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| 型号： | ATS636LSETN |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/16页 |
| 文件大小： | 546K |
| 描述： | IC SENSOR GEAR TOOTH 4-SIP |
| 标准包装： | 450 |
| 传感范围： | 0.25mm ~ 6mm |
| 类型： | 线性 - 可编程 |
| 电源电压： | 4.2 V ~ 24 V |
| 电流 - 电源： | 5.5mA |
| 电流 - 输出（最大）： | 20mA |
| 输出类型： | 数字，开路集电极 |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 4-SIP |
| 供应商设备封装： | 4-SIP |
| 包装： | 带卷 (TR) |
Programmable Back Biased Hall-Effect
Switch with TPOS Functionality
8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ATS636LSE
Functional Description
Chopper-Stabilized Technique
The basic Hall element is a small sheet of semiconductor material
in which a constant bias current will flow when a constant volt-
age source is applied. The output will take the form of a voltage
measured across the width of the sheet and will have negligible
value in the absence of a magnetic field. When a magnetic field
with flux lines at right angles to the Hall current is applied, a
small signal voltage directly proportional to the strength of the
magnetic field will occur at the output terminals.
This signal voltage is proportionally small relative to the offset
produced at the input of the chip. This makes it very difficult
to process the signal and maintain an accurate, reliable output
over the specified temperature and voltage range. Therefore, it is
important to reduce any offset on the signal that could be ampli-
fied when the signal is processed.
Chopper stabilization is a unique approach used to minimize
input offset on the chip. This technique removes a key source of
output drift with temperature and stress, and produces a 3?reduc-
tion in offset over other conventional methods.
This offset reduction chopping technique is based on a signal
modulation-demodulation process. The undesired offset signal is
separated from the magnetically induced signal in the frequency
domain. The offset (and any low frequency noise) component of
the signal can be seen as signal corruption added after the signal
modulation process has taken place. Therefore, the DC offset is
not modulated and remains a low frequency component. Con-
sequently, the signal demodulation process acts as a modulation
process for the offset causing the magnetically induced signal
to recover its original spectrum at baseband while the DC offset
becomes a high frequency signal. Then, using a low pass filter,
the signal passes while the modulated DC offset is suppressed.
The advantage of this approach is significant offset reduction,
which desensitizes the chip against the effects of temperature and
stress. The disadvantage is that this technique features a demodu-
lator that uses a sample and hold block to store and recover the
signal. This sampling process can slightly degrade the signal-to-
noise Ratio (SNR) by producing replicas of the noise spectrum at
the baseband. The degradation is a function of the ratio between
the white noise spectrum and the sampling frequency. The effect
of the degradation of the SNR is higher jitter, a.k.a. signal repeat-
ability. In comparison to a continuous time device, the jitter spec
can be increased by a factor of five.
Regulator
Amplifier
Sample/
Hold
Clock
Hall Element
Figure 1. Concept of Chopper-Stabilization Algorithm
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ATS636LSETN-T | 功能描述:IC HALL EFFECT SWITCH TPOS 4-SIP 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 |
| ATS-638194300 | 制造商:MOLEX 制造商全称:Molex Electronics Ltd. 功能描述:Hand Crimp Tool for Wire-to-Board Terminal, 28-30 AWG Wire for Loose Parts Only |
| ATS-638194400 | 制造商:MOLEX 制造商全称:Molex Electronics Ltd. 功能描述:A full cycle ratcheting hand tool ensures complete crimps |
| ATS-638230100 | 制造商:MOLEX 制造商全称:Molex Electronics Ltd. 功能描述:Hand Tool for 1.20mm Crimp Terminals, 30 AWG Wire for Reeled Product |
| ATS640A | 功能描述:晶体 64MHz 20pF 3OT -20C +70C RoHS:否 制造商:AVX 频率:26 MHz 容差: 频率稳定性:50 PPM 负载电容:8 pF 端接类型:SMD/SMT 封装 / 箱体:1210 (3225 metric) 工作温度范围:- 40 C to + 150 C 尺寸:2.5 mm W x 3.2 mm L x 0.85 mm H 封装:Reel |
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