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参数资料
| 型号： | AS5045 DB V2 |
| 厂商： | ams |
| 文件页数： | 29/34页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO AS5045 |
| 标准包装： | 1 |
| 传感器类型： | 磁性，旋转位置 |
| 传感范围： | 360° |
| 接口： | USB |
| 电源电压： | 5V USB 或 9V |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板 |
| 已用 IC / 零件： | AS5045 |
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in fast mode (pin MODE = high) and 0.03 degrees rms (1 sigma) *1 in slow mode (pin MODE = low or
(1 sigma)
AS5045
Data Sheet
17.2 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
open).
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 implementing averaging of
readings. An averaging of 4 readings will reduce the transition noise by 6dB or 50%, e.g. from 0.03°rms to
0.015°rms (1 sigma) in slow mode.
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 lowering 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.
*1
: statistically, 1 sigma represents 68.27% of readings, 3 sigma represents 99.73% of readings.
17.3 High Speed Operation
17.3.1 Sampling Rate
The AS5045 samples the angular value at a rate of 2.61k (slow mode) or 10.42k (fast mode, selectable by pin
MODE) samples per second. Consequently, the absolute outputs are updated each 384μs (96μs in fast mode).
At a stationary position of the magnet, the sampling rate creates no additional error.
Absolute Mode
At a sampling rate of 2.6kHz/10.4kHz, the number of samples (n) per turn for a magnet rotating at high speed can be
calculated by
n slow mod e =
n fast mod e =
60
rpm ? 384 μ s
60
rpm ? 96 μ s
The upper speed limit in slow mode is ~6.000rpm and ~30.000rpm in fast mode. The only restriction at high speed is
that there will be fewer samples per revolution as the speed increases (see Table 2 ).
Regardless of the rotational speed, the absolute angular value is always sampled at the highest resolution of 12 bit.
www.austriamicrosystems.com
Revision 1.7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS5045-EK-AB | 制造商:ams 功能描述:BOARD ADAPTER AS5045 |
| AS5045-SS_EK_AB | 功能描述:AS5045 - Magnetic, Rotary Position Sensor Evaluation Board 制造商:ams 系列:- 零件状态:有效 传感器类型:磁性，旋转位置 感应范围:360° 接口:串行 灵敏度:- 电压 - 电源:9V 嵌入式:否 所含物品:板 使用的 IC/零件:AS5045 标准包装:1 |
| AS5045-SS_EK_DB | 功能描述:AS5045 - Magnetic, Rotary Position Sensor Evaluation Board 制造商:ams 系列:- 零件状态:有效 传感器类型:磁性，旋转位置 感应范围:360° 接口:USB 灵敏度:- 电压 - 电源:5V USB 或 9V 嵌入式:是，MCU，8 位 所含物品:板 使用的 IC/零件:AS5045 标准包装:1 |
| AS5045TR | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER |
| AS5045-Z | 制造商:AMS 功能描述:0 |
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