A1425LK-T Allegro Microsystems Inc, A1425LK-T Datasheet - Page 4

• Manufacturer Part Number: A1425LK-T
• Description: IC,HALL-EFFECT SWITCH,DIFFERENTIAL,SIP,4PIN,PLASTIC
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of A1425LK-T

• Rohs Compliant: YES
• Sensing Range: 11G Trip, -11G Release
• Voltage - Supply: 4 V ~ 26.5 V
• Current - Supply: 7mA
• Current - Output (max): 25mA
• Output Type: Digital, Open Collector
• Features: High Accuracy
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A1425
Defi nitions of Terms
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
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
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
decreasing differential magnetic fl ux density at which the device
30
28
26
24
22
20
18
16
14
12
10
THERMAL CHARACTERISTICS
Package Thermal Resistance
8
6
4
2
0
20
40
Characteristic
60
Power Derating Curve
80
Temperature (ºC)
(R
diff
θJA
100
– The differential magnetic fl ux
= 177 ºC/W)
High Accuracy Analog Speed Sensor IC with Integrated
Filter Capacitor and Dual Zero-Crossing Output Signal
120
RP
140
OP
may require derating at maximum conditions, see application information
– The value of
– The value of
Symbol
R
160
θJA
180
V
V
CC(max)
CC(min)
Single-layer PCB, with copper limited to solder pads
output switches from high to low. This value may be greater
than or less than 0 G.
Power-On Time, t
power is applied, to initialize all circuitry necessary for proper
operation.
Settling Time, t
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 t
ing zero-crossing output transitions after power-up (the sum of
power-on time and settling time).
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
Test Conditions
20
40
Settle
Maximum Power Dissipation, P
Response
PO
– The time required by the device, after t
60
– The time needed by the device, after
– The total time required for generat-
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Temperature (°C)
80
100
120
Rating Units
177
140
D(max)
160
ºC/W
180
PO
,
4