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AS5304 Dataheets PDF



Part Number AS5304
Manufacturers ams
Logo ams
Description Integrated Hall
Datasheet AS5304 DatasheetAS5304 Datasheet (PDF)

General Description AS5304/AS5306 Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection The AS5304/AS5306 are single-chip ICs with integrated Hall 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 str.

  AS5304   AS5304



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General Description AS5304/AS5306 Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection The AS5304/AS5306 are single-chip ICs with integrated Hall 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 (AS5304A) 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 -40°C to 125°C. Ordering Information and Content Guide appear at end of datasheet. Datasheet, Public [v3-00] 2022-Jan-24 Page 1 Document Feedback AS5304/AS5306− GeneralDescription Key Benefits and Features The benefits and features of this device are listed below: Figure 1: Added Value of Using AS5304/AS5306 Benefits • Contactless motion and position sensing • High speed measurement • Robust against external magnetic stray fields Features • Highest reliability and durability in harsh environments • Control of high speed movements • 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: 25μm (AS5304) or 15μm (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 Document Feedback Datasheet, Public [v3-00] 2022-Jan-24 AS5304/AS5306 − General Description Figure 2: Functional Blocks of the AS5304/06 Block Diagram The functional blocks of the AS5304 and AS5306 are shown below: S IN Hall Array & Frontend Amplifier CO S SIN Signal Processing & Channel Amplifier C OS Automatic Gain Control AS5304 / AS5306 ADC & DSP magnetic field alarm A/ B Quadrature Incremental Interface & Index Analog Output A B Index AO Datasheet, Public [v3-00] 2022-Jan-24 Page 3 Document Feedback Pin Assignments Figure 3: Pin Assignments (Top View) VSS 1 A 2 VDDP 3 B 4 TEST 5 AO 6 VDD 7 INDEX 8 NC 9 NC 10 AS5304 / AS5306 AS5304/AS5306 − Pin Assignments 20 ZPZ 19 TEST 18 TEST 17 TEST 16 VDDA 15 TEST_GND 14 TEST 13 TEST 12 TEST 11 NC Figure 4: Pin Description Pin Number Pin Name Pin Type Description 1 VSS Supply pin Supply ground 2 A Digital output push pull or Incremental quadrature position output A. open drain (programmable) Short circuit current limitation 3 VDDP Supply pin Peripheral supply pin, connect to VDD 4 B Digital output push pull or Incremental quadrature position output B. open drain (programmable) Short Circuit Current Limitation 5,12,13, 14,17,18,19 6 TEST AO Analog input/output Analog output Test pins, must be left open AGC Analog Output. (Used to detect low magnetic field strength) 7 VDD Supply pin Positive supply pin 8 Index Digital output push pull or Index output, active HIGH. Short Circuit open drain (programmable) Current Limitation Page 4 Document Feedback Datasheet, Public [v3-00] 2022-Jan-24 AS5304/AS5306 − Pin Assignments Pin Number 9,10,11 15 16 20 Pin Name Pin Type TEST TEST_GND VDDA Hall ZPZmskdis Analog input/output Supply pin Digital input Description Test pins, must be left open Test pin, must be connected to VSS Hall Bias Supply Support (connected to VDD) Test input, connect to VSS during operation Datasheet, Public [v3-00] 2022-Jan-24 Page 5 Document Feedback AS5304/AS5306− AbsoluteMaximumRatings Absolute Maximum Ratings Figure 5: Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratin.


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