AS5130ASSU austriamicrosystems, AS5130ASSU Datasheet
AS5130ASSU
Specifications of AS5130ASSU
Related parts for AS5130ASSU
AS5130ASSU Summary of contents
Page 1
... SINP / SINN / COSP / COSN Sin Cos Hall Array & Frontend Amplifier power management www.austriamicrosystems.com 2 Key Features 360º contactless angular position encoding Two digital 8-bit absolute outputs: - Serial interface - Pulse width modulated (PWM) output User programmable zero position High speed 30000 rpm ...
Page 2
... Application Information ....................................................................................................................... Benefits of AS5130............................................................................................................................................ Application Example 1 ........................................................................................................................................ Application Example II 3-wire sensor with magnetic field strength indication..................................................... Application Example III: Low-power encoder ..................................................................................................... Application Example IV: Polling mode................................................................................................................ Accuracy of the Encoder system ........................................................................................................................ Quantization Error .......................................................................................................................................... 29 Vertical Distance of the Magnet ..................................................................................................................... 31 Choosing the Proper Magnet ......................................................................................................................... 31 Magnet Placement ......................................................................................................................................... 32 www.austriamicrosystems.com Revision 1. ...
Page 3
... AS5130 Data Sheet - Lateral Displacement of the Magnet .............................................................................................................. 34 Magnet Size ................................................................................................................................................... 35 9 Package Drawings and Markings ....................................................................................................... Recommended PCB Footprint ........................................................................................................................... 10 Ordering Information......................................................................................................................... www.austriamicrosystems.com Revision 1. ...
Page 4
... VSS 3 SINP 4 SINN 5 COSP 6 COSN 7 Test Coil 8 DCLK DIO WAKE 14 PWM www.austriamicrosystems.com PWM 2 15 WAKE AS5130 DIO DCLK 9 Description Indicates if the magnetic field is present. If the field is too low, the signal is HI. OTP Programming Pad, programming voltage. For normal operation it must be left unconnected. ...
Page 5
... Package Thermal Resistance SSOP-16 Storage Temperature Ambient Temperature Junction Temperature Package body temperature Humidity non-condensing www.austriamicrosystems.com may cause permanent damage to the device. These are stress ratings only, Min Max Units Only relevant for polling operation mode, supply voltage with capacitor of the ...
Page 6
... N Magnet diameter MD Magnet thickness MT B Magnetic input range i Magnetic Sensitivity of AGC s B Magnetic Offset DC www.austriamicrosystems.com Conditions Except OTP programming Startup from zero Startup with preset AGC (Supplied during t phase off from the external buffer capacitor via DV pin) DD Startup from sleep power mode Analog signal path ...
Page 7
... PWM PWM pulse width PW MIN PW PWM pulse width MAX PW PWM period P f PWM frequency PWM www.austriamicrosystems.com Conditions Startup from zero Startup with preset AGC (Supplied during t phase off from the external buffer capacitor via DV pin) DD Startup from sleep power mode Open drain output with tri-state ...
Page 8
... Data Sheet - Table 3. Electrical Characteristics (Continued) Symbol Parameter Hyst Digital hysteresis Serial 8-bit Output f CLK Clock Frequency t CLK Clock Frequency CLK www.austriamicrosystems.com Conditions Min at change of rotation direction Normal operation 166.6 During OTP programming 250 Revision 1.09 Typ Max Units 1 bit 6 MHz ...
Page 9
... B performed by the customer. Table 5. Magnetic Input Range Setting 0 1 Binary 000 001 Gain A 0.9 1.05 B Max. 75mT limit www.austriamicrosystems.com Conditions ±38% inside of a range of 32mT …75mT, if the trimming is nominal 010 011 100 1.2 1.4 1.65 Revision 1.09 Min ...
Page 10
... In this mode, the AS5130 is connected to the external controller via three SSI signals: Chip Select (CS), Clock (CLK) input and DIO (Data) in/output. This configuration not only helps to read and write data but also defines different operation modes. The data transfer in all cases is done via the DIO port. Figure 3. Standard SSI Serial Data Interface 100n www.austriamicrosystems.com ...
Page 11
... D15 D14 D13 D12 D11 D10 D9 Figure 5. Extended Operation Mode (for access of OTP only) CMD_PHASE DCLK DIO CMD4 HI CMD2 t3 t4 DIO DIO Table 7. Serial Bit Sequence (16bit read/write) Write Command D15 D14 D13 D12 D11 D10 www.austriamicrosystems.com DATA_PHASE t5 CMD t11 t12 Read/Write Data ...
