AS5134 PB austriamicrosystems, AS5134 PB Datasheet

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AS5134 PB

Manufacturer Part Number
AS5134 PB
Description
BOARD PROGRAM AS5134
Manufacturer
austriamicrosystems
Datasheets

Specifications of AS5134 PB

Module/board Type
ZIF Socket
For Use With/related Products
AS5000 Programmer, AS5134
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
www.austriamicrosystems.com/AS5134
A S 5 1 3 4
3 6 0 S t e p P r o g r a m m a b l e H i g h S p e e d M a g n e t i c R o t a r y E n c o d e r
1 General Description
The AS5134 is a contactless magnetic rotary encoder for accurate
angular measurement over a full turn of 360º. It is a system-on-chip,
combining integrated Hall elements, analog front-end and digital
signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating over
the center of the chip is required. The absolute angle measurement
provides instant indication of the magnet’s angular position with a
resolution of 8.5 bit = 360 positions per revolution. This digital data is
available as a serial bit stream and as a PWM signal. In addition to
the angle information, the strength of the magnetic field is also
available as a 6-bit code.
Data transmission can be configured for 1-wire (PWM), 2-wires
(DCLK, DIO) or 3-wires (DCLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly
as the zero position of the magnet does not need to be mechanically
aligned.
A Power Down Mode together with fast startup and measurement
cycles allows a very low average power consumption.
2 Key Features
Figure 1. AS5134 Magnetic Rotary Encoder IC Block Diagram
D a t a S h e e t
360º contactless angular position encoding
VDD 5 V
GND
Hall Array
Frontend
Amplifier
&
Power Management
AS5134
Commutation
U V W A B Index
Interface
Tracking ADC
Decoder
& Angle
Revision 1.13
AGC
Incremental
Interface
3 Applications
The AS5134 is suitable for contactless rotary position sensing, rotary
switches (human machine interface), AC/DC motor position control
and Brushless DC motor position control.
Mag
Two digital 360 step (8.5 bit) absolute outputs: Serial interface
and Pulse width modulated (PWM) output
User programmable zero position and sensitivity
High speed: up to 82.000 rpm
Direct measurement of magnetic field strength allows exact
determination of vertical magnet distance
Incremental Outputs ABI Quadrature: 90 ppr, step direction:
180ppr, fixed pulse width 360ppr
BLDC Outputs UVW, selectable for 1,2,3,4,5,6 pole pairs
Daisy-Chain mode for cascading of multiple sensors
9-bit multi turn counter
Low power mode with fast startup
Wide magnetic field input range: 20 – 80 mT
Wide temperature range: -40ºC to +140ºC
Fully automotive qualified to AEC-Q100
Small Pb-free package: SSOP 20
AGC
Zero
Pos.
OTP
Angle
PWM Decoder
Multiturn
Absolute
Interface
Counter
Serial
(SSI)
PWM
PROG
DIO
CS
CLK
C2
DX
1 - 40

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AS5134 PB Summary of contents

Page 1

... AS5134 Frontend Amplifier Power Management GND www.austriamicrosystems.com/AS5134 Two digital 360 step (8.5 bit) absolute outputs: Serial interface and Pulse width modulated (PWM) output User programmable zero position and sensitivity High speed 82.000 rpm Direct measurement of magnetic field strength allows exact ...

Page 2

... Low Power Mode ....................................................................................................................................................................... 27 8.5 Magnet Diameter and Vertical Distance ............................................................................................................................................. 28 8.5.1 The Linear Range ...................................................................................................................................................................... 28 8.5.2 Magnet Thickness...................................................................................................................................................................... 30 8.5.3 Axial Distance (Airgap) .............................................................................................................................................................. 30 8.5.4 Angle Error vs. Radial and Axial Misalignment.......................................................................................................................... 31 8.5.5 Accuracy .................................................................................................................................................................................... 31 8.5.6 Mounting the Magnet ................................................................................................................................................................. 32 8.5.7 Summary ................................................................................................................................................................................... 34 8.6 AS5134 Parameter and Features List ................................................................................................................................................ 34 www.austriamicrosystems.com/AS5134 Revision 1. ...

Page 3

... AS5134 Data Sheet - Package Drawings and Markings ........................................................................................................................................... 9.1 Recommended PCB Footprint............................................................................................................................................................ 38 10 Ordering Information............................................................................................................................................................. www.austriamicrosystems.com/AS5134 Revision 1. ...

