Allegro MicroSystems, Inc.
Marlborough, MA 01752
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Hall-Effect Latches come in various packaging options.
Produced with BiCMOS technology, A1210/1/2/3/4 feature Hall element geometries and low-offset amps that minimize noise and reduce residual offset voltage. Device programming, performed after packaging, ensures switchpoint accuracy by eliminating offsets that can be induced by package stress. Suited for computer/office, industrial, and automotive markets, switches are offered in 3-pin single...
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Stepper Motor Driver features built-in translator.
Offering DMOS outputs rated at 35 V and Ã-
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Hall-Effect Sensor is suited for 3.6-24 V.
Digital switch A3245 has omnipolar capability that eliminates requirement for signal conditioning as well as need for magnet orientation for position sensing applications during manufacturing. Product incorporates voltage regulator, Hall-voltage generator, and small-signal amplifier in addition to chopper stabilization, Schmitt trigger, and short-circuit-protected open-collector output. Unit also...
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DMOS Microsteppping Drivers have built-in translator.
With output ratings of 35 V and 1.5 A, A3983 and A3984 operate bipolar stepper motors in full-, half-, quarter-, eighth- (A3983), and sixteenth- (A3984) step modes. They combine STEP and DIRECTION interface with 7.8 x 6.4 mm eTSSOP package and feature internal synchronous rectification control circuitry as well as fixed off-time PWM current regulator. Products also provide internal circuit...
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Speed Sensor incorporates self-calibrating feature.
Supplied in SE package, ATS673/4LSE Gear-Tooth Sensor is designed to operate with True Power-On State (TPOS) recognition. It incorporates single-element Hall-effect sensor as well as signal-processing circuitry that switches in response to changing magnetic signals created by rotating ferrous targets. Digital tracking of analog signal is used to set switching threshold of device. Sensor is...
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Integrated Circuits suit switched mode power supplies.
Series STR-A6100 is designed for power supplies with output power up to 20 W at universal input or 24 W at 230 Vac. Auto-standby function reduces input power consumption to less than 50 mW at 230 Vac by burst-mode operation, which is stabilized by auto-bias function. Series STR-W67xx includes quasi-resonant topology ICs in fully molded TO-220 package that contains controller chip and MOSFET....
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Linear Hall-Effect Sensors are field-programmable.
With modified 4-lead SIP package, one-time field-programmable A1373 and A1374 feature low-noise ratiometric outputs. Chopper stabilization technique used in Hall element provides low initial offset and minimal drift over temperature. Programmable on output pin, user can set gain, quiescent voltage output, and temperature coefficient after finished sensor assembly. Post-assembly programming...
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Multi-Output Regulator suits automotive applications.
Targeted for use in under-hood environments in 14 or 24 V automotive systems, A8450 incorporates controlled power-up sequencing and power-on-reset functionality as well as fault detection and reporting. IC features 4 regulator outputs: 2 low-voltage outputs that provide DSP or microprocessor core and I/O voltages, and 2 linear 5 V tracking regulators. Both feature current foldback circuitry....
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Hall-Effect Current Sensor has integrated current path.
Available in 15 and 5 A versions, SOICS-packaged Model ACS704 determines bi-directional ac or dc currents by using Hall-effect magnetic sensor to measure field generated by current flow. Because there is no electrical connection between current path and sensing circuit, unit provides minimum of 800 V of isolation without additional components. With 1.5 mohm resistance, sensor operates from single...
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Boost DC-DC Converter IC drives white LEDs in series.
Non-inverting Model A8430 provides programmable constant current output at up to 36 V, which is set with external resistor, and can be varied with PWM signal or control voltage at top of sense resistor when dimming control is required. With input voltage of 2.5-10 V, unit drives up to 5 LEDs at 20 mA from 3.0 V supply. Switching frequency of 1.2 MHz allows use of small external components. Model...
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