Datasheet 3209 Datasheet (ALLEGRO)

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27622.60A‡

3209

AND

3210

MICROPOWER, ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

Data Sheet

Package Suffix ‘LH’ Pinning

(SOT23W)

3

X

V

DD

12

SUPPLY

Pinning is shown viewed from branded side.

GROUND

Dwg. PH-016-1

ABSOLUTE MAXIMUM RATINGS

at T

= +25°C

A

OUTPUT

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 operat-

ing 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 opti-

mized 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

Supply Voltage, VDD............................. 5 V

Magnetic Flux Density, B .......... Unlimited

Output Off Voltage, V

Output Current, I

Junction Temperature, T

Operating Temperature Range,

T

............................... -40°C to +85°C

A

Storage Temperature Range,

T

.............................. -65°C to +170°C

S

Caution: These CMOS devices have input
static protection (Class 3) but are still
susceptible to damage if exposed to
extremely high static electrical charges.

OUT

..................... 5 V

OUT

.......................... 1 mA

............... +170°C

J

■ 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

X

TIMING

LOGIC

OUTPUT

800

700

600

500

400

300

Suffix "LH"
R

θJA

= 228°C/W

Suffix "UA"
R

θJA

= 165°C/W

DYNAMIC

OFFSET CANCELLATION

& HOLD

SAMPLE

LATCH

GROUND

Dwg. FH-020-5

Package Suffix ‘UA’ Pinning

(ultra-mini SIP)

X

V

DD

1

32

200

100

ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS

0

20 60 100 140

40 80 120 180

AMBIENT TEMPERATURE in °°°°C

2

SUPPLY

160

Dwg. GH-046-3B

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

Copyright © 2000, 2002 Allegro MicroSystems, Inc.

Pinning is shown viewed from branded side.

GROUND

Dwg. PH-016

OUTPUT

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

ELECTRICAL CHARACTERISTICS with C

BYPASS

= 0.1 µF,

over operating voltage and temperature range (unless otherwise specified).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage Range V

Output Leakage Current I

Output On Voltage V

Awake Time t

Period t

DD

OFF

OUT

awake

period

Operating

V

OUT

I

OUT

A3209Ex 240 480 720 µs

A3210Ex 30 60 90 ms

Duty Cycle d.c. A3209Ex – 12.5 – %

A3210Ex – 0.10 – %

Chopping Frequency f

Supply Current I

(2.5 ≤ VDD ≤3.5 V)

C

DD(EN)

I

DD(DIS)

I

DD(AVG)

Chip awake (enabled) 0.1 – 3.0 mA

Chip asleep (disabled) 1.0 10 50 µA

A3209Ex, V

A3209Ex, V

A3210Ex, V

A3210Ex, V

1)

= 3.5 V, B

RPN

< B < B

RPS

2.5 2.75 3.5 V

– «1.0 1.0 µA

= 1 mA, VDD = 2.5 V – 105 300 mV

30 60 90 µs

– 340 – kHz

= 2.75 V – 145 425 µA

DD

= 3.5 V – 195 425 µA

DD

= 2.75 V – 8.8 25 µA

DD

= 3.5 V – 13 60 µA

DD

NOTES: 1. Operate and release points will vary with supply voltage.

2. B

= operate point (output turns ON); B

OPx

3. Typical Data is at T

= +25°C and V

A

DD

MAGNETIC CHARACTERISTICS with C

= release point (output turns OFF).

RPx

= 2.75 V and is for design information only.

BYPASS

= 0.1 µF,

over operating voltage and temperature range (unless otherwise specified).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operate Points B

Release Points B

Hysteresis B

OPS

B

OPN

RPS

B

RPN

hys

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 T

= +25°C and V

A

= 2.75 V and is for design information only.

