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| 型號： | A1181 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Two-Wire, Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switch |
| 中文描述： | 兩線，可編程，斬波穩(wěn)定，單極霍爾效應(yīng)開關(guān) |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 356K |
| 代理商： | A1181 |
4
A1180-DS, Rev. 2
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall Effect Switches
A1180/81/82/83
MAGNETIC CHARACTERISTICS1 over the operating voltage and temperature range, unless otherwise specied
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Programmable Operate Point Range
BOPrange
ICC = ICC(H) for A1180 and A1182
ICC = ICC(L) for A1181 and A1183
60
–
200
G
Initial Operate Point Range
BOPinit
VCC = 12 V
–
33
60
G
Switchpoint Step Size2
BRES
VCC = 5 V, TA = 25°C
4
8
12
G
Number of Programming Bits
–
Switchpoint setting
–
5
–
Bit
Programming locking
–
1
–
Bit
Temperature Drift of BOP
ΔBOP
–
±20
G
Hysteresis
BHYS
BHYS = BOP – BRP
515
30
G
1Relative values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic
polarity; therefore greater B values indicate a stronger south polarity eld (or a weaker north polarity eld, if present).
2The range of values specied for BRES is a maximum, derived from the cumulative programming bit errors.
ELECTRICAL CHARACTERISTICS over the operating voltage and temperature range, unless otherwise specied
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage1
VCC
Device powered on
3.5
–
24
V
Supply Current2
ICC(L)
B >BOP for A1180; B <BRP for A1181
2
–
5
mA
B >BOP for A1182; B <BRP for A1183
5
–
6.9
mA
ICC(H)
B >BOP for A1181, A1183
B <BRP for A1180, A1182
12
–
17
mA
Supply Zener Clamp Voltage
VZ(supply)
ICC = ICC(L)(max) + 3 mA; TA = 25°C
28
–
40
V
Supply Zener Clamp Current
IZ(supply)
VZ(supply) = 28 V
–
ICC(L)(max)
+ 3 mA
mA
Reverse Supply Current
IRCC
VRCC = –18 V
–
–1.6
mA
Output Slew Rate3
di/dt
No bypass capacitor; capacitance of the
oscilloscope performing the measurement
= 20 pF
–
36
–
mA/μs
Chopping Frequency
fC
–
200
–
kHz
Power-On Time4
ton
After factory trimming; with and without
bypass capacitor (CBYP = 0.01 μF)
––
25
μs
Power-On State5,6
POS
ton ≤ ton(max); VCC slew rate ≥ 25 mV/μs
–
HIGH
–
1VCC represents the generated voltage between the VCC pin and the GND pin.
2Relative values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic
polarity; therefore greater B values indicate a stronger south polarity eld (or a weaker north polarity eld, if present).
3Measured without bypass capacitor between VCC and GND. Use of a bypass capacitor results in slower current change.
4Measured with and without bypass capacitor of 0.01 μF. Adding a larger bypass capacitor causes longer Power-On Time.
5POS is dened as true only with a VCC slew rate of 25 mV/μs or greater. Operation with a VCC slew rate less than 25 mV/μs can permanently harm
device performance.
6POS is undened for t > ton or BRP < B < BOP.
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