A3291KUA-T Allegro

A3290 and A3291 Chopper-Stabilized, Precision Hall-Effect Latches for Consumer and Industrial Applications FEATURES AND BENEFITS DESCRIPTION Symmetrical switchpoints The A3290 and A3291 Hall-effect latches are extremely Resistant to physical stress temperature-stable and stress-resistant sensor ICs, especially Superior temperature stability suited for operation over extended temperature ranges (up Output short-circuit protection to 125C). Superior high-temperature performance is made Operation from unregulated supply possible through dynamic offset cancellation, which reduces Reverse battery protection the residual offset voltage normally caused by device package Solid-state reliability overmolding, temperature dependencies, and thermal stress. The Small package size two devices are identical except for their magnetic switchpoints. They are not intended for automotive applications. Both devices include, on a single silicon chip, a voltage regulator, a Hall voltage generator, a small-signal amplifier, chopper stabilization, a Schmitt trigger, and a short-circuit protected PACKAGES: open-drain output to sink up to 25 mA. A south polarity magnetic Not to scale field of sufficient strength is required to turn the output on. A north polarity field of sufficient strength is necessary to turn the output off. An onboard regulator permits operation with supply voltages in the range of 3 to 24 V. NOT FOR Two package styles provide a magnetically optimized package NEW DESIGN for most applications: type LH is a miniature SOT23W low- profile surface-mount package, and type UA is a three-pin ultramini SIP for through-hole mounting. Both packages are 3-pin SOT23W lead (Pb) free with 100% matte-tin leadframe plating. (suffix LH) 3-pin SIP, 3-pin SIP, matrix HD style chopper style (suffix UA) (suffix UA) VCC Regulator OUT Low-Pass Filter Amp Control Current Limit 1 GND Functional Block Diagram A3290-DS, Rev. 17 September 21, 2017 MCO-0000307 Dynamic Offset Cancellation Sample and HoldA3290 and Chopper-Stabilized, Precision Hall-Effect Latches A3291 for Consumer and Industrial Applications SPECIFICATIONS SELECTION GUIDE 2 Magnetic Switchpoints 1 Part Number Packing Package Type Operate, B Release, OP (G) B (G) RP A3290KLHLT-T 3000 pieces per 7-in. reel Surface-mount SOT23W A3290KLHLX-T 10000 pieces per 13-in. reel Surface-mount SOT23W 5 to 50 50 to 5 3 A3290KUA-T 500 pieces per bulk bag Through-hole ultramini SIP A3291KLHLT-T 3000 pieces per 7-in. reel Surface-mount SOT23W A3291KLHLX-T 10000 pieces per 13-in. reel Surface-mount SOT23W 10 to 100 100 to 10 A3291KUA-T 500 pieces per bulk bag Through-hole ultramini SIP 1 Contact Allegro for additional packing options. 2 Algebraic convention used: (+) south polarity, () north polarity. 3 The chopper-style UA package is not for new design the matrix HD style UA package is recommended for new designs. ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units Supply Voltage V 26.5 V CC Reverse Battery Voltage V 30 V RCC Output Off Voltage V 26 V OUT Device provides internal current limiting to help protect itself Continuous Output Current I 25 mA OUT from output short circuits Reverse Output Current I 50 mA ROUT Magnetic Flux Density B Unlimited G Operating Ambient Temperature T Range K 40 to 125 C A Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg 3 Terminal List Number Name Function PTCT PTCT LH UA VCC 1 1 Power supply 1 2 OUT 2 3 Output 1 2 3 GND 3 2 Ground Package LH, Package UA, 3-Pin SOT23W Pinout 3-Pin SIP Pinout Diagram Diagram Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com