A3213EUA-T [ALLEGRO]
MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCHES; 微功耗，超灵敏霍尔EF FECT SWITCHES
| 型号： | A3213EUA-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCHES |
| 文件： | 总11页 (文件大小：570K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3213 AND
3214
MICROPOWER, ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
The A3213xx and A3214xx integrated circuits are ultra-sensitive, pole
independent Hall-effect switches with a latched digital output. They are
especially suited for operation in battery-operated, hand-held equipment such
as cellular and cordless telephones, pagers, and palmtop computers. A 2.4 volt
to 5.5 volt operation and a unique clocking scheme reduce the average oper-
ating power requirements – the A3213xx to 825 µW, the A3214xx to 14 µW
(typical at 2.75 V)! Except for operating duty cycle and average operating
current, the A3213xx and A3214xx are identical.
Package Designator ‘LH’ Pinning
(SOT23W)
3
Unlike other Hall-effect switches, either a north or south pole of sufficient
strength will turn the output on; in the absence of a magnetic field, the output
is off. The polarity independence and minimal power requirement allows
these devices to easily replace reed switches for superior reliability and ease of
manufacturing, while eliminating the requirement for signal conditioning.
V
DD
Improved stability is made possible through chopper stabilization (dy-
namic offset cancellation), which reduces the residual offset voltage normally
caused by device overmolding, temperature dependencies, and thermal stress.
1
2
These devices include on a single silicon chip a Hall-voltage generator,
small-signal amplifier, chopper stabilization, a latch, and a MOSFET output.
Advanced BiCMOS processing is used to take advantage of low-voltage and
low-power requirements, component matching, very low input-offset errors,
and small component geometries.
Dwg. PH-016-1
Range 'E' devices are rated for operation over a temperature range of
-40°C to +85°C; range 'L' devices are rated for operation over a temperature
range of -40°C to +150°C. Two package styles provide a magnetically opti-
mized package for most applications. ‘LH’ is a miniature low-profile surface-
mount package, ‘UA’ is a three-lead SIP for through-hole mounting. Each
package is available in a lead (Pb) free version (suffix, –T) , with a 100% matte
tin plated leadframe.
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at T = +25°C
A
Supply Voltage, VDD .............................. 6 V
Magnetic Flux Density, B .......... Unlimited
Output Off Voltage, VOUT ...................... 6 V
Output Current, IOUT ........................... 1 mA
Junction Temperature, TJ ................ +170°C
FEATURES
■ Micropower Operation
■ Operate With North or South Pole
■ 2.4 V to 5.5 V Battery Operation
■ Chopper Stabilized
Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress
Operating Temperature Range, TA
Suffix 'E' ...................... -40°C to +85°C
Suffix 'L' ................... -40°C to +150°C
■ ESD Protected to 5 kV
■ Solid-State Reliability
Storage Temperature Range,
TS .............................. -65°C to +170°C
■ Small Size
Caution: These CMOS devices have input
static protection (Class 3) but are still sus-
ceptible to damage if exposed to extremely
high static electrical charges.
■ Easily Manufacturable With Magnet Pole Independence
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
Product Selection Guide
Ambient, TA
DC
(%)
IDDAVG(TYP)
(µA)
Part Number
Pb-free
Packing*
Mounting
(ºC)
A3213ELHLT
A3213ELHLT-T
A3213EUA
–
Yes
–
7-in. reel
3000 pieces/reel
Surface Mount
–40 to 85
Bulk
500 pieces/bag
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
Surface Mount
SIP through hole
A3213EUA-T
A3213LLHLT
A3213LLHLT-T
A3213LUA
Yes
–
25
460
7-in. reel
3000 pieces/reel
Yes
–
–40 to 150
–40 to 85
–40 to 150
Bulk
500 pieces/bag
A3213LUA-T
A3214ELHLT
A3214ELHLT-T
A3214EUA
Yes
–
7-in. reel
3000 pieces/reel
Yes
–
Bulk
500 pieces/bag
A3214EUA-T
A3214LLHLT
A3214LLHLT-T
A3214LUA
Yes
–
0.10
11
7-in. reel
3000 pieces/reel
Yes
–
Bulk
500 pieces/bag
A3214LUA-T
Yes
*Contact Allegro for additional packing options.
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 (508) 853-5000
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
SWITCH
TIMING
LOGIC
OUTPUT
GROUND
X
Dwg. FH-020-5
800
700
Package Designator ‘UA’ Pinning
(SIP)
PACKAGE
SUFFIX "UA"
RθJA = 165°C/W
600
500
400
300
200
100
0
PACKAGE
SUFFIX "LH"
θJA = 228°C/W
R
V
DD
1
2
3
TEMP.
CODE "E"
TEMP.
CODE "L"
20
40
60
80
100
120
140
160
180
°
AMBIENT TEMPERATURE in
C
Dwg. GH-046-9
Dwg. PH-016
NOTE – Allowable package power dissipation will not be exceeded
unless Absolute Maximum Ratings (page 1) are exceeded.
