AS5140H-ASSU austriamicrosystems, AS5140H-ASSU Datasheet
AS5140H-ASSU
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AS5140H-ASSU Summary of contents
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... Daisy Chain mode Fully automotive qualified to AEC-Q100, grade 0 Wide ambient temperature range: -40ºC to +150ºC 3 Applications The AS5140H is an ideal solution for automotive applications like engine compartment sensors, transmission gearbox encoder, throttle valve position control and for industrial applications like rotary sensors in high temperature environment ...
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... Physical Placement of the Magnet ................................................................................................................. 26 Simulation Modeling ........................................................................................................................................... Failure Diagnostics ............................................................................................................................................. Magnetic Field Strength Diagnosis ................................................................................................................ 28 Power Supply Failure Detection ..................................................................................................................... 28 Angular Output Tolerances ................................................................................................................................. Accuracy ........................................................................................................................................................ 29 Transition Noise ............................................................................................................................................. 31 High Speed Operation.................................................................................................................................... 31 Propagation Delays ........................................................................................................................................ 32 Internal Timing Tolerance .............................................................................................................................. 32 Temperature................................................................................................................................................... 33 8 Application Information ....................................................................................................................... Benefits of AS5140H .......................................................................................................................................... AS5140H Differences to AS5040 ....................................................................................................................... www.austriamicrosystems.com Revision 1 ...
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... AS5140H Data Sheet - Package Drawings and Markings ....................................................................................................... Recommended PCB Footprint ........................................................................................................................... 10 Ordering Information......................................................................................................................... www.austriamicrosystems.com Revision 1 ...
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... AS5140H Data Sheet - Pin Assignments Figure 2. Pin Assignments (Top View) MagINCn MagDECn A_LSB_U B_Dir_V NC Index_W VSS Prog Pin Descriptions The following table shows the description of each pin of the standard SSOP16 package (Shrink Small Outline Package, 16 leads, body size: 5.3mm x 6.2mmm; See Table 1 ...
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... Daisy Chain configuration, - Pin 11 Chip Select (CSn; active low) selects a device within a network of AS5140H 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 - Pin 12 allows a single wire output of the 10-bit absolute position value. The value is encoded into a pulse width modulated signal with 1µ ...
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... AS5140H Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 3 and functional operation of the device at these or any other conditions beyond those indicated in Characteristics on page 7 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Absolute Maximum Ratings ...
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... AS5140H Data Sheet - Electrical Characteristics T = -40 to 150ºC, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation), unless otherwise noted. AMB Table 4. Electrical Characteristics Symbol Parameter 1 RES Resolution 7 bit 8 bit LSB 9 bit 10 bit Integral non-linearity INL opt 2 (optimum) INL Integral non-linearity (optimum) temp INL ...
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... AS5140H Data Sheet - Table 4. Electrical Characteristics (Continued) Symbol Parameter VDD5V External supply voltage at pin VDD5V,VDD3V3 VDD3V3 External VDD3V3 supply t pwrup3 voltage rise time at power-up DC Characteristics for Digital Inputs and Outputs CMOS Schmitt-Trigger Inputs: CLK, CSn (CSn = internal Pull-up) V High level input voltage ...
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... AS5140H Data Sheet - Table 4. Electrical Characteristics (Continued) Symbol Parameter B Magnetic input field amplitude pk B Magnetic offset off Field non-linearity f mag_abs Input frequency (rotational speed of magnet) f mag_inc Disp Displacement Radius Chip placement tolerance Recommended magnet material and temperature drift Programming Conditions V Programming voltage ...
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... AS5140H Data Sheet - Timing Characteristics T = -40 to +150 ºC, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation), unless otherwise noted. AMB Table 5. Timing Characteristics Symbol Parameter Synchronous Serial Interface (SSI) t Data output activated (logic high) DO active t First data shifted to output register CLK FE T Start of data output ...
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... AS5140H Data Sheet - Figure 3. Integral and Differential Non-Linearity Example (exaggerated curve) α 10bit code 1023 512 0 0 ° www.austriamicrosystems.com Actual curve TN Ideal curve DNL+1LSB INL 0.35° 512 180° Revision 1.1 1023 α 360 ° [degrees ...
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... Figure 18). The AS5140H 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, an absolute angular representation is given by a Pulse Width Modulated signal at pin 12 (PWM). Simultaneously, the device also provides incremental output signals. The ...
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... D9:D0 – Absolute angular position data (MSB is clocked out first). OCF – (Offset Compensation Finished). Logic high indicates the finished Offset Compensation Algorithm. For fast startup, this bit may be polled by the external microcontroller. As soon as this bit is set, the AS5140H has completed the startup and the data is valid (see Table COF – ...
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... Daisy Chain Mode The Daisy Chain mode allows connection of several AS5140H’s in series, while still keeping just one digital input for data transfer (see “Data IN” in Figure 6 to the data input (Prog ...
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... In Daisy Chain mode, the Prog pin is connected directly to the DO pin of the subsequent device in the chain Figure 6). During programming (see Programming the AS5140H on page applied to pin Prog. This voltage level exceeds the limits for pin DO, so one of the following precautions must be made during programming: → ...
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... AS5140H Data Sheet - Figure 8. Incremental Output Modes Quad A/B-Mode A B Index Step / Dir-Mode LSB Dir CSn t Incremental outputs valid LSB Output (Step/Direction Mode) Output LSB reflects the LSB (least significant bit) of the programmed incremental resolution (OTP Register Bit Div0, Div1). Output Dir provides information about the rotational direction of the magnet, which may be placed above or below the device (1=clockwise ...
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... X+1 X Pulse Width Modulation (PWM) Output The AS5140H provides a pulse width modulated output (PWM), whose duty cycle is proportional to the measured angle: 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. ...
