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| 型號： | A1425LK |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 速度傳感器和接近開關(guān) |
| 英文描述： | High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal |
| 中文描述： | 高精度模擬集成濾波電容器和雙零速傳感器輸出信號通道 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 502K |
| 代理商： | A1425LK |
3
A1425-DS Rev. 0b
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal
A1425
OPERATING CHARACTERISTICS
Valid at T
A
= – 40
o
C to 150
o
C, T
J
≤
165°C; over operational air gap range and V
CC
within
operating range, unless otherwise noted. Typical operating parameters: V
CC
= 12 V and T
A
= 25°C.
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
V
CC
Operating; T
J
< T
J(max)
4.0
–
26.5
V
Supply Current
I
CC
–
4.2
7.0
mA
Output Saturation Voltage
V
OUT(SAT)
I
SINK
= 20 mA
–
140
400
mV
Output Leakage Current
I
OFF
V
OUT
= 24 V, B
diff
= 0
–
–
5
μA
PROTECTION COMPONENT CHARACTERISTICS
Reverse Supply Current
I
RCC
V
CC
= –18 V
–
–
–1
mA
Supply Zener Current
I
ZCC
V
CC
= 28 V
–
–
10
mA
Supply Zener Clamp Voltage
V
ZCC
I
CC
= 10 mA
1
, T
A
= 25°C
28
33
37
V
Output Zener Current
I
ZOUT
V
OUT
= 28 V
–
–
3
mA
Output Zener Clamp Voltage
V
ZOUT
I
OUT
= 3 mA, T
A
= 25°C
28
–
–
V
Output Short Circuit Current Limit
I
OUT(lim)
–
–
50
mA
RESPONSE CHARACTERISTICS
Power-On Time
2,6
t
PO
t
S
t
R
f
cu
f
cl
V
CC
> V
CC(min)
f
Bdiff
≥
100 Hz
Equal to t
PO
+ t
S
;
f
Bdiff
≥
100 Hz
–3 dB, single pole
–3 dB, single pole
–
4.5
9
ms
Settling Time
3,6
Response Time
6
Upper Corner Frequency
Lower Corner Frequency
0
–
–
–
–
50
59
–
20
ms
ms
kHz
Hz
4.5
30
–
OUTPUT CHARACTERISTICS
Output Rise Time
4
Output Fall Time
MAGNETIC CHARACTERISTICS
t
r
t
f
R
PU
= 1 k
, C = 10 pF
R
PU
= 1 k
, I
SINK
= 20 mA, C = 10 pF
–
–
–
–
200
200
ns
ns
Output Off Switchpoint
5,6
B
OP
B
diff
increasing, f
Bdiff
= 200 Hz, B
diff
= 50 Gp-p;
digital output signal switches low to high
B
diff
decreasing, f
Bdiff
= 200 Hz, B
diff
= 50 Gp-p;
digital output signal switches high to low
Differential p-p magnetic
fi
eld
–11
0
11
G
Output On Switchpoint
5,6
B
RP
–11
0
11
G
Applied Magnetic Field
6,7
1
Equivalent to I
CC(max)
+ 3 mA.
2
Time required to initialize device.
3
Time required for the output switchpoints to be within speci
fi
cation.
4
Output Rise Time will be dominated by the RC time constant.
5
For other sinusoidal signal frequencies and magnetic
fi
elds, –B
OP
= B
RP
= sin
α
(B
diff
2) ± 25%, where
α
is the phase shift shown in the Characteristic
Data section.
6
See De
fi
nitions of Terms section.
7
Exceeding the maximum magnetic
fi
eld may result in compromised absolute accuracy.
B
diff
50
–
1250
G
Preliminary - Subject to Change
Without Notice November 10, 2004
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