A1381, A1383, and A1384
Programmable Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
Discontinued Product
Not for Time Design
Last New Buy
no longer in production The device should not
These parts are in production but have been determined to be be
purchased for new This classification Samples are the product is
NOT FOR NEW DESIGN. This classification indicates that sale of
LAST TIME BUY.design applications.indicates that no longer available.
this device is currently been given. Sale of customer is currently
obsolete and notice hasrestricted to existingthis deviceapplications.
The device existing customer applications. design applications
restricted toshould not be purchased for newThe device should not be
because obsolescence in the near future is probable. Samples are no
purchased for new design applications because of obsolescence in the
longer available.
near future. Samples are no longer available.
December
February 1, 2006
Date of status change: April 2003 1, 2015
Deadline for receipt of LAST TIME BUY orders: April 28, 2006
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, refer to the
A1389.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
Preliminary Data Sheet
Subject to Change Without Notice
September 14, 2004
Programmable Linear
A1381, A1383, and A1384
Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
New applications for linear output Hall effect sensing, such
as displacement, angular position, and current measurement,
require high accuracy in conjunction with small package size.
The Allegro
™
A138x family of programmable linear Hall effect
sensor ICs was designed specifically to achieve both goals.
These temperature-stable devices are available in a miniature
surface mount package (SOT23-W) and an ultramini through-
hole single-in-line package. The accuracy of these devices is
enhanced via programmability on the output pin for end-of-line
optimization without the added complexity and cost of a fully
programmable device.
These ratiometric Hall effect devices provide a voltage output
that is proportional to the applied magnetic field. Both the
quiescent voltage output and magnetic sensitivity are user-
adjustable. The quiescent voltage output can be set around
50% of the supply voltage, and the sensitivity adjusted between
2 mV/G and 9 mV/G over the device family. Programming
selections also exist for output polarity and temperature
compensation. The features of this linear family make it ideal
for high accuracy requirements of automotive and industrial
applications, and operate across an extended temperature range,
–40°C to 150°C.
Continued on the next page…
Features and Benefits
▪ Customer programmable offset, sensitivity, sensitivity
temperature coefficient, and polarity
▪ Programmability at end-of-line
▪ Ratiometric sensitivity, quiescent voltage output, and
clamps for interfacing with application DAC
▪ Temperature-stable quiescent voltage output
and sensitivity
▪ Precise recoverability after temperature cycling
▪ Output voltage clamps provide short circuit
diagnostic capabilities
▪ Wide ambient temperature range: –40°C to 150°C
▪ Immune to mechanical stress
▪ Miniature package options
Description
Packages: 3-pin SOT23W (suffix LH), and
3-pin SIP (suffix UA)
Not to scale
Functional Block Diagram
V+
VCC
To all subcircuits
Dynamic Offset
Cancellation
Amp
Filter
Out
VOUT
(Programming)
C
BYPASS
Hall Drive Circuit
Gain
Gain Temperature
Coefficient
Trim Control
Offset
GND
Engineering samples available on a limited basis. Contact your local
sales or applications support office for additional information.
A1381-DS, Rev. 13
Preliminary - Subject to Change
Without Notice September 14, 2004
A1381, A1383,
Programmable
and A1384
Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
Description (continued)
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic sensitivity
drift of the Hall element, a small-signal high-gain amplifier, a clamped
low-impedance output stage, and a proprietary dynamic
Selection Guide
Part Number
Packing
1
Package
Surface mount
Surface mount
Through hole
Surface mount
Surface mount
Through hole
Surface mount
Through hole
Surface mount
Through hole
Surface mount
Surface mount
Through hole
Surface mount
Surface mount
Through hole
A1381ELHLT-T Tape and reel, 3000 pieces/reel
A1381ELHLX-T Tape and reel, 10,000 pieces/reel
A1381EUA-T
Bulk bag, 500 pieces/bag
A1381LLHLT-T Tape and reel, 3000 pieces/reel
A1381ELHLX-T Tape and reel, 10,000 pieces/reel
A1381LUA-T
Bulk bag, 500 pieces/bag
A1383ELHLT-T Tape and reel, 3000 pieces/reel
A1383EUA-T
Bulk bag, 500 pieces/bag
A1383LLHLT-T Tape and reel, 3000 pieces/reel
A1383LUA-T
Bulk bag, 500 pieces/bag
A1384ELHLT-T Tape and reel, 3000 pieces/reel
A1384ELHLX-T Tape and reel, 10,000 pieces/reel
A1384EUA-T
Bulk bag, 500 pieces/bag
A1384LLHLT-T Tape and reel, 3000 pieces/reel
A1384ELHLX-T Tape and reel, 10,000 pieces/reel
A1384LUA-T
Bulk bag, 500 pieces/bag
1
Contact Allegro for additional packing options.
offset cancellation technique.
