a1321elh Allegro MicroSystems, Inc., a1321elh Datasheet

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a1321elh

Manufacturer Part Number
a1321elh
Description
Ratiometric Linear Hall Effect Sensor For High-temperature Operation
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
A1321-DS Rev. 3
Supply Voltage, V
Reverse-Battery Voltage, V
Reverse-Output Voltage, V
Output Sink Current, I
Operating Temperature
Storage Temperature, T
*
above the minimum supply Zener clamp voltage, V
due to the Zener diode turning on.
Ratiometric Linear Hall Effect Sensor for High-Temperature Operation
Additional current draw may be observed at voltages
Ambient, T
Ambient, T
Maximum Junction, T
AB SO LUTE MAX I MUM RAT INGS
1. VCC
2. GND
3. VOUT
1. VCC
2. VOUT
3. GND
Package LH, 3-pin Surface Mount
Package UA, 3-pin SIP
A
A
, Range E.................. –40ºC to 85ºC
, Range L................ –40ºC to 150ºC
CC
.......................................... 8 V
1
OUT
S
2
1
.................. –65ºC to 170ºC
J(max)
............................. 10 mA
ROUT
RCC
3
2
....................... –0.1 V
........................165ºC
..................... –0.1 V
3
A1321/A1322/A1323
Z(min)
,
*
 Temperature-stable quiescent output
Precise recoverability after temperature cycling
Output voltage proportional to magnetic fl ux
Ratiometric rail-to-rail output
Features and Benefi ts
Use the following complete part numbers when ordering:
The A132X family of linear Hall-effect sensors are optimized, sensitive, and tem-
perature-stable. These ratiometric Hall-effect sensors provide a voltage output that
is proportional to the applied magnetic fi eld. The A132X family has a quiescent
output voltage that is 50% of the supply voltage and output sensitivity options
of 2.5mV/G, 3.125mV/G, and 5mV/G. The features of this family of devices are
ideal for use in the harsh environments found in automotive and industrial linear
and rotary position sensing systems.
Each device has a BiCMOS monolithic circuit which integrates a Hall element,
improved temperature-compensating circuitry to reduce the intrinsic sensitivity
drift of the Hall element, a small-signal high-gain amplifi er, and a rail-to-rail low-
impedance output stage.
A proprietary dynamic offset cancellation technique, with an internal high-fre-
quency clock, reduces the residual offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress. The high frequency
clock allows for a greater sampling rate, which results in higher accuracy and
faster signal processing capability. This technique produces devices that have an
extremely stable quiescent output voltage, are immune to mechanical stress, and
have precise recoverability after temperature cycling. Having the Hall element
and an amplifi er on a single chip minimizes many problems normally associated
with low-level analog signals.
Output precision is obtained by internal gain and offset trim adjustments made at
end-of-line during the manufacturing process.
The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin
surface mount package (LH).
voltage
density
Part Number
A1321EUA
A1321ELH
A1322EUA
A1322ELH
A1323EUA
A1323ELH
A1321LUA
A1321LLH
A1322LUA
A1322LLH
A1323LUA
A1323LLH
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Package
SIP
SIP
SIP
SIP
SIP
SIP
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
–40ºC to 150ºC
–40ºC to 150ºC
–40ºC to 150ºC
–40ºC to 85ºC
–40ºC to 85ºC
–40ºC to 85ºC
Ambient
Improved sensitivity
4.5 to 5.5 V operation
Immunity to mechanical stress
Solid-state reliability
Robust EMC protection
Sensitivity, Typ.
2.500 mV/G
5.000 mV/G
3.125 mV/G

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a1321elh Summary of contents

Page 1

... Features and Benefi Temperature-stable quiescent output voltage Precise recoverability after temperature cycling Output voltage proportional to magnetic fl density Ratiometric rail-to-rail output Use the following complete part numbers when ordering: Part Number A1321EUA A1321ELH A1321LUA A1321LLH A1322EUA , A1322ELH Z(min) A1322LUA A1322LLH A1323EUA A1323ELH ...

Page 2

... VOUT Output from circuit GND Ground A1321-DS Rev. 3 A1321/A1322/A1323 Functional Block Diagram Amp Gain GND Description VOUT Out Offset Trim Control Number Package LH Package Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 ...

Page 3

... Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ...

Page 4

... Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 4 Max Units 5.250 mV/G 3.281 mV/G 2.625 mV/G ±10 G ±1.5 % ±1.5 % ±1.5 % ± ...

Page 5

... Lin– = 2(∆V – out(– out(q) – ∆V ∆V out(+B) out(q) Sym = ∆V – V out(q) out(–B) Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com (4) × 100% (5) (6) × 100% (7) × 100% (8) × 100% 5 ...

Page 6

... Temperature 101 100.8 4.5 to 5.0 V 100.6 5.5 to 5.0 V 100.4 100.2 100 99.8 99.6 99.4 99.2 99 Average Negative Linearity (Lin–) vs Temperature (°C) A Average Ratiometry, ∆Sens vs Temperature (∆V), 4.5 to 5.0V 5.5 to 5.0V T (°C) A Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 6 ...

Page 7

... Average Sensitivity, Sens 25° (V) Average Delta Sensitivity, ∆Sens, vs Temperature ∆ in readings at each temperature are relative to 25° (°C) A Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 1321 1322 1323 5.5 1321 1322 1323 5.5 7 ...

Page 8

... U.S. Customary dimensions (in.) in brackets, for reference only A Hall element B Active Area Depth 0.28 [.011] C Fits SC–59A Solder Pad Layout .0195 0.50 NOM x 1.57 1.47 45° BSC 0.79 0.44 0.35 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2.40 .094 BSC 0.95 .037 BSC 8 ...

Page 9

... The in for ma tion in clud ed herein is believed rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon - si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. ...

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