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參數(shù)資料
| 型號： | A1374LKB |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | HIgh Precision, Output Pin Programmable Linear Hall Effect Sensors |
| 中文描述： | 高精度，輸出引腳可編程線性霍爾效應傳感器 |
| 文件頁數(shù)： | 15/23頁 |
| 文件大?。?/td> | 435K |
| 代理商： | A1374LKB |
15
A1373-DS, Rev. 3
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
High Precision, Output Pin Programmable, Linear Hall Effect Sensors
A1373 and A1374
Pulse Generation
Several parameters can be field-programmed. To do so, a coded
series of voltage pulses through the VOUT pin is used to set
bitfields in onboard registers. The effect on the device output can
be monitored, and the registers can be cleared and set repeat-
edly until the required output results are achieved. To make the
setting permanent, bitfield-level solid state fuses are blown, and
finally, a device-level fuse is blown, blocking any further coding.
Although any programmable variable power supply can be used
to generate the pulsed waveforms, Allegro highly recommends
using the Allegro Sensor Evaluation Kit, available on the Allegro
Web site On-line Store. The manual for that kit is available for
download free of charge, and provides additional information on
programming these devices.
There are four relative nominal voltage levels that must be taken
into account when programming. For purposes of explanation
in this document, the signal levels are referred to simply as high
programming voltage, V
PH
, midrange, V
PM
, and low, V
PL
. The
fourth voltage level, V
R
, is a very low level, near zero volts, used
to reset the bitfields that have not yet been isolated by blown
fuses.
The high level, V
PH
, pulse is maintained either for short duration
(
Δ
t
PH
= 1 to <<35
μ
s), acting as a strobe to signal the transition
between states, or for long duration (
Δ
t
PH
≥
35
μ
s) and used for
fuse-blowing. The device generates an internal pulse beginning
at the leading (rising) edge of a V
PH
pulse. The duration of the
internal pulse is the duration of the external V
PH
pulse,
Δ
t
PH
,
plus 15
μ
s. The added time is a buffer to compensate for volt-
age drop when the high current is sourced, ensuring that there
is sufficient power to blow the fuse completely. Before sending
another pulse, an additional guard band of 5
μ
s is recommended
to allow the signal to decay, for a total of at least 20
μ
s after the
end of any V
PH
pulse.
Δ
t
PH
is measured from the time when the
external signal voltage rises above 23.6 V to the time when it
falls below 19.4 V. The nominal level for V
PH
is 28 V.
1
<
Δ
t
PH
< 35 μs
Δ
t
PH
> 35 μs
External Pulses
on VOUT Pin
Internal Pulses
Logic 0
Logic 1
Change State
Bit setting pulses = 5 μs
State Change or Blow pulse =
Δ
t
PH
+15 μs
Note: Spurious bit-setting pulses are generated on first V > V
PL
after V
R
, and at last V
PL
.
Guard
Band
(20 μs)
Guard Band (6 μs)
V
PH
V
PM
V
PL
V
R
Blow Fuse
t
min
≥
50 μs
Blowing fuse
Programming Pulse Waveforms
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| A1374LKB-T | 功能描述:IC SENSOR HALL EFFECT PREC 3-SIP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應，數(shù)字式開關，線性，羅盤 (IC) 系列:- 標準包裝: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:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應商設備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A1374LKBTI | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:High Precision, Output Pin Programmable Linear Hall Effect Sensors |
| A1374LKBTI-T | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:High Precision, Output Pin Programmable Linear Hall Effect Sensors |
| A1375 | 制造商:HAKKO Corporation 功能描述: |
| A1375/P | 制造商:HAKKO Corporation 功能描述: |
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