as5043 austriamicrosystems, as5043 Datasheet
as5043
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as5043 Summary of contents
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... system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device. The AS5043 provides a digital 10-bit as well as a programmable analog output that is directly proportional to the angle of a magnet, rotating over the chip. ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 5 Pin Configuration Figure 2: AS5043 pin configuration SSOP16 Package = SSOP16 (16 lead Shrink Small Outline Package) Pin Symbol Type Description Magnet Field Magnitude RaNGe warning; active low, indicates that the magnetic 1 MagRngn DO_OD field strength is outside of the recommended limits ...
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... A small low cost diametrically magnetized (two-pole) standard magnet, centered over the chip, is used as the input device. The AS5043 senses the orientation of the magnetic field and calculates a 10-bit binary code. This code can be accessed via a Synchronous Serial Interface (SSI). In addition, the absolute ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 7 3. Operation The AS5043 operates either at 3.3V ±10 ±10%. This is made possible by an internal 3.3V Low- Dropout (LDO) Voltage regulator. The core supply voltage is always taken from the LDO output, as the internal blocks are always operating at 3.3V. ...
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... Distance decrease, GREEN range; Push- function. This state is dynamic and only active while the magnet Off enabled moving towards the chip. YELLOW Range: Magnetic field is ~ 25…45mT or ~75…135mT. The AS5043 may still be operated in this enabled range, but with slightly reduced accuracy. ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 9 Mode Input Pin The absolute angular position is sampled at a rate of 10.4kHz (t=96µs) in fast mode and at a rate of 2.6kHz (t=384µs) in slow mode. These modes are selected by pin MODE (#2). The mode input pin activates or deactivates an internal filter, which is used to reduce the digital jitter and consequently the analog output noise ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 11 Analog Output The analog output V provides an analog voltage that is out proportional to the angle of the rotating magnet and ratiometric to the supply voltage VDD5V (max.5.5V). It can source or sink currents up to ±1mA in normal operation (up to 66mA short circuit current). ...
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... AS5043 Programmable 360° Magnetic Angle Encoder Note: Figure 8 and are shown for 360° operation. See Table 5 (page 12) for further angular range programming options. 11.1.2 Diagnostic Output Mode Vref 100% 90% analog output voltage 10% 0% 0° 180° 90° Figure 9: Diagnostic Output Mode It is possible to enable the analog output permanently (it will not be switched off even if the magnetic field is out of range) ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 12 Programming the AS5043 After power-on, programming the AS5043 is enabled with the rising edge of CSn and Prog = logic high. 16 bit configuration data must be serially shifted into the OTP register via the Prog-pin. The first “CCW” bit is followed by the zero position data (MSB first) and the Analog Output Mode setting as shown in Table 5 ...
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... AS5043 Programmable 360° Magnetic Angle Encoder Figure 12: OTP programming hardware connection of AS5043 (shown with AS5043 demoboard) 12.1 Zero Position Programming The AS5043 allows easy assembly of the system, as the actual angle of the magnet does not need to be considered. By OTP programming, any position can be assigned as the new permanent zero position with an accuracy of 0.35° ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 12.2 Analog Mode Programming The analog output can be configured in many ways: It consists of three major building blocks, a digital range preselector, a 10-bit Digital-to-Analog-Converter (DAC) and an OP-AMP buffer stage. In the default configuration (all OTP bits = 0), the analog output is set for 360° operation, internal DAC reference (VDD5V/2), external OPAMP gain, 0-100% ratiometric to VDD5V. Shown below is a typical example for a 0° ...
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... In addition, the slope is mirrored at 180° for 45°- and 90°- modes and has a step response at 270° for the 180°-mode. This allows the AS5043 to be used in a variety of applications. In these three modes, the output remains ...
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... Therefore it is recommended that bits that are already programmed are set to “0” during a programming cycle. 12.4 Non-permanent Programming It is also possible to re-configure the AS5043 in a non- permanent way by overwriting the OTP register. This procedure is essentially a “Write Data” sequence (see Figure 10) without a subsequent OTP programming cycle. The “ ...
