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| 型号： | AS5140H-ASST |
| 厂商： | ams |
| 文件页数： | 30/38页 |
| 文件大小： | 1279K |
| 描述： | IC ENCODER ROTARY 10BIT 16-SSOP |
| 标准包装： | 2,000 |
| 传感范围： | 45mT ~ 75mT |
| 类型： | 线性，旋转编码器 - 可编程 |
| 电源电压： | 3 V ~ 3.6 V，4.5 V ~ 5.5 V |
| 电流 - 电源： | 21mA |
| 电流 - 输出（最大）： | 4mA |
| 输出类型： | 数字式，PWM，10 位串行 |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
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www.austriamicrosystems.com/AS5140H
Revision 1.4
29 - 37
AS5140H
Data Sheet - Detailed Description
Figure 23. Example of Linearity Error Over 360?/DIV>
7.12.2 Transition Noise
Transition noise is defined as the jitter in the transition between two steps. Due to the nature of the measurement principle (Hall sensors +
Preamplifier + ADC), there is always a certain degree of noise involved. This transition noise voltage results in an angular transition noise at the
outputs. It is specified as 0.06 degrees rms (1 sigma)
1
. This is the repeatability of an indicated angle at a given mechanical position. The
transition noise has different implications on the type of output that is used:
Absolute Output; SSI Interface: The transition noise of the absolute output can be reduced by the user by applying an averaging of read-
ings. An averaging of 4 readings will reduce the transition noise by 50% = 0.03?rms (1 sigma).
PWM Interface: If the PWM interface is used as an analog output by adding a low pass filter, the transition noise can be reduced by lower-
ing the cutoff frequency of the filter. If the PWM interface is used as a digital interface with a counter at the receiving side, the transition
noise may again be reduced by averaging of readings.
Incremental Mode: In incremental mode, the transition noise influences the period, width and phase shift of the output signals A, B and
Index. However, the algorithm used to generate the incremental outputs guarantees no missing or additional pulses even at high speeds (up
to 10.000 rpm and higher).
7.12.3 High Speed Operation
The AS5140H samples the angular value at a rate of 10.42k samples per second. Consequently, the incremental and the absolute outputs are
updated each by 96祍. At a stationary position of the magnet, this sampling rate creates no additional error.
Absolute Mode. With the given sampling rate of 10.4 kHz, the number of samples (n) per turn for a magnet rotating at high speed can be
calculated by:
n =
(EQ 6)
In practice, there is no upper speed limit. The only restriction is that there will be fewer samples per revolution as the speed increases.
Regardless of the rotational speed, the absolute angular value is always sampled at the highest resolution of 10 bit. Likewise, for a given number
of samples per revolution (n), the maximum speed can be calculated by:
rpm =
(EQ 7)
1. Statistically, 1 sigma represents 68.27% of readings; 3 sigma represents 99.73% of readings.
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
1 55 109 163 217 271 325 379 433 487 541 595 649 703 757 811 865 919 973
transition noise
Err
max
Err
min
60
rpm 96?/SPAN>s
?/DIV>
---------------- ---------- -
60
n 96?/SPAN>s
?/DIV>
---------------- --- -
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS5140H-ASST-500 | 功能描述:板机接口霍耳效应/磁性传感器 RoHS:否 制造商:Honeywell 类型:Bipolar Hall-Effect Digital Position Sensor 工作电源电压:3 V to 24 V 电源电流:3.5 mA 最大输出电流:20 mA 工作点最小值/最大值:5 G, 55 G 最小/最大释放点（Brp）:- 55 G, - 5 G 最大工作温度:+ 150 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23 |
| AS5140HASSU | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:10-Bit 360 Programmable Magnetic Rotary Encoder For High Ambient Temperatures |
| AS5140H-ASSU | 功能描述:IC ENCODER PROG 10-BIT 16-SSOP RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| AS5140H-DB | 制造商:ams 功能描述:AS5140H Demo Board |
| AS5140H-PB | 制造商:ams 功能描述:AS5140H Progamming Board |
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