DD

South pole to branded side – 30 60 G

North pole to branded side -60 -35 – G

South pole to branded side 5.0 22 – G

North pole to branded side – -27 -5.0 G

|B

- B

OPx

| – 7.7 – G

RPx

www.allegromicro.com

3

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

TYPICAL OPERATING CHARACTERISTICS

as a function of temperature

60

SWITCH POINTS

40

20

0

-20

SWITCH POINTS IN GAUSS

-40

-60

-50

-25

AMBIENT TEMPERATURE IN °°°°C

B

OPS

B

RPS

VDD = 2.75 V

B

RPN

B

OPN

0 25 50 75 100

Dwg. GH-027-2

A3209-- SUPPLY CURRENT

220

200

A

µµ

180

VDD = 3 V

160

VDD = 2.5 V

-25

0 25 50 75 100

AMBIENT TEMPERATURE IN °°°°C

AVERAGE SUPPLY CURRENT IN µµ

140

120

-50

4

VDD = 3.5 V

Dwg. GH-028-7

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

16

14

A

µµ

12

10

8.0

AVERAGE SUPPLY CURRENT IN µµ

6.0

-50

A3210-- SUPPLY CURRENT

VDD = 3.5 V

VDD = 2.5 V

VDD = 3 V

-25

0 25 50 75 100

AMBIENT TEMPERATURE IN °°°°C

Dwg. GH-028-6

60

TYPICAL OPERATING CHARACTERISTICS

SWITCH POINTS

HALL-EFFECT SWITCHES

as a function of supply voltage

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

40

20

0

-20

SWITCH POINTS IN GAUSS

-40

-60

2.4

2.6

SUPPLY VOLTAGE IN VOLTS

A3209-- SUPPLY CURRENT

220

B

OPS

B

RPS

TA = 25°C

B

RPN

B

OPN

2.8 3.0 3.2 3.4 3.6

Dwg. GH-057-1

A3210-- SUPPLY CURRENT

16

200

A

µµ

180

160

140

AVERAGE SUPPLY CURRENT IN µµ

120

2.4

2.6

www.allegromicro.com

TA = 25°C

2.8 3.0 3.2 3.4 3.6

SUPPLY VOLTAGE IN VOLTS

Dwg. GH-058-6

14

A

µµ

12

10

8.0

AVERAGE SUPPLY CURRENT IN µµ

6.0

2.4

2.6

2.8 3.0 3.2 3.4 3.6

SUPPLY VOLTAGE IN VOLTS

TA = 25°C

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.

Qualification Test Test Method and Test Conditions Test Length Samples Comments

Biased Humidity (HAST) T

High-Temperature JESD22-A108, 408 hrs 77 VDD = V
Operating Life (HTOL) T

Accelerated HTOL T

= 130°C, RH = 85% 50 hrs 77 V

A

= 150°C, TJ ≤ 165°C

A

= 175°C, TJ ≤ 190°C 504 hrs 77 V

A

DD

DD

= V

= V

OUT

OUT

OUT

= 3 V

= 3 V

= 3 V

Autoclave, Unbiased JESD22-A102, Condition C, 96 hrs 77

T

= 121°C, 15 psig

A

High-Temperature MIL-STD-883, Method 1008, 1000 hrs 77
(Bake) Storage Life T

= 170°C

A

Temperature Cycle MIL-STD-883, Method 1010, 500 cycles 77

-65°C to +150°C

Latch-Up — Pre/Post 6

Reading

Electro-Thermally — Pre/Post 6
Induced Gate Leakage Reading

ESD, CDF-AEC-Q100-002 Pre/Post 3 per Test to failure,
Human Body Model Reading test All leads > 5 kV

ESD, JESD22-A115 Pre/Post 3 per Test to failure,
Machine Model Reading test All leads > 350 V

Electrical Distributions Per Specification — 30

6

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

HALL-EFFECT SWITCHES

FUNCTIONAL DESCRIPTION

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

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.

PERIOD

IDD(EN)

IDD(DIS)

0

60 µs - "AWAKE"

"SLEEP"

SAMPLE &
OUTPUT LATCHED

Dwg. WH-017-1

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.

+V

& HOLD

SAMPLE

X

Dwg. EH-012-1

B

+V

—

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 B

(or is less than B

OPS

). After turn-on, the

OPN

output is capable of sinking up to 1 mA and the output voltage
is V
release point B

. When the magnetic field is reduced below the

OUT(ON)

(or increased above B

RPS

RPN

), the device output
switches high (turns off). The difference in the magnetic
operate and release points is the hysteresis (B

) of the device.

hys

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.

www.allegromicro.com

7

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

5 V

MAX

B

OPN

OUTPUT OFF

B

OPS

SENSOR LOCATIONS

(±0.005” [0.13 mm] die placement)

Package Designator ‘LH’

OUTPUT VOLTAGE

B

RPN

0

-B

0

MAGNETIC FLUX

B

RPS

OUTPUT ON

+B

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

ACTIVE AREA DEPTH

0.011"

0.28 mm
NOM

0.059"

1.49 mm

3

0.038"

0.96 mm

A

1 2

Dwg. MH-025

Package Designators ‘UA’, UA-LC', and ‘UA-TL’

ACTIVE AREA DEPTH

0.0195"

0.50 mm
NOM

0.081"

2.06 mm

0.057"

1.45 mm

A

BRANDED
SURFACE

1 32

www.allegromicro.com

Dwg. MH-011-11A

Although sensor location is accurate to three sigma for a

2

10 pF

3

X

1

DD

V

0.1 µF

8

OUTPUT

50 kΩ

SUPPLY
(3 V BATTERY)

Dwg. EH-013-2

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

particular design, product improvements may result in small
changes to sensor location.

