AS5304/AS5306 Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection The AS5304/AS5306 are single-chip ICs with integrated Hall General Description elements for measuring linear or rotary motion using multi-pole magnetic strips or rings. This allows the usage of the AS5304/AS5306 in applications where the Sensor IC cannot be mounted at the end of a rotating device (e.g. at hollow shafts). Instead, the AS5304/AS5306 are mounted off-axis underneath a multi-pole magnetized ring or strip and provides a quadrature incremental output with 40 pulses per pole period at speeds of up to 20 meters/second (AS5304) or 12 meters/second (AS5306). A single index pulse is generated once for every pole pair at the Index output. Using, for example, a 32pole-pair magnetic ring, the AS5304/AS5306 can provide a resolution of 1280 pulses/revolution, which is equivalent to 5120 positions/revolution or 12.3bit. The maximum speed at this configuration is 9375 rpm. The pole pair length is 4mm (2mm north pole / 2mm south pole) for the AS5304, and 2.4mm (1.2mm north pole / 1.2mm south pole) for the AS5306. The chip accepts a magnetic field strength down to 5mT (peak). Both chips are available with push-pull outputs (AS530xA) or with open drain outputs (AS530xB). The AS5304/AS5306 are available in a small 20-pin TSSOP package and specified for an operating ambient temperature of -40C to 125C. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v2-00 2017-May-03 Document FeedbackAS5304/ AS 5306 Ge ne r a l De s c ri p t i o n Key Benefits and Features The benefits and features of this device are listed below: Figure 1: Added Value of Using AS5304/AS5306 Benefits Features Contactless motion and position sensing Highest reliability and durability in harsh environments High speed measurement Control of high speed movements Robust against external magnetic stray fields Lower material cost (no magnetic shielding needed) High speed, up to 20m/s (AS5304), 12m/s (AS5306) Magnetic pole pair length: 4mm (AS5304) or 2.4mm (AS5306) Resolution: 25m (AS5304) or 15m (AS5306) 40 pulses / 160 positions per magnetic period 1 index pulse per pole pair Linear movement measurement using multi-pole magnetic strips Circular off-axis movement measurement using multi-pole magnetic rings 4.5V to 5.5V operating voltage Magnetic field strength indicator, magnetic field alarm for end-of-strip or missing magnet Applications The AS5304 and AS5306 are ideal for high speed linear motion and off-axis rotation measurement in applications, such as electrical motors, X-Y-stages, rotation knobs, and industrial drives. Page 2 ams Datasheet Document Feedback v2-00 2017-May-03