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Электронный компонент: A1182ELHLT-T

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A1180/81/82/83
A1180-DS, Rev. 2
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
AB SO LUTE MAX I MUM RAT INGS
Supply Voltage, V
CC
..........................................28 V
Reverse-Supply Voltage, V
RCC
........................18 V
Magnetic Flux Density, B .........................Unlimited
Operating Temperature
Ambient,
T
A
, Range E.................. 40C to 85C
Ambient,
T
A
, Range L................ 40C to 150C
Maximum
Junction,
T
J(max)
........................165C
Storage Temperature, T
S
.................. 65C to 170C
On-chip protection
Supply transient protection
Reverse-battery protection
On-board voltage regulator
3.5 V to 24 V operation
Sensitive Two-Wire Field-Programmable Chopper-Stabilized
Unipolar Hall-Effect Switches
Package LH, 3-pin SOT
Features and Benefi ts
1. VCC
2. No connection
3. GND
NC
1
2
3
1
2
3
1. VCC
2. GND
3. GND
Package UA, 3-pin SIP
Chopper stabilization
Low switchpoint drift over operating
temperature range
Low stress sensitivity
Field-programmable for optimized
switchpoints
The A1180, A1181, A1182, and A1183 devices are sensitive, two-wire, unipolar,
Hall effect switches. The operate point, B
OP
, can be fi eld-programmed, after fi nal
packaging of the sensor and placement into the application. This advanced feature
allows the optimization of the sensor switching performance, by effectively
accounting for variations caused by mounting tolerances for the device and the
target magnet.
This family of devices are produced on the Allegro MicroSystems advanced
BiCMOS wafer fabrication process, which implements a patented, high-frequency,
chopper-stabilization technique that achieves magnetic stability and eliminates
the offsets that are inherent in single-element devices exposed to harsh applica-
tion environments. Commonly found in a number of automotive applications,
the A1180-83 family of devices are utilized to sense: seat track position, seat belt
buckle presence, hood/trunk latching, and shift selector position.
Two-wire unipolar switches are particularly advantageous in price-sensitive appli-
cations, because they require one less wire than the more traditional open-collec-
tor output switches. Additionally, the system designer gains inherent diagnostics
because output current normally fl ows in either of two narrowly-specifi ed ranges.
Any output current level outside of these two ranges is a fault condition. The
A1180-83 family of devices also features on-chip transient protection, and a Zener
clamp to protect against overvoltage conditions on the supply line.
The output currents of the A1181 and A1183 switch
HIGH
in the presence of a south
polarity magnetic fi eld of suffi cient strength; and switch
LOW
otherwise, including
when there is no signifi cant magnetic fi eld present. The A1180 and A1182 have
inverted output current levels: switching
LOW
in the presence of a south polarity
magnetic fi eld of suffi cient strength, and
HIGH
otherwise. The devices also differ in
their specifi ed
LOW
current supply levels.
Both devices are offered in two package styles: LH, a SOT-23W miniature low-
profi le package for surface-mount applications, and UA, a three-lead ultramini
Single Inline Package (SIP) for through-hole mounting. Each package is available
in a lead (Pb) free version (suffi x, T) with 100% matte tin plated leadframe.
Factory-programmed versions are also available. Refer to: A1140, A1141, A1142,
A1143, A1145, and A1146.
2
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
Product Selection Guide
Part Number
Pb-
free
Packing
1
Mounting
Ambient, T
A
(C)
Output
South (+) Field
2
Supply Current at
Low Output, I
CC(L)
(mA)
A1180ELHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 85
Low
2 to 5
A1180ELHLT-T
Yes
A1180EUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1180EUA-T
Yes
A1180LLHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 150
A1180LLHLT-T
Yes
A1180LUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1180LUA-T
Yes
A1181ELHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 85
High
A1181ELHLT-T
Yes
A1181EUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1181EUA-T
Yes
A1181LLHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 150
A1181LLHLT-T
Yes
A1181LUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1181LUA-T
Yes
A1182ELHLT
3
7-in. reel, 3000 pieces/reel
Surface mount
40 to 85
Low
5 to 6.9
A1182ELHLT-T
Yes
A1182EUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1182EUA-T
Yes
A1182LLHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 150
A1182LLHLT-T
Yes
A1182LUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1182LUA-T
Yes
A1183ELHLT
3
7-in. reel, 3000 pieces/reel
Surface mount
40 to 85
High
A1183ELHLT-T
Yes
A1183EUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1183EUA-T
Yes
A1183LLHLT
7-in. reel, 3000 pieces/reel
Surface mount
40 to 150
A1183LLHLT-T
Yes
A1183LUA
Bulk, 500 pieces/bag
4-pin SIP through hole
A1183LUA-T
Yes
1
Contact Allegro for additional packing options.
2
South (+) magnetic fields must be of sufficient strength.