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... To put the AS5043 in Analog Readback Mode, a digital sequence must be applied to pins CSn, PROG and CLK as shown in Figure 15. The digital level for this pin depends on the supply configuration (3. ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 14 Alignment Mode The alignment mode simplifies centering the magnet over the chip to gain maximum accuracy and XY-alignment tolerance. This electrical centering method allows a wider XY- alignment tolerance (0.485mm radius) than mechanical centering (0.25mm radius eliminates the placement tolerance of the die within the IC package (+/- 0 ...
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... Figure 21: Arrangement of Hall sensor array on chip (principle) With reference to Figure 21, a diametrically magnetized permanent magnet is placed above or below the surface of the AS5043. The chip uses an array of Hall sensors to sample the vertical vector of a magnetic field distributed across the device package surface. The area of magnetic sensitivity is a circular locus of 1 ...
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... DAC and OP-Amp. The analog output will be 0V, when the magnetic field is out of range (all analog modes). 17.2 Power supply failure detection By software: If the power supply to the AS5043 is interrupted, the digital data read by the SSI will be all “0”s. Data is only valid, when bit OCF is high, hence a data stream with all “ ...
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... High Speed Operation 18.4.1 Sampling rate The AS5043 samples the angular value at a rate of 10.42k samples per second (ksps) in fast mode and 2.61ksps in slow mode. Consequently, a new reading is performed each 96µs. (fast mode) or 384µs (slow mode stationary position of the magnet, this sampling rate creates no additional error ...
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... Temperature 18.6.1 Magnetic temperature coefficient One of the major benefits of the AS5043 compared to linear Hall sensors is that it is much less sensitive to temperature. While linear Hall sensors require a compensation of the magnet’s temperature coefficients, the AS5043 automatically compensates for the varying magnetic field strength over temperature. The magnet’ ...
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Electrical Characteristics 19.1 Absolute Maximum Ratings (non operating) Stresses beyond those listed under “Absolute Maximum Ratings“ may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 19.3.2 CMOS input : Program Input (Prog) (operating conditions -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless amb otherwise noted) Parameter High level input voltage High level input voltage Low level input voltage Pull-down high level input current 19 ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 19.3.6 OPAMP output stage Parameter Symbol Min VDD5V Power Supply Range Parallel Load Capacitance CL Parallel Load Resistance RL Open Loop Gain A0 VosOP Offset Voltage RTI Output Range Low VoutL Output Range High VoutH 0.95 * VDD5V Isink current capability sink ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 19.5 Electrical System Specifications (operating conditions -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) amb unless otherwise noted) Parameter Symbol Resolution RES * Integral non-linearity (optimum) INL * opt Integral non-linearity (optimum) INL * temp Integral non-linearity INL * Differential non-linearity ...
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... AS5043 Programmable 360° Magnetic Angle Encoder Integral Non-Linearity (INL) is the maximum deviation between actual position and indicated position. Differential Non-Linearity (DNL) is the maximum deviation of the step length from one position to the next. Transition Noise (TN) is the repeatability of an indicated position. ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 20 Package Drawings and Markings 16-Lead Shrink Small Outline Package SSOP-16 AYWWIZZ AS5043 Dimensions mm inch Symbol Min Typ Max Min A 1.73 1.86 1.99 .068 A1 0.05 0.13 0.21 .002 A2 1.68 1.73 1.78 .066 b 0.25 0.315 0.38 .010 c 0.09 - 0.20 .004 D 6.07 6.20 6.33 .239 E 7.65 7.8 7.9 .301 E1 5.2 5.3 5.38 .205 e 0.65 .0256 K 0° - 8° 0° L 0.63 0.75 0.95 .025 ...
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... AS5043 Programmable 360° Magnetic Angle Encoder 22 Recommended PCB Footprint: 23 Revision History Revision Date Description 1.6 Oct.3, 2006 Update DAC parameters (19.3.5), definition of magnet thickness 1.5 Aug.14, 2006 Update I Update Programming Sequence Figure 11; Update Prog. Conditions 19.7 1.4 Apr. 04, 2006 Include new OTP feature: permanent enabling of analog output (see 11.1.2). ...