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Details, datasheet, quote on part number:3212
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Datasheet text preview:
3212
Package Suffix `LH' Pinning
(SOT23W)
MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCH
The A3212 integrated circuit is an ultra-sensitive, pole independent Halleffect switch with a latched digital output. This sensor is especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. A 2.5 volt to 3.5 volt operation and a unique clocking scheme reduce the average operating power requirements to less than 15 µW with a 2.75 volt supply. 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 allow 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. This device includes 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. 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 27622.61
3
V
DD
1
X
2
GROUND
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 Junction Temperature, TJ ...... +170°C Operating Temperature Range, TA Suffix 'E' ............ -40°C to +85°C Suffix 'L' .......... -40°C to +150°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.
OUTPUT
SUPPLY
FEATURES
s s s s Micropower Operation Operation 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
s s s s
Always order by complete part number: the prefix `A' + the basic four-digit part number + the suffix `E' or 'L' to indicate operating temperature range + a suffix to indicate package style, e.g., A3212ELH .
3212 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
SWITCH
TIMING LOGIC
DYNAMIC OFFSET CANCELLATION
OUTPUT
SAMPLE & HOLD
LATCH
X
GROUND
Dwg. FH-020-5
Package Suffix `UA' Pinning
(ultra-mini-SIP)
800
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
Suffix "UA" RJA = 165°C/W 600
500 Suffix "LH" RJA = 228°C/W 400
V
DD
1
300
X
2
700
3
200
GROUND
100
0 20 40 60 100 80 120 AMBIENT TEMPERATURE in °C 140 160 180
Dwg. PH-016
Dwg. GH-046-3B
Pinning is shown viewed from branded side.
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2002 Allegro MicroSystems, Inc.
OUTPUT
SUPPLY
3212 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS over operating voltage and temperature range (unless otherwise specified).
Limits Characteristic Supply Voltage Range Output Leakage Current Output On Voltage Awake Time Period Duty Cycle Chopping Frequency Supply Current Symbol VD D IO F F VOUT ta w a k e t period d.c. fC ID D ( E N ) ID D ( D I S ) I DD(AVG) Chip awake (enabled) Chip asleep (disabled) VDD = 2.75 V VDD = 3.5 V Test Conditions Operating1 VOUT = 3.5 V, BRPN < B < BRPS IOUT = 1 mA, VDD = 2.75 V Min. 2.5 Typ. 2.75 <1.0 100 45 45 0.1 340 5.1 6.7 Max. 3.5 1.0 300 90 90 2.0 8.0 10 10 Units V µA mV µs ms % kHz mA µA µA 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 over operating voltage and temperature range (unless otherwise specified).
Limits Characteristic Operate Points Symbol B OPS BOPN Release Points B RPS BRPN Hysteresis B hys Test Conditions South pole to branded side North pole to branded side South pole to branded side North pole to branded side |BOPx - BRPx| Min. -55 10 Typ. 37 -40 31 -34 5.9 Max. 55 -10 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 = +25°C and VDD = 2.75 V and is for design information only.
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3212 MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
60
60
40
BOPS BRPS
40
BOPS BRPS
SWITCH POINTS IN GAUSS
20
SWITCH POINTS IN GAUSS
20
0
VDD = 2.75 V
0
TA = 25°C
-20 BRPN -40 BOPN
-20 BRPN -40 BOPN
-60 -50 -25 0 25 50 75 100 125 150
-60 2.4
2.6
2.8
3.0
3.2
3.4
3.6
Dwg. GH-057-2
AMBIENT TEMPERATURE IN °C
Dwg. GH-027-3
SUPPLY VOLTAGE IN VOLTS
SUPPLY CURRENT
7.0
7.0
AVERAGE SUPPLY CURRENT IN µA
6.0 VDD =3.5 V
AVERAGE SUPPLY CURRENT IN µA
6.0
5.0
VDD =2.75 V
5.0
VDD =2.5 V 4.0
4.0
TA = 25°C
3.0 -50
-25
0
25
50
75
100
125
150
3.0 2.4
2.6
2.8
3.0
3.2
3.4
3.6
Dwg. GH-058-7
AMBIENT TEMPERATURE IN ° C
Dwg. GH-028-11
SUPPLY VOLTAGE IN VOLTS
4
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3212 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 Biased Humidity (HAST) High-Temperature Operating Life (HTOL) Accelerated HTOL Test Method and Test Conditions TA = 130°C, RH = 85% JESD22-A108, TA = 150°C, TJ 165°C TA = 175°C, TJ 190°C Test Length 50 hrs 408 hrs Samples 77 77 Comments V D D = VO U T = 3 V V D D = VO U T = 3 V
504 hrs
77
V D D = VO U T = 3 V
Autoclave, Unbiased
JESD22-A102, Condition C, TA = 121°C, 15 psig MIL-STD-883, Method 1008, TA = 170°C MIL-STD-883, Method 1010, -65°C to +150°C --
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 Pre/Post Reading --
6
Electro-Thermally Induced Gate Leakage ESD, Human Body Model ESD, Machine Model Electrical Distributions
--
6
CDF-AEC-Q100-002
3 per test 3 per test 30
Test to failure, All leads > 5 kV Test to failure, All leads > 350 V
JESD22-A115
Per Specification
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