AS5145-HSST austriamicrosystems, AS5145-HSST Datasheet
AS5145-HSST
Specifications of AS5145-HSST
Related parts for AS5145-HSST
AS5145-HSST Summary of contents
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... This digital data is available as a serial bit stream and as a PWM signal. An internal voltage regulator allows the AS5145 to operate at either 3. supplies. 2 Key Features Contact less high resolution rotational position encoding over a ...
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... Daisy Chain Mode ..................................................................................................................................................................... 16 8.2 Pulse Width Modulation (PWM) Output.............................................................................................................................................. 17 8.2.1 Changing the PWM Frequency.................................................................................................................................................. 18 8.3 Analog Output..................................................................................................................................................................................... 18 9 Application Information ........................................................................................................................................................... 9.1 Programming the AS5145 .................................................................................................................................................................. 19 9.1.1 Zero Position Programming ....................................................................................................................................................... 19 9.1.2 OTP Memory Assignment.......................................................................................................................................................... 20 9.1.3 User Selectable Settings ........................................................................................................................................................... 20 9.1.4 OTP Default Setting................................................................................................................................................................... 21 9 ...
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... AS5145 Data Sheet - 9.7.7 Accuracy over Temperature ...................................................................................................................................................... 30 9.8 AS5145 Differences to AS5045.......................................................................................................................................................... 30 10 Package Drawings and Markings ......................................................................................................................................... 10.1 Recommended PCB Footprint.......................................................................................................................................................... 33 11 Ordering Information ............................................................................................................................................................. www.austriamicrosystems.com/AS5145 Revision 1. ...
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... MagDECn 3 DTest1_A 4 DTest2_B Mode_Index PDIO CLK 11 CSn 12 PWM 13 NC www.austriamicrosystems.com/AS5145 VSS 8 9 PDIO Description Magnet Field Magnitude INCrease; active low, indicates a distance reduction between the magnet and the device surface. (see Table 9) Magnet Field Magnitude DECrease; active low, indicates a distance increase between the device and the magnet ...
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... Pin 11 Chip Select (CSn; active low) selects a device within a network of AS5145 encoders and initiates serial data transfer. A logic high at CSn puts the data output pin (DO) to tri-state and terminates serial data transfer. This pin is also used for alignment mode ...
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... Table 2. Absolute Maximum Ratings Parameter DC supply voltage at pin supply voltage at pin V 3V3 DD Input pin voltage Input current (latchup immunity) Electrostatic discharge Storage temperature Package Body temperature Humidity non-condensing www.austriamicrosystems.com/AS5145 Section 6 Electrical Characteristics on page 7 Min Max Units -0 -0 ...
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... Low level input voltage IL I High level input current iL DC Characteristics CMOS Output Open Drain: MagINCn, MagDECn I Open drain leakage current OZ V Low level output voltage OL www.austriamicrosystems.com/AS5145 5V = 4.5-5.5V (5V operation) unless otherwise noted. DD Condition 5V Operation 3.3V Operation (pin V 5V and V 3V3 connected supply voltage 3.3V (V ...
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... V AMB DD Two-pole cylindrical diametrically magnetized source: Table 4. Magnetic Input Specification Symbol Parameter d Diameter mag t Thickness mag B Magnetic input field amplitude pk B Magnetic offset off Field non-linearity Input frequency f mag_abs (rotational speed of magnet) www.austriamicrosystems.com/AS5145 Condition V 5V 5V 5V 5V: 4. ...
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... S output: Internal sampling rate for absolute f S output CLK/SEL Read-out frequency www.austriamicrosystems.com/AS5145 Condition Max. offset between defined device center and magnet axis (see Figure 19) Eccentricity of magnet center to rotational axis NdFeB (Neodymium Iron Boron) SmCo (Samarium Cobalt 4.5 to 5.5V (5V operation) unless otherwise noted. ...
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... 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. www.austriamicrosystems.com/AS5145 Actual curve TN Ideal curve DNL+1LSB INL 0.35° ...
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... CHARGE f LOAD frequency LOAD f READ frequency READ f WRITE frequency WRITE www.austriamicrosystems.com/AS5145 5V = 4.5 to 5.5V (5V operation), unless otherwise noted. DD Conditions Min Time between falling edge of CSn and data output activated Time between falling edge of CSn and 500 first falling edge of CLK Rising edge of CLK shifts out one bit at a ...