Page 4

... VSS PWM 6 VDD 7 Test Coil 8 DDCLK 9 DIO Index 16 TB0 17 TB1 18 TB2 19 TB3 20 www.austriamicrosystems.com/AS5134 1 20 TB3 VSS 2 19 TB2 TB1 TB0 Index DIO 10 U Programming voltage input, must be left open in normal operation. Maximum load = 20pF (except during programming) Supply ground Chip select output for 2-wire mode and Daisy Chain cascading Chip select input for 3-wire mode Select between 2-wire (C2 → ...

Page 5

... Table 2. Absolute Maximum Ratings Parameter Supply voltage Input Pin Voltage Input Current (latch up immunity) ESD Package Thermal Resistance SL Package Thermal Resistance ML Storage Temperature Soldering conditions, Body temperature (Pb-free package) Humidity non-condensing www.austriamicrosystems.com/AS5134 Electrical Characteristics on page 6 Min Max Units -0 VSS-0.5 VDD V -100 ...

Page 6

... PWM f PWM frequency PWM Programming Parameters V Programming Voltage PROG I Programming Current PROG www.austriamicrosystems.com/AS5134 , unless otherwise noted. SS Conditions Min 4.5 No load on outputs. Supply current can be reduced by using stronger magnets. Low Power Mode Startup from zero Startup from Low Power mode Step rate of tracking ADC; ...

Page 7

... High level output voltage V OH Low level output voltage V OL Capacitive load CL IO Tristate leakage current Z www.austriamicrosystems.com/AS5134 Conditions During programming Timing is internally generated During analog readback mode at pin Prog sens = 00 (default; high sensitivity) sens = 01 sens = 10 sens = 11 (low sensitivity) CMOS Inputs: DDCLK, CS, DIO, C2 ...

Page 8

... Bus floating time, t10 Negative edge of chip select to float bus Timeout period in 2-wire mode (from t TO rising edge of DCLK) t Clock Timing CLK www.austriamicrosystems.com/AS5134 Conditions Min 3-Wire Interface Normal operation During OTP programming 200 2-Wire Interface Normal operation 0.1 During OTP programming ...

Page 9

... The AS5134 can be connected to an external controller in several ways as listed below: Serial 3-wire R/W connection Serial 3-wire Read-only connection Serial 2-Wire connection (R/W Mode) Serial 2-Wire Differential SSI connection 1-Wire PWM connection Analog output Quadrature A/B/Index output Brushless DC Motor Commutation Mode Daisy Chain Mode www.austriamicrosystems.com/AS5134 Revision 1. ...

Page 10

... hardware configuration input. C2 selects 3-wire mode (C2 = low) or 2-wire mode (C2 = high). command phase t CLK DCLK DIO CMD4 CMD3 t3 t4 DIO Table 5. Serial Bit Sequence (16bit read/write) Write Command D15 D14 D13 D12 D11 D10 www.austriamicrosystems.com/AS5134 VDD VDD Output CS Output DCLK I/O DIO C2 VSS data phase CMD0 D15 ...

Page 11

... VSS command phase DCLK DIO DIO Table 6. 2-or 3-wire Read-only Serial Bit Sequence (21bit read) Command D15 D14 D13 D12 D11 D10 lock www.austriamicrosystems.com/AS5134 VDD VDD Output CS Output DCLK Input DIO 10k… C2 VSS 100k data phase D15 D14 Read Data D9 ...

Page 12

... A Chip Select (CS) signal is automatically generated by the DX output, when a time-out of DCLK occurs (typ. 20µs). Note: Read-only mode is also possible in this configuration. Figure 6. 2-Wire R/W Mode +5V VDD VDD VSS VSS command phase DCLK DIO CMD4 CMD3 DIO www.austriamicrosystems.com/AS5134 VDD C2 Output DCLK I/O DIO VSS data phase CMD1 CMD0 CMD2 t6 D15 Revision 1.13 100nF ...

Page 13

... Note: This type of transmission is read-only. Figure 7. 2-Wire SSI Read-only Mode +5V VDD VDD Output Input VSS VSS 2 1 DCLK DI Refer to Table 6 on page 11 for information on 2-or 3-wire Read-only Serial Bit Sequence (21bit read). www.austriamicrosystems.com/AS5134 MAX 3081 or similar D+ D- DCLK DCLK DIO ...

Page 14

... The PWM signal will be generated from the actual stored angle information. The zero-angle corrected value is buffered and fixed until the next PWM-sequence is started. To ease the filtering of the PWM signal, a minimum pulse width is implemented in the protocol. www.austriamicrosystems.com/AS5134 CS VDD AS5134 Input ...

Page 15

... Channel B leads channel counter-clockwise rotation. Figure 10. Incremental Output Modes Quad A/B/Index-Mode A B Index Table 7. Programming Options for the Quadrature Signals A/B/Index Abi (13:12 www.austriamicrosystems.com/AS5134 5V 0V >=4k7 >=4k7 Analog out 0º >=1µF >=1µF Mechanical Zero Position Rotation Direction Change Index=0 1 LSB max ...

