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Bipolar Switch. A3230 Datasheet

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Bipolar Switch. A3230 Datasheet






A3230 Switch. Datasheet pdf. Equivalent




A3230 Switch. Datasheet pdf. Equivalent





Part

A3230

Description

Chopper-Stabilized Hall-Effect Bipolar Switch



Feature


A3230 Chopper-Stabilized Hall-Effect Bip olar Switch Features and Benefits ▪ C hopper stabilization ▫ Superior tempe rature stability ▫ Extremely low swit chpoint drift ▫ Insensitive to physic al stress ▪ Reverse battery protectio n ▪ Output short circuit protection Solid state reliability ▪ Small si ze ▪ Robust EMC capability ▪ High E SD ratings (HBM) Description The A323.
Manufacture

Allegro MicroSystems

Datasheet
Download A3230 Datasheet


Allegro MicroSystems A3230

A3230; 0 Hall-effect sensor is a temperature st able, stressresistant bipolar switch. T his sensor is the most sensitive Hall-e ffect device in the Allegro® bipolar s witch family and is intended for ring-m agnet sensing. Superior high-temperatur e performance is made possible through an Allegro patented dynamic offset canc ellation that utilizes chopper-stabiliz ation. This method .


Allegro MicroSystems A3230

reduces the offset voltage normally caus ed by device overmolding, temperature d ependencies, and thermal stress. The A3 230 includes the following on a single silicon chip: a voltage regulator, Hall -voltage generator, small-signal amplif ier, chopper stabilization, Schmitt tri gger, and a short circuit protected ope n-drain output. Advanced BiCMOS wafer f abrication process.


Allegro MicroSystems A3230

ing takes advantage of low-voltage requi rements, component matching, very low i nput-offset errors, and small component geometries. Packages: 3 pin SOT23W (s uffix LH), and 3 pin SIP (suffix UA) T he A3230 Hall-effect bipolar switch tur ns on in a south polarity magnetic fiel d of sufficient strength and switches o ff in a north polarity magnetic field o f sufficient stren.

Part

A3230

Description

Chopper-Stabilized Hall-Effect Bipolar Switch



Feature


A3230 Chopper-Stabilized Hall-Effect Bip olar Switch Features and Benefits ▪ C hopper stabilization ▫ Superior tempe rature stability ▫ Extremely low swit chpoint drift ▫ Insensitive to physic al stress ▪ Reverse battery protectio n ▪ Output short circuit protection Solid state reliability ▪ Small si ze ▪ Robust EMC capability ▪ High E SD ratings (HBM) Description The A323.
Manufacture

Allegro MicroSystems

Datasheet
Download A3230 Datasheet




 A3230
A3230
Chopper-Stabilized Hall-Effect Bipolar Switch
Features and Benefits
Chopper stabilization
Superior temperature stability
Extremely low switchpoint drift
Insensitive to physical stress
Reverse battery protection
Output short circuit protection
Solid state reliability
Small size
Robust EMC capability
High ESD ratings (HBM)
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Description
The A3230 Hall-effect sensor IC is a temperature stable,
stress-resistant bipolar switch. This device is the most sensitive
Hall-effect device in the Allegrobipolar switch family and is
intended for ring-magnet sensing. Superior high-temperature
performance is made possible through an Allegro
dynamic offset cancellation that utilizes chopper-stabilization.
This method reduces the offset voltage normally caused by
device overmolding, temperature dependencies, and thermal
stress.
The A3230 includes the following on a single silicon chip:
a voltage regulator, Hall-voltage generator, small-signal
amplifier, chopper stabilization, Schmitt trigger, and a short
circuit protected open-drain output. Advanced BiCMOS
wafer fabrication processing takes advantage of low-voltage
requirements, component matching, very low input-offset
errors, and small component geometries.
The A3230 Hall-effect bipolar switch turns on in a south
polarity magnetic field of sufficient strength and switches
off in a north polarity magnetic field of sufficient strength.
Because the output state is not defined if the magnetic field is
Not to scale
Continued on the next page…
Functional Block Diagram
VCC
Amp
Regulator
To All Subcircuits
Control
Current Limit
VOUT
<1Ω
3230-DS, Rev. 9
GND