The A138x devices are provided in a 3-pin ultramini single-in-line
package (UA suffix), and a 3-pin surface mount SOT-23W package
(LH suffix).
T
A
(°C)
–40 to 85
Internal Bandwidth
(kHz)
Sensitivity Range
(mV/G)
12
–40 to 150
–40 to 85
–40 to 150
–40 to 85
27
–40 to 150
6.00 to 9.00
21
2.75 to 4.25
2.00 to 3.00
Absolute Maximum Ratings
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Forward Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
I
OUT(SOURCE)
I
OUT(SINK)
T
A
T
stg
T
J
(max)
Symbol
V
CC
V
RCC
V
OUT
V
ROUT
Notes
Operating Ambient Temperature
Storage Temperature
Maximum Junction Temperature
VOUT to GND
VCC to VOUT
Range E
Range L
Rating
8
–0.1
28
–0.1
2
10
–40 to 85
–40 to 150
–65 to 165
165
Units
V
V
V
V
mA
mA
ºC
ºC
ºC
ºC
Pin-out Diagrams
LH Package
3
UA Package
Number
LH
1
3
2
UA
1
2
3
Name
VCC
GND
VOUT
Description
Input power supply; use bypass capacitor to connect to ground
Ground
Output signal; also used for programming
1
2
1
2
3
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
2
Preliminary - Subject to Change
Without Notice September 14, 2004
A1381, A1383,
Programmable
and A1384
Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
OPERATING CHARACTERISTICS
, valid over full operating temperature range, T
A
; C
BYPASS
= 0.1 µF, V
CC
= 5 V, unless otherwise specified
Characteristic
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current
V
CC
I
CC
No load on VOUT
A1381
A1382
Power-On
Time
1
t
PO
A1383
A1384
Delay to Clamp
1
Supply Zener Clamp Voltage
t
CLP
V
Z
T
A
= 25 °C, C
BYPASS
= open,
C
L
(of test probe) = 10 pF, Sens = 7.5 mV/G
T
A
= 25 °C, C
BYPASS
= open,
C
L
(of test probe) = 10 pF, Sens = 5.0 mV/G
T
A
= 25 °C, C
BYPASS
= open,
C
L
(of test probe) = 10 pF, Sens = 3.125 mV/G
T
A
= 25 °C, C
BYPASS
= open,
C
L
(of test probe) = 10 pF, Sens = 2.5 mV/G
4.5
–
–
–
–
–
–
6
–
Small signal –3 dB
–
–
–
–
T
A
=25°C; C
L
= 10 nF,
Sens = 7.5 mV/G; no external filter
T
A
=25°C; C
L
= 10 nF,
Sens = 5.0 mV/G; no external filter
T
A
=25°C; C
L
= 10 nF,
Sens = 3.125 mV/G; no external filter
T
A
=25°C; C
L
= 10 nF,
Sens = 2.5 mV/G; no external filter
T
A
=25°C; Sens = 2.5 mV/G; external 2 kHz low
pass filter with R = 1.69 kΩ, C = 47 nF
5.0
6.9
32
27
23
19
30
8.3
12
17
21
27
170
5.5
8
–
–
–
–
–
–
–
–
–
–
–
V
mA
µs
µs
µs
µs
µs
V
kHz
kHz
kHz
kHz
kHz
Symbol
Test Conditions
Min.
Typ.
Max.
