A1227LLHLT-T

A1225, A1227, and A1229 Hall-Effect Latch for High Temperature Operation Not for New Design These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: Septemer 3, 2018 Recommended Substitutions: For existing customer transition, and for new customers or new applications, use APS12230. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems 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 assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. A1225, A1227, and A1229 Hall-Effect Latch for High Temperature Operation FEATURES AND BENEFITS DESCRIPTION ▪ Symmetrical switchpoints ▪ Superior temperature stability ▪ Operation from unregulated supply ▪ Open-drain 25 mA output ▪ Reverse battery protection ▪ Activate with small, commercially available permanent magnets ▪ Solid-state reliability ▪ Small size ▪ Resistant to physical stress ▪ Enhanced ESD structures result in 8 kV HBM ESD performance without external protection components ▪ Internal protection circuits enable 40 V load dump compliance without external protection components These Hall-effect latches are extremely temperature-stable and stress resistant sensor ICs especially suited for operation over extended temperature ranges to 150°C. Superior hightemperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switchpoints that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter. The three basic devices (A1225, A1227, and A1229) are identical except for magnetic switchpoints. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger, and a buffered open-drain output to sink up to 25 mA. The on-board regulator permits operation with supply voltages of 3.8 to 24 V. PACKAGES: Not to scale 3-pin SOT23W (suffix LH) 3-pin SIP, matrix HD style (suffix UA) 3-pin SIP, chopper style (suffix UA) The first character of the part number suffix determines the device operating temperature range. Suffix L is for –40°C to 150°C. Two package styles provide magnetically optimized packages for most applications. Suffix LH is a 3-pin SOT23W surface-mount package; suffix UA is a 3-pin ultramini SIP for through-hole mounting. The packages are lead (Pb) free with 100% matte-tin leadframe plating. Functional Block Diagram Regulator VCC To All Subcircuits Hall Chopping Logic Clock / Logic VOUT AMP Anti-aliasing LP-Filter Tuned Filter GND A1225-DS, Rev. 7 MCO-0000458 September 30, 2019 A1225, A1227 and A1229 Hall-Effect Latch for High Temperature Operation SELECTION GUIDE Part Number Packing [1] Package A1225LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT-23W surface mount A1225LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT-23W surface mount Bulk, 500 pieces/bag 3-pin SIP through hole A1227LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT-23W surface mount A1227LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT-23W surface mount A1225LUA-T A1227LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole A1229LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT-23W surface mount A1229LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT-23W surface mount Bulk, 500 pieces/bag 3-pin SIP through hole A1229LUA-T [1] Contact Allegro™ Ambient Temperature, TA BRP(min) (G) BOP(max) (G) –40°C to 150°C –300 300 –40°C to 150°C –175 175 –40°C to 150°C –200 200 for additional packaging options. RoHS COMPLIANT ABSOLUTE MAXIMUM RATINGS Rating Unit Forward Supply Voltage Characteristic Symbol VCC 30 V Reverse Supply Voltage VRCC –30 V Output Off Voltage VOUT 30 V VROUT –0.5 V IOUT(SINK) 25 mA –40 to 150 °C Reverse Output Voltage Continuous Output Current Notes Operating Ambient Temperature TA Maximum Junction Temperature TJ(max) 165 °C Tstg –65 to 170 °C Storage Temperature Range L Pinout Diagrams Package LH Package UA 3 1 2 1 2 Terminal List Table Number Name Function LH UA 1 1 VCC 2 3 VOUT Output signal 3 2 GND Ground Input power supply 3 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 2 A1225, A1227 and A1229 Hall-Effect Latch for High Temperature Operation ELECTRICAL CHARACTERISTICS: Valid at TA = –40°C to 150°C, CBYPASS = 0.1 µF, VCC = 12 V, unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. [1] Max. Unit [2] 24 V ELECTRICAL CHARACTERISTICS Supply Voltage VCC Supply Current ICC Operating; TJ ≤ 165°C 3.8 B < BRP (Output off) – – 6 mA B > BOP (Output on) – – 6 mA Supply Zener Voltage VZ(sup) ICC = 9 mA, TA = 25°C 28 – – V Reverse Battery Current IZ(sup) VRCC = –28 V, TA = 25°C – – –5 mA – – 12 µs – HIGH – – – 400 – kHz – 175 400 mV Power-On Time [3] tPO Power-On State POS Chopping Frequency fchop B < BOP OUTPUT STAGE CHARACTERISTICS Output Saturation Voltage Output Leakage Current Output Rise Time [3][4] Output Fall Time [3][4] Output Zener Voltage VOUT(sat) IOUT = 20 mA IOFF VOUT = 24 V, B < BRP –