AS5245 AB austriamicrosystems, AS5245 AB Datasheet
AS5245 AB
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AS5245 AB Summary of contents
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... Hall Array & Frontend Amplifier Mux Mode_Index www.austriamicrosystems.com/AS5245 Two digital 12-bit absolute outputs Quadrature A/B (10- or 12-bit) and Index output signal User programmable zero position Failure detection mode for magnet placement monitoring and loss of power supply “Red-Yellow-Green” indicators display placement of magnet in ...
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... Power Supply Failure Detection ................................................................................................................................................ 23 9.6 Angular Output Tolerances ................................................................................................................................................................. 23 9.6.1 Accuracy .................................................................................................................................................................................... 23 9.6.2 Transition Noise......................................................................................................................................................................... 25 9.6.3 High Speed Operation ............................................................................................................................................................... 25 9.6.4 Propagation Delays ................................................................................................................................................................... 26 9.6.5 Internal Timing Tolerance .......................................................................................................................................................... 26 9.6.6 Temperature .............................................................................................................................................................................. 26 9.6.7 Accuracy over Temperature ...................................................................................................................................................... 26 9.7 AS5245 Differences to AS5045.......................................................................................................................................................... 27 10 Package Drawings and Markings ......................................................................................................................................... 11 Ordering Information ............................................................................................................................................................. www.austriamicrosystems.com/AS5245 Revision 1 ...
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... AS5245 Data Sheet - Pin Assignments Figure 2. Pin Assignments (Top View) DTest1_A_Bottom DTest2_B_Top DTest2_B_Bottom NC NC Mode_Index_Top Mode_Index_Bottom VSS_Top www.austriamicrosystems.com/AS5245 AS5245 Revision 1.5 24 VDD3V_Bottom PWM_Top 18 PWM_Bottom 17 CSn_Top ...
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... VDD3V3 24, 25 VDD5V 26, 27 MagINCn 28, 29 MagDECn 30, 31 www.austriamicrosystems.com/AS5245 Pin Type Test output in default mode Digital output Test output in default mode Digital output For internal use. Must be left unconnected - Select between slow (open, low: VSS) and fast (high) mode. Internal pull- Digital I/O pull-down down resistor ...
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... Table 2. Absolute Maximum Ratings Parameter DC supply voltage at pin VDD5V DC supply voltage at pin VDD3V3 Input pin voltage Input current (latchup immunity) Electrostatic discharge Storage temperature Body temperature (Lead-free package) Humidity non-condensing Ambient temperature www.austriamicrosystems.com/AS5245 Electrical Characteristics on page 6 Min Max Units -0 -0 -0.3 ...
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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/AS5245 Condition (one die only Operation 5V DD 3.3V Operation (pin V 5V and V 3V3 connected) 3V3 ...
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... VDD5V = 4.5 to 5.5V (5V operation) unless otherwise noted. AMB DD Table 4. Input Specification Symbol Parameter RES Resolution INL Integral non-linearity (optimum) opt INL Integral non-linearity (optimum) temp INL Integral non-linearity DNL Differential non-linearity TN Transition noise www.austriamicrosystems.com/AS5245 Condition V 5V 5V 5V 5V: 4 ...
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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/AS5245 Condition Fast mode (Mode = 1); Until status bit OCF = 1 Slow mode (Mode = 0 or open) ...
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... LOAD frequency LOAD f READ frequency READ f WRITE frequency WRITE www.austriamicrosystems.com/AS5245 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 500 ...
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... Maximum speed @ 4096 samples/rev Maximum speed @ 1024 samples/rev Maximum speed @ 256 samples/rev Maximum speed @ 64 samples/rev Note: A change of the Mode during operation is not allowed. The setup must be constant during power up and during operation. www.austriamicrosystems.com/AS5245 (see Figure 16). Slow Mode (mode=low or open) 2.61 kHz (384 µs) ≤ ...
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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 7. Status Bit Outputs OCF COF 1 0 Note: MagInc=MagDec=1 is only recommended in YELLOW mode www.austriamicrosystems.com/AS5245 ...
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... 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. These settings are permanent and can not be recovered. A change of the incremental mode (WRITE command) during operation could cause problems. A power-on-reset in between is recommended. ...
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... LSB, until position “x+2“is reached. Following this direction, the incremental outputs will again be updated with every change of the magnet position. Figure 7. Hysteresis Window for Incremental Outputs Incremental Output Indication www.austriamicrosystems.com/AS5245 Programmed Zero Position 1 LSB 3 LSB Hysteresis : 0.35° ...
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... The last data bit of the first device (Parity) is followed by a dummy bit and the first data bit of the second device (D11), etc. Figure 9. Daisy Chain Hardware Configuration µC Data IN CLK CSn www.austriamicrosystems.com/AS5245 400µs (100µs) AS5245 AS5245 AS5245 Bottom Die ...
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... The PWM frequency is internally trimmed to an accuracy of ±5% (±10% over full temperature range). This tolerance can be cancelled by measuring the complete duty cycle as shown above. Figure 11. PWM Output Signal Angle 0 deg (Pos 0) 359.91 deg (Pos 4095) www.austriamicrosystems.com/AS5245 8 D0 OCF COF LIN ...
