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Электронный компонент: 3214

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The A3213xx and A3214xx integrated circuits are ultra-sensitive, pole
in de pen dent Hall-effect switches with a latched digital output. They are
es pe cial ly suited for operation in battery-operated, hand-held equip ment such
as cellular and cordless tele phones, pagers, and palmtop com put ers. A 2.4 volt
to 5.5 volt operation and a unique clocking scheme reduce the average op er -
at ing power requirements the A3213xx to 825 W, the A3214xx to 14 W
(typical at 2.75 V)! Except for operating duty cycle and average operating
current, the A3213xx and A3214xx are identical.
Unlike other Hall-effect switches, either a north or south pole of suf fi cient
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 (dy-

nam ic offset cancellation), which reduces the residual offset voltage normally
caused by device overmolding, temperature de pen den cies, and thermal stress.
These devices include on a single silicon chip a Hall-voltage generator,
small-signal amplifier, chopper sta bi li za tion, 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.
Range 'E' devices are rated for operation over a tem per a ture range of
-40C to +85C; range 'L' devices are rated for operation over a tem per a ture
range of -40C to +150C. Two package styles provide a mag net i cal ly op ti -
mized pack age for most ap pli ca tions. `LH' is a min ia ture 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.
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
ESD Protected to 5 kV
Sol id-State Reliability
Small Size
Easily Manufacturable With Magnet Pole Independence
Data Sheet
27622.62F
Package Designator `LH' Pinning
(SOT23W)
3213
AND
3214
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25C
Supply Voltage, V
DD
.............................. 6 V
Magnetic Flux Density, B .......... Unlimited
Output Off Voltage, V
OUT
...................... 6 V
Output Current, I
OUT
........................... 1 mA
Junction Temperature, T
J
................ +170C
Operating Temperature Range, T
A
Suffix 'E' ...................... -40C to +85C
Suffix 'L' ................... -40C to +150C
Storage Temperature Range,
T
S
.............................. -65C to +170C
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.
Pinning is shown viewed from branded side.
MICROPOWER, ULTRA-SENSITIVE
HALL-EF FECT SWITCHES
Dwg. PH-016-1
V
DD
1
2
3
SUPPL
Y
OUTPUT
GROUND
3213
AND
3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2
Product Selection Guide
Part Number
Pb-free
Packing*
Mounting
Ambient, T
A
(C)
DC
(%)
I
DDAVG(TYP)
(A)
A3213ELHLT
7-in. reel
3000 pieces/reel
Surface Mount
40 to 85
25
460
A3213ELHLT-T
Yes
A3213EUA
Bulk
500 pieces/bag
SIP through hole
A3213EUA-T
Yes
A3213LLHLT
7-in. reel
3000 pieces/reel
Surface Mount
40 to 150
A3213LLHLT-T
Yes
A3213LUA
Bulk
500 pieces/bag
SIP through hole
A3213LUA-T
Yes
A3214ELHLT
7-in. reel
3000 pieces/reel
Surface Mount
40 to 85
0.10
11
A3214ELHLT-T
Yes
A3214EUA
Bulk
500 pieces/bag
SIP through hole
A3214EUA-T
Yes
A3214LLHLT
7-in. reel
3000 pieces/reel
Surface Mount
40 to 150
A3214LLHLT-T
Yes
A3214LUA
Bulk
500 pieces/bag
SIP through hole
A3214LUA-T
Yes
*Contact Allegro for additional packing options.
3213
AND
3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3
FUNCTIONAL BLOCK DIAGRAM
Copyright 2003 Allegro MicroSystems, Inc.
Package Designator `UA' Pinning
(SIP)
TIMING
LOGIC
Dwg. FH-020-5
LATCH
GROUND
OUTPUT
SUPPLY
X
DYNAMIC
OFFSET CANCELLATION
SWITCH
SAMPLE
& HOLD
Dwg. PH-016
1
SUPPLY
V
DD
GROUND
3
2
OUTPUT
X
Pinning is shown viewed from branded side.
600
400
200
20
60
100
140
0
AMBIENT TEMPERATURE in



C
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
Dwg. GH-046-9
PACKAGE
SUFFIX "UA"
R
JA
= 165
C/W
40
80
120
180
700
500
300
100
160
PACKAGE
SUFFIX "LH"
R
JA
= 228
C/W
800
TEMP.
CODE "E"
TEMP.
CODE "L"
NOTE Allowable package power dissipation will not be exceeded
unless Absolute Maximum Ratings (page 1) are exceeded.
3213
AND
3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
www.allegromicro.com
4
ELECTRICAL CHARACTERISTICS: unless otherwise noted
over operating voltage and temperature range.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Operate Points
B
OPS
South pole to branded side
42
70
G
B
OPN
North pole to branded side
-70
-48
G
Release Points
B
RPS
South pole to branded side
10
32
G
B
RPN
North pole to branded side
-38
-10
G
Hysteresis
B
hys
|B
OPx
- B
RPx
|
10
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. B
OPx
= operate point (output turns ON); B
RPx
= release point (output turns OFF).
3. Typical Data is at T
A
= +25C and V
DD
= 3.0 V and is for design information only.
4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
MAGNETIC CHARACTERISTICS: over operating voltage and temperature range.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage Range
V
DD
Operating
1)
2.4
3.0
5.5
V
Output Leakage Current
I
OFF
V
OUT
= 5.5 V, B
RPN
< B < B
RPS
<1.0
1.0
A
Output On Voltage
V
OUT
I
OUT
= 1 mA, V
DD
= 3.0 V
100
300
mV
Awake Time
t
awake
60
90
s
Period
t
period
A3213xx
240
360
s
A3214xx
60
90
ms
Duty Cycle
d.c.
A3213xx
25
%
A3214xx
0.10
%
Chopping Frequency
f
C
340
kHz
Supply Current
I
DD(EN)
Chip awake (enabled)
2.0
mA
I
DD(DIS)
Chip asleep (disabled)
8.0
A
I
DD(AVG)
A3213xx 460
850 A
A3214xx 11
22 A
ESD, Human Body Model
Per CDF-AEC-Q100-002
5.0
kV
ESD, Machine Model
Per JESD22-A115
350
V
NOTES: 1. Operate and release points will vary with supply voltage.
2. B
OPx
= operate point (output turns ON); B
RPx
= release point (output turns OFF).
3. Typical Data is at T
A
= +25C and V
DD
= 3.0 V and is for design information only.
3213
AND
3214
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
5
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature (V
DD
= 3 V)
A3213xx
A3214xx
TEMPERATURE, T
A
(
C)
TEMPERATURE, T
A
(
C)
SWITCH POINTS, B (G)
AVG, SUPPLY CURRENT,
I
DD
(
A)
TEMPERATURE, T
A
(
C)
OUTPUT ON VOLTAGE,
V
OUT
(mV)
TEMPERATURE, T
A
(
C)
AVG, SUPPLY CURRENT,
I
DD
(
A)