PROGRAMMING CHARACTERISTICS Valid over full operating voltage range and T
A
= 25癈
, unless otherwise noted
Characteristics
Symbol
Test Conditions
Min. Typ. Max. Unit
1
PRE-PROGRAMMING TARGET
2
Pre-Programming Quiescent Duty Cycle
Output
D
(Q)PRE
B = 0 G
50
%
Pre-Programming Sensitivity
Sens
PRE
0.08
%/G
Pre-Programming PWM Output Carrier
Frequency
f
PWMPRE
150
Hz
QUIESCENT DUTY CYCLE PROGRAMMING
Initial Quiescent Duty Cycle Output
3
D
(Q)UNIinit
Unipolar device, B = 0 G
20
%
D
(Q)BIinit
Bipolar device, B = 0 G
D
(Q)PRE
%
Guaranteed Quiescent Duty Cycle
Programming Range
4
D
(Q)UNI
Unipolar device, B = 0 G
10
30
%
D
(Q)BI
Bipolar device, B = 0 G
40
60
%
Quiescent Duty Cycle Output
5
Programming Bits
Coarse (range programming)
1
bit
Fine (value adjustment)
9
bit
Average Quiescent Duty Cycle Output
Step Size
6,7
Step
D(Q)
0.055 0.075 0.095 %
Quiescent Duty Cycle Output
Programming Resolution
8
Err
PGD(Q)
Step
D(Q)
??.5
%
SENSITIVITY PROGRAMMING
Initial Sensitivity
Sens
init
Sens
PRE
%/G
Guaranteed Sensitivity Programming
Range
9
Sens
0.1
0.2 %/G
Sensitivity Programming Bits
8
bit
Average Sensitivity Step Size
6,7
Step
SENS
600 800 900 ?/G
Sensitivity Programming Resolution
8
Err
PGSENS
Step
SENS
??.5
?/G
CARRIER FREQUENCY PROGRAMMING
Initial Carrier Frequency
f
PWM(slow)init
19
Hz
f
PWM(fast)init
f
PWMPRE
Hz
Guaranteed Carrier Frequency
Programming Range
9
f
PWM(slow)
12
15.5 Hz
f
PWM(fast)
95
115 Hz
Coarse Carrier Frequency Programming
Bits
10
Coarse (range programming)
1
bit
Fine (value adjustment)
4
bit
Average Carrier Frequency Step Size
6,7
Step
fPWM(slow)
0.5 0.8 1.1
Hz
Step
fPWM(fast)
4.5 6.4 8.3
Hz
Carrier Frequency Programming
Resolution
8
Err
PGfPWM
Step
fPWM
??.5
Hz
Continued on the next page&
High Precision 2-Wire Linear Hall Effect Sensor IC
with Pulse Width Modulated Output
A1354
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
发布紧急采购，3分钟左右您将得到回复。
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