AS5045ASSU austriamicrosystems, AS5045ASSU Datasheet

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AS5045ASSU

Manufacturer Part Number
AS5045ASSU
Description
IC, MAGNETIC ROTARY ENCODER 12BIT SSOP16
Manufacturer
austriamicrosystems
Datasheet

Specifications of AS5045ASSU

Ic Function
Encoder IC
Supply Voltage Range
3V To 3.6V, 4.5V To 5.5V
Operating Temperature Range
-40°C To +125°C
Digital Ic Case Style
SSOP
No. Of Pins
16
Msl
MSL 3 - 168 Hours
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
1
The AS5045 is a contactless magnetic rotary encoder for
accurate angular measurement over a full turn of 360°.
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
magnet may be placed above or below the IC.
The absolute angle measurement provides instant
indication of the magnet’s angular position with a
resolution of 0.0879° = 4096 positions per revolution.
This digital data is available as a serial bit stream and as
a PWM signal.
An internal voltage regulator allows the AS5045 to
operate at either 3.3 V or 5 V supplies
1.1
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Revision 1.5
AS5045
12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
Complete system-on-chip
Flexible system solution provides absolute and PWM
outputs simultaneously
Ideal for applications in harsh environments due to
contactless position sensing
No calibration required
General Description
Figure 1: Typical arrangement of AS5045 and magnet
Benefits
www.austriamicrosystems.com
1.2
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1.3
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Industrial applications:
Automotive applications:
Replacement of high end potentiometers
Contactless high resolution rotational position
encoding over a full turn of 360 degrees
Two digital 12bit absolute outputs:
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 Z-axis
Serial read-out of multiple interconnected AS5045
devices using Daisy Chain mode
Tolerant to magnet misalignment and airgap
variations
Wide temperature range: - 40°C to + 125°C
Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)
- Contactless rotary position sensing
- Robotics
- Steering wheel position sensing
- Transmission gearbox encoder
- Headlight position control
- Torque sensing
- Valve position sensing
Key Features
- Serial interface and
- Pulse width modulated (PWM) output
Applications
DATA SHEET
Page 1 of 24

Related parts for AS5045ASSU

AS5045ASSU Summary of contents

Page 1

... Wide temperature range: - 40° 125°C - Small Pb-free package: SSOP 16 (5.3mm x 6.2mm) - 1.3 Applications Industrial applications Contactless rotary position sensing - Robotics Automotive applications Steering wheel position sensing - Transmission gearbox encoder - Headlight position control - Torque sensing - Valve position sensing Replacement of high end potentiometers - www.austriamicrosystems.com DATA SHEET Page ...

Page 2

... By using an external low pass filter, the digital PWM signal is converted into an analog voltage, making a direct replacement of potentiometers possible. www.austriamicrosystems.com Type Description Clock Input of DI, Synchronous Serial Interface; ...

Page 3

... Max Unit Note -0 -0.3 VDD5V +0.3 V Except VDD3V3 in -100 100 mA Norm: JEDEC 78 ± Norm: MIL 883 E method 3015 -55 125 °C Min – 67°F ; Max +257°F t=20 to 40s, Norm: IPC/JEDEC J-Std-020C 260 °C Lead finish 100% Sn “matte tin” www.austriamicrosystems.com Page ...

Page 4

... IH See “programming V PROG conditions” 0 VDD5V I 30 100 iL Symbol Min Max V VSS+0 www.austriamicrosystems.com Unit Note V Normal operation V V CLK only µA µA CSn only, VDD5V: 5.0V Unit Note V V During programming V µA VDD5V: 5.5V Unit Note V VDD5V: 4.5V mA VDD5V: 3V µA Page ...

Page 5

... Max. offset between defined device center and 0.25 mm magnet axis (see Figure 18) 100 µm Eccentricity of magnet center to rotational axis NdFeB (Neodymium Iron Boron) -0.12 %/K SmCo (Samarium Cobalt) -0.035 www.austriamicrosystems.com Unit Note VDD5V: 4.5V mA VDD5V: 3V Unit Note VDD5V: 4 ...

Page 6

... T = -40 to +125°C, : fast mode (MODE = 1) amb 1 MHz Max. clock frequency to read out serial data Actual curve Ideal curve DNL+1LSB 2048 180° www.austriamicrosystems.com =25 °C. amb – Err ) / 2 max min = -40 to +125°C amb 4095 α 360 ° [degrees] Page ...