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... MAX Analog Output An analog output may be generated by averaging the PWM signal, using an external active or passive lowpass filter. The analog output voltage is proportional to the angle: 0º = 0V; 360º = VDD5V. Using this method, the AS5140H can be used as direct replacement of potentiometers. nd Figure 11. Simple Passive 2 ...
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... Data Sheet - Brushless DC Motor Commutation Mode Brushless DC motors require angular information for stator commutation. The AS5140H provides U-V-W commutation signals for one and two pole pair motors. In addition to the three-phase output signals, the step (LSB) output at pin 12 allows high accuracy speed measurement. Two resolutions ( bit) can be selected by programming Div0 ...
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... Application Note AN5000-30, which can be downloaded from the austriamicrosystems website. The OTP programming description in this datasheet is for general information only. After power-on, programming the AS5140H is enabled with the rising edge of CSn with Prog = high and CLK = low. The AS5140H programming is a one-time-programming (OTP) method, based on polysilicon fuses. The advantage of this method is that a programming voltage of only 3 ...
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... User Selectable Settings The AS5140H allows programming of the following user selectable options: - Md1, Md0: Incremental Output Mode Selection. - Div1, Div0: Divider Setting of Incremental Output. - Index: Index Pulse Width Selection – 1LSB / 3LSB [9:0]: Programmable Zero / Index Position. - CCW: Counter Clockwise Bit. ...
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... OTP bits Div1 and Div0 (see Table 10 Mode: Md1=1 / Md0=1 sets the AS5140H in brushless DC motor commutation mode with an additional LSB incre- mental signal at pin 12 (PWM_LSB). To allow programming of all bits, the default factory setting is all bits = 0. This mode is equal to mode 1:0 (quadrature A/B, 1LSB index width, 256ppr) ...
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... AS5140H Data Sheet - default, the zero / index position pulse is one LSB wide. It can be increased to a three LSB wide pulse by setting the Index-bit of the OTP register. Further programming options (commutation modes) are available for brushless DC motor-control. Md1 = Md0 = 1 changes the incremental output pins 3, 4 and 3-phase commutation signal. Div1 defines the number of pulses per revolution for either a two-pole (Div1=0) or four-pole (Div1=1) rotor ...
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... AS5140H Data Sheet - Alignment Mode The alignment mode simplifies centering the magnet over the center of the chip to gain maximum accuracy. Alignment mode can be enabled with the falling edge of CSn while Prog = logic high SSI change to a 10-bit displacement amplitude output. A high value indicates large displacement, but also higher absolute magnetic field strength ...
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... Data Sheet - 3. Operation The AS5140H 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 VDD3V3 ...
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... AS5140H Data Sheet - Figure 18. Typical Magnet and Magnetic Field Distribution Vertical field component 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 IC package as shown in Figure 19. Figure 19. Defined IC Center and Magnet Displacement Radius Magnet Placement www ...
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... AS5140H. 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 ...
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... Power Supply Failure Detection By Software: If the power supply to the AS5140H 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 ...
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... To ensure adequate low levels in case of a broken power supply to the AS5140H, the pull-up resistors (>10kΩ) from each pin must be connected to the positive supply at pin 16 (VDD5V). ...
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... AS5140H Data Sheet - Figure 22. Example of Linearity Error Over XY Misalignment The maximum non-linearity error on this example is better than ±1 degree (inner circle) over a misalignment radius of ~0.7mm. For volume production, the placement tolerance of the 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 ± ...
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... High Speed Operation The AS5140H samples the angular value at a rate of 10.42k samples per second. Consequently, the incremental and the absolute outputs are updated each by 96µ stationary position of the magnet, this sampling rate creates no additional error ...
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... AS5140H, thus reducing the angular error caused by speed. Internal Timing Tolerance The AS5140H does not require an external ceramic resonator or quartz. All internal clock timings for the AS5140H 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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... Temperature Magnetic Temperature Coefficient One of the major benefits of the AS5140H, in comparison 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 coefficient, the AS5140H automatically compensates for the varying magnetic field strength over temperature. The magnet’s temperature drift does not need to be considered, as the AS5140H operates with magnetic field strengths from ± ...
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... Operates up to +150ºC ambient temperature No temperature compensation necessary No calibration required 10 7-bit user programmable resolution Small Pb-free package: SSOP 16 (5.3mm x 6.2mm) AS5140H Differences to AS5040 The AS5140H and AS5040 differ in the following features: Table 12. Differences Between AS5140H and AS5040 Parameter Pin - assignment Pin - compatible Ambient temperature -40º ...
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... Table 13. SSOP-16 package dimensions Symbol Min A 1.73 A1 0.05 A2 1.68 b 0.25 c 0.09 D 6.07 E 7. 0º L 0.63 www.austriamicrosystems.com AYWWIZZ AS5140H mm Typ Max Min 1.86 1.99 0.068 0.13 0.21 0.002 1.73 1.78 0.066 0.315 0.38 0.010 - 0.20 0.004 6.20 6.33 0.239 7.8 7.9 0.301 5 ...
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... AS5140H Data Sheet - Recommended PCB Footprint Figure 25. PCB Footprint Table 14. Recommended Footprint Data Symbol www.austriamicrosystems.com mm 9.02 6.16 0.46 0.65 5.01 Revision 1.1 inch 0.355 0.242 0.018 0.025 0.197 ...
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... AS5140H Data Sheet - Ordering Information The devices are available as the standard products shown in Table 15. Ordering Information Model Description AS5140HASSU AS5140HASST www.austriamicrosystems.com Table 15. Delivery Form Tubes Tape & Reel Revision 1.1 Package SSOP-16 SSOP- ...
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... AS5140H Data Sheet - Copyrights Copyright © 1997-2008, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. ...