Page 12
... The minimum PWM pulse width t (PWM = high LSB @ 0º (Angle reading = 00 ON PWM pulse width increases with 1LSB per step. At the maximum angle 358.6º (Angle reading = FF t (PWM = high) is 256 LSB and the pause width 257LSB. www.austriamicrosystems.com DCLK micro AS5130 ...
Page 13
... The AS5130 can generate a ratiometric analog output voltage by low-pass filtering the PWM output. simple passive 2nd order low pass filter as an example. In order to minimize the ripple on the analog output, the cut-off frequency of the low pass filter should be well below the PWM base frequency. www.austriamicrosystems.com 71.7µs 142.3µs 71.15µ ...
Page 14
... If the SINN and COSN outputs cannot be sampled simultaneously recommended to disable the automatic gain control (see Table 8) as the signal amplitudes may be changing between two readings of the external ADC. This may lead to less accurate results. www.austriamicrosystems.com R≥4k7 analog C≥1µF out PWM 180º ...
Page 15
... RD_MULTI 00001 read lock 0 RD_ANGLE 00000 read lock WD2COS / WD2SIN: xen_X disables Hall element X from the sensor array in the cosine or sine channel; xinv_X inverts the voltage output of Hall element X in the channels. www.austriamicrosystems.com SINN D A SINP AS5130 AS5130 COSN D A ...
Page 16
... PROG_ OTP 25 11001 xt write OTP Test 24 11000 xt write OTP 15 01111 xt read Test www.austriamicrosystems.com at a low voltage (polling mode off or DD <25> <24:23> <22:20> <19:16> <15:12> <11:9> OTP Hall ID VREF lock Bias OTP Hall ID VREF lock Bias ...
Page 17
... For programming of the OTP, an additional voltage has to be applied to the pin PROG. It has to be buffered by a fast 100nF capacitor (ceramic) and a 10µF capacitor. The information to be programmed is set by command 25. The OTP bits are used for AMS factory trimming and cannot be overwritten. Figure 10. OTP Programming Connection + controller V SS www.austriamicrosystems.com <25> <24:23> <22:20> <19:16> <15:12> <11:9> Output CS Output ...
Page 18
... Any voltage level in between indicates improper programming. Figure 12. Analog OTP Verification + micro controller Redundancy Decoding www.austriamicrosystems.com maximum V parasitic cable SUPPLY inductance L<50nH prog PROG ...
Page 19
... Lock = low). To determine a valid angular signal at best performance, the following indicators should be set: Lock = 1 AGC = >00H and < 2FH Note: The angle signal may also be valid (Lock = 1), when the AGC is out of range (00H or 2FH), but the accuracy of the AS5130 may be reduced due to the out of range condition of the magnetic field strength. www.austriamicrosystems.com <15:12> 1000 0 1001 ...
Page 20
... A finer detection of a vertical distance change, for example when only short vertical strokes are made by the pushbutton, is achieved by memorizing the AGC value in normal operation and triggering on a change from that nominal the AGC value to detect a vertical movement. www.austriamicrosystems.com (see Table 8) 9). The OTP sensitivity setting corresponds to the customer register setting gain Revision 1 ...
Page 21
... A commonplace practice for systems using analog-to-digital converters is to filter the input signal by an anti-aliasing filter. The filter characteristic must be chosen carefully to balance propagation delay and noise. The lowpass filter in the AS5130 has a cutoff frequency of typ. 23.8kHz and the overall propagation delay in the analog signal path is typ. 15.6µs. www.austriamicrosystems.com 1k LED1 V ...
Page 22
... In Reduced Power Modes, the AS5130 is inactive. The last state, e.g. the angle, AGC value, etc. is frozen and the chip starts from this frozen state when it resumes active operation. This method provides much faster start-up than a “cold start” from zero. www.austriamicrosystems.com 15.6µs + 1.15µs = 16.75µ rpm * ...
Page 23
... The power cycling method shown in Figure 15 transistor high side switch. The current consumption in off-mode is zero. It also has the longest start-up time of all modes, as the chip must always perform a “cold start“ from zero, which takes about 1.9 ms (Compare with Mode on page 22). www.austriamicrosystems.com ...
Page 24
... WAKE signal, the system’s power consumption can be further decreased, if certain modules are activated on demand. Figure 16. External Circuitry for Polling Mode V SS The voltage at pin 16 (DV ) determines whether polling mode is activated or not. Any voltage above 3.6V activates DD the polling functionality. This voltage must always be present at DV www.austriamicrosystems.com ...
Page 25
... WAKE Interface An open drain NMOS structure is used in the WAKE pad. In order to generate a clear output signal level, a pull up resistor is required. The pad can drive 4mA. www.austriamicrosystems.com drops below 4.45V and then the information is stored DD on), the values are read back from the storage registers and the measured VDD on (fast) POR (40us ...