Pinning is shown viewed from branded side.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2003 Allegro MicroSystems, Inc.
3
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS: unless otherwise noted
over operating voltage and temperature range.
Limits
Characteristic
Supply Voltage Range
Output Leakage Current
Output On Voltage
Awake Time
Symbol
VDD
Test Conditions
Min.
2.4
–
Typ.
3.0
<1.0
100
60
Max.
5.5
1.0
300
90
Units
V
1)
Operating
IOFF
VOUT = 5.5 V, BRPN < B < BRPS
IOUT = 1 mA, VDD = 3.0 V
µA
mV
µs
VOUT
tawake
tperiod
–
–
Period
A3213xx
A3214xx
A3213xx
A3214xx
–
240
60
360
90
µs
–
ms
%
DutyCycle
d.c.
–
25
–
–
0.10
340
–
–
%
Chopping Frequency
Supply Current
fC
–
–
kHz
mA
µA
µA
IDD(EN)
IDD(DIS)
IDD(AVG)
Chip awake (enabled)
Chipasleep(disabled)
A3213xx
–
2.0
8.0
850
–
–
–
460
A3214xx
–
11
–
22
–
µA
kV
V
ESD, Human Body Model
ESD, Machine Model
–
–
Per CDF-AEC-Q100-002
Per JESD22-A115
5.0
350
–
–
NOTES: 1. Operateandreleasepointswillvarywithsupplyvoltage.
2. BOPx = operate point (output turns ON); BRPx = release point (output turns OFF).
3. Typical Data is at TA = +25°C and VDD = 3.0 V and is for design information only.
MAGNETIC CHARACTERISTICS: over operating voltage and temperature range.
Limits
Characteristic
Symbol
BOPS
BOPN
BRPS
Test Conditions
Min.
–
Typ.
42
Max.
70
–
Units
G
OperatePoints
South pole to branded side
North pole to branded side
South pole to branded side
North pole to branded side
-70
10
–
-48
32
G
ReleasePoints
–
G
BRPN
Bhys
-38
10
-10
–
G
Hysteresis
|BOPx - BRPx
|
–
G
NOTES: 1. As used here, negative flux densities are defined as less than zero (algebraic convention) and -50 G is less than +10 G.
2. BOPx = operate point (output turns ON); BRPx = release point (output turns OFF).
3. Typical Data is at TA = +25°C and VDD = 3.0 V and is for design information only.
4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
www.allegromicro.com
4
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature (VDD = 3 V)
TEMPERATURE, TA (°C)
A3213xx
A3214xx
TEMPERATURE, TA (°C)
TEMPERATURE, TA (°C)
TEMPERATURE, TA (°C)
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
5
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of supply voltage (TA = 25°C)
SUPPLY VOLTAGE, VDD (V)
A3213xx
A3214xx
SUPPLY VOLTAGE, VDD (V)
SUPPLY VOLTAGE, VDD (V)
www.allegromicro.com
6
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
FUNCTIONAL DESCRIPTION
Low Average Power. Internal timing circuitry activates the
sensor for 60 µs and deactivates it for the remainder of the
period (240 µs for the A3213xx and 60 ms for the A3214xx).
A short "awake" time allows for stabilization prior to the
sensor sampling and data latching on the falling edge of the
timing pulse. The output during the "sleep" time is latched in
the last sampled state. The supply current is not affected by
the output state.
+V
X
PERIOD
60 µs - "AWAKE"
IDD(EN)
"SLEEP"
SAMPLE &
OUTPUT LATCHED
Dwg. EH-012-1
IDD(DIS)
0
Dwg. WH-017-1
B
+V
Chopper-Stabilized Technique. The Hall element can be
considered as a resistor array similar to a Wheatstone bridge.
A large portion of the offset is a result of the mismatching of
these resistors. These devices use a proprietary dynamic offset
cancellation technique, with an internal high-frequency clock
to reduce the residual offset voltage of the Hall element that is
normally caused by device overmolding, temperature depen-
dencies, and thermal stress. The chopper-stabilizing technique
cancels the mismatching of the resistor circuit by changing the
direction of the current flowing through the Hall plate using
CMOS switches and Hall voltage measurement taps, while
maintaing the Hall-voltage signal that is induced by the
external magnetic flux. The signal is then captured by a
sample-and-hold circuit and further processed using low-offset
bipolar circuitry. This technique produces devices that have an
extremely stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability after tempera-
ture cycling. This technique will also slightly degrade the
device output repeatability. A relatively high sampling
frequency is used in order that faster signals can be processed.
