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A3161UA Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer A3161UA
Beschreibung HALL-EFFECT SWITCH FOR 2-WIRE APPLICATIONS
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 8 Seiten
A3161UA Datasheet, Funktion
V
CC
12
3
3161
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
This Hall-effect switch is a monolithic integrated circuit designed to
operate continuously over extended temperatures to +85°C. The unipo-
lar switching characteristic makes this device ideal for use with a simple
bar or rod magnet. The A3161ELT and A3161EUA are identical except
for package.
Each device includes a voltage regulator for operation with supply
voltages of 3.5 to 25 volts, reverse battery protection diode, quadratic
Hall-voltage generator, temperature compensation circuitry, small-signal
amplifier, Schmitt trigger, and a constant-current open-collector output.
Noise radiation is limited by control of the output current slew rate.
Two package styles provide a magnetically optimized package for
most applications. Suffix ‘LT’ is a miniature SOT-89/TO-243AA
transistor package for surface-mount applications; suffix ‘UA’ is a three-
lead ultra-mini SIP for through-hole mounting.
Dwg. PH-003-3
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC
Continuous ................................. 28 V
Surge (tw 100 ms) .................... 40 V
Reverse Battery Voltage, VRCC
Continuous ................................ -25 V
Surge (tw 100 ms) ................... -40 V
Magnetic Flux Density, B ....... Unlimited
Output OFF Voltage, VOUT .............. 28 V
Operating Temperature Range,
TA ............................. -40°C to +85°C
Storage Temperature Range,
TS ........................... -65°C to +170°C
FEATURES and BENEFITS
I Internal Current Regulator for 2-Wire Operation
I Output Slew Rate Controlled
I 3.5 V to 25 V Operation … Needs Only An Unregulated Supply
I Reverse Battery Protection
I Excellent Temp. Stability
I Activate with Small, Commercially Available Permanent Magnets
I Small Size
I Solid-State Reliability … No Moving Parts
I Resistant to Physical Stress
Always order by complete part number, e.g., A3161ELT .






A3161UA Datasheet, Funktion
3161
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
PACKAGE DESIGNATOR ‘UA’
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.164
0.159
4.17
4.04
0.062
45° 0.058
1.57
45° 1.47
0.122
0.117
0.085 1 2 3 0.031
MAX
0.640
0.600
45°
0.0173
0.0138
SEE NOTE
0.0189
0.0142
0.050
BSC
Dwg. MH-014E in
3.10
2.97
2.16 1 2 3 0.79
MAX
16.26
15.24
45°
0.44
0.35
SEE NOTE
0.48
0.36
1.27
BSC
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000

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