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PDF AS5134 Data sheet ( Hoja de datos )
| Número de pieza | AS5134 | |
| Descripción | 360 Step Programmable High Speed Magnetic Rotary Encoder | |
| Fabricantes | austriamicrosystems AG | |
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Hay una vista previa y un enlace de descarga de AS5134 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
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AS5134
360 Step Programmable High Speed Magnetic
Rotary Encoder
1 General Description
2 Key Features
Data Sheet
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 for very low average power
consumption.
Figure 1. Block Diagram
360º contactless angular position encoding
Two digital 360 step (8.5 bit) absolute outputs: Serial
interface and Pulse width modulated (PWM) output
User programmable zero position, sensitivity
High speed: up to 30.000 rpm
Direct measurement of magnetic field strength
allows exact determination of vertical magnet dis-
tance
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 multiturn counter
Low power mode with fast startup
Wide magnetic field input range: 20 – 80 mT
Wide temperature range: - 40ºC to +140ºC
Small Pb-free package: SSOP 20
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.
VDD5V
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GND
U V W A B Index
Hall Array
&
Frontend
Amplifier
Commutation Incremental
Interface Interface
tracking
ADC &
Angle
Zero
Pos. Angle
decoder
Mag
AGC
AGC
PWM
Decoder
Multiturn
Counter
Absolute
Serial
Interface
(SSI)
power management
OTP
PWM
DIO
CS
CLK
C2
DX
PROG
www.austriamicrosystems.com
Revision 1.6
1 - 29
1 page  
AS5134
Data Sheet - Electrical Characteristics
6 Electrical Characteristics
TAMB = -40 to 140ºC, VDD5V = 4.5-5.5V, all voltages referenced to VSS, unless otherwise noted.
Table 3. Electrical Characteristics
Symbol
Parameter
Conditions
Min Typ Max Units
VDD Positive Supply Voltage
4.5
+5.5
V
No load on outputs. Supply current
IDD
Operating Current
can be reduced by using stronger
magnets.
15 mA
Ioff Power down current
Low Power Mode
120 µA
TJ Junction Temperature
System Parameters
170 ºC
N Resolution
8.5 Bit
1 Deg
TPwrUp
Power Up Time
Startup from zero
Startup from Low/Mid Power mode
≤4100
≤500
µs
ts
Tracking rate
Step rate of tracking ADC;
1 step = 1º
3.0
4
5,2
µs/
step
INLcm
Accuracy
Centered Magnet
-2
2
Within horizontal displacement
radius (4.4)
-3
3 Deg
tdelay
Propagation delay
17 22 µs
TN Transition noise
Peak-Peak
1.41 Deg
Magnet Specifications
MD Magnet diameter
Diametrically magnetized
6 mm
MT Magnet thickness
2.5 mm
Bi Magnetic Input Range
At chip surface 20 80
Vi Magnet rotation speed
To maintain locked state
30.000
B Magnetic field low detection
<20 <36
B Magnetic field high detection
>44 >80
Hall Array radius
1
Vertical distance of magnet
0,5 1 1,8
Max X-Y Offset between defined IC
Horizontal magnet displacement Package center and magnet axis
radius
Max X-Y Offset between chip
center and magnet axis
0.25
mm
0.48
PWM Output
NPWM
PWM resolution
1 Step = 1º
8.5 Bit
2
µs/
step
PWMIN
PWM pulse width
Angle = 0º (00H)
16 µs
PWMAX
PWM pulse width
Angle = 360º (FFH)
736 µs
PWP
www.DataSheet4fPUW.cMom
PWM period
PWM frequency
Programming Parameters
=1 / PWM period
750 µs
1.43 kHz
www.austriamicrosystems.com
Revision 1.6
5 - 29
5 Page 
AS5134
Data Sheet - Detailed Description
DCLK
DX
CS
DIO
DIO
command phase
data phase
timeout phase
tTO
1 2 3 4 5 6 7 8 22
t1
t0
t5
CMD4
CMD3
CMD2
CMD1 CMD0
t6
D15 D14 D1
D0
DIO read
DIO write
Serial 2-Wire Differential SSI Connection
With the addition of a RS-422 / RS-485 transceiver, a fully differential data transmission, according to the 21-bit SSI
interface standard is possible. To be compatible with this standard, the DCLK signal must be inverted. This is done by
reversing the Data+ and Data- lines of the transceiver.
Note: This type of transmission is read-only.
Figure 6. 2-Wire SSI Read-only Mode
+5V
VDD
VDD
DCLK
Output
VSS Input DI
MAX 3081 or similar
D+ D-
D- D+
D+ D+
D- D-
C2 VDD
DCLK
100n
DIO VSS
VSS
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Revision 1.6
11 - 29
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