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... R1 should be greater than or equal to 4k7 to avoid loading of the PWM output. Larger values of Rx and Cx will provide better filtering and less ripple, but will also slow down the response time. www.austriamicrosystems.com/AS5245 Table 10: ...
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... Note: The zero position value may also be modified before programming, e.g. to program an electrical zero position that is 180º (half turn) from the mechanical zero position, just add 2048 to the value read at the mechanical zero position and program the new value into the OTP register. www.austriamicrosystems.com/AS5245 Revision 1 ...
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... Default, 10 bit inc, 12 bit inc Output Md1 Z0 : Z11 CCW RA0 : RA4 ChipID0 ChipID1 : ChipID17 mbit0 (see Table 9 already set by Austriamicrosystems. (see Table 9) Revision 1.5 Function Factory Bit 1 Alarm mode Disable PWM Sync mode 12 bit Zero Position Direction Redundancy Address Factory Bit 18 bit Chip ID Factory Bit ...
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... This address can be stored in bits RA4…RA0 in the OTP user settings. Example: setting RA4…0 to “00001” will select bit 51 = PWhalfEN_Indexwidth, “00010” selects bit 50 = MagCompEN, “10010” selects bit 34 =CCW, etc. www.austriamicrosystems.com/AS5245 ...
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... The Alignment mode can be reset to normal operation by a power-on-reset (disconnect / re-connect power supply falling edge on CSn with PDIO = low. Figure 13. Enabling the Alignment Mode PDIO CSn Figure 14. Exiting Alignment Mode PDIO CSn www.austriamicrosystems.com/AS5245 (see Figure AlignMode enable 2µs 2µs min. min. exit AlignMode Revision 1 ...
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... A buffer capacitor of 100nF is recommended in both cases close to pin VDD5V. Note that pin VDD3V3 must always be buffered by a capacitor. It must not be left floating, as this may cause an instable internal 3.3V supply voltage, which may lead to larger than normal jitter of the measured angle. www.austriamicrosystems.com/AS5245 (see Figure (see Figure 15) ...
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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 B radius of 1.1mm (R1), should be in the range of ±45mT…±75mT Figure 16. Typical Magnet (6x3mm) and Magnetic Field Distribution www.austriamicrosystems.com/AS5245 at a given distance, along a concentric circle with a v (see Figure 16) ...
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... The total misalignment area of the graph covers a square of 2x2 mm (79x79mil) with a step size of 100µm. For each misalignment step, the measurement as shown in entered as the Z-axis in the 3D-graph. www.austriamicrosystems.com/AS5245 8 failure case, either when the magnetic field is out of range of the power supply is – Err )/2 is specified as better than ±0.5 degrees @ 25ºC ...
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... IC within the package (±0.235mm) must also be taken into account. The total nonlinearity error over process tolerances, temperature and a misalignment circle radius of 0.25mm is specified better than ±1.4 degrees. The magnet used for this measurement was a cylindrical NdFeB (Bomatec® BMN-35H) magnet with 6mm diameter and 2.5mm in height. www.austriamicrosystems.com/AS5245 -400 -700 ...
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... The upper speed limit in slow mode is ~6.000rpm and ~30.000rpm in fast mode. The only restriction at high speed is that there will be fewer samples per revolution as the speed increases at the highest resolution of 12 bit. 1. Statistically, 1 sigma represents 68.27% of readings; 3 sigma represents 99.73% of readings. www.austriamicrosystems.com/AS5245 Err max 271 ...
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... The influence of temperature in the absolute accuracy is very low. While the accuracy is less than or equal to ±0.5º at room temperature, it may increase to less then or equal to ±0.9º due to increasing noise at high temperatures. www.austriamicrosystems.com/AS5245 A rotating magnet will cause an angular error caused by the output propagation delay. ...
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... PPTRIM; programming voltage 3.3V – 3.6V <70ºC; 3.5V – 3.6V >70ºC; OTP programming options 52-bit serial data protocol; CSn, PDIO and CLK www.austriamicrosystems.com/AS5245 AS5245 12bits, 0.088º/step. -40ºC to +125ºC read: 18bits (12bits data + 6 bits status) ...
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... The device is available in a QFN 32 (7mm x 7mm) package. Figure 19. Package Drawings AS5245 Top View Side View Table 15. Package Dimensions Symbol Min 4.18 E1 4.18 L 0. 0.80 A1 www.austriamicrosystems.com/AS5245 Bottom View mm Typ Max Min 7 BSC 7 BSC 4.28 4.38 0.165 4.28 4.38 0.165 0.55 0.65 0.018 0.30 ...
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... Nov 05, 2009 1.3 Dec 04, 2009 Apr 01, 2010 1.4 Apr 13, 2010 1.5 Jun 17, 2010 Note: Typos may not be explicitly mentioned under revision history. www.austriamicrosystems.com/AS5245 Owner Initial revision Changes made to values in Table 9 apg Updated min, typ, max values for t Characteristics 1) Note added under ...
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... 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.austriamicrosystems.com/distributor www.austriamicrosystems.com/AS5245 Table 16. Description Delivery Form Tape & Reel http://www.austriamicrosystems.com/ICdirect mailto:sales@austriamicrosystems.com Revision 1.5 Package QFN 32 (7mm x 7mm ...
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... AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application ...