A3212EUA Datasheet PDF - Allegro MicroSystems
Part Number | A3212EUA | |
Description | MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH | |
Manufacturers | Allegro MicroSystems | |
Logo | ||
There is a preview and A3212EUA download ( pdf file ) link at the bottom of this page. Total 12 Pages |
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Package Suffix ‘LH’ Pinning
(SOT23W)
3
V
DD
1
2
Dwg. PH-016-1
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD .............................. 5 V
Magnetic Flux Density, B .......... Unlimited
Output Off Voltage, VOUT ...................... 5 V
Output Current, IOUT ........................... 1 mA
Junction Temperature, TJ ................ +170°C
Operating Temperature, TA
Range 'E-' .................... -40°C to +85°C
Range 'L-' .................. -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
Caution: These CMOS devices have input
static protection (Class 3) but are still sus-
ceptible to damage if exposed to extremely
high static electrical charges.
MICROPOWER, ULTRA-SENSITIVE
HALL-EFFECT SWITCH
The A3212 integrated circuit is an ultra-sensitive, pole independent Hall-
effect switch with a latched digital output. This sensor is especially suited for
operation in battery-operated, hand-held equipment such as cellular and cordless
telephones, pagers, and palmtop computers. A 2.5 volt to 3.5 volt operation and a
unique clocking scheme reduce the average operating power requirements to less
than 15 µW with a 2.75 volt supply.
Unlike other Hall-effect switches, either a north or south pole of sufficient
strength will turn the output on; in the absence of a magnetic field, the output
is off. The polarity independence and minimal power requirement allow these
devices to easily replace reed switches for superior reliability and ease of manu-
facturing, while eliminating the requirement for signal conditioning.
Improved stability is made possible through chopper stabilization (dynamic
offset cancellation), which reduces the residual offset voltage normally caused
by device overmolding, temperature dependencies, and thermal stress.
This device includes on a single silicon chip a Hall-voltage generator,
small-signal amplifier, chopper stabilization, a latch, and a MOSFET output.
Advanced BiCMOS processing is used to take advantage of low-voltage and
low-power requirements, component matching, very low input-offset errors, and
small component geometries.
Three package styles provide a magnetically optimized package for most ap-
plications. Package suffixes 'EH' and ‘LH’ are for miniature low-profile (lead-
less and leaded, respectively) surface-mount packages while suffix ‘UA’ is for
a three-lead SIP for through-hole mounting. Each package is available in a lead
(Pb) free version (suffix, –T) with 100% matte tin plated leadframe.
FEATURES
■ Micropower Operation
■ Operation with North or South Pole
■ 2.5 V to 3.5 V Battery Operation
■ Chopper Stabilized
Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress
■ ESD Protected to 5 kV
■ Solid-State Reliability
■ Small Size
■ Easily Manufacturable with Magnet Pole Independence
|
|
3212
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCH
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
60 60
40 BOPS
BRPS
20
40 BOPS
BRPS
20
0
VDD = 2.75 V
0
TA = 25°C
-20
-40
-60
-50
-25
BRPN
BOPN
0 25 50 75 100
AMBIENT TEMPERATURE IN °C
125 150
Dwg. GH-027-3
-20
-40
-60
2.4
BRPN
BOPN
2.6 2.8 3.0 3.2
SUPPLY VOLTAGE IN VOLTS
3.4 3.6
Dwg. GH-057-2
SUPPLY CURRENT
7.0 7.0
6.0
5.0 VDD =2.75 V
VDD =3.5 V
VDD =2.5 V
4.0
6.0
5.0
4.0
TA = 25°C
3.0
-50
-25
0 25 50 75 100
AMBIENT TEMPERATURE IN °C
125 150
Dwg. GH-028-11
www.allegromicro.com
3.0
2.4
2.6 2.8 3.0 3.2
SUPPLY VOLTAGE IN VOLTS
3.4 3.6
Dwg. GH-058-7
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A3212EUA electronic component. |
Information | Total 12 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ A3212EUA.PDF Datasheet ] |
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Featured Datasheets
Part Number | Description | MFRS |
A3212EUA | The function is MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH. Allegro MicroSystems | |
A3212EUA-T | The function is MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH. Allegro MicroSystems | |
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