—
HALL
VOLTAGE
+
Dwg. AH-011-2
Operation. The output of this device switches low (turns on)
when a magnetic field perpendicular to the Hall sensor exceeds
the operate point BOPS (or is less than BOPN). After turn-on,
the output is capable of sinking up to 1 mA and the output
voltage is VOUT(ON). When the magnetic field is reduced below
the release point BRPS (or increased above BRPN), the device
output switches high (turns off). The difference in the mag-
netic operate and release points is the hysteresis (Bhys) of the
device. This built-in hysteresis allows clean switching of the
output even in the presence of external mechanical vibration
and electrical noise.
More detailed descriptions of the circuit operation can be
found in Technical Paper STP 97-10, Monolithic Magnetic
Hall Sensor Using Dynamic Quadrature Offset Cancellation
and Technical Paper STP 99-1, Chopper-Stabilized Amplifiers
With A Track-and-Hold Signal Demodulator.
As used here, negative flux densities are defined as less
than zero (algebraic convention) and -50 G is less than +10 G.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
7
3213 AND 3214
MICROPOWER,
Allegro
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
OUTPUT OFF
5 V
MAX
B
B
OPN
OPS
Package Designator ‘LH’
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
0.059"
1.51 mm
3
0.046"
B
0.85 mm
B
RPS
RPN
OUTPUT ON
0
0
-B
+B
A
MAGNETIC FLUX
Dwg. GH-043-1
1
2
Dwg. MH-025-1
Applications. Allegro's pole-independent sensing technique
allows for operation with either a north pole or south pole
magnet orientation, enhancing the manufacturability of the
device. The state-of-the-art technology provides the same
output polarity for either pole face.
Package Designator ‘UA’
It is strongly recommended that an external bypass
capacitor be connected (in close proximity to the Hall sensor)
between the supply and ground of the device to reduce both
external noise and noise generated by the chopper-stabilization
technique. This is especially true due to the relatively high
impedance of battery supplies.
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.081"
2.07 mm
The simplest form of magnet that will operate these
devices is a bar magnet with either pole near the branded
surface of the device. Many other methods of operation are
possible. Extensive applications information on magnets and
Hall-effect sensors is also available in the Allegro Electronic
Data Book AMS-702 or Application Note 27701, or at
0.053"
1.33 mm
A
BRANDED
SURFACE
1
2
3
www.allegromicro.com
Dwg. MH-011-12
OUTPUT
10 pF
X
SUPPLY
(3 V BATTERY)
0.1 µF
Dwg. EH-013-2
www.allegromicro.com
8
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘LH’
(SOT23W, fits SC-59A solder-pad layout)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
3.10
2.90
0.122
0.114
0.50
0.30
0.020
0.012
3
3
2.10
1.85
3.00
2.70
0.083
0.073
0.118
0.106
0.25
0.010
1
2
1
2
BSC
BSC
GAUGE PLANE
SEATING PLANE
GAUGE PLANE
SEATING PLANE
0.022
0.55
REF
REF
0.010
MIN
0.25
MIN
0° TO 8°
0° TO 8°
0.037
BSC
0.95
BSC
0.0079
0.0050
0.20
0.006
0.000
0.15
0.00
0.127
0.045
1.13
0.87
0.032
Dwg. MA-010-3D in
Dwg. MA-010-3D mm
0.028
0.70
3
3
1.00
0.039
2.40
0.094
1
2
1
2
0.95
0.037
Dwg. MA-011-3 mm
Dwg. MA-011-3 in
NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are
measured at the widest point (parting line).
2.Exact body and lead configuration at vendor’s option within limits shown.
3.Height does not include mold gate flash.
4.Where no tolerance is specified, dimension is nominal.
5.Add "LT" to part number for tape and reel.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
9
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘UA’
Dimensions in Millimeters
Dimensions in Inches
(controlling dimensions)
(for reference only)
0.164
0.159
4.17
4.04
1.57
1.47
0.062
0.058
45°
45°
3.10
2.97
0.122
0.117
45°
45°
0.79
0.031
2.16
MAX
0.085
MAX
1
2
3
1
2
3
16.26
15.24
0.44
0.35
0.640
0.600
0.0173
0.0138
0.48
0.36
0.0189
0.0142
SEE NOTE
SEE NOTE
1.27
BSC
0.050
BSC
Dwg. MH-014E mm
Dwg. MH-014E in
NOTES: 1. Tolerances on package height and width represent
allowable mold offsets. Dimensions given are
measured at the widest point (parting line).
2.Exact body and lead configuration at vendor’s
within limits shown.
3.Height does not include mold gate flash.
4.Recommended minimum PWB hole diameter to
transition area is 0.035" (0.89 mm).
5.Where no tolerance is specified, dimension is
6.Supplied in bulk pack (500 pieces per bag).
www.allegromicro.com
10
3213 AND 3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
The products described herein are manufactured under one or more
of the following U.S. patents: 4,761,569; 5,619,137; 5,621,319. In
addition, a patent is pending for Allegro's magnetic pole-independent
feature. Allegro has several foreign counterpart patents as well.
Allegro has not licensed any of these patents to any third party.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibil-
ity for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
11
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