Allegro

HALL-EFFECT SWITCHES

PACKAGE DESIGNATOR ‘LH’

(fits SC-74A solder-pad layout)

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

0.083

0.073

0.022

REF

0.006

0.000

0.122

0.114

0.020

0.012

12

Dimensions in Inches

(for reference only)

3

0.118

0.106

GAUGE PLANE

SEATING PLANE

0.037

BSC

0.045

0.0079

0.0050

0.032

0° TO 8°

0.020

BSC

Dwg. MA-010-3C in

0.020

MIN

0.55

REF

0.15

0.00

2.10

1.85

Dimensions in Millimeters

3.10

2.90

0.50

0.30

3

12

(controlling dimensions)

3.00

2.70

GAUGE PLANE

SEATING PLANE

0° TO 8°

0.95

BSC

1.13

0.20

0.127

0.87

0.25

BSC

0.25

MIN

Dwg. MA-010-3C mm

0.039

12

0.028

3

1.00

0.094

0.037

Dwg. MA-011-3 in

0.70

3

2.40

12

0.95

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 Inches

(controlling dimensions)

Dimensions in Millimeters

(for reference only)

SEE NOTE

45°

0.122

0.117

0.640

0.600

0.085

123

MAX

0.164

0.159

0.050

BSC

0.062

0.058

0.031

0.0189

0.0142

0.0173

0.0138

Dwg. MH-014E in

45°

SEE NOTE

45°

3.10

2.97

16.26

15.24

2.16

123

MAX

4.17

4.04

1.27

BSC

1.57

1.47

45°

0.79

0.44

0.35

0.48

0.36

Dwg. MH-014E 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. Recommended minimum PWB hole diameter to clear
transition area is 0.035" (0.89 mm).

5. Where no tolerance is specified, dimension is nominal.

6. Supplied in bulk pack (500 pieces per bag).

10

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

Radial Lead Form (order A32xxEUA-LC)

123

0.620"

0.500"

(15.7 mm

12.7 mm)

0.100"

(2.5 mm)

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).

0.108"

(2.74 mm)

Dwg. MH-026

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

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.

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.

11

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

HALL-EFFECT SENSORS

UNIPOLAR HALL-EFFECT DIGITAL SWITCHES

Partial Operate Release Hysteresis Replaces

Part Point (G) Point (G) (G) Oper. and

Number

A3121x 220 to 500 80 to 410 60 to 150 E, L LT, UA 3019, 3113, 3119
A3122x 260 to 430 120 to 360 70 to 140 E, L LT, UA
A3123x 230 to 470 160 to 330 70 to 140 E, L LT, UA
A3141x 30 to 175 10 to 145 20 to 80 E, L LT, UA 3040, 3140
A3142x 115 to 245 60 to 190 30 to 80 E, L LT, UA
A3143x 205 to 355 150 to 300 30 to 80 E, L LT, UA

A3144x 35 to 450 25 to 430 >20 E, L LT, UA 3020, 3120
A3161E <160 (Typ 130) >30 (Typ 110) 5 to 80 E LT, UA 2-wire operation
A3163E <160 (Typ 98) >30 (Typ 79) 5 to 40 E LT, UA 2-wire

A3240x <50 (Typ 35) >5 (Typ 25) Typ 10 E, L LH, LT, UA chopper stabilized

A3250x <50 to >350 _ 5 to 35 J, L UA programmable, chopper stabilized

A3251x <50 to >350 _ 5 to 35 J, L UA programmable, chopper stabilized

A3361E <125 >40 5 to 30 E LH, LT, UA

A3362E <125 >40 5 to 30 E LH, LT, UA

Over Oper. Voltage & Temp. Range

Temp. Packages Comments

2-wire, chopper stabilized,

output normally high

2-wire, chopper stabilized,

output normally low

MICROPOWER OMNIPOLAR HALL-EFFECT DIGITAL SWITCHES

Partial Operate Release Hysteresis Average

Part Points (G) Points (G) (G) Oper. Supply

Number

A3209E >-60, <60 <-5, >5 Typ 7.7 E LH, UA <425 (Typ 145)
A3210E >-60, <60 <-5, >5 Typ 7.7 E LH, UA <60 (Typ 8.8)
A3212E >-55, <55 <-10, >10 Typ. 8 E LH, UA <10 (Typ 4.2)

Over Oper. Voltage & Temp. Range

Temp. Packages Current (µA)

12

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]