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Two-Wire True Zero-Speed Miniature Differential
Peak-Detecting Sensor IC with Continuous Calibration
A1642
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS T
A
 and V
CC
 within speci cation, unless otherwise noted
CHARACTERISTIC
Symbol
Test Conditions
Min.   Typ.
1
Max.   Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
2
V
CC
Operating; T
J
 < 165癈
4.0

24
V
Undervoltage Lockout
V
CC(UV)
 V
CC
 0 ?5 V and 5 ?0 V


4.0
V
Supply Zener Clamp Voltage    V
Z
I
CC
 = I
CC(max)
 + 3 mA; T
A
 = 25?/SPAN>C
28


V
Supply Zener Current
I
Z
Test conditions only; V
Z
 = 28 V


I
CC(max)
+
3 mA
mA
Supply Current
I
CC(Low)
A1642LKN-I1
4.0    6.0    8.0    mA
A1642LKN-I2, A1642LKN-I3
5.9    7.0    8.4    mA
I
CC(High)
A1642LKN-I1, A1642LKN-I3
12.0    14.0    16.0    mA
A1642LKN-I2
11.8    14.0    16.8    mA
Supply Current Ratio
I
CC(High)
/
 
I
CC(Low)
Ratio of high current to low current
1.85        3.05    
Reverse Battery Current
I
RCC
V
RCC
 = 18 V


5    mA
POWER-ON STATE CHARACTERISTICS
Power-On State
3
POS  t > t
PO
    I
CC(High)


Power-On Time
4
t
PO
f
OP
 < 100 Hz

1
2
ms
OUTPUT STAGE
Output Slew Rate
5
dI/dt  R
LOAD
 = 100 ? C
LOAD
 = 10 pF

14
    mA/約
Continued on the next page.
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