3
These variants are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is cur-
rently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near
future is probable. Samples are no longer available. Status date change May 2, 2005.
3
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
Functional Block Diagram
Amp
Regulator
Program/Lock
Low-Pass
Filter
GND
VCC
GND
Programming
Logic
Package UA Only
0.01 uF
V+
Offset
Clock/Logic
Dyna
mic
O
ffse
t
Ca
nce
ll
a
t
i
o
n
Sam
p
le
and
H
old
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 CHARACTERISTICS
1
over the operating voltage and temperature range, unless otherwise specifi ed
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Programmable Operate Point Range
B
OPrange
I
CC
= I
CC(H)
for A1180 and A1182
I
CC
= I
CC(L)
for A1181 and A1183
60
200
G
Initial Operate Point Range
B
OPinit
V
CC
= 12 V
33
60
G
Switchpoint Step Size
2
B
RES
V
CC
= 5 V, T
A
= 25C
4
8
12
G
Number of Programming Bits
Switchpoint setting
5
Bit
Programming locking
1
Bit
Temperature Drift of B
OP
B
OP
20
G
Hysteresis
B
HYS
B
HYS
= B
OP
B
RP
5
15
30
G
1
Relative 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 fi eld (or a weaker north polarity fi eld, if present).
2
The range of values specifi ed for B
RES
is a maximum, derived from the cumulative programming bit errors.
ELECTRICAL CHARACTERISTICS
over the operating voltage and temperature range, unless otherwise specifi ed
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage
1
V
CC
Device powered on
3.5
24
V
Supply Current
2
I
CC(L)
B >B
OP
for A1180; B <B
RP
for A1181
2
5
mA
B >B
OP
for A1182; B <B
RP
for A1183
5
6.9
mA
I
CC(H)
B >B
OP
for A1181, A1183
B <B
RP
for A1180, A1182
12
17
mA
Supply Zener Clamp Voltage
V
Z(supply)
I
CC
= I
CC(L)(max)
+ 3 mA; T
A
= 25C
28
40
V
Supply Zener Clamp Current
I
Z(supply)
V
Z(supply)
= 28 V
I
CC(L)(max)
+ 3 mA
mA
Reverse Supply Current
I
RCC

V
RCC
= 18 V
1.6
mA
Output Slew Rate
3
di/dt
No bypass capacitor; capacitance of the
oscilloscope performing the measurement
= 20 pF
36
mA/s
Chopping Frequency
f
C
200
kHz
Power-On Time
4
t
on
After factory trimming; with and without
bypass capacitor (C
BYP
= 0.01 F)
25
s
Power-On State
5,6
POS
t
on
t
on(max)
;
V
CC
slew rate 25 mV/s
HIGH
1
V
CC
represents the generated voltage between the VCC pin and the GND pin.
2
Relative 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 fi eld (or a weaker north polarity fi eld, if present).
3
Measured without bypass capacitor between VCC and GND. Use of a bypass capacitor results in slower current change.
4
Measured with and without bypass capacitor of 0.01 F. Adding a larger bypass capacitor causes longer Power-On Time.
5
POS is defi ned as true only with a V
CC
slew rate of 25 mV / s or greater. Operation with a V
CC
slew rate less than 25 mV / s can permanently harm
device performance.
6
POS is undefi ned for t > t
on
or B
RP
< B < B
OP
.
5
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
Characteristic Data
0
2
4
6
8
10
10
12
14
16
18
20
-50
0
50
100
150
200
0
2
4
6
8
10
-50
0
50
100
150
200
-50
0
50
100
150
200
-50
0
50
100
150
200
-50
0
50
100
150
200
5
10
15
20
25
30
I
CC(L)
versus Ambient Temperature
at Various Levels of V
CC
(A1180, A1181)
Hysteresis versus Ambient Temperature
at Various Levels of V
CC
(A1180, A1181, A1182, A1183)
I
CC(H)
versus Ambient Temperature
at Various Levels of V
CC
(A1180, A1181, A1182, A1183)
Ambient Temperature, T
A
(C)
Ambient Temperature, T
A
(C)
Ambient Temperature, T
A
(C)
Ambient Temperature, T
A
(C)
I
CC(H)
(mA)
I
CC(L)
(mA)
Average
B
OP
(G)
B
HYS
(G)
V
CC
(V)
3.5
12
24
V
CC
(V)
3.5
12
24
V
CC
(V)
3.5
12
24
I
CC(L)
versus Ambient Temperature
at Various Levels of V
CC
(A1182, A1183)
Ambient Temperature, T
A
(C)
I
CC(L)
(mA)
V
CC
(V)
3.5
12
24
0
25
50
75
100
125
150
175
200
Average B
OP
Bits versus Ambient Temperature
(A1180, A1181, A1182, A1183)
B
OPinit
B
it 1
B
it 2
B
it 3
B
it 4
B
it 5