Allegro A3210-UA Micropower, ultra-sensitive hall-effect switch Datasheet

Data Sheet
27622.60A
3209 AND
3210
MICROPOWER, ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
Package Suffix ‘LH’ Pinning
X
3
V
DD
OUTPUT
2
GROUND
SUPPLY
1
Dwg. PH-016-1
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VDD ............................. 5 V
Magnetic Flux Density, B .......... Unlimited
Output Off Voltage, VOUT ..................... 5 V
Output Current, IOUT .......................... 1 mA
The A3209Ex and A3210Ex 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. 2.5 volt to
3.5 volt operation and a unique clocking scheme to reduce the average operating power requirements – the A3209Ex to 400 µW, the A3210Ex to 25 µW!
Except for operating duty cycle and average operating current, the A3209Ex
and A3210Ex are identical.
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.
Improved stability is made possible through chopper stabilization (dynamic
offset cancellation), which reduces the residual offset voltage normally caused
by device overmolding, temperature dependencies, and thermal stress.
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.
The A3209Ex and A3210Ex are rated for operation over a temperature
range of -40°C to +85°C. Two package styles provide a magnetically optimized package for most applications. Suffix ‘LH’ is a miniature low-profile
surface-mount package while suffix ‘UA’ is a three-lead ultra-mini-SIP for
through-hole or surface mounting.
FEATURES
■
■
■
■
Junction Temperature, TJ ............... +170°C
Operating Temperature Range,
TA ............................... -40°C to +85°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
Caution: These CMOS devices have input
static protection (Class 3) but are still
susceptible to damage if exposed to
extremely high static electrical charges.
■
■
■
■
Micropower Operation
Operate With North or South Pole
2.5 V to 3.5 V Battery Operation
Chopper Stabilized
Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress
ESD Protected to 5 kV
Solid-State Reliability
Small Size
Easily Manufacturable With Magnet Pole Independence
Always order by complete part number: the prefix ‘A’ + the basic four-digit
part number + the suffix ‘E’ to indicate operating temperature range + a
suffix to indicate package style, e.g., A3210ELH .
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
SWITCH
LATCH
X
OUTPUT
SAMPLE
& HOLD
DYNAMIC
OFFSET CANCELLATION
TIMING
LOGIC
GROUND
Dwg. FH-020-5
Package Suffix ‘UA’ Pinning
X
600
Suffix "UA"
RθJA = 206°C/W
500
V
DD
Suffix "LH"
RθJA = 248°C/W
300
1
2
GROUND
400
SUPPLY
200
100
0
20
40
60
100
80
120
AMBIENT TEMPERATURE in °C
140
160
Dwg. PH-016
180
Dwg. GH-046-3A
2
3
OUTPUT
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
700
Pinning is shown viewed from branded side.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, Allegro MicroSystems, Inc.
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS with CBYPASS = 0.1 µF,
over operating voltage and temperature range (unless otherwise specified).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
2.5
2.75
3.5
V
Supply Voltage Range
VDD
Operating1)
Output Leakage Current
IOFF
VOUT = 3.5 V, BRPN < B < BRPS
–
«1.0
1.0
µA
Output On Voltage
VOUT
IOUT = 1 mA, VDD = 2.5 V
–
105
300
mV
Awake Time
tawake
30
60
90
µs
Period
tperiod
A3209Ex
240
480
720
µs
A3210Ex
30
60
90
ms
A3209Ex
–
12.5
–
%
A3210Ex
–
0.10
–
%
–
340
–
kHz
Duty Cycle
Chopping Frequency
Supply Current
(2.5 ≤ VDD ≤3.5 V)
d.c.
fC
IDD(EN)
Chip awake (enabled)
0.1
–
3.0
mA
IDD(DIS)
Chip asleep (disabled)
1.0
10
50
µA
IDD(AVG)
A3209Ex, VDD = 2.75 V
–
145
425
µA
A3209Ex, VDD = 3.5 V
–
195
425
µA
A3210Ex, VDD = 2.75 V
–
8.8
25
µA
A3210Ex, VDD = 3.5 V
–
13
60
µA
NOTES: 1. Operate and release points will vary with supply voltage.
2. BOPx = operate point (output turns ON); BRPx = release point (output turns OFF).
3. Typical Data is at TA = +25°C and VDD = 2.75 V and is for design information only.
MAGNETIC CHARACTERISTICS with CBYPASS = 0.1 µF,
over operating voltage and temperature range (unless otherwise specified).
Limits
Characteristic
Symbol
Operate Points
BOPS
Release Points
Hysteresis
Test Conditions
Min.
Typ.
Max.
