temperature T Range L 40 to 150 C A Maximum Junction Temperature T 165 C J(max) Storage Temperature T 65 to 170 C stg 2 This rating does not apply to extremely short voltage transients such as Load Dump and/or ESD. Those events have individual rat- ings, specific to the respective transient voltage event. 3 Guaranteed by design. 2 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com