A3290KUA-T Allegro Microsystems Inc, A3290KUA-T Datasheet

IC HALL EFFECT LATCH 3-SIP

A3290KUA-T

Manufacturer Part Number
A3290KUA-T
Description
IC HALL EFFECT LATCH 3-SIP
Manufacturer
Allegro Microsystems Inc
Type
Bipolar Latchr
Datasheets

Specifications of A3290KUA-T

Package / Case
3-SIP
Sensing Range
50G Trip, -50G Release
Voltage - Supply
4.2 V ~ 24 V
Current - Supply
8mA
Current - Output (max)
25mA
Output Type
Digital, Open Drain
Features
Regulated Voltage
Operating Temperature
-40°C ~ 125°C
Hall Effect Type
Latch
Output Current
25mA
Sensor Case Style
SIP
No. Of Pins
3
Supply Voltage Range
4.2V To 24V
Operating Temperature Range
-40°C To +125°C
Bandwidth
800kHz
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features and Benefits
▪ Symmetrical switchpoints
▪ Resistant to physical stress
▪ Superior temperature stability
▪ Output short-circuit protection
▪ Operation from unregulated supply
▪ Reverse battery protection
▪ Solid-state reliability
▪ Small package size
Packages:
A3290-DS, Rev. 7
3-pin SOT23W (suffix LH)
Not to scale
VCC
Chopper Stabilized, Precision Hall Effect Latches for
3-pin SIP (suffix UA)
Amp
Functional Block Diagram
Consumer and Industrial Applications
Low-Pass
Filter
Description
The A3290 and A3291 Hall effect latches are extremely
temperature-stable and stress-resistant sensor ICs, especially
suited for operation over extended temperature ranges (up
to 125°C). Superior high-temperature performance is made
possible through Dynamic Offset Cancellation, which reduces
the residual offset voltage normally caused by device package
overmolding, temperature dependencies, and thermal stress. The
two devices are identical except for their magnetic switchpoints.
They are not intended for automotive applications.
Both devices include, on a single silicon chip, a voltage regulator,
a Hall-voltage generator, a small-signal amplifier, chopper
stabilization, a Schmitt trigger, and a short-circuit protected
open-drain output to sink up to 25 mA. A south polarity magnetic
field of sufficient strength is required to turn the output on. A
north polarity field of sufficient strength is necessary to turn
the output off. An onboard regulator permits operation with
supply voltages in the range of 4.2 to 24 V.
Two package styles provide a magnetically optimized package
for most applications. Type LH is a miniature SOT23W low-
profile surface-mount package, and type UA is a three-pin
ultramini SIP for through-hole mounting. Both packages are
lead (Pb) free with 100% matte tin leadframe plating.
Regulator
Current Limit
Control
A3290 and A3291
1
OUT
GND

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A3290KUA-T Summary of contents

Page 1

Chopper Stabilized, Precision Hall Effect Latches for Features and Benefits ▪ Symmetrical switchpoints ▪ Resistant to physical stress ▪ Superior temperature stability ▪ Output short-circuit protection ▪ Operation from unregulated supply ▪ Reverse battery protection ▪ Solid-state reliability ▪ Small ...

Page 2

... A3291 Selection Guide 1 Part Number Packing A3290KLHLT-T 3000 pieces per 7-in. reel A3290KUA-T 500 pieces per bulk bag A3291KLHLT-T 3000 pieces per 7-in. reel A3291KUA-T 500 pieces per bulk bag * Algebraic convention used: (+) south polarity, (–) north polarity. Absolute Maximum Ratings ...

Page 3

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 ELECTRICAL CHARACTERISTICS over operating temperature range, unless otherwise noted Characteristic Symbol Supply Voltage Range 2 Output Leakage Current Output Saturation Voltage V Output Current Limit Power-On Time Chopping Frequency Output Rise ...

Page 4

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional thermal information available on Allegro website. for Consumer and Industrial Applications Symbol Test Conditions* Package ...

Page 5

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 Chopper-Stabilized Technique The Hall element can be considered as a resistor array similar to a Wheatstone bridge. A basic circuit is shown in figure 1, demonstrating the effect of the magnetic ...

Page 6

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 Note that these devices latch; that is, after a south (+) polarity magnetic field of sufficient strength impinging on the branded face of the device turns on the device, the device ...

Page 7

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, ...

Page 8

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 45° +0.08 3.02 –0.05 1.02 MAX 0.51 REF 1 14.99 ±0.25 +0.05 0.43 –0.07 Please note that there are changes to the existing UA package drawing pending. Please contact the Allegro ...

Page 9

Chopper Stabilized, Precision Hall Effect Latches A3290 and A3291 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2005-2010, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, ...

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