Units
South pole to branded side
–
30
60
G
BOPN
North pole to branded side
-60
-35
–
G
BRPS
South pole to branded side
5.0
22
–
G
BRPN
North pole to branded side
–
-27
-5.0
G
Bhys
|BOPx - BRPx|
–
7.7
–
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. Typical Data is at TA = +25°C and VDD = 2.75 V and is for design information only.
www.allegromicro.com
3
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature
SWITCH POINTS
60
SWITCH POINTS IN GAUSS
40
BOPS
BRPS
20
VDD = 2.75 V
0
-20
BRPN
BOPN
-40
-60
-50
-25
0
25
50
75
AMBIENT TEMPERATURE IN °C
100
Dwg. GH-027-2
A3209-- SUPPLY CURRENT
A3210-- SUPPLY CURRENT
16
200
VDD = 3.5 V
180
VDD = 3 V
160
VDD = 2.5 V
140
120
-50
-25
0
25
50
AMBIENT TEMPERATURE IN °C
4
AVERAGE SUPPLY CURRENT IN µA
AVERAGE SUPPLY CURRENT IN µA
220
75
100
Dwg. GH-028-7
14
VDD = 3.5 V
12
VDD = 2.5 V
10
VDD = 3 V
8.0
6.0
-50
-25
0
25
50
AMBIENT TEMPERATURE IN °C
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
75
100
Dwg. GH-028-6
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of supply voltage
SWITCH POINTS
60
SWITCH POINTS IN GAUSS
40
BOPS
BRPS
20
TA = 25°C
0
-20
BRPN
BOPN
-40
-60
2.4
2.6
2.8
3.0
3.2
3.4
SUPPLY VOLTAGE IN VOLTS
3.6
Dwg. GH-057-1
A3210-- SUPPLY CURRENT
16
200
14
AVERAGE SUPPLY CURRENT IN µA
AVERAGE SUPPLY CURRENT IN µA
A3209-- SUPPLY CURRENT
220
180
160
140
120
2.4
TA = 25°C
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE IN VOLTS
www.allegromicro.com
3.4
3.6
Dwg. GH-058-6
12
10
8.0
6.0
2.4
TA = 25°C
2.6
2.8
3.0
3.2
SUPPLY VOLTAGE IN VOLTS
3.4
3.6
Dwg. GH-058-5A
5
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
CRITERIA FOR DEVICE QUALIFICATION
All Allegro sensors are subjected to stringent qualification requirements prior to being released to production.
To become qualified, except for the destructive ESD tests, no failures are permitted.
6
Qualification Test
Test Method and Test Conditions
Test Length
Samples
Biased Humidity (HAST)
TA = 130°C, RH = 85%
50 hrs
77
VDD = VOUT = 3 V
High-Temperature
Operating Life (HTOL)
JESD22-A108,
TA = 150°C, TJ ≤ 165°C
408 hrs
77
VDD = VOUT = 3 V
Accelerated HTOL
TA = 175°C, TJ ≤ 190°C
504 hrs
77
VDD = VOUT = 3 V
Autoclave, Unbiased
JESD22-A102, Condition C,
TA = 121°C, 15 psig
96 hrs
77
High-Temperature
(Bake) Storage Life
MIL-STD-883, Method 1008,
TA = 170°C
1000 hrs
77
Temperature Cycle
MIL-STD-883, Method 1010,
-65°C to +150°C
500 cycles
77
Latch-Up
—
Pre/Post
Reading
6
Electro-Thermally
Induced Gate Leakage
—
Pre/Post
Reading
6
ESD,
Human Body Model
CDF-AEC-Q100-002
Pre/Post
Reading
3 per
test
Test to failure,
All leads > 5 kV
ESD,
Machine Model
JESD22-A115
Pre/Post
Reading
3 per
test
Test to failure,
All leads > 350 V
Electrical Distributions
Per Specification
—
30
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Comments
3209 AND 3210
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 (480 µs for the A3209Ex and 60 ms for the A3210Ex).
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.
SAMPLE
& HOLD
+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 dependencies, 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-andhold 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 temperature
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.
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.
www.allegromicro.com
—
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 magnetic
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.
As used here, negative flux densities are defined as less
than zero (algebraic convention) and -50 G is less than +10 G.
7
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
(±0.005” [0.13 mm] die placement)
OUTPUT OFF
5V
MAX
B OPS
OUTPUT VOLTAGE
B OPN
Package Designator ‘LH’
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
OUTPUT ON
0
0
-B
3
0.038"
0.96 mm
BRPS
BRPN
0.059"
1.49 mm
A
+B
MAGNETIC FLUX
1
Dwg. GH-043-1
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.
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.
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
2
Dwg. MH-025
Package Designators ‘UA’, UA-LC', and ‘UA-TL’
ACTIVE AREA DEPTH
0.018"
0.46 mm
NOM
0.081"
2.06 mm
0.057"
1.45 mm
A
BRANDED
SURFACE
1
2
3
www.allegromicro.com
Dwg. MH-011-11
2
OUTPUT
SUPPLY
(3 V BATTERY)
1
X
V
DD
3
50 kΩ
10 pF
0.1 µF
8
Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.