Page 26
... Wake up pulse wake up t On-time on t Off-time off Figure 18. Wake Up Signal During Polling Mode of AV AVDD tri-state WAKE delta (actual - reference angle) www.austriamicrosystems.com AVDD resistor PAD WAKE AS5130 Min Max Unit 1.5 100 kΩ Interrupt signal to external devices, tri-state 10 17 µ ...
Page 27
... VDD, VSS and the PWM output. The circle over the center of the chip represents the diametrically polarized magnet. Additionally, the CAO pin will deliver an analog voltage indicating a missing magnetic field. This signal could be used to drive an external LED or to detect an alert signal. www.austriamicrosystems.com V DD ...
Page 28
... In order to read out the correct data, the active mode time must be larger than 150µs. Figure 21. Low Power Encoder 100n AS5130 Example: sampling period = one measurement every 10ms. System constants = I = 15mA, I active power_down I = avg www.austriamicrosystems.com 1k LED1 V PROG DD CAO CAO CS AS5130 AS5130 N ...
Page 29
... The two parameters are not necessarily linked together. A high resolution encoder may not necessarily be highly accurate as well. Quantization Error There is however a direct link between resolution and accuracy, which is the quantization error: www.austriamicrosystems.com ...
Page 30
... The INL (intrinsic non-linearity) is reduced to from ~+/- 1.1º down to ~ +/-0.3º. The averaging however, also increases the total propagation delay, therefore it may be considered for low speeds only or adaptive; depending on speed (see Position Error Over Speed: on page www.austriamicrosystems.com digitized function low ...
Page 31
... There is no strict requirement on the type or shape of the magnet to be used with the AS5130. It can be cylindrical as well as square in shape. The key parameter is that the vertical magnetic field B rotation axis is sinusoidal with a peak amplitude of 20..80mT www.austriamicrosystems.com Linearity and AGC vs Airgap 1000 1500 Airgap [µ ...
Page 32
... A magnetic field outside the specified range may still produce acceptable results, but with reduced accuracy. The out-of-range condition will be indicated, when the AGC is at the limits (AGC field too strong; AGC=63=(3F www.austriamicrosystems.com typ. 6mm diameter N ...
Page 33
... For example, if the magnet is misaligned in X-axis by -0.5mm, the two X-Hall sensors will measure 70mT (@x= - 1.5mm) and -22mt (@x= -0.5mm). Again, the differential amplitude is 92mT. At larger displacements however, the B amplitude becomes nonlinear, which results in larger errors that mainly affect the accuracy of the system 29). www.austriamicrosystems.com Bz; 6mm magnet @y=0; z=1mm 0.0015 0.001 ...
Page 34
... The Z-axis displays the worst case INL error over a full turn at each given X-and Y- displacement. The error includes the quantization error of ±0.7º (refer to centered magnet is between 1.0 – 1.5º (spec = 2º over full temperature range). Within a radius of 0.5mm, the accuracy is better than 2.0º (spec = 3º over temperature). www.austriamicrosystems.com BZ; 6mm magnet @ Z=1mm N center: +/- 0.5mm ...
Page 35
... External Interpolator on page Verify that the B -Curve between the poles is as linear as possible z from the magnet supplier(s). Alternatively, the SIN- or COS- output of the AS5130 may also be used together with an X-Y- table to get a B -scan of the magnet ( www.austriamicrosystems.com 0 -250 -500 -250 0 -750 250 ...
Page 36
... X-and Y- misplacements of the magnet to determine the maximum acceptable lateral displacement range recommended to disable the AGC for both these tests Cos Outputs with External Interpolator on page Note: For preferred magnet suppliers, please refer to the austriamicrosystems website (Rotary Encoder section). www.austriamicrosystems.com 14). ...
Page 37
... Figure 30. SSOP-16 Package Drawings Table 11. 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 AS5130 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 ...
Page 38
... AS5130 Data Sheet - Recommended PCB Footprint Figure 31. PCB Footprint Table 12. Recommended Footprint Data Symbol www.austriamicrosystems.com mm 9.02 6.16 0.46 0.65 5.01 Revision 1.09 inch 0.355 0.242 0.018 0.025 0.197 ...
Page 39
... AS5130 Data Sheet - Ordering Information The devices are available as the standard products shown in Table 13. Ordering Information Model Description AS5130ASST AS5130ASSU www.austriamicrosystems.com Table 13. Delivery Form Tape & Reel Tubes Revision 1.09 Package SSOP-16 SSOP- ...
Page 40
... The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein ...