AS5043-ASSU austriamicrosystems, AS5043-ASSU Datasheet

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AS5043-ASSU

Manufacturer Part Number
AS5043-ASSU
Description
IC ENCODER PROG 10-BIT 16-SSOP
Manufacturer
austriamicrosystems
Type
Linear, Rotary Encoder - Programmabler
Datasheet

Specifications of AS5043-ASSU

Sensing Range
45mT ~ 75mT
Voltage - Supply
3 V ~ 3.6 V, 4.5 V ~ 5.5 V
Current - Supply
21mA
Current - Output (max)
4mA
Output Type
Analog, Digital
Features
Programmable
Operating Temperature
-40°C ~ 125°C
Package / Case
16-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number
Manufacturer
Quantity
Price
Part Number:
AS5043-ASSU
Manufacturer:
AMS
Quantity:
101
AS5043
Programmable 360° Magnetic Angle Encoder
with Absolute SSI and Analog Outputs
AS5043
Data Sheet - Pin Configuration
1 General Description
The AS5043 is a contactless magnetic angle encoder for
accurate measurement up to 360°.
It
elements, analog front end and digital signal processing
in a single device.
The AS5043 provides a digital 10-bit as well as a
programmable analog output that is directly proportional
to the angle of a magnet, rotating over the chip.
The analog output can be configured in many ways,
including user programmable angular range, adjustable
output voltage range, voltage or current output, etc..
An internal voltage regulator allows operation of the
AS5043 from 3.3V or 5.0V supplies.
2 Benefits
Complete system-on-chip
Figure 1: Typical Arrangement of AS5043 and Magnet
www.austriamicrosystems.com
is
Flexible system solution provides absolute output,
both digital and analog
Angle measurement with software programmable
range up to 360°
High reliability due to non-contact magnetic sensing
Ideal for applications in harsh environments
Robust system, tolerant to magnet misalignment,
airgap
external magnetic fields
No calibration required
a
system-on-chip,
variations,
temperature
combining
integrated
variations
Revision 1.80
Hall
and
3 Key Features
4 Applications
The AS5043 is ideal for applications with an angular
travel range from a few degrees up to a full turn of
360°, such as
-
-
Front panel rotary switches
Replacement of potentiometers
Industrial applications:
- Contactless rotary position sensing
- Robotics
- Valve Controls
Automotive applications:
- Throttle position sensors
- Gas / brake pedal position sensing
- Headlight position control
360° contactless high resolution angular position
encoding
User programmable zero position
Two 10-bit absolute outputs:
Serial digital interface and
Versatile analog output
Failure detection mode for magnet field strength
and loss of power supply
Serial read-out of multiple interconnected
AS5043 devices using daisy chain mode
Mode input for optimizing noise vs. speed
Alignment mode for magnet placement guidance
Wide temperature range: - 40°C to + 125°C
Small package: SSOP 16 (5.3mm x 6.2mm)
programmable angular range up to 360°
programmable ratiometric output voltage range
Data Sheet
1 – 36

Related parts for AS5043-ASSU

AS5043-ASSU Summary of contents

Page 1

... The AS5043 provides a digital 10-bit as well as a programmable analog output that is directly proportional to the angle of a magnet, rotating over the chip. The analog output can be configured in many ways, including user programmable angular range, adjustable output voltage range, voltage or current output, etc ...

Page 2

... AS5043 Data Sheet - Pin Configuration 5 Pin Configuration Figure 2: AS5043 Pin Configuration SSOP16 Package = SSOP16 (16 lead Shrink Small Outline Package) Table 1: Pin Description SSOP16 Pin Symbol Type Description Magnet Field Magnitude RaNGe warning; active low, indicates that the magnetic field 1 MagRngn DO_OD strength is outside of the recommended limits ...

Page 3

... AS5043 Data Sheet - Pin Configuration 5.1 Pin Description Pins 7, 15 and 16 are supply pins, pins 5, 13 and 14 are for internal use and must be left open. Pin 1 is the magnetic field strength indicator, MagRNGn open-drain output that is pulled to VSS when the magnetic field is out of the recommended range (45mT to 75mT). The chip will still continue to operate, but with reduced performance, when the magnetic field is out of range ...

Page 4

... A small low cost diametrically magnetized (two-pole) standard magnet, centered over the chip, is used as the input device. The AS5043 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, the absolute angular representation is converted to an analog signal, ratiometric to the supply voltage. The analog output can be configured in many ways, such as 360° ...

Page 5

... AS5043 Data Sheet – 3. Operation 7 3. Operation The AS5043 operates either at 3.3V ±10 ±10%. This is made possible by an internal 3.3V Low-Dropout (LDO) Voltage regulator. The core supply voltage is always taken from the LDO output, as the internal blocks are always operating at 3.3V. ...

Page 6

... AS5043 Data Sheet – 10-bit Absolute Synchronous Serial Interface (SSI) 8 10-bit Absolute Synchronous Serial Interface (SSI) The serial data transmission timing is outlined in Figure 5: if CSn changes to logic low, Data Out (DO) will change from high impedance (tri-state) to logic high and the read-out sequence will be initiated. ...

Page 7

... Data Sheet – 10-bit Absolute Synchronous Serial Interface (SSI) 8.2 Z-Axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator) The AS5043 provides several options of detecting movement and distance of the magnet in the vertical (Z-) direction. Signal indicators MagINC, MagDEC and LIN are available as status bits in the serial data stream, while MagRngn is an open-drain output that indicates an out-of range status (on in YELLOW or RED range) ...

Page 8

... The absolute angular position is sampled at a rate of 10.4kHz (t=96µs) in fast mode and at a rate of 2.6kHz (t=384µs) in slow mode. These modes are selected by pin MODE (#2) during the power up of the AS5043. This pin activates or deactivates an internal filter, which is used to reduce the digital jitter and consequently the analog output noise. ...

Page 9

... Data Sheet – Daisy Chain Mode 10 Daisy Chain Mode The Daisy Chain Mode allows connection of several AS5043’s in series, while still keeping just one digital input for data transfer (see “Data IN” in Figure 6 ). This mode is accomplished by connecting the data output (DO; pin 9) to the data input (PROG ...

Page 10

... AS5043 Data Sheet – Analog Output 11 Analog Output The analog output V provides an analog voltage that is proportional to the angle of the rotating magnet and ratiometric out to the supply voltage VDD5V (max.5.5V). It can source or sink currents up to ±1mA in normal operation (up to 66mA short circuit current). ...

Page 11

... AS5043 Data Sheet – Analog Output 11.1.2 Diagnostic Output Mode Figure 9: Diagnostic Output Mode Vref 100% 90% analog output voltage 10% 0% 0° 90° enable this feature an OTP bit in the factory setting must be set. The corresponding bit is FS6. See application note AS5040-20 (Extended features of OTP programming) for further details. The application note is available for download at the austriamicrosystems website ...

Page 12

... Data Sheet – Programming the AS5043 12 Programming the AS5043 After power-on, programming the AS5043 is enabled with the rising edge of CSn and Prog = logic high. 16 bit configuration data must be serially shifted into the OTP register via the Prog-pin. The first “CCW” bit is followed by the zero position data (MSB first) and the Analog Output Mode setting as shown in Table 5 ...

Page 13

... Figure 12: OTP Programming Hardware Connection of AS5043 (shown with AS5043 demoboard) 12.1 Zero Position Programming The AS5043 allows easy assembly of the system, as the actual angle of the magnet does not need to be considered. By OTP programming, any position can be assigned as the new permanent zero position with an accuracy of 0.35° (all modes) ...

Page 14

... AS5043 Data Sheet – Programming the AS5043 Figure 13: Zero Position Programming (shown for 360° mode) VDD5V 5V analog output voltage 2V 0V 0° 12.2 Analog Mode Programming The analog output can be configured in many ways: It consists of three major building blocks, a digital range preselector, a 10-bit Digital-to-Analog-Converter (DAC) and an OP-AMP buffer stage ...

Page 15

... The response curve for the analog output is linear for the selected range (45°/90°/180°/360°). In addition, the slope is mirrored at 180° for 45°- and 90°- modes and has a step response at 270° for the 180°-mode. This allows the AS5043 to be used in a variety of applications. In these three modes, the output remains at V output change when the mechanical angle is rotated beyond the selected analog range. In 360° ...

Page 16

... Note: the resolution on the digital SSI interface is always 10bit (0.35°/step) over 360°, independent on analog mode 12.3 Repeated OTP Programming Although a single AS5043 OTP register bit can be programmed only once (from possible to program other, unprogrammed bits in subsequent programming cycles. However, a bit that has already been programmed should not be programmed twice. Therefore it is recommended that bits that are already programmed are set to “ ...

Page 17

... Vout TN = transition noise (in °rms; see 19.5) VDD5V = Supply voltage VDD5V noise level of OPAMP noise,OPAMP (paragraph 19.3.6) in Vrms 12.7 Application Examples See Application Note AN5043-10 for AS5043 Application Examples. www.austriamicrosystems.com out in paragraph 19.3.6. Note that the noise level is given noise ∗ TN VDD 5 V ...

Page 18

... To put the AS5043 in Analog Readback Mode, a digital sequence must be applied to pins CSn, PROG and CLK as shown in Figure 15. The digital level for this pin depends on the supply configuration (3.3V or 5V; see section 1, page 5). ...

Page 19

... AS5043 Data Sheet – Alignment Mode 14 Alignment Mode The alignment mode simplifies centering the magnet over the chip to gain maximum accuracy and XY-alignment tolerance. This electrical centering method allows a wider XY-alignment tolerance (0.485mm radius) than mechanical centering (0.25mm radius eliminates the placement tolerance of the die within the IC package (+/- 0.235mm). ...

