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3210
PRELIMINARY INFORMATION
(subject to change without notice) June 23, 1999 Package Suffix `LH' Pinning
3
MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
The A3210ELH and A3210EUA Hall-effect switches 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 to 3.5 volt operation and a unique clocking scheme reduce the average operating power requirements to typically 30 W! 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 A3210ELH and A3210EUA are rated for operation over a temperature range of -40C to +85C. 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.
Data Sheet 27622.60
V
DD
1
X
2
GROUND
Dwg. PH-016-1
Pinning is shown viewed from branded side.
OUTPUT
SUPPLY
ABSOLUTE MAXIMUM RATINGS
at TA = +25C Supply Voltage, VDD ............................. 5 V Magnetic Flux Density, B .......... Unlimited Output OFF Voltage, VOUT ................... 5 V Output Current, IOUT .......................... 1 mA Package Power Dissipation, PD . See Graph Junction Temperature, TJ ............... +170C Operating Temperature Range, TA ............................... -40C to +85C Storage Temperature Range, TS .............................. -65C to +170C
FEATURES
s s s s 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 s Solid-State Reliability s Small Size s 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 .
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
SWITCH
TIMING LOGIC
DYNAMIC OFFSET CANCELLATION
OUTPUT
SAMPLE & HOLD
LATCH
X
GROUND
Dwg. FH-020-5
Package Suffix `UA' Pinning
700
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
600
500
Suffix "UA" RJA = 206C/W
400
V
DD
300
1
200 Suffix "LH" RJA = 439C/W
X
2
3
GROUND
100
0 20 40 60 100 80 120 AMBIENT TEMPERATURE in C 140 160
Dwg. G
180
Dwg. PH-016
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1999, Allegro MicroSystems, Inc.
OUTPUT
SUPPLY
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
ELECTRICAL CHARACTERISTICS at VDD = 2.75 V, CBYPASS = 0.1 F, and over operating temperature range.
Limits Characteristic Supply Voltage Range Output Leakage Current Output ON Voltage Awake Time Period Duty Cycle Chopping Frequency Supply Current (2.5 VDD 3.5 V) Symbol VDD IOFF VOUT tawake tperiod d.c. fC IDD(EN) IDD(DIS) IDD(AVG) Chip awake (enabled) Chip asleep (disabled) VDD = 2.75 V VDD = 3.5 V 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 = +25C and VDD = 2.75 V and is for design information only. Test Conditions Operating1) VOUT = 3.5 V, BRPN < B < BRPS IOUT = 1 mA, VDD = 2.75 V Min. 2.5 - - 30 30 - - 0.1 1.0 2.0 2.0 Typ. 2.75 1.0 - 60 60 0.10 340 - 10 8.8 13 Max. 3.5 1.0 400 90 90 - - 3.0 50 25 60 Units V A mV s ms % kHz mA A A A
MAGNETIC CHARACTERISTICS at VDD = 2.75 V, CBYPASS = 0.1 F, and over operating temperature range.
Limits Characteristic Operate Points Symbol BOPS BOPN Release Points BRPS BRPN Hysteresis Bhys BOPx - BRPx Test Conditions Min. - -70 5.0 - - Typ. 30 -35 22 -27 7.7 Max. 70 - - -5.0 - Units G G G G 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 = +25C and VDD = 2.75 V and is for design information only.
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
TYPICAL OPERATING CHARACTERISTICS as a function of temperature
SWITCH POINTS
60
SUPPLY CURRENT
16
40
SWITCH POINTS IN GAUSS
BOPS
AVERAGE SUPPLY CURRENT IN A
14
VDD = 3.5 V
20
BRPS
12
0
VDD = 2.75 V
10
VDD = 3 V
VDD = 2.5 V
-20
BRPN BOPN
-40
8.0
-60 -50
-25
0
25
50
75
100
Dwg. GH-027-2
6.0 -50
-25
0
25
50
75
100
Dwg. GH-028-6
AMBIENT TEMPERATURE IN C
AMBIENT TEMPERATURE IN C
as a function of supply voltage
SWITCH POINTS
60 16
SUPPLY CURRENT
40
BRPS
20
AVERAGE SUPPLY CURRENT IN A
BOPS
14
SWITCH POINTS IN GAUSS
12
0
TA = 25C
10
-20
BRPN BOPN
-40
8.0
TA = 25C
-60 2.4
2.6
2.8
3.0
3.2
3.4
3.6
Dwg. GH-057-1
6.0 2.4
2.6
2.8
3.0
3.2
3.4
3.6
Dwg. GH-058-5A
SUPPLY VOLTAGE IN VOLTS
SUPPLY VOLTAGE IN VOLTS
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
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3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
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 Biased Humidity (HAST) High-Temperature Operating Life (HTOL) Accelerated HTOL Test Method and Test Conditions TA = 130C, RH = 85% JESD22-A108, TA = 150C, TJ = 165C JESD22-A108, TA = 175C, TJ = 190C JESD22-A102, Condition C, TA = 121C, 15 psig MIL-STD-883, Method 1008, TA = 170C MIL-STD-883, Method 1010, -65C to +150C -- Test Length 50 hrs 408 hrs Samples 77 77 Comments VDD = VOUT = 3 V VDD = VOUT = 3 V
504 hrs
77
VDD = VOUT = 3 V
Autoclave, Unbiased
96 hrs
77
High-Temperature (Bake) Storage Life Temperature Cycle
1000 hrs
77
500 cycles
77
Latch-Up
Pre/Post Reading Pre/Post Reading Pre/Post Reading --
6
Electro-Thermally Induced Gate Leakage ESD, Human Body Model Electrical Distributions
--
6
CDF-AEC-Q100-002
x per test 30
Test to failure, All leads > TBD
Per Specification
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
FUNCTIONAL DESCRIPTION
+V
Low Average Power. Internal timing circuitry activates the sensor for 60 s and deactivates it for the remainder of the 60 ms period (approximately 0.1% duty cycle). A short "wakeup" 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.
