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| 型号： | AS5134-ZSST |
| 厂商： | ams |
| 文件页数： | 26/33页 |
| 文件大小： | 0K |
| 描述： | IC ENCODER PROG 20-SSOP |
| 应用说明： | AS5000 Series Magnet Selection Guide AS5000 Series Magnets for Extended Vertical Range |
| 产品培训模块： | AS5134 Overview |
| 特色产品： | AS5134 High-Speed Magnetic Rotary Encoder |
| 标准包装： | 1 |
| 传感范围： | 20mT ~ 80mT |
| 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： | 22mA |
| 输出类型： | 数字，PWM |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 140°C |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 804 (CN2011-ZH PDF) |
| 其它名称： | AS5134-ZSSTDKR |
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AS5134
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
8.3 Multi Turn Counter
A 9-bit register is used for counting the magnet’s revolutions. With each zero transition in any direction, the output of a special counter is
incremented or decremented. The initial value after reset is 0 LSB. The multi turn value is encoded as complement on two. Clockwise rotation
gives increasing angle values and positive turn count. Counter clockwise rotation exhibits decreasing angle values and a negative turn count
respectively.
Bit Code
011111111
---
01111111
---
00000011
00000010
00000001
00000000
11111111
11111110
11111101
---
10000000
---
100000000
Decimal Value
256
---
127
---
+3
+2
+1
0
-1
-2
-3
---
-128
---
-255
The counter output can be reset by using command 20 – SET MT Counter. It is immediately reset by the rising clock edge of this bit. Any zero
crossing between the clock edge and the next counter readout changes the counter value.
8.4 High Speed Operation
The AS5134 is using a fast tracking ADC (TADC) to determine the angle of the magnet. Once the TADC is synchronized with the angle, it sets
the LOCK bit in the status register. In worst case, usually at start-up, the TADC requires up to 179 steps to lock. Once it is locked, it requires only
one cycle to track the moving magnet. The AS5134 can operate in locked mode at rotational speeds up to 76875 rpm.
In Low Power Mode, the position of the TADC is frozen. It will continue from the frozen position once it is powered up again. If the magnet has
moved during the power down phase, several cycles will be required before the TADC is locked again. The tracking time to lock in with the new
magnet angle can be roughly calculated as:
t LOCK = --------------------------------------------------------------------------
2 ? s ? NewAngle – OldAngle
1.406
Where:
t LOCK = Time required to acquire the new angle after power up from one of the reduced power modes [μs]
OldAngle = Angle position when one of the reduced power modes is activated [o]
NewAngle = Angle position after resuming from reduced power mode [o]
(EQ 1)
8.4.1
Propagation Delay
The Propagation delay is the time required from reading the magnetic field by the Hall sensors to calculating the angle and making it available on
the serial or PWM interface. While the propagation delay is usually negligible on low speeds, it is an important parameter at high speeds. The
longer the propagation delay, the larger becomes the angle error for a rotating magnet as the magnet is moving while the angle is calculated. The
position error increases linearly with speed. The main factors that contribute to the propagation delay are discussed in detail further in this
document.
www.austriamicrosystems.com/AS5134
Revision 2.3
25 - 32
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相关代理商/技术参数 |
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| AS5134-ZSST-500 | 功能描述:IC ENCODER RPTARY 20-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 |
| AS51370FLF | 制造商:TT Electronics / IRC 功能描述:AS51370FLF |
| AS51370HLF | 制造商:TT Electronics / IRC 功能描述:AS51370HLF |
| AS51370JLF | 制造商:TT Electronics / IRC 功能描述:AS51370JLF |
| AS51371FLF | 制造商:TT Electronics / IRC 功能描述:AS51371FLF |
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