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參數(shù)資料
| 型號(hào)： | A3213ELHLT |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 霍爾效應(yīng)傳感器 |
| 英文描述： | MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCHES |
| 中文描述： | 微功耗，超靈敏霍爾開關(guān)外匯FECT |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 575K |
| 代理商： | A3213ELHLT |
3213
AND
3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
7
FUNCTIONAL DESCRIPTION
Low Average Power.
Internal timing circuitry activates the
sensor for 60
μ
s and deactivates it for the remainder of the
period (240
μ
s for the A3213xx and 60 ms for the A3214xx).
A short "awake" time allows for stabilization prior to the
sensor sampling and data latching on the falling edge of the
timing pulse. The output during the "sleep" time is latched in
the last sampled state. The supply current is not affected by
the output state.
Chopper-Stabilized Technique.
The Hall element can be
considered as a resistor array similar to a Wheatstone bridge.
A large portion of the offset is a result of the mismatching of
these resistors. These devices use a proprietary dynamic offset
cancellation technique, with an internal high-frequency clock
to reduce the residual offset voltage of the Hall element that is
normally caused by device overmolding, temperature depen-
dencies, and thermal stress. The chopper-stabilizing technique
cancels the mismatching of the resistor circuit by changing the
direction of the current flowing through the Hall plate using
CMOS switches and Hall voltage measurement taps, while
maintaing the Hall-voltage signal that is induced by the
external magnetic flux. The signal is then captured by a
sample-and-hold circuit and further processed using low-offset
bipolar circuitry. This technique produces devices that have an
extremely stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability after tempera-
ture cycling. This technique will also slightly degrade the
device output repeatability. A relatively high sampling
frequency is used in order that faster signals can be processed.
More detailed descriptions of the circuit operation can be
found in Technical Paper STP 97-10,
Monolithic Magnetic
Hall Sensor Using Dynamic Quadrature Offset Cancellation
and Technical Paper STP 99-1,
Chopper-Stabilized Amplifiers
With A Track-and-Hold Signal Demodulator
.
Dwg. WH-017-1
0
PERIOD
60
μ
s - "AWAKE"
"SLEEP"
I
DD(EN)
I
DD(DIS)
SAMPLE &
OUTPUT LATCHED
Dwg. EH-012-1
S
&
X
+V
+V
HALL
VOLTAGE
B
+
—
Dwg. AH-011-2
Operation.
The output of this device switches low (turns on)
when a magnetic field perpendicular to the Hall sensor exceeds
the operate point B
OPS
(or is less than B
OPN
). After turn-on,
the output is capable of sinking up to 1 mA and the output
voltage is V
OUT(ON)
. When the magnetic field is reduced below
the release point B
RPS
(or increased above B
RPN
), the device
output switches high (turns off). The difference in the mag-
netic operate and release points is the hysteresis (B
hys
) of the
device. This built-in hysteresis allows clean switching of the
output even in the presence of external mechanical vibration
and electrical noise.
As used here, negative flux densities are defined as less
than zero (algebraic convention) and -50 G is less than +10 G.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A3213ELHLT-T | 功能描述:IC SWITCH HALL EFFECT SOT23W RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A3213ELHLT-T-CUT | 制造商:Allegro MicroSystems LLC 功能描述: |
| A3213ELHLX-T | 功能描述:IC HALL EFFECT SWITCH SOT23W-3 RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A3213EUA | 功能描述:IC SWITCH HALL EFFECT 3-SIP RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A3213EUA-T | 功能描述:IC SWITCH HALL EFFECT 3-SIP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
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