Units
T
A
= 25°C, C
L
= 10 nF
T
A
= 25°C, I
CC
= 11 mA
A1381
A1382
A1383
A1384
T
A
= 25°C
Internal Bandwidth
BW
i
Chopping Frequency
2
OUTPUT CHARACTERISTICS
f
C
A1381
A1382
Noise (peak to peak)
V
N(p-p)
A1383
A1384
A138x
DC Output Resistance
Output Load Resistance
Output Load Capacitance
Phase Shift
3
R
OUT
R
L
C
L
∆Φ
V
CLP(HIGH)
V
CLP(LOW)
Output Slew Rate
SR
–
–
–
–
–
–
34
27
20
18
4.7
<1
–
–
–
3
4.5
0.55
175
–
–
–
–
–
–
–
–
10
–
4.65
0.70
–
mV
mV
mV
mV
mV
Ω
kΩ
kΩ
nF
deg.
V
V
V/ms
VOUT to VCC
VOUT to GND
VOUT to GND
No load on VOUT, magnetic input signal frequency =
1 kHz, with 1 V
(p-p)
output signal
T
A
= 25°C, B = 600 G, Sens = 5.0 mV/G,
R
L
= 10 kΩ (VOUT to GND)
T
A
= 25°C, B = –600 G, Sens = 5.0 mV/G,
R
L
= 10 kΩ (VCC to VOUT)
C
L
= 10 nF
4.7
4.7
–
–
4.35
0.40
–
Output Voltage
Clamp
4
Continued on the next page...
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
3
Preliminary - Subject to Change
Without Notice September 14, 2004
A1381, A1383,
Programmable
and A1384
Linear Hall Effect Sensor ICs with Analog Output
Available in a Miniature Thin Profile Surface Mount Package
OPERATING CHARACTERISTICS (continued),
valid over full operating temperature range, T
A
; C
BYPASS
= 0.1 µF, V
CC
= 5 V, unless otherwise specified
Characteristic
PRE-PROGRAMMING TARGET
5
Pre-Programming Quiescent
Voltage Output
Symbol
V
OUT(Q)init
B = 0 G, T
A
= 25°C
A1381
Test Conditions
Min.
–
–
Typ.
2.1
4.2
2.9
2.1
1.4
–0.05
Max.
–
–
–
–
–
–
Units
V
mV/G
mV/G
mV/G
mV/G
%/°C
Pre-Programming Sensitivity
Sens
init
A1382
A1383
A1384
T
A
= 25°C
–
–
–
–
Pre-Programming Sensitivity
Temperature Coefficient
6
Quiescent Voltage Output
Range
4,7
Quiescent Voltage Output
Programming Bits
Average Quiescent Voltage
Output Step Size
8,9
Quiescent Voltage Output
Programming Resolution
10
SENSITIVITY PROGRAMMING
TC
Sensinit
T
A
= 150°C
QUIESCENT VOLTAGE OUTPUT PROGRAMMING
V
OUT(Q)
B = 0 G, T
A
= 25°C
2.3
–
Step
VOUT(Q)
Err
PGVOUT(Q)
T
A
= 25°C
T
A
= 25°C
8
–
–
6
11.5
Step
VOUT(Q)
×
±0.5
–
–
–
–
6
110
75
55
35
Step
SENS
×
±0.5
2.6
–
15
–
V
bit
mV
mV
A1381
Sensitivity Range
4,11
Sens
A1382
A1383
A1384
Sensitivity Programming Bits
A1381
Average Sensitivity Step Size
8,9
Step
SENS
A1382
A1383
A1384
Sensitivity Programming
Resolution
10
SENSITIVITY TC PROGRAMMING
Sensitivity Temperature Coef-
ficient Range
6
Sensitivity Temperature Coef-
ficient Programming Bits
Average Sensitivity Tempera-
ture Coefficient Step Size
6
Sensitivity Temperature Coeffi-
cient Programming Resolution
6
Step
TCSENS
Err
PGTCSENS
T
A
= 150°C
T
A
= 150°C
TC
Sens
T
A
= 150°C
Err
PGSENS
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
6.00
4.00
2.75
2.00
–
90
55
35
28
–
9.00
6.25
4.25
3.00
–
130
95
75
42
–
mV/G
mV/G
mV/G
mV/G
bit
µV/G
µV/G
µV/G
µV/G
mV/G
0.00
–
–
–
–
3
0.03
Step
TCSENS
x
±0.5
0.095
–
–
–
%/°C
bit
%/°C
%/°C
Continued on the next page...
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
