参数资料
型号: A3250LUA
厂商: Allegro Microsystems Inc
文件页数: 4/16页
文件大小: 300K
描述: IC SW HALL EFFECT UNI 3-SIP
标准包装: 500
传感范围: 50G
类型: 单极开关
电源电压: 4.2 V ~ 24 V
电流 - 电源: 10mA
电流 - 输出(最大): 20mA
输出类型: 数字,开路集电极
特点: 稳压电压
工作温度: -40°C ~ 150°C
封装/外壳: 3-SIP
供应商设备封装: 3-SIP
包装: 散装
Field-Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switches
A3250 and
A3251
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
OPERATING CHARACTERISTICS valid over operating T
A
 and V
CC
, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.   Typ.   Max.   Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
1
V
CC
Running mode
4.2

24
V
Output Saturation Voltage
V
OUT(sat)
I
OUT
 = 20 mA; Switch state = ON

175    400    mV
Output Leakage Current
I
OFF
V
OUT
 = 24 V; Switch state = OFF


10    糀
Supply Current
I
CC(off)
A3250; B < B
RP
; V
OUT
 = HIGH

4.0    7.0    mA
A3251; B > B
OP
; V
OUT
 = HIGH

4.0    7.0    mA
I
CC(on)
A3250; B > B
OP
; V
OUT
 = LOW

6.0    10.0    mA
A3251; B < B
RP
; V
OUT
 = LOW

6.0    10.0    mA
Output Rise Time
t
r
R
LOAD
 = 820 ? C
LOAD
 = 10 pF


5.0    約
Output Fall Time
t
f
R
LOAD
 = 820 ? C
LOAD
 = 10 pF


5.0    約
Chopping Frequency
f
C

340
    kHz
Power-Up Time
t
on
V
OUT
 = HIGH

20
50
Output Current Limit
1,2
I
OUT(lim)
Short-circuit protection
60
90    120    mA
Power-On State
POS
A3250; B < B
RP
, t > t
on
    HIGH    
mV
A3251; B < B
RP
, t > t
on
    LOW    
mV
MAGNETIC CHARACTERISTICS
Initial Operate Point
B
OP
20    13
50
G
Temperature Drift of B
OP
OP
B
OP
 d 500 gauss
35

35
G
Hysteresis (B
OP
  B
RP
)
B
hys
Package T
A
 range = J
5.0    18
35
G
Package T
A
 range = L
5.0    13
35
G
PROGRAMMING CHARACTERISTICS
Programmable B
OP
 
Values
3
B
OP(prog)
50
    e350    G
Number of Programming Bits

Switchpoint set

6

Bit
Programming lock

1

Bit
Resolution
B
RES

7.0

G
TRANSIENT PROTECTION CHARACTERISTICS
Supply Zener Voltage
V
Z
28


V
Supply Zener Current
I
Z
V
CC
 = 28 V


13    mA
Reverse Battery Current
I
RCC
V
RCC
 = 18 V, T
J
 < T
J(max)

    5.0    mA
1
 Do not exceed T
J
(max): Additional information on power derating is provided in the applications section.
2
 Short-circuit protection is not intended for continuous operation; permanent damage may result.
3
 Device can be used below 50 G but is not guaranteed to be a unipolar switch. It is the responsibility of the programmer to verify that the desired
switchpoint has been achieved.
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