 A3230
A3230
Chopper-Stabilized Hall Effect Bipolar Switch
Description (continued)
diminished or removed, to ensure that the device switches, Allegro
recommends using magnets of both polarities and of sufficient
strength in the application.
TheA3230 is rated for operation between the ambient temperatures
–40°C and 85°C for the E temperature range, and –40°C to 150°C
for the L temperature range. Two A3230 package styles provide
magnetically optimized solutions for most applications. Package
LH is a SOT23-W, a miniature low-profile surface-mount
package, while package UA is a three-lead ultramini SIP for
through-hole mounting. Each package is available in a lead (Pb)
free version, with 100% matte tin plated leadframes.
Selection Guide
Part Number
Packing1
Mounting
Ambient, TA BRP(MIN) BOP(MAX)
(°C) (G) (G)
A3230LLHLT-T2 7-in. reel, 3000 pieces/reel
A3230LUA-T2 Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SIP through hole
–40 to 150
–25
25
1Contact Allegro for additional packing options.
2Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently
restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence in the near future is
probable. Samples are no longer available. Status date change January 30, 2012.
Absolute Maximum Ratings
Characteristic
Supply Voltage
Reverse Supply Voltage
Output Off Voltage
Output Current
Reverse-Output Current
Magnetic Flux Density
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
VCC
VRCC
VOUT
IOUTSINK
IROUT
B
TA
TJ(max)
Tstg
Range E
Range L
Notes
Rating
28
–18
26.5
Internally Limited
–10
Unlimited
–40 to 85
–40 to 150
165
–65 to 170
Units
V
V
V
mA
G
ºC
ºC
ºC
ºC
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2




 A3230
A3230
Chopper-Stabilized Hall Effect Bipolar Switch
OPERATING CHARACTERISTICS valid over full operating voltage and ambient temperature ranges, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Units
Electrical Characteristics
Supply Voltage1
Output Leakage Current
Output On Voltage
Output Current Limit
Power-On Time
Chopping Frequency
Output Rise Time2
Output Fall Time2
Supply Current
Reverse Battery Current
Supply Zener Clamp Voltage
Supply Zener Current3
Magnetic Characteristics4
VCC
IOUTOFF
VOUT(SAT)
IOM
tPO
fc
tr
tf
ICCON
ICCOFF
IRCC
VZ
IZ
Operating, TJ < 165°C
VOUT = 24 V, B < BRP
IOUT = 20 mA, B > BOP
B > BOP
VCC > 3.6 V
RLOAD = 820 Ω, CS = 20 pF
RLOAD = 820 Ω, CS = 20 pF
B > BOP
B < BRP
VRCC = –18 V
ICC = 6.5 mA; TA = 25°C
VS = 28 V
3.6 – 24 V
– – 10 μA
– 250 500 mV
30 – 60 mA
– 8 50 μs
– 200 – kHz
– 0.2 1
μs
– 0.2 1
μs
– 1.6 3.5 mA
– 1.6 3.5 mA
– – –2 mA
28 – – V
– – 6.5 mA
Operate Point
BOP South pole adjacent to branded face of device
–10 7.5
25
G
Release Point
BRP North pole adjacent to branded face of device
–25 –7.5 10
G
Hysteresis
BHYS
BOP – BRP
5 15 25 G
1 Maximum voltage must be adjusted for power dissipation and junction temperature, see Power Derating section.
2 CS = oscilloscope probe capacitance.
3 Maximum current limit is equal to the maximum ICC(MAX) + 3 mA.
4 Magnetic ux density, B, is indicated as a negative value for north-polarity magnetic elds, and as a positive value for south-polarity magnetic elds.
This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the eld is indicated
by the absolute value of B, and the sign indicates the polarity of the eld (for example, a –100 G eld and a 100 G eld have equivalent strength, but
opposite polarity).
DEVICE QUALIFICATION PROGRAM
Contact Allegro for information.
EMC (Electromagnetic Compatibility) REQUIREMENTS
Contact Allegro for information.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3






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