AMR 4-Pin Quadrature Sensor Integrated Circuit 32336294 VM821Q1 Issue D Datasheet FEATURES Integrated quadrature sensor IC Pole size independent operation 4-pin quadrature, open collector outputs -40C to 150C operating temperature range Zero speed operation No calibration required Insensitive to mechanical vibration Protection against reverse polarity and short circuit POTENTIAL APPLICATIONS Industrial speed and direction and position feedback Encoders Conveyer rollers speed, process line speed and direction DESCRIPTION Gearbox output speed Honeywells Anisotropic Magnetoresistive (AMR) 4-Pin Positioning roller speed and direction Quadrature Sensor Integrated Circuit (IC) is designed to Garage door opening systems detect the speed and direction and position of a ring magnet Induction motors encoder target using a unique* bridge design. The frequency Fan speed systems of the output is proportional to the rotational speed of the Electric actuated blind position target, and the rotational direction is encoded by the phase Pumps and compressors between the outputs. The sensor IC works over a wide range Integrated seals and bearings of speeds, temperatures and air gaps. PORTFOLIO VALUE TO CUSTOMERS The Honeywell VM821Q1 AMR 4-Pin Quadrature Sensor IC The VM821Q1 sensor IC has a higher sensitivity AMR bridge joins the following related products: array that operates with a larger airgap than Hall-effect sensor ICs, which allows for enhanced design flexibility and VM421D1 AMR 3-Pin PWM Speed and Direction Sensor IC assembly tolerances. The sensor IC has been optimized to VM721D1 AMR 2-Pin PWM Speed and Direction Sensor IC provide an output that is not affected by target runout or sudden air gap changes. It is insensitive to magnet pole size, VM721V1 AMR 2-Pin Speed Sensor IC allowing one sensor to be paired with different ring magnet applications. DIFFERENTIATION Honeywells unique solution utilizes the AMR bridge in saturation, which provides a more stable output response when the system has vibration, sudden air gap changes, or target runout without requiring complex magnitude compensation algorithms. The AMR signal has greater sensitivity than Hall-effect sensor ICs, and does not require automatic gain control or chopper stabilization that can lead to increased jitter over the operating range. *Patent Pending Sensing and Internet of ThingsAMR 4-Pin Quadrature Sensor IC VM821Q1 Table 1. Operating Characteristics (At 4.0 V V 24 V, -40C T 150C, unless otherwise specified.) S A Characteristic Symbol Condition Min. Typ. Max. Unit Supply voltage V 4.0 24 V S Supply current I 20 mA CC Output low V V = 5 V, I = 5 mA 400 mV sat ol S Output leakage I V = 24 V 10 A oh oh Output current I 20 mA ol Duty cycle 2 mm pole width 40 50 60 % Phase 2 mm pole width 70 90 110 Output switching time: rise time t Vs = 5 V, R = 1 kOhm to 5 V, C = 20 pF 1.5 r L L s fall time t Vs = 5 V, R = 1 kOhm to 5 V, C = 20 pF 1.5 L L f Switching frequency f 35 kHz Table 2. Output Configuration Characteristic Condition Configuration Number of pulses per pole 1 Phase polarity rotation from pin 4 to pin 1 as shown in Figure 4. output A leads B Table 3. Application Requirements (At 4.0 V V 24 V, -40C T 150C.) S A Characteristic Symbol Condition Min. Typ. Max. Unit Magnetic flux B D , max. air gap, max. temp 30 Gauss max Magnetic flux with valid direction indication, B D , max. air gap, max. temp 10 Gauss max increased jitter Metering resistor R 50 160 Ohm Table 4. Absolute Maximum Ratings Characteristic Symbol Condition Min. Typ. Max. Unit Operating temperature T -40 -40 150 302 C F a Junction temperature T -40 -40 165 329 C F J Storage temperature T -40 -40 150 302 C F s Thermal resistance R C/W qJA Supply voltage V -26.5 26.5 V S Soldering temperature 3 s max. 260 500 C F ESD (HBM) V JEDEC JS-002-2014 6 kV ESD Output short circuit with no current limiting resistor 24 V CAUTION NOTICE ELECTROSTATIC Absolute maximum ratings are the extreme limits the device will momentarily withstand SENSITIVE DEVICES without damage to the device. Electrical and mechanical characteristics are not DO NOT OPEN OR HANDLE guaranteed if the rated voltage and/or currents are exceeded, nor will the device EXCEPT AT A STATIC FREE WORKSTATION necessarily operate at absolute maximum ratings. ESD SENSITIVITY: CLASS 3 2 Sensing and Internet of Things