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參數(shù)資料
| 型號： | A1351LKTTN-T |
| 廠商： | Allegro Microsystems Inc |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 663K |
| 描述： | IC SENSOR HALL EFFECT 4-SIP |
| 產(chǎn)品培訓(xùn)模塊： | Current Sensor |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感范圍： | 0.055% ~ 0.095% DC/G |
| 類型： | 線性 - 單極，雙極 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 電流 - 電源： | 10mA |
| 電流 - 輸出（最大）： | 1mA |
| 輸出類型： | 數(shù)字，推挽式 |
| 特點： | 高精度 |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 4-SIP |
| 供應(yīng)商設(shè)備封裝： | 4-SIP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1139 (CN2011-ZH PDF) |
| 其它名稱： | 620-1228-6 |
A1351
High Precision Linear Hall Effect Sensor IC
with a Push/Pull, Pulse Width Modulated Output
10
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Symmetry Sensitivity Error The magnetic sensitivity of an
A1351 device is constant for any two applied magnetic fields of
equal magnitude and opposite polarities.
Symmetry error, Sym
ERR
(%), is measured and defined as:
Sens
BPOS
Sens
BNEG
1
Sym
ERR
=
?SPAN class="pst A1351LKTTN-T_2172462_8">
100%
,
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
(13)
where Sens
Bx
is as defined in equation 4, and B
POS
and B
NEG
are
positive and negative magnetic fields such that |B
POS
| = |B
NEG
|.
Note that the symmetry error specification is only valid for bipolar
devices.
Duty Cycle Jitter The duty cycle of the PWM output may vary
slightly over time despite:
" the presence of a constant applied magnetic field, and
" a constant carrier frequency for the PWM signal.
This phenomenon is known as jitter, and is defined as:
%D
B
(max) %D
B
(min)
2
J
D
= ?/DIV>
,
(14)
where %D
B
(max) and %D
B
(min) are the maximum and mini-
mum duty cycles measured the over 1000 PWM clock periods
with a constant applied magnetic field. J
D
is given in %D (see
figure below).
Duty Cycle Resolution The ability to know the value of the
applied magnetic field from the device output is affected by jitter.
The resolution of the magnetic field, in Gauss (G), is defined as:
J
DC
Sens
RES
=
.
(15)
Jitter is instability or small rapid irregularity about a specific data position in
a periodic electrical signal waveform from cycle to cycle. In this figure, the
A1351 PWM Output jitter is ?.025% D at 25癈, Sens = 0.095% D/G.
t
PERIOD
盝itter
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