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| 型号： | AS5304B-ATSU |
| 厂商： | ams |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC ENCODER LINEAR 20-TSSOP |
| 应用说明： | AS5000 Series Magnet Selection Guide AS5000 Series Magnets for Extended Vertical Range |
| 标准包装： | 74 |
| 传感范围： | 5mT ~ 60mT |
| 类型： | 线性，旋转编码器 - 可编程 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电流 - 电源： | 35mA |
| 电流 - 输出（最大）： | 14mA |
| 输出类型： | 正交，带刻度角（增量） |
| 特点： | 高速度 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 804 (CN2011-ZH PDF) |
AS5304/AS5306 Integrated Hall IC for linear and off-axis rotary motion detection
7.2
3.
It is therefore recommended to continue to the next (second) index position from the end of the strip (Index = high,
A=B= high). This position can now be used as a defined home position.
Incremental Hysteresis
Incremental
output
X +4
Hysteresis:
1 LSB
If the magnet is sitting right at the transition point between two steps, the
noise in the system may cause the incremental outputs to jitter back and
forth between these two steps, especially when the magnetic field is
weak.
X +3
X +2
X +1
Magnet position
To avoid this unwanted jitter, a hysteresis has been implemented. The
hysteresis lies between 1 and 2 LSB, depending on device scattering.
lateral position of the magnet as it scans across the IC, the vertical axis
is the change of the incremental outputs, as they step forward (blue line)
X
X
X+1
X+2
X+3
X+4
with movement in +X direction and backward (red line) in – X direction.
Movement direction: +X
Movement direction: -X
Note: 1LSB = 25μm for AS5304, 15μm for AS5306
Figure 8:
7.3
Hysteresis of the incremental output
Integral Non-Linearity (INL)
The INL (integral non-linearity) is the deviation between indicated position and actual position. It is better than 1LSB for both
AS5304 and AS5306, assuming an ideal magnet. Pole length variations and imperfections of the magnet material, which lead to
a non-sinusoidal magnetic field will attribute to additional linearity errors.
7.3.1
Error Caused by Pole Length Variations
AS5304 Systematic Linearity Error caused by Pole
Length Deviation
140
120
100
80
60
40
20
0
Error [μm]
pole length of the multi-pole strip or ring.
This is less of an issue with strip magnets, as they can be
manufactured exactly to specification using the proper
magnetization tooling.
1500
1700
1900
2100
2300
2500
Pole Length [μm]
Figure 9:
Additional error caused by pole length variation: AS5304
AS5306 Systematic Linearity Error caused by Pole
Length Deviation
However, when using a ring magnet (see Figure 1) the pole
140
120
100
80
60
40
Error [μm]
length differs depending on the measurement radius. For
optimum performance it is therefore essential to mount the
IC such that the Hall sensors are exactly underneath the
magnet at the radius where the pole length is 2.0mm
(AS5304) or 1.2mm (AS5306), see also 8.1.2.
20
0
900
1000
1100
1200
1300
1400
1500
Note that this is an additional error, which must be added to
the intrinsic errors INL (see 7.3) and DNL (see 7.4).
Pole Length [μm]
Figure 10:
Additional error caused by pole length variation: AS5306
Revision 1.9
www.ams.com
Page 8 of 14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS5304-DK-1.0 | 功能描述:BOARD DEMO AS5304 RoHS:否 类别:编程器，开发系统 >> 评估板 - 传感器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| AS5304-DK-ST-1.0 | 制造商:ams 功能描述:Demo Board |
| AS5304-TS_EK_AB | 功能描述:AS5304A, AS5304B - Magnetic, Linear, Rotary Position Sensor Evaluation Board 制造商:ams 系列:- 零件状态:有效 传感器类型:磁性，线性，旋转位置 感应范围:- 接口:模拟 灵敏度:- 电压 - 电源:4.5 V ~ 5.5 V 嵌入式:- 所含物品:板 使用的 IC/零件:AS5304A，AS5304B 标准包装:1 |
| AS5304-TS_EK_DB | 功能描述:AS5304/B - Hall Effect Sensor Evaluation Board 制造商:ams 系列:- 零件状态:有效 传感器类型:霍尔效应 感应范围:5mT 跳闸，60mT 释放 接口:- 灵敏度:- 电压 - 电源:9V 嵌入式:否 所含物品:2 个板，电池，夹具，磁条 使用的 IC/零件:AS5304/B 标准包装:1 |
| AS5305 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Integrated Hall IC for Linear and Off-Axis Rotary Motion Detection |
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