60 ms 60 s - "AWAKE"
X
IDD(EN)
"SLEEP" SAMPLE & OUTPUT LATCHED
Dwg. EH-012-1
IDD(DIS)
0
Dwg. WH-017
B +V
--
OUTPUT VOLTAGE
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 resistors by changing the direction of the current flowing through the Hall plate and Hall voltage measurement taps, while maintaining the Hall-voltage signal that is induced by the external magnetic flux. The signal is, then, captured by a sample-and-hold circuit. 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.
Operation. The output of these devices switch low (turn 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 goes 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.
5V MAX
OUTPUT OFF B OPN B OPS
BRPN
HALL VOLTAGE
BRPS
SAMPLE & HOLD
OUTPUT ON 0 -B 0 +B
Dwg. GH-043-1
MAGNETIC FLUX
+
Dwg. AH-011-2
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
SENSOR LOCATIONS
(0.005" [0.13 mm] die placement) Applications. 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 chopperstabilization 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
Package Designator `LH'
ACTIVE AREA DEPTH 0.011" 0.28 mm NOM
0.059" 1.49 mm 3 0.038" 0.96 mm
A
1 2
www.allegromicro.com
Dwg. MH-025
OUTPUT 10 pF
2
Package Designators `UA' and `UA-TL'
50 k
3
SUPPLY (3 V BATTERY) 0.1 F
Dwg. EH-013-2
ACTIVE AREA DEPTH 0.018" 0.46 mm NOM
DD
1
V
X
0.081" 2.06 mm
0.057" 1.45 mm
A
BRANDED SURFACE 1 2 3
Dwg. MH-011-11
Although sensor location is accurate to three sigma for a particular design, product improvements may result in small changes to sensor location.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
PACKAGE DESIGNATOR `LH'
(fits SC-74A solder-pad layout) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions)
0.122 0.114 0.018 0.012 0.083 0.073 0.022
REF 3 1 2
3.10 2.90
0.0079 0.0059 0.118 0.106 0 TO 8 0.037
BSC
0.45 0.30 2.10 1.85 0.55
REF 3 1 2
0.20 0.15 3.00 2.70 0 TO 8 0.95
BSC
0.020 MIN
0.25 MIN
0.006 0.000
0.043 0.035 0.049 0.035
Dwg. MA-010-3A in
0.15 0.00
1.10 0.90 1.25 0.90
Dwg. MA-010-3A mm
0.028
3
3
0.70 1.00
0.039 0.094
1 2
2.40
1 2
0.037
Dwg. MA-011-3 in
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.
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
PACKAGE DESIGNATOR `UA'
Dimensions in Inches (controlling dimensions)
0.164 0.159
Dimensions in Millimeters (for reference only)
4.17 4.04
45
0.062 0.058
45
1.57 1.47
0.122 0.117 45 0.031
3.10 2.97 45 0.79
0.085
MAX
1
2
3
2.16
MAX
1
2
3
0.640 0.600
0.015
16.26 15.24
0.38
SEE NOTE
0.016
SEE NOTE
0.41
0.050
BSC
Dwg. MH-014D in
1.27
BSC
Dwg. MH-014D mm
Surface-Mount Lead Form (Suffix `-TL')
0.095
0.005
2.41
0.13
0.002
MAX
0.051
MAX
0.004 0-8
MAX
0.020
MIN FLAT
Dwg. MH-015 in
0.10
MAX
0-8 0.51
MIN FLAT
Dwg. MH-015 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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
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 design of its products. 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 which may result from its use.
3210 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
HALL-EFFECT SENSORS SELECTION GUIDE
Partial Part Number 3240 3210 3361 3362 3161 3141 3235 5140 3142 3143 3144 3122 3123 3121 3150 Avail. Oper. Characteristics at TA = +25C Temp. BOP(max) BRP(min) Bhys(typ) Features HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys E/L E E E E E/L S E E/L E/L E/L E/L E/L E/L J +50 70 +120 +120 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +40 to +850 +5.0 5.0 +50 +50 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 - 10 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 20 chopper stabilized micropower, chopper stabilized 2-wire, chopper stabilized 2-wire, chopper stabilized 2-wire output 1 output 2 300 mA output Notes 1
2 2 1, 3
programmable, chopper stabilized
1
HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar, 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 outputs 1, 3, 5 3626 S +150 -150 200 400 mA outputs 1, 3, 5 3195 E/L +160 -160 220 1, 4 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* 5 3185 E/L +270 -270 340* Operating Temperature Ranges: S = -20C to +85C, E = -40C to +85C, J = -40C to +115C, K = -40C to +125C, L = -40C to +150C 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. 3. Power driver output. 4.Active pull down. 5.Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. * Minimum. 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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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