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參數資料
| 型號： | TLE4942-2C |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Differential Two-Wire Hall Effect Sensor IC |
| 中文描述： | 差分兩線霍爾效應傳感器IC |
| 文件頁數： | 2/9頁 |
| 文件大?。?/td> | 802K |
| 代理商： | TLE4942-2C |
TLE4942-2, TLE4942-2C Supplement
TLE4942-2 - TLE4942-2C Data sheet supplement
February 2002
2
1
Functional description
offset
correction
peak detection
offset= (max + min) / 2
uncalibrated mode
calibrated mode
d1
initial
settling
time
d1
d2
d2
d2
standstill
pulse
(cut off)
PGA
switching
0
1
2
3
4
5
6
7
Fig. 1: example for start-up behaviour
Uncalibrated mode:
Occasionally a short initial offset settling time t
d,input
might delay the detection of the
input signal. (The sensor is "blind").
The magnetic input signal is tracked by the speed ADC and monitored within the
digital circuit. For detection the signal transient needs to exceed a threshold (digital
noise constant d1). When the signal slope is identified as a rising edge (or falling
edge), a comparator is triggered. The comparator is triggered again as soon as a
falling edge (or rising edge respectively) is detected
(
and vice versa). Depending on
the initial state of the comparator the IC output is first triggerd on the first or second
detected edge.
Between the startup of the magnetic input signal and the time when its second
extreme is reached, the PGA (programmable gain amplifier) will switch to its
appropriate position. This value is determined by the signal amplitude and initial
offset value. The digital noise constant value is changing accordingly (d1
→
d2),
leading to a change in phase shift between magnetic input signal and output signal.
After that consecutive output pulses should have a nominal delay of about 180°.
During the uncalibrated mode the offset value is calculated by the peak detection
algorithm as described in the TLE4942 data sheet.
Transition to calibrated mode:
In the calibrated mode the phase shift between input and output signal is no longer
determined by the ratio between digital noise constant and signal amplitude.
Therefore a sudden change in the phase shift may occur during the transition from
uncalibrated to calibrated mode.
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相關代理商/技術參數 |
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| TLE4942C | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Differential Two-Wire Hall Effect Sensor IC |
| TLE4943C | 制造商:Infineon Technologies AG 功能描述: |
| TLE4945 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Uni- and Bipolar Hall IC Switches for Magnetic Field Applications |
| TLE4945-2G | 功能描述:板機接口霍耳效應/磁性傳感器 Bipolar 4V - 24V 5 mA RoHS:否 制造商:Honeywell 類型:Bipolar Hall-Effect Digital Position Sensor 工作電源電壓:3 V to 24 V 電源電流:3.5 mA 最大輸出電流:20 mA 工作點最小值/最大值:5 G, 55 G 最小/最大釋放點（Brp）:- 55 G, - 5 G 最大工作溫度:+ 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23 |
| TLE49452GNT | 制造商:Infineon Technologies AG 功能描述:Hall Effect Sensor 100mA Bipolar 5V/9V/12V/15V/18V 4-Pin(3+Tab) SOT-89 T/R |
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