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| 型号： | AS5045 PB |
| 厂商： | ams |
| 文件页数： | 30/34页 |
| 文件大小： | 0K |
| 描述： | BOARD PROGRAM AS5045 |
| 标准包装： | 1 |
| 模块/板类型： | ZIF 插口 |
| 适用于相关产品： | AS5000 编程器，AS5045 |
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AS5045
Data Sheet
17.4 Propagation Delays
The propagation delay is the delay between the time that the sample is taken until it is converted and available as
angular data. This delay is 96μs in fast mode and 384μs in slow mode.
Using the SSI interface for absolute data transmission, an additional delay must be considered, caused by the
asynchronous sampling (0 … 1/f sample ) and the time it takes the external control unit to read and process the angular
data from the chip (maximum clock rate = 1MHz, number of bits per reading = 18).
17.4.1 Angular Error Caused by Propagation Delay
A rotating magnet will cause an angular error caused by the output propagation delay.
This error increases linearly with speed:
e sampling , = rpm ? 6 * prop . delay
where
e sampling = angular error [°]
rpm = rotating speed [rpm]
prop.delay = propagation delay [seconds]
Note: since the propagation delay is known, it can be automatically compensated by the control unit processing the
data from the AS5045.
17.5 Internal Timing Tolerance
The AS5045 does not require an external ceramic resonator or quartz. All internal clock timings for the AS5045 are generated by
an on-chip RC oscillator. This oscillator is factory trimmed to ± 5% accuracy at room temperature ( ± 10% over full temperature
range). This tolerance influences the ADC sampling rate and the pulse width of the PWM output:
Absolute output; SSI interface:
A new angular value is updated every 96μs (typ.) in fast mode and every 384μs (typ.) in slow mode.
PWM output:
A new angular value is updated every 400μs (typ.).
The PWM pulse timings T on and T off also have the same tolerance as the internal oscillator (see above).
If only the PWM pulse width T on is used to measure the angle, the resulting value also has this timing tolerance.
However, this tolerance can be cancelled by measuring both T on and T off and calculating the angle from the duty
cycle (see section 9):
( t on off t ) ? 1
Position =
t on ? 4097
+
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Revision 1.7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| AS5046 | 制造商:AMS 功能描述:AS Series 360 3.3 to 5 V SMT Programmable Magnetic Angle Encoder - SSOP-16 制造商:AMS 功能描述:AS Series 360?3.3 to 5 V SMT Programmable Magnetic Angle Encoder - SSOP-16 |
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