Dwg. EH-013-2
Allegro
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘LH’
(fits SC-74A solder-pad layout)
Dimensions in Inches
(for reference only)
3.10
2.90
0.122
0.114
0.020
0.012
0.083
0.073
3
1
2
Dimensions in Millimeters
(controlling dimensions)
0.50
0.30
0.0079
0.0050
0.118
0.106
0.020 MIN
0.022
0.006
0.000
1
3.00
2.70
2
0.25 MIN
0° TO 8°
REF
0.037
BSC
3
0.55
0° TO 8°
REF
2.10
1.85
0.20
0.127
0.95
BSC
0.043
0.035
0.049
0.035
1.10
0.90
1.25
0.90
0.15
0.00
Dwg. MA-010-3B in
Dwg. MA-010-3B mm
0.028
0.70
3
3
1.00
0.039
2.40
0.094
1
1
2
2
0.95
0.037
Dwg. MA-011-3 in
Dwg. MA-011-3 mm
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.
www.allegromicro.com
9
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘UA’
Dimensions in Millimeters
(for reference only)
Dimensions in Inches
(controlling dimensions)
4.17
4.04
0.164
0.159
0.062
0.058
45°
1.57
1.47
45°
0.122
0.117
3.10
2.97
45°
0.085
1
2
3
45°
0.031
2.16
MAX
1
2
0.0173
0.0138
0.640
0.600
0.0189
0.0142
SEE NOTE
0.79
16.26
15.24
BSC
0.44
0.35
0.48
0.36
SEE NOTE
0.050
1.27
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 option within limits shown.
3. Height does not include mold gate flash.
4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm).
5. Where no tolerance is specified, dimension is nominal.
10
3
MAX
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
BSC
Dwg. MH-014E mm
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
Surface-Mount Lead Form (order A32xxEUA-TL)
Dimensions in Millimeters
(for reference only)
Dimensions in Inches
(controlling dimensions)
2.41
0.095
±0.13
±0.005
0.051
0.002
MAX
MAX
0.004 0°–8°
MAX
0.10
0.020
MAX
MIN
FLAT
Dwg. MH-015 in
0°–8°
0.51
MIN
FLAT
Dwg. MH-015 mm
Radial Lead Form (order A32xxEUA-LC)
1
2
3
0.108"
(2.74 mm)
0.620"
0.500"
(15.7 mm
12.7 mm)
The products described herein are manufactured under one or
more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.
0.100"
(2.5 mm)
Dwg. MH-026
NOTE: Lead-form dimensions are the nominals produced on the
forming equipment. No dimensional tolerance is implied or
guaranteed for bulk packaging (500 pieces per bag).
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 responsibility for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
www.allegromicro.com
11
3209 AND 3210
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
HALL-EFFECT SENSORS
Partial Part
Number
Avail. Oper.
Characteristics at TA = +25°C
Temp.
BOP max
BRP min
Bhys typ
Features
HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys
3240
3209
3210
3361
3362
3161
3141
3235
E/L
E
E
E
E
E
E/L
S
5140
3142
3143
3144
3122
3123
3121
E
E/L
E/L
E/L
E/L
E/L
E/L
+50
±60
±60
+125
+125
+160
+160
+175
-25
+200
+230
+340
+350
+400
+440
+450
+5.0
±5.0
±5.0
+40
+40
+30
+10
+25
-175
+50
+75
+165
+50
+140
+180
+125
10
7.7
7.7
5.0*
5.0*
20
55
15*
15*
55
55
55
55
105
105
105
Notes
chopper stabilized
1
400 µW, chopper stabilized
25 µW, chopper stabilized
2-wire, chopper stabilized, inverted output
2-wire, chopper stabilized
2-wire
output 1
output 2
300 mA power driver output
2
2
1
†
HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys
3260
E/L
+30
-30
20
bipolar switch, chopper stabilized
3280
E/L
+40
-40
45
chopper stabilized
3134
E/L
+50
-50
27
bipolar switch
3133
K/L/S
+75
-75
52
bipolar switch
3281
E/L
+90
-90
100
chopper stabilized
3132
K/L/S
+95
-95
52
bipolar switch
3187
E/L
+150
-150
100*
3177
S
+150
-150
200
3625
S
+150
-150
200
900 mA power driver output
1, 3
3626
S
+150
-150
200
400 mA power driver output
1, 3
3195
E/L
+160
-160
220
active pulldown
1
3197
L
+160
-160
230
1
3175
S
+170
-170
200
3188
E/L
+180
-180
200*
3283
E/L
+180
-180
300
chopper stabilized
3189
E/L
+230
-230
100*
3275
S
+250
-250
100*
3
3185
E/L
+270
-270
340*
Operating Temperature Ranges:
S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C
Notes 1. Protected.
2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc
motor control. Outputs may be tied together for omnipolar operation.
3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control.
* Minimum. ‡ Maximum
† Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal
for reliable operation over operating temperature range.
12
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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