ALLEGRO 3260 User Manual
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Data Sheet
27631.50
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT BIPOLAR SWITCH
Suffix Code 'LH' Pinning
3
X
NC
12
SUPPLY
Dwg. PH-003-5
Pinning is shown viewed from branded side.
GROUND
NO (INTERNAL)
CONNECTION
ADVANCE INFORMATION
(subject to change without notice)
June 30, 2000
The A3260-- Hall-effect bipolar switch is an extremely
temperature-stable and stress-resistant sensor especially suited for
operation over extended temperature ranges to +150°C. Superior
high-temperature performance is made possible through dynamic
offset cancellation, which reduces the residual offset voltage normally
caused by device overmolding, temperature dependencies, and thermal
stress.
The 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. A south
pole of sufficient strength will turn the output OFF. 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.
The first character of the part number suffix determines the device
operating temperature range; suffix ‘E–’ is -40°C to +85°C and ‘L–’ is
-40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LH’ is a miniature lowprofile surface-mount package, ‘–LT’ is a miniature SOT-89/TO243AA transistor package for surface-mount applications; while suffix
‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting.
ABSOLUTE MAXIMUM RATINGS
at TA=+25°C
Supply Voltage, VCC........................... 27 V
Reverse Battery Voltage, V
Magnetic Flux Density, B ........... Unlimited
Package Power Dissipation, PD. See Graph
Junction Temperature, TJ............... +170°C
Operating Temperature Range, T
Suffix ‘E–’ .................. -40°C to +85°C
Suffix ‘L–’ ................ -40°C to +150°C
Storage Temperature Range,
TS.............................. -65°C to +170°C
.......... -16 V
RCC
A
FEATURES
■ Internal Current Regulator for 2-Wire Operation
■ Output Slew Rate Controlled
■ Resistant to Physical Stress
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Reverse Battery Protection
■ Solid-State Reliability
■ Small Size
Always order by complete part number: the prefix 'A' + the basic four-digit
part number + a suffix to indicate operating temperature range +
a suffix to indicate package style, e.g., A3260ELH .
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
REG.
X
DYNAMIC
OFFSET CANCELLATION
Suffix Code 'UA' Pinning
(SIP)
X
TO ALL
SUBCIRCUITS
& HOLD
SAMPLE
GROUND
FILTER
LOW-PASS
Dwg. FH-020-4
Suffix Code 'LT' Pinning
(SOT-89/TO-243AA)
X
NC
1
SUPPLY
Dwg. PH-003-7A
32
GROUND
GROUND
1
SUPPLY
Dwg. PH-003-6
32
GROUND
NO (INTERNAL)
CONNECTION
Pinning is shown viewed from branded side.
2
115 Northeast Cutoff, Box 15036
W
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, Allegro MicroSystems, Inc.
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage V
Output Current I
GND(L)
I
GND(H)
Chopping Frequency f
CC
C
Operating 3.5 12 24 V
B > B
B < B
OP
RP
-4.0 -6.5 -8.0 mA
-11 -14.5 -18 mA
– 340 – kHz
Output Slew Rate di/dt CL = 20 pF 0.5 — 2.0 mA/µs
Output Settling Time t
Reverse Battery Current I
NOTES:1. . BOP = operate point (output turns OFF); BRP = release point (output turns ON).
2. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
sd
CC
CL = 20 pF — — 20 µs
V
= -16 V – – -15 mA
RCC
MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Operate Point B
Release Point B
Hysteresis B
OP
RP
hys
BOP - B
RP
–1030 G
-30 -10 – G
–20– G
NOTE — Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
www.allegromicro.com
3
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
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4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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