A1351 반도체 회로 부품 판매점
High Precision Linear Hall Effect Sensor IC
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 Allegro MicroSystems |
A1351
High Precision Linear Hall Effect Sensor IC
with a Push/Pull, Pulse Width Modulated Output
Discontinued Product
This device is no longer in production. The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: April 30, 2012
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, contact Allegro Sales.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
A1351
High Precision Linear Hall Effect Sensor IC
with a Push/Pull, Pulse Width Modulated Output
Features and Benefits
•Pulse width modulated (PWM) output provides increased noise
immunity compared to an analog output
•1 mm case thickness provides greater coupling for current
sensing applications
•Push/pull output
•Customer-programmable offset and sensitivity
•Factory-programmed 0%/°C Sensitivity Temperature Coefficient
•Programmability at end-of-line
•Selectable unipolar or bipolar quiescent duty cycles
•Selectable sensitivity range between 0.055% and 0.095% D/G
•Temperature-stable quiescent duty cycle output and sensitivity
•Precise recoverability after temperature cycling
•Output duty cycle clamps provide short circuit diagnostic
capabilities
•Optional 50% D calibration test mode at device power-up
•Wide ambient temperature range: –40°C to 125°C
•Resistant to mechanical stress
Package: 4 pin SIP (suffix KT)
1 mm case thickness
Not to scale
Description
TheA1351 device is a high precision, programmable linear Hall
effect sensor IC with a pulse width modulated (PWM) output.
The duty cycle, D, of the PWM output signal is proportional
to an applied magnetic field. The A1351 device converts an
analog signal from its internal Hall element to a digitally
encoded PWM output signal. The coupled noise immunity of
the digitally encoded PWM output is far superior to the noise
immunity of an analog output signal. A simple RC network
can be used to convert the digital PWM signal back to analog
signal.
The BiCMOS, monolithic circuit inside of theA1351 integrates
a Hall element, precision temperature-compensating circuitry
to reduce the intrinsic sensitivity and offset drift of the Hall
element, a small-signal high-gain amplifier, proprietary
dynamic offset cancellation circuits, and PWM conversion
circuitry. The dynamic offset cancellation circuits reduce
the residual offset voltage of the Hall element. Hall element
offset is normally caused by device over molding, temperature
dependencies, and thermal stress. The high frequency offset
cancellation (chopping) clock allows for a greater sampling
rate, which increases the accuracy of the output signal and
results in faster signal processing capability.
Continued on the next page…
V+
VCC
CBYPASS
Functional Block Diagram
Regulator
VREG
1
2
2
1
PWM
Frequency Trim
PWM Carrier
Generation
Chopper
Switches
Amp
Signal
Recovery
Signal
Conditioning
Sensitivity
Trim
Temperature
Compensation
% Duty
Cycle
% Duty Cycle
Temperature
Coefficient
A1351-DS, Rev. 4
PWM
Modulation
Logic with
Push-Pull
Output
PWMOUT/
Programming
GND
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PDF 파일 내의 페이지 : 총 24 페이지
제조업체: Allegro MicroSystems
( allegro )
A1351 sensor
데이터시트 다운로드 :
[ A1351.PDF ]
[ A1351 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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