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參數(shù)資料
| 型號： | A1190LUA-T |
| 元件分類： | 磁阻傳感器 |
| 英文描述： | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-20mT, RECTANGULAR, THROUGH HOLE MOUNT |
| 封裝： | 1.50 X 4 MM, 3 MM HEIGHT, LEAD FREE, SIP-3 |
| 文件頁數(shù)： | 17/18頁 |
| 文件大?。?/td> | 427K |
| 代理商： | A1190LUA-T |
Figure 2. Typical application circuits
GND
A119x
VCC
V+
0.01 μF
A
GND
ECU
Package UA Only
A
RSENSE
CBYP
GND
A119x
VCC
V+
0.01 μF
A
GND
RSENSE
CBYP
(A) Low side sensing
(B) High side sensing
Figure 3. Chopper stabilization circuit (Dynamic Quadrature Offset Cancellation)
Amp
Regulator
Clock/Logic
Hall Element
Sa
mp
le
an
d
Ho
ld
Low-Pass
Filter
Chopper Stabilization Technique
When using Hall-effect technology, a limiting factor for
switchpoint accuracy is the small signal voltage developed
across the Hall element. This voltage is disproportionally small
relative to the offset that can be produced at the output of the
Hall sensor IC. This makes it difficult to process the signal while
maintaining an accurate, reliable output over the specified oper-
ating temperature and voltage ranges. Chopper stabilization is
a unique approach used to minimize Hall offset on the chip. The
patented Allegro technique, namely Dynamic Quadrature Offset
Cancellation, removes key sources of the output drift induced by
thermal and mechanical stresses. This offset reduction technique
is based on a signal modulation-demodulation process. The
undesired offset signal is separated from the magnetic field-
induced signal in the frequency domain, through modulation.
The subsequent demodulation acts as a modulation process for
the offset, causing the magnetic field-induced signal to recover
its original spectrum at base band, while the DC offset becomes
a high-frequency signal. The magnetic-sourced signal then can
pass through a low-pass filter, while the modulated DC offset is
suppressed. The chopper stabilization technique uses a 350 kHz
high frequency clock. For demodulation process, a sample and
hold technique is used, where the sampling is performed at twice
the chopper frequency. This high-frequency operation allows
a greater sampling rate, which results in higher accuracy and
faster signal-processing capability. This approach desensitizes
the chip to the effects of thermal and mechanical stresses, and
produces devices that have extremely stable quiescent Hall out-
put voltages and precise recoverability after temperature cycling.
This technique is made possible through the use of a BiCMOS
process, which allows the use of low-offset, low-noise amplifiers
in combination with high-density logic integration and sample-
and-hold circuits.
Programmable, Chopper-Stabilized,
Two Wire Hall-Effect Switches
A1190, A1192,
and A1193
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A1192LUA-T | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-20mT, RECTANGULAR, THROUGH HOLE MOUNT |
| A1210LLHLT-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -15-15mT, 400mV, RECTANGULAR, SURFACE MOUNT |
| A1211ELHLT-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -18-18mT, 400mV, RECTANGULAR, SURFACE MOUNT |
| A1212EUA-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -17.5-17.5mT, 400mV, RECTANGULAR, THROUGH HOLE MOUNT |
| A1213ELHLT-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -20-20mT, 400mV, RECTANGULAR, SURFACE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A1190LUBTN-T | 功能描述:2-WIRE FIELD PROGRAMMABLE SWITCH 制造商:allegro microsystems, llc 系列:* 零件狀態(tài):新產(chǎn)品 標準包裝:1 |
| A1191 | 制造商:Quick 功能描述:SIP 25L 25mm Nozzle for 21-13205 and 21-13210 制造商:QUICK 功能描述:SIP 25L NOZZLE FOR QUICK957/957D |
| A-1191-1 | 功能描述:固態(tài)繼電器-工業(yè)安裝 DC SOLENOID RoHS:否 制造商:Crydom 控制電壓范圍:4 VDC to 32 VDC 負載電壓額定值:7 VDC to 72 VDC 負載電流額定值:160 A 觸點形式: 輸出設(shè)備:SSR 安裝風格:Panel |
| A1192 | 制造商:Quick 功能描述:SIP 50LNOZZLE FOR QUICK957/957D |
| A11927-01 | 制造商:LAIRD TECHNOLOGIES - THERMAL MATERIALS 功能描述:TGON 810 SA 18" X 23" 制造商:Laird Technologies Inc 功能描述:TGON 810 SA 18" X 23" 制造商:Laird Technologies Inc 功能描述:TGON 810,SA / 18 X 23 |
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