A3250ELT-T ALLEGRO [Allegro MicroSystems], A3250ELT-T Datasheet - Page 3

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A3250ELT-T

Manufacturer Part Number
A3250ELT-T
Description
Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches
Manufacturer
ALLEGRO [Allegro MicroSystems]
Datasheet
A3250
A3251
1
2
3
switchpoint has been achieved.
OPERATING CHARACTERISTICS valid over operating T
ELECTRICAL CHARACTERISTICS
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Fall Time
Chopping Frequency
Power-Up Time
Output Current Limit
Power-On State
MAGNETIC CHARACTERISTICS
Initial Operate Point
Temperature Drift of B
Hysteresis (B
PROGRAMMING CHARACTERISTICS
Programmable B
Number of Programming Bits
Resolution
TRANSIENT PROTECTION CHARACTERISTICS
Supply Zener Voltage
Supply Zener Current
Reverse Battery Current
Do not exceed TJ(max): Additional information on power derating is provided in the applications section.
Short-circuit protection is not intended for continuous operation; permanent damage may result.
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
Characteristic
OP
and
1
– B
OP
RP
Values
1,2
OP
)
3
V
B
Symbol
I
I
OUT(lim)
I
OUT(sat)
ΔB
OP(prog)
B
CC(off)
CC(on)
POS
I
I
B
V
B
OFF
RCC
t
V
f
RES
I
on
CC
t
t
hys
OP
C
Z
r
f
OP
Z
Running mode
I
V
A3250; B < B
A3251; B > B
A3250; B > B
A3251; B < B
R
R
V
Short-circuit protection
A3250; B < B
A3251; B < B
B
Package T
Package T
Switchpoint set
Programming lock
V
V
OUT
Field-Programmable, Chopper-Stabilized,
OUT
OUT
OP
CC
RCC
LOAD
LOAD
≤ 500 gauss
= 28 V
= 20 mA; Switch state = ON
= 24 V; Switch state = OFF
= HIGH
= –18 V, T
= 820 Ω, C
= 820 Ω, C
A
A
A
and V
range = J
range = L
RP
OP
OP
RP
RP
RP
Test Conditions
; V
; V
; V
; V
, t > t
, t > t
J
CC
< T
OUT
OUT
LOAD
LOAD
OUT
OUT
, unless otherwise specified
on
on
J(max)
= HIGH
= LOW
= HIGH
= LOW
= 10 pF
= 10 pF
Unipolar Hall-Effect Switches
115 Northeast Cutoff, Box 15036
Min.
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
–35
–20
4.2
5.0
5.0
60
50
28
HIGH
LOW
Typ.
175
340
4.0
4.0
6.0
6.0
7.0
20
90
13
18
13
6
1
Max.
≥350
10.0
10.0
–5.0
400
120
7.0
7.0
5.0
5.0
24
10
50
50
35
35
35
13
Units
kHz
mV
mV
mV
mA
mA
mA
mA
mA
mA
mA
μA
Bit
Bit
μs
μs
μs
G
G
G
G
G
G
V
V
3

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