Page 16

... Remark: Reset for the digital interface: 3 wire mode → via chip select 2 wire mode → via timeout Port Symbol chip select CS DCLK DCLK www.austriamicrosystems.com/AS5134 Serial Synchronous Interface (SSI) on page 180 240 300 0 90 120 150 180 BLDC Pole Pairs : 1 → ...

Page 17

... CS_INT(3) DIO CS CLK www.austriamicrosystems.com/AS5134 Command and data information over one single line. The first bit of the command defines a read or write access. This port enables the daisy chain configuration of several devices. Three wire mode: Indicates the end of an interface cycle. Dx can be used as the chip select signal for the next device in the chain ...

Page 18

... Normal mode is used for normal operations, whereas extended mode is for accessing the OTP. Table 9. Commands of the SSI in Normal Mode # cmd bin mode 15 WRITE 23 10111 write LP CONFIG 1 SET MT 20 10100 write COUNTER www.austriamicrosystems.com/AS5134 Data(1) CMD(2) Data( D15 D14 t14_3 DX(1) DX( DIO DIO CLK CLK C2 ...

Page 19

... Table 10. Commands of the SSI in Extended Mode number of bits cmd bin mode .. ..60 WRITE 31 11111 xt write tst ID OTP 25 PROG_ 11001 xt write tst ID OTP www.austriamicrosystems.com/AS5134 Digital interface at normal mode multi-turn-counter <8:0> agc <5:0> Digital interface at extended mode Factory Settings 1 ...

Page 20

... Table 11. Redundancy Addressing R_a R_a R_a R_a R_bi Sensi Sensi tivity ABI tivity www.austriamicrosystems.com/AS5134 Digital interface at extended mode Factory Settings ..32 31 ..36 ..27 ..25 ..22 tst tst tst tst tst tst tst tst tst tst tst tst tst tst tst tst (see Figure 17 ...

Page 21

... AS5134 Data Sheet - Table 11. Redundancy Addressing R_a R_a R_a R_a R_bi Sensi Sensi tivity ABI tivity www.austriamicrosystems.com/AS5134 ABI Revision 1. ...

Page 22

... WRITE OTP, #31), the programming voltage is not required. The capacitors must be as close as possible to the pin, to ensure that a serial inductance of 50nH is not to be exceeded. The 50nH inductance could translate into a cable length of approximately 5cm. Figure 14. OTP Programming Connection +5V VDD VSS www.austriamicrosystems.com/AS5134 or the optional 2-wire interface (see Figure 6). For permanent programming (command PROG VDD VDD ...

Page 23

... OTP register (starting with D61). A voltage of <500mV indicates a correctly programmed bit (“1”) while a voltage level between 2.2V and 3.5V indicates a correctly unprogrammed bit (“0”). Any voltage level in between indicates incorrect programming. www.austriamicrosystems.com/AS5134 Special Case V ...

Page 24

... 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 AS5134 may be reduced due to the out of range condition of the magnetic field strength. www.austriamicrosystems.com/AS5134 VDD VDD Output CS ...

Page 25

... Counter clockwise rotation exhibits decreasing angle values and a negative turn count respectively. Bit Code 011111111 --- 01111111 --- 00000011 00000010 00000001 00000000 11111111 www.austriamicrosystems.com/AS5134 The serial data that is obtained by command READ ANGLE contains the 6-bit AGC (see Table 3). Decimal Value Revision 1.13 256 --- 127 --- +3 +2 ...

Page 26

... Total Propagation Delay of the AS5134 The total propagation delay of the AS5134 is the delay in the analog signal path and the tracking rate of the ADC: www.austriamicrosystems.com/AS5134 2μs ∗ NewAngle OldAngle – ------------------------------------------------------------------------- - ...

Page 27

... Time period during which the chip is in reduced power mode off To access the Low Power Mode, the bit ‘LP’ <15> of the digital interface has to be set to “1”. Figure 18. Low Power Mode Connection 100nF C1 www.austriamicrosystems.com/AS5134 -6 Δθ = rpm * degrees pd θ ...

Page 28

... Figure 19. 3D-Graph of Vertical Magnetic Field of a 6mm Cylindrical Magnet Bz [mT] X -displacement [mm] www.austriamicrosystems.com/AS5134 An optional RC-filter (R1/C1) may be added to avoid peak currents in the power supply line www.austriamicrosystems.com → Magnetic Rotary Encoders BZ; 6mm magnet @ Z=1mm area of X- Y-misalignment from center: ±0.5mm circle of Hall elements on chip Revision 1 ...