Page 20

... AS5043 Data Sheet – Choosing the Proper Magnet 15 Choosing the Proper Magnet Typically the magnet should be 6mm in diameter and ≥2.5mm in height. Magnetic materials such as rare earth AlNiCo, SmCo5 or NdFeB are recommended. The magnet’s field strength perpendicular to the die surface should be verified using a gauss-meter. The magnetic field given distance, along a concentric circle with a radius of 1.1mm (R1), should be in the range of ± ...

Page 21

... AS5043 Data Sheet – Choosing the Proper Magnet 15.1.1 Magnet Placement The magnet’s center axis should be aligned within a displacement radius R with reference to the edge of pin #1 (see Figure 19). This radius includes the placement tolerance of the chip within the SSOP-16 package (+/- 0.235mm). ...

Page 22

... The ±0.5° angular error assumes a magnet optimally aligned over the center of the die and is a result of gain mismatch errors of the AS5043. Placement tolerances of the die within the package are ±0.235mm in X and Y direction, using a reference point of the edge of pin #1 (Figure 21). ...

Page 23

... Power Supply Failure Detection By software: If the power supply to the AS5043 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 ...

Page 24

... AS5043 Data Sheet – Angular Output Tolerances 18 Angular Output Tolerances 18.1 Accuracy; Digital Outputs Accuracy is defined as the error between measured angle and actual angle influenced by several factors: the non-linearity of the analog-digital converters, internal gain and mismatch errors, non-linearity due to misalignment of the magnet As a sum of all these errors, the accuracy with centered magnet = (Err degrees @ 25° ...

Page 25

... High Speed Operation 18.4.1 Sampling Rate The AS5043 samples the angular value at a rate of 10.42k samples per second (ksps) in fast mode and 2.61ksps in slow mode. Consequently, a new reading is performed each 96µs. (fast mode) or 384µs (slow mode). ...

Page 26

... The analog output produces no further delay, the output voltage will be updated as soon available. Using the SSI interface for data transmission, an additional delay must be considered, caused by the asynchronous sampling (0….1/f ) and the time it takes the external control unit to read and process the angular data from the AS5043. sample 18.5.1 Angular Error Caused by Propagation Delay A rotating magnet will cause an angular error caused by the propagation delay ...

Page 27

... Temperature 18.7.1 Magnetic Temperature Coefficient One of the major benefits of the AS5043 compared 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 coefficients, the AS5043 automatically compensates for the varying magnetic field strength over temperature. The magnet’s temperature drift does not need to be considered, as the AS5043 operates with magnetic field strengths from ± ...

Page 28

... AS5043 Data Sheet – Electrical Characteristics 19 Electrical Characteristics 19.1 Absolute Maximum Ratings (non operating) Stresses beyond those listed under “Absolute Maximum Ratings“ may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under “ ...

Page 29

... AS5043 Data Sheet – Electrical Characteristics 19.3.2 CMOS Input: Program Input (Prog) (operating conditions -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless amb otherwise noted) Parameter High level input voltage High level input voltage Low level input voltage Pull-down high level input current 19 ...

Page 30

... AS5043 Data Sheet – Electrical Characteristics 19.3.6 OPAMP Output Stage Parameter Symbol VDD5V Power Supply Range Parallel Load CL Capacitance Parallel Load Resistance RL Open Loop Gain A0 VosOP Offset Voltage RTI Output Range Low VoutL Output Range High VoutH Isink Current capability sink ...

Page 31

... AS5043 Data Sheet – Electrical Characteristics 19.5 Electrical System Specifications (operating conditions -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) amb unless otherwise noted) Parameter Symbol * Resolution RES Integral non-linearity INL * (optimum) Integral non-linearity INL * (optimum) * Integral non-linearity INL * Differential non-linearity ...

Page 32

... AS5043 Data Sheet – Electrical Characteristics Figure 24: Integral and Differential Non-Linearity (exaggerated curve) α 10bit code 1023 512 0 0 ° 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. ...

Page 33

... AS5043 Data Sheet – Electrical Characteristics Parameter Load programming data Rise time of V before CLK PROG PROG Hold time of V after CLK PROG PROG Write data – programming CLK PROG CLK pulse width Hold time of Vprog after programming Programming voltage Programming voltage off level ...

Page 34

... L 0.63 0.75 0.95 21 Packing Options Delivery: Tape and Reel (1 reel = 2000 devices) Tubes (1 box = 100 tubes á 77 devices) Order # AS5043ASSU for delivery in tubes Order # AS5043ASST for delivery in tape and reel www.austriamicrosystems.com AYWWIZZ AS5043 inch Min Typ Max .068 .073 .078 ...

Page 35

... AS5043 Data Sheet – Recommended PCB Footprint 22 Recommended PCB Footprint Recommended Footprint Data mm inch A 9.02 0.355 B 6.16 0.242 C 0.46 0.018 D 0.65 0.025 E 5.01 0.197 www.austriamicrosystems.com Revision 1.80 35 – 36 ...

Page 36

... AS5043 Data Sheet – Contact Information Copyrights Copyright © 1997-2009, 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. ...

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