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參數(shù)資料
| 型號(hào)： | A1425 |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 速度傳感器和接近開(kāi)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(hào)通道 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 502K |
| 代理商： | A1425 |
4
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
THERMAL CHARACTERISTICS
may require derating at maximum conditions, see application information
Characteristic
Symbol
Minimum-K PCB (single-sided with copper limited to
solder pads)
Test Conditions
Min.
Typ.
Max Units
Package Thermal Resistance
R
θ
JA
177
–
–
oC/W
20
40
60
80
100
120
140
160
180
M
C
(
T
J(max)
= 165oC; I
CC
= I
CC(max)
Power Derating Curve
8
10
12
14
0
2
4
6
16
18
20
22
24
26
28
30
(R
θ
JA
= 177 oC/W)
Minimum-K PCB
V
CC(min)
V
CC(max)
20
40
60
80
Temperature (°C)
100
120
140
160
180
P
D
(
T
J(max)
= 165oC; V
CC
= V
CC(max)
;I
CC
= I
CC(max)
Maximum Power Dissipation, P
D(max)
(R
θ
JA
=177oCW
MnmumKPCB
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
The following provide additional information about some of
the parameters cited in the Operating Characteristics table.
For additional information, visit the Allegro Web site at
www.allegromicro.com
.
Applied Magnetic Field, B
diff
– The differential magnetic
fl
ux
density which is calculated as the arithmetic difference of the
fl
ux densities observed by each of the two Hall elements.
Output Off Switchpoint (Operate Point), B
OP
– The value of
increasing differential magnetic
fl
ux density at which the device
output switches from low to high. This value may be greater than
or less than 0 G.
Output On Switchpoint (Release Point), B
RP
– The value of
decreasing differential magnetic
fl
ux density at which the device
output switches from high to low. This value may be greater
than or less than 0 G.
Power-On Time, t
PO
– The time needed by the device, after
power is applied, to initialize all circuitry necessary for proper
operation.
Settling Time, t
S
– The time required by the device, after t
PO
,
and after a valid magnetic signal has been applied, to provide
proper output transitions. Settling time is a function of magnetic
offset, offset polarity, signal phase, signal frequency, and signal
amplitude.
Response Time – The total time required for generating zero-
crossing output transitions after power-up (the sum of power-on
time and settling time).
De
fi
nitions of Terms
Preliminary - Subject to Change
Without Notice November 10, 2004
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