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... Figure 18). The AS5145 senses the orientation of the magnetic field and calculates a 12-bit binary code. This code can be accessed via a Synchronous Serial Interface (SSI). In addition, an absolute angular representation is given by a Pulse Width Modulated signal at pin 12 (PWM). This PWM signal output also allows the generation of a direct proportional analog voltage, by using an external Low-Pass-Filter. The AS5145 is tolerant to magnet misalignment and magnetic stray fields due to differential measurement technique and Hall sensor conditioning circuitry ...
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... Even Parity bit for transmission error detection of bits 1…17 (D11…D0, OCF, COF, LIN, MagINC, MagDEC) Placing the magnet above the chip, angular values increase in clockwise direction by default. Data D11:D0 is valid, when the status bits have the following configurations: Table 8. Status Bit Outputs OCF COF 1 0 Note: MagInc=MagDec=1 is only recommended in YELLOW mode www.austriamicrosystems.com/AS5145 ...
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... Incremental Mode The AS5145 has an internal interpolator block. This function is used if the input magnetic field is to fast and a code position is missing. In this case an interpolation is done. With the OTP bits OutputMd0 and OutputMd1 a specific mode can be selected. For the available pre-programmed incremental versions (10bit and 12bit), these bits are set during test at austriamicrosystems ...
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... Instead of waiting for the specified maximum power up-time (0), the controller can start requesting data from the AS5145 as soon as the state (A=B=Index = high) is cleared. CSn = high or open at power-up: In this mode, the incremental outputs (A, B, Index) will remain at logic high state, until CSn goes low or a low pulse is applied at CSn ...
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... Daisy Chain Mode The Daisy Chain mode allows connection of several AS5145s in series, while still keeping just one digital input for data transfer (see “Data IN” in Figure 9). This mode is accomplished by connecting the data output (DO; pin 9) to the data input (PDIO; pin 8) of the subsequent device. The serial data of all connected devices is read from the DO pin of the first device in the chain ...
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... DO valid Angular Position Data 8.2 Pulse Width Modulation (PWM) Output The AS5145 provides a pulse width modulated output (PWM), whose duty cycle is proportional to the measured angle. For angle position 0 to 4094 Examples angle position of 180° will generate a pulse width ton = 2049µs and a pause toff of 2049 µs resulting in Position = 2048 after the cal- culation: 2049 * 4098 / (2049 + 2049 2048 2. An angle position of 359.8° ...
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... AS5145 Data Sheet - 8.2.1 Changing the PWM Frequency The PWM frequency of the AS5145 can be divided by two by setting a bit (PWMhalfEN) in the OTP register page 19). With PWMhalfEN = 0 the PWM timing is as shown in Table 11. PWM Signal Parameters (Default mode) Symbol Parameter f PWM frequency PWM ...
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... No temperature compensation necessary 9.1 Programming the AS5145 After power-on, programming the AS5145 is enabled with the rising edge of CSn with PDIO = high and CLK = low. The AS5145 programming is a one-time-programming (OTP) method, based on poly silicon fuses. The advantage of this method is that a programming voltage of only 3.3V to 3.6V is required for programming (either with 3. supply). ...
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... User Selectable Settings The AS5145 allows programming of the following user selectable options: - PWMhalfEN_Indexwidth: Setting this bit, the PWM pulse will be divided case of quadrature incremental mode A/B/Index setting of Index impulse width from 1 LSB to 3LSB - Output Md0: Setting this bit enables sync- or 10bit incrememantal mode ...
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... RA [4:0]: Redundant Address: an OTP bit location addressed by this address is always set to “1” independent of the corresponding origi- nal OTP bit setting 9.1.4 OTP Default Setting The AS5145 can also be operated without programming. The default, un-programmed setting is: - Output Md0, Output MD1: 00= Default mode - Z0 to Z11 programmed zero position ...
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... CSn Mode_Index 7 10 VSS CLK 8 9 PDIO DO 10n AS5145 2.2µF Cap only required for OTP programming www.austriamicrosystems.com/AS5145 OTP Access Figure 13. AS5145 Demoboard For programming, keep these 6 wires as short as possible! max. length = 2 inches (5cm) 7 PROG 6 CSN CLK 3 5VUSB 2 VDD3V3 1 VSS 22k *see Text Revision 1 ...