Page 29

... Figure 20. Vertical Magnetic Field across the center of a Cylindrical Magnet www.austriamicrosystems.com/AS5134 Large Diameter Magnet (>6mm) larger horizontal misalignment area -- weaker differential signal = poorer signal / noise ratio, Bz; 6mm magnet @ y=0; z=1mm ...

Page 30

... This range lies between 45 and 75mT or between 20 and 80mT, depending on the encoder product. Linear position sensors are more sensitive as they use weaker magnets. The allowed magnetic range lies typically between 5 and 60mT. www.austriamicrosystems.com/AS5134 d= 6mm x h= 2.5mm ref. magnet: h/d = 0.42 Rel ...

Page 31

... The total misalignment area of the graph covers a square of 2x2 mm (79x79mil) with a step size of 200µm. The gap between surface and magnet is z=500µm. Figure 23. 3D Graph Displaying Non-Linearity Over XY-Misalignment Linearity Error over XY-misalignment [°] -1000 -600 -200 200 Y 600 www.austriamicrosystems.com/AS5134 (see Figure 20). Figure 23 shows an example of a 3D-graph displaying non-linearity over XY- -200 -600 1000 -1000 Revision 1.13 3-3 ...

Page 32

... If the magnet is mounted in non-magnetic material, such as plastic or diamagnetic material, such as copper, the magnetic field distribution is not disturbed. Even paramagnetic material, such as aluminium may be used. The magnet may be mounted directly in the shaft Note: Stainless steel may also be used, but some grades are magnetic. Therefore, steel with magnetic grades should be avoided. www.austriamicrosystems.com/AS5134 Revision 1.13 (see Figure 25) ...

Page 33

... If the magnet has to be mounted inside a magnetic shaft, a possible solution is to place a non-magnetic spacer between shaft and magnet, as shown in Figure 27. While the magnetic field is rather distorted towards the shaft, there are still adequate field lines available towards the sensor IC. The distortion remains reasonably low. www.austriamicrosystems.com/AS5134 Revision 1. ...

Page 34

... Propagation delay (in locked state) Transition noise (rms; 1 sigma) Integral Nonlinearity (INL), centered magnet Multiturn Counter Low power mode www.austriamicrosystems.com/AS5134 AS5134 4.5 to 5.5 V 8.5 bit (360 steps, 1º per step) ABI quadrature: 90 ppr, (default) step/direction: 180 ppr (OTP option) fixed pulse width: 360ppr UVW ...

Page 35

... BLDC Outputs BLDC outputs BLDC pole pair options Hysteresis on BLDC outputs Switching positions www.austriamicrosystems.com/AS5134 AS5134 2µs / step. 360º angle range in all modes. Minimum pos. pulse width (at 0º) = 16µs (8 LSB) Minimum neg. pulse width (at 359º) = 16µs (8 LSB) Pulse width at 0º = 16µs, Pause = 734µs Pulse width at 1º ...

Page 36

... Parameter Incremental Outputs Incremental modes Step size Incremental Hysteresis OTP Programming OTP programming technology OTP programming options OTP programming method OTP programming verification www.austriamicrosystems.com/AS5134 AS5134 modes: Quad AB with Index (2x90 ppr), Step/direction (1x180 ppr) Fixed pulse width (360ppr) 1º 0-3LSB; 2LSB (default) ...

Page 37

... Z PIN 1 Identification D Table 14. 20-pin SSOP Package Dimensions Symbol Min A A1 0. 0. 7.4 K 0º L 0.55 ZHPT 0.615 www.austriamicrosystems.com/AS5134 Typ Max Min 2 0.002 1.75 1.85 0.065 0.3 0.25 0.004 7.2 7.5 0.272 5.3 5.6 0.197 0.65 BSC 7.8 8 ...

Page 38

... AS5134 Data Sheet - 9.1 Recommended PCB Footprint Figure 29. PCB Footprint Table 15. Recommended Footprint Data Symbol www.austriamicrosystems.com/AS5134 mm 9.02 6.16 0.46 0.65 6.31 Revision 1.13 inch 0.355 0.242 0.018 0.025 0.248 ...

Page 39

... Apr 29, 2009 1.11 Jun 24, 2009 1.12 Sep 25, 2009 1.13 Jan 27, 2010 Note: Typos may not be explicitly mentioned under revision history. www.austriamicrosystems.com/AS5134 Owner Added Extended Operation Mode: Timing of Analog Readout (page 24) Updated Connecting the AS5134 (page 9) Updated Key Features (page 1), ...

Page 40

... 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 ...

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