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Resumen del manual
The device should not be purchased for new design applications. Samples are no longer available. Date of status change: October 31, 2011 • for the A1321EUA-T and the A1321LUA-T use the A1324LUA-T • for the A1321ELHLT-T and the A1321LLHLT-T use the A1324LLHLX-T • for the A1322LUA-T use the A1325LUA-T • for the A1322LLHLT-T use the A1325LLHLX-T • for the A1323EUA-T and the A1323LUA-T use the A1326LUA-T • for the A1323LLHLT-T use the A1326LLHLX-T NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements ofpatents or other rights of third parties which may result from its use. MicroSystems, Inc. A1321, A1322, andA1323 Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Features and Benefits ■ Temperature-stable quiescent output voltage ■ Precise recoverability after temperature cycling ■ Output voltage proportional to magnetic flux density ■ Ratiometric rail-to-rail output ■ Improved sensitivity ■ 4.5 to 5.5 V operation ■ Immunity to mechanical stress ■ Solid-state reliability ■ Robust EMC protection Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA) Not to scale Description The A132X family of linear Hall-effect sensor ICs are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensor ICs provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5 mV/G, 3.125 mV/G, and 5m V/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems. Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-impedance output stage. A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise Continued on the next page... Functional Block Diagram A1321-DS, Rev. 23 A1321, A1322, and A1323 Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Description (continued) recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtainedby internal gain and offset trim adjustments made at end-of-line during the manufacturing process. The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH). Each package is available in a lead (Pb) free version (suffix, -T) , with a 100% matte tin plated leadframe. Selection Guide Part Number Packing1 Mounting Ambient, TA (°C) Sensitivity, Typ. (mV/G) A132lEtHtT-T2^^ 7-in. reel, 3000 pieces/reel Surface Mount -40 to 85 5.000 Bulk, 500 pieces/bag SIP through hole A132TLtHtT-T2^^ 7-in. reel, 3000 pieces/reel Surface Mount -40 to 150 ÄT32TtüAT^__^ Bulk, 500 pieces/bag SIP through hole AT322ttHtT-T2^^ 7-in. reel, 3000 pieces/reel Surface Mount -40 to 150 3.125 Xl322tUA-T3^^^ Bulk, 500 pieces/bag SIP through hole Ä1323EÜA=T2^^^ Bulk, 500 pieces/bag SIP through hole -40 to 85 2.500 ÀT323rtHtT-T2^^ 7-in. reel, 3000 pieces/reel Surface Mount -40 to 150 A1323rüA=T3^^^ Bulk, 500 pieces/bag SIP through hole 1Contact Allegro for additional packing options. 2This variant is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase. Status change: January 31, 2011. Suggested replacements: for the A1321ELHLT-T and the A1321LLHLT-T use the A1324LLHLX-T, for the A1322LLHLT-T use the A1325LLHLX-T, and for the A1323LLHLT-T use the A1326LLHLX-T. 3Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently restricted to existing customer applications. The variant should not ...