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... CSn 9.3 3. Operation The AS5145 operates either at 3.3V ±10 ±10%. This is made possible by an internal 3.3V Low-Dropout (LDO) Voltage regulator. The internal supply voltage is always taken from the output of the LDO, meaning that the internal blocks are always operating at 3.3V. For 3.3V operation, the LDO must be bypassed by connecting V ...
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... The magnetic field strength perpendicular to the die surface has the range of ±45mT…±75mT (peak). The magnet’s field strength should be verified using a gauss-meter. The magnetic field given distance, along a concentric circle with a radius of 1.1mm (R1), should be in the range of www.austriamicrosystems.com/AS5145 3.3V Operation VDD5V ...
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... Figure 18. Typical Magnet (6x3mm) and Magnetic Field Distribution 9.4.1 Physical Placement of the Magnet The best linearity can be achieved by placing the center of the magnet exactly over the defined center of the chip as shown in the drawing below: Figure 19. Defined Chip Center and Magnet Displacement Radius www.austriamicrosystems.com/AS5145 typ. 6mm diameter N S ...
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... AS5145 die A diametrically magnetized permanent magnet is placed above or below the surface of the AS5145. 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 1.1mm radius with respect to the center of the die. The Hall sensors in the area of magnetic sensitivity are grouped and configured such that orthogonally related components of the magnetic fields are sampled differentially ...
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... Power Supply Failure Detection By software: If the power supply to the AS5145 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 “0”s is invalid. To ensure adequate low levels in the failure case, a pull-down resistor (~10kΩ) should be added between pin DIO and VSS at the receiving side ...
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... The magnet used for this measurement was a cylindrical NdFeB (Bomatec® BMN-35H) magnet with 6mm diameter and 2.5mm in height. Figure 23. Example of Linearity Error Over 360º 0.5 0.4 0.3 0.2 0 109 163 217 -0.1 -0.2 -0.3 -0.4 -0.5 www.austriamicrosystems.com/AS5145 y Err max 271 325 379 433 487 541 595 649 Err min Revision 1.11 800 500 200 -100 ...
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... High Speed Operation Sampling Rate: The AS5145 samples the angular value at a rate of 2.61k (slow mode) or 10.42k (fast mode, selectable by pin MODE) samples per second. Consequently, the absolute outputs are updated each 384µs (96µs in fast mode stationary position of the mag- net, the sampling rate creates no additional error ...
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... Internal Timing Tolerance The AS5145 does not require an external ceramic resonator or quartz. All internal clock timings for the AS5145 are generated by an on-chip RC oscillator. This oscillator is factory trimmed to ±5% accuracy at room temperature (±10% over full temperature range). This tolerance influences the ADC sampling rate and the pulse width of the PWM output: - Absolute output ...
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... AS5145 Data Sheet - Table 15. Difference Between AS5145 and AS5045 Building Block PWM output: frequency selectable by OTP: Pin 12 1µs / step, 4096 steps per revolution, f=244Hz 2µs/ step, 4096 steps per revolution, f=122Hz Sampling frequency Propagation delay Transition noise (rms; 1sigma) PPTRIM; programming voltage 3.3V – 3.6V <70ºC; ...
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... AS5145 Data Sheet - Package Drawings and Markings The device is available in SSOP 16 (5.3mm x 6.2mm). Figure 24. Package Drawings Table 16. Package Dimensions Symbol www.austriamicrosystems.com/AS5145 AYWWIZZ AS5145 mm Min Typ 1.73 1.86 0.05 0.13 1.68 1.73 0.25 0.315 0.09 - 6.07 6.20 7.65 7.8 5.2 5.3 0.65 0º ...
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... AS5145 Data Sheet - 10.1 Recommended PCB Footprint Figure 25. PCB Footprint Table 17. Recommended Footprint Data Symbol www.austriamicrosystems.com/AS5145 mm 9.02 6.16 0.46 0.65 5.01 Revision 1. ...
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... Removed 10 bit from pin descriptions for pin 12 on page 4 mub Deleted Min value for t updated ordering information apg Changed the Max value of t Added “AS5145-I10/AS5145-I12” to the header rfu Made some sentence corrections and spelling mistakes Updated Incremental Mode on page 14 apg ...
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... AS5145A-HSSU Pre-programmed 10 bit incremental AS5145B-HSSU Pre-programmed 12 bit incremental 1. The pre-programmed devices AS5145A-HSSU and AS5145B-HSSU are available on request. Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at http://www ...
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... No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/AS5145 Revision 1. ...