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AS5043ASSU 参数 Datasheet PDF下载

AS5043ASSU图片预览
型号: AS5043ASSU
PDF下载: 下载PDF文件 查看货源
内容描述: 可编程360磁性角度编码器与绝对SSI和模拟输出 [Programmable 360 Magnetic Angle Encoder with Absolute SSI and Analog Outputs]
分类和应用: 编码器
文件页数/大小: 36 页 / 720 K
品牌: AMSCO [ AMS(艾迈斯) ]
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AS5043  
Data Sheet – Functional Description  
6 Functional Description  
The AS5043 is manufactured in a CMOS standard process and uses a spinning current Hall technology for sensing the  
magnetic field distribution across the surface of the chip.  
The integrated Hall elements are placed in a circle around the center of the device and deliver a voltage representation of  
the magnetic field perpendicular to the surface of the IC.  
Through Sigma-Delta Analog / Digital Conversion and Digital Signal-Processing (DSP) algorithms, the AS5043 provides  
accurate high-resolution absolute angular position information. For this purpose a Coordinate Rotation Digital Computer  
(CORDIC) calculates the angle and the magnitude of the Hall array signals.  
The DSP is also used indicate movements of the magnet towards or away from the chip and to indicate, when the  
magnetic field is outside of the recommended range (status bits = MagInc, MagDec; hardware pin = MagRngn).  
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°/180°/90° or 45° angular range, external or internal DAC  
reference voltage, 0-100%*VDD or 10-90% *VDD analog output range, external or internal amplifier gain setting.  
The various output modes as well as a user programmable zero position can be programmed in an OTP register. As long  
as no programming voltage is applied to pin PROG, the new setting may be overwritten at any time and will be reset to  
default when power is cycled. To make the setting permanent, the OTP register must be programmed by applying a  
programming voltage.  
The AS5043 is tolerant to magnet misalignment and unwanted external magnetic fields due to differential measurement  
technique and Hall sensor conditioning circuitry.  
It is also tolerant to airgap and temperature variations due to Sin-/Cos- signal evaluation.  
Figure 3: AS5043 Block Diagram  
MagRNGn  
Mode  
Sin  
Ang  
Mag  
DO  
Cos  
CSn  
CLK  
DACref  
FB  
10  
-
Vout  
+
DACout  
Prog_DI  
www.austriamicrosystems.com  
Revision 1.80  
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