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零件编号 | A3212ELHLT | ||
描述 | MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH | ||
制造商 | Allegro MicroSystems | ||
LOGO | |||
1 Page
A3212
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
A3212
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCH
SENSOR LOCATIONS
Package Designator 'EH'
ACTIVE AREA DEPTH
0.013"
0.34 mm
NOM
0.035"
0.88 mm
654
0.062"
1.56 mm
BRANDED
SURFACE
A
1
2
3
Dwg. MH-030
Package Designator 'LH'
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
0.056"
1.42 mm
3
0.033"
0.84 mm
A
1
2
Dwg. MH-025-2
Package Designator 'UA'
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.078"
1.98 mm
0.052"
1.32 mm
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-13
115 Northeast Cutoff, Box 15036
8 Worcester, Massachusetts 01615-0036 (508) 853-5000
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页数 | 12 页 | ||
下载 | [ A3212ELHLT.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
A3212ELHLT | MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH | Allegro MicroSystems |
A3212ELHLT-T | MICROPOWER/ ULTRA-SENSITIVE HALL-EF FECT SWITCH | Allegro MicroSystems |
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