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Part: A3361LT
Category:
Communication
-> Wireless
-> Switches
Description: 2-wire, Chopper-stabilized, Hall-effect Switches
Company: Allegro Micro Systems, Inc.
Datasheet: Download A3361LT datasheet File size : 116 kB
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Datasheet text preview:
3361 AND 3362
Suffix Code 'LH' Pinning
2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
The A3361x and A3362x Hall-effect switches are extremely temperature-stable and stress-resistant sensors. Superior performance over temperature is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The two devices differ only in output polarity; the A3361x output current goes low in the presence of a south pole of sufficient strength; the A3362x output current goes high. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a constant-current open-collector output. An on-board regulator permits operation with supply voltages of 3.5 to 24 volts. Noise radiation is limited by control of the output current slew rate. Three package styles provide a magnetically optimized package for most applications. Suffix `xLH' is a miniature low-profile surfacemount package, `xLT' is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; while suffix `xUA' is a threelead ultra-mini-SIP for through-hole mounting.
Data Sheet 27621.50
3
NC 1 2
X
GROUND NO (INTERNAL) CONNECTION
Dwg. PH-003-5
Pinning is shown viewed from branded side.
PRELIMINARY INFORMATION
(subject to change without notice) August 28, 2000
SUPPLY
FEATURES
ABSOLUTE MAXIMUM RATINGS at TA=+25°C
Supply Voltage, VCC ...... 26.5 V Reverse Battery Voltage, VRCC .......... -16 V Magnetic Flux Density, B .. Unlimited Package Power Dissipation, PD . See Graph Junction Temperature, TJ ...... +170°C Operating Temperature Range, TA ....... -40°C to +85°C Storage Temperature Range, TS ...... -65°C to +170°C Always order by complete part number: the prefix 'A' + the basic four-digit part number + a suffix to indicate operating temperature range (E) + a two-letter suffix to indicate package style, e.g., A3361ELH .
I Internal Current Regulator for 2-Wire Operation I Resistant to Physical Stress I Superior Temperature Stability I Operation From Unregulated Supply I Solid-State Reliability I Small Size
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
REG.
TO ALL SUBCIRCUITS
DYNAMIC OFFSET CANCELLATION
SAMPLE & HOLD
X
LOW-PASS FILTER
GROUND
Dwg. FH-020-6
Suffix Code 'UA' Pinning (SIP)
Suffix Code 'LT' Pinning (SOT-89/TO-243AA)
X
NC
X
1
2
3
1
2
3
GROUND
GROUND
Dwg. PH-003-7A
Dwg. PH-003-6
Pinning is shown viewed from branded side.
2
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc.
NO (INTERNAL) CONNECTION
GROUND
SUPPLY
SUPPLY
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits Characteristic Supply Voltage Output Current Symbol VCC I GND(L) I GND(H) Chopping Frequency Output Settling Time Output Rise Time Output Fall Time Reverse Battery Current fC tsd tr tf ICC CL = 20 pF CL = 20 pF CL = 20 pF VRCC = -16 V Test Conditions Operating Output Current Low Output Current High Min. 3.5 5.0 12 Typ. 12 340 3.5 3.5 Max. 24 6.9 17 50 -1 5 Units V mA mA kHz µs µs µs mA
NOTE: Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits Characteristic Operate Point Release Point Hysteresis Symbol B OP BR P B hys Test Conditions B > BOP, IGND = LOW B < BRP, IGND = HIGH B OP - BRP Min. 40 5.0 Typ. Max. 125 30 Units G G G
A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits Characteristic Operate Point Release Point Hysteresis Symbol B OP BR P B hys Test Conditions B > BOP, IGND = HIGH B < BRP, IGND = LOW B OP - BRP Min. 40 5.0 Typ. Max. 125 30 Units G G G
www.allegromicro.com
3
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
OUTPUT CHARACTERISTICS A3361x
+I
A3362x
+I
IOUT + ICC
IOUT + ICC
OUTPUT CURRENT
OUTPUT CURRENT
B RP
B OP
B RP
B OP
ICC
ICC
0 0 FLUX DENSITY +B
Dwg. GH-007-4
0 0 FLUX DENSITY +B
Dwg. GH-007-3
4
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
(±0.005" [0.13 mm] die placement) Package Designator "LH"
ACTIVE AREA DEPTH 0.011" 0.28 mm NOM 0.059" 1.49 mm 3 0.038" 0.96 mm
SENSOR LOCATIONS
700
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
600
Suffix "UA" RJA = 206°C/W
500
Suffix "LH" RJA = 248°C/W
400
Suffix "LT" RJA = 258°C/W
300
A
1 2
Dwg. MH-025
200
100
Package Designator "LT"
ACTIVE AREA DEPTH 0.030" 0.76 mm NOM
0 20 40 60 80 120 100 AMBIENT TEMPERATURE in °C 140 160 180
Dwg. GH-046-4
0.088" 2.24 mm 0.045" 1.14 mm
A
1 2 3
Dwg. MH-008-8
Package Designators "UA" and "UA-TL"
ACTIVE AREA DEPTH 0.018" 0.46 mm NOM
0.080" 2.04 mm
0.056" 1.44 mm
Allegro
A
BRANDED SURFACE 1 2 3
Dwg. MH-011-9A
Although sensor location is accurate to three sigma for a particular design, product improvements may result in small changes to sensor location.
www.allegromicro.com
5
Others parts begin by a3
A3-1 A3-2 A3-3 A3-4
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