A3213 and A3214 Micropower Ultra-Sensitive Hall-Effect Switches FEATURES AND BENEFITS DESCRIPTION AEC-Q100 automotive qualified The A3213 and A3214 integrated circuits are ultra-sensitive, Micropower operation pole-independent Hall-effect switches with a latched digital Operate with north or south pole output. They are especially suited for operation in battery- 2.4 to 5.5 V battery operation operated, hand-held equipment such as cell and cordless Chopper stabilized telephones and palmtop computers. A 2.4 to 5.5 V operation Superior temperature stability and a unique clocking scheme reduce the average operating Extremely low switchpoint drift power requirements: the A3213 to 825 W, the A3214 to Insensitive to physical stress 14 W (typical, at 2.75 V). Except for operating duty cycle High ESD protection and average operating current, the A3213 and A3214 are Solid-state reliability identical. Small size Unlike other Hall-effect switches, either a north or south Easily assembly into applications due to magnetic pole pole of sufficient strength will turn the output on in the independence absence of a magnetic field, the output is off. The polarity independence and minimal power requirement allows these Packages: devices to easily replace reed switches for superior reliabil- ity and ease of manufacturing, while eliminating the require- 3 pin surface mount 3 lead ultramini SIP ment for signal conditioning. SOT23-W (suffix LH) (suffix UA) Improved stability is made possible through chopper sta- bilization (dynamic offset cancellation), which reduces the residual offset voltage normally caused by device overmold- ing, temperature dependencies, and thermal stress. Continued on the next page Not to scale SUPPLY SWITCH TIMING LOGIC OUTPUT X GROUND Dwg. FH-020-5 Functional Block Diagram 27622.62-DS Rev. 27 DYNAMIC OFFSET CANCELLATION SAMPLE & HOLD LATCHA3213 and Micropower Ultra-Sensitive Hall-Effect Switches A3214 Description (continued) These devices include, on a single silicon chip, a Hall-voltage Devices are rated for operation over a temperature range of generator, small-signal amplifier, chopper stabilization, a latch, 40C to 85C or 40C to 150C. Two package styles provide a and a MOSFET output. Advanced BiCMOS processing is used magnetically optimized package for most applications. LH is a to take advantage of low-voltage and low-power requirements, miniature low-profile surface-mount package, UA is a three- component matching, very low input-offset errors, and small lead SIP for through-hole mounting. Each package is lead (Pb) component geometries. free (suffix, T) , with a 100% matte-tin-plated leadframe. SPECIFICATIONS Product Selection Guide Ambient*, T DC I (typ) A DD(AVG) Part Number Mounting Packing* (C) (%) (A) LH package 7-in. reel A3213ELHLT-T Surface Mount 3000 pieces/reel LH package 13-in. reel A3213ELHLX-T 40 to 85 Surface Mount 10000 pieces/reel 25 309 UA package Bulk A3213EUA-T SIP through hole 500 pieces/bag UA package Bulk A3213LUA-T 40 to 150 SIP through hole 500 pieces/bag LH package 7-in. reel A3214ELHLT-T Surface Mount 3000 pieces/reel LH package 13-in. reel A3214ELHLX-T 40 to 85 0.10 6 Surface Mount 10000 pieces/reel UA package Bulk A3214EUA-T SIP through hole 500 pieces/bag *Contact Allegro for additional packing and operating temperature range options Absolute Maximum Ratings Characteristic Symbol Notes Rating Units Supply Voltage V 6 V DD Magnetic Flux Density B Unlimited G Output Off Voltage V 6 V OUT Output Current I 1 mA OUT Range E 40 to 85 C Operating Ambient Temperature T A Range L 40 to 150 C Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com