
The A3240-- Hall-effect 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, tempera-
ture 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 short-circuit protected open-collector output to
sink up to 25 mA. A south pole of sufficient strength will turn the
output ON. An on-board regulator permits operation with supply
voltages of 4.2 to 24 volts.
The first character of the part number suffix determines the device
operating temperature range; suffix ‘E–’ is for -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 modified
SOT-23 surface-mount package, ‘–LT’ is a miniature SOT-89/TO-
243AA transistor package for surface-mount applications; while suffix
‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting.
D
2
FEATURES
I
Resistant to Physical Stress
I
Superior Temperature Stability
I
Output Short-Circuit Protection
I
Operation From Unregulated Supply
I
Reverse Battery Protection
I
Solid-State Reliability
I
Small Size
Suffix ‘–LT’ & ‘–UA’ Pinning
Pinning is shown viewed from branded side.
CHOPPER-STABILIZED, PRECISION
HALL-EFFECT SWITCH
3240
Supply Voltage, V
CC
........................
26.5 V
Reverse Battery Voltage, V
RCC
..........
-30 V
Magnetic Flux Density, B ...........
Unlimited
Output OFF Voltage, V
OUT
.................
26 V
Continuous Output Current,
I
OUT
.......................
Internally Limited
Reverse Output Current, I
OUT
........
-50 mA
Package Power Dissipation, P
D
.
See Graph
Junction Temperature, T
J
...............
+170
°
C
Operating Temperature Range, T
A
Suffix ‘E–’..................
-40
°
C to +85
°
C
Suffix ‘L–’................
-40
°
C to +150
°
C
Storage Temperature Range,
T
S
..............................
-65
°
C to +170
°
C
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
°
C
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.,
A3240ELH .
Dwg. PH-003-2
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V
CC
G
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PTCT