Page 7

... PWM Note Time between rising edge at Prog pin and rising edge of CSn Write data at the rising edge of ns CLK PROG ensure that V is stable with ...

Page 8

... PWM signal output also allows the generation of a direct proportional analogue voltage, by using an external Low- Pass-Filter. angular The AS5045 is tolerant to magnet misalignment and magnetic stray fields due to differential measurement technique and that indicate Figure 4: AS5045 block diagram www.austriamicrosystems.com Note during Analog Ref PROG Readback mode (see 8.4) V provides ...

Page 9

... This warning may be resolved by bringing the magnet within the X-Y-Z tolerance limits. Even Parity bit for transmission error detection of bits 1…17 (D11…D0, OCF, COF, LIN, MagINC, MagDEC) www.austriamicrosystems.com fast mode (Mode = high, VDD5V) 10.42 kHz (96µs) ≤ 0.06° rms 96µs ...

Page 10

... YELLOW range: magnetic field is ~ 25…45mT or ~75…135mT. The AS5045 may still Off be operated in this range, but with slightly reduced accuracy. RED range: magnetic field is ~<25mT or >~135mT still possible to operate the On AS5045 in the red range, but not recommended. n/a Not available www.austriamicrosystems.com Page ...

Page 11

... DO valid t DO active Angular Position Data Revision 1.5 Figure 6: Daisy Chain hardware configuration OCF COF st 1 Device Figure 7: Daisy Chain mode data transfer www.austriamicrosystems.com Mag Mag Even LIN D11 D10 D9 INC DEC PAR Status Bits Angular Position Data nd 2 Device ...

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... Note R1, R2 ≥ 4k7 C1, C2 ≥ 1µ should be ≥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 Typ Unit Note Signal period: 122 Hz 8194µs ...

Page 14

... The “Write Data” sequence may be applied at any time during normal operation. This configuration remains set while the power supply voltage is above the power-on reset level (see 3.6). See Application Note AN5000-20 for further information. www.austriamicrosystems.com assembly is completed, the Page ...

Page 15

... PROG Figure 11: Complete programming sequence AS5045 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 www.austriamicrosystems.com half dis status Power Off 7.5V VDD V ProgOff PROG finished connect to USB interface on PC ...

Page 16

... Analog Readback Data at PROG V programmed Mag PWM PWM Comp halfEN unprogrammed Dis EN 1 CLK Aread Figure 13: OTP register analog read www.austriamicrosystems.com , that ref , and the ref clock (after reading bit “ccw”), the chip Power-on- Reset; turn off supply Z11 CCW Z9 Z10 16 Page ...

Page 17

... 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 2.2...10µF VDD3V3 Internal LDO ...

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... MagINCn (pin 1) and MagDECn (pin 2), see Table 1. 360 N S Die surface Package surface Figure 19: Vertical placement of the magnet www.austriamicrosystems.com 3.9 mm 3.9 mm Defined center R d Area of recommended maximum magnet misalignment of 0.25mm from the defined ...

Page 19

... Table 5 failure case, either when the magnetic field is out of range of the power supply is missing, these outputs will become low. To ensure adequate low levels in case of a broken power supply to the AS5045, the pull-up resistors (~10kΩ) from www.austriamicrosystems.com ) is ±75mT at the , B (X1-X2) (Y1-Y2) ...

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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. Err m ax 325 379 433 487 541 595 649 703 757 Err m in www.austriamicrosystems.com 1000 800 600 400 200 0 x -200 -400 -600 -800 -1000 y transition noise 811 ...

Page 21

... Note: since the propagation delay is known, it can be automatically compensated by the control unit processing the data from the AS5045. www.austriamicrosystems.com s ) and the time it sample . delay Page ...

Page 22

... The only concern to the user is the width of the PWM output pulse, which relates directly to the timing tolerance of the internal oscillator. This influence however can be cancelled by measuring the complete PWM duty cycle instead of just the PWM pulse (see 14.5). www.austriamicrosystems.com Page ...

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... L 0.55 0.75 0.95 .022 16 Ordering Information Delivery: Tape and Reel (1 reel = 2000 devices) Tubes (1 box = 100 tubes à 77 devices) Order # AS5045ASSU for delivery in tubes Order # AS5045ASST for delivery in tape and reel Revision 1.5 Marking: AYWWIZZ inch A: Pb-Free Identifier Typ Max ...

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... AG for each application. 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 ...

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