Diodes AH1883 User Manual
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Description
The AH1883 micropower Omnipolar Hall Effect switch IC is
designed for portable and battery powered equipment such
as cellular phones, cordless phones, camcorders, PDA’s, and
portable PC’s. Based on two high sensitivity Hall Effect plat es
and chopper stabilized architecture, the AH1883 provides
reliable solution over the whole operating range.
To support portable and battery powered equipment the
design has been optimized to operate from 1.65V to 3.3V and
consumes 13uW typical with a supply of 1.8V. To minimize
PCB space the AH1883 incudes a push-pull output structure,
therefore does not require an external pull up resistor, and is
packaged in small low profile SOT553 and U-DFN2020-3
packages.
Either North or South pole of sufficient strength will turn the
output on. When the magnetic flux density (B) is larger than
operate (Bop) the output is switched on. The output is turned
off when B becomes lower than the release point (Brp). The
output will remain off when there is no magnetic field.
Pin Assignments
NC
GND
NC
(Top View)
1
2
3
1. Vdd
SOT553
(Top View)
3. GND
2. OUT PU T
U-DFN2020-3
5
4
OUTPUT
Vdd
Features
• Micropower operation
• Operation with North or South Pole
• 1.65V to 3.3V battery operation
• Chopper stabilized
o Superior temperature stability
o Extremely Low Switch-Point Drift
o Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• ESD (HBM) ＞ 6kV in SOT553 and U-DFN2020-3
• Small low profile packages: SOT553 and U-DFN2020-3
• “Green” Molding Compound
Applications
• Cellular phone
• PDA
• Portable PCs – Netbook, Notebook, Tablets
• Camcorders
• Cordless phone
• Handheld game consoles
• Proximity detection and contact-less switch
applications
AH1883
Document number: DS31296 Rev. 6 - 2
1 of 10
www.diodes.com
September 2011
© Diodes Incorporated
Typical Application Circuit
AH1883
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Vdd
AH1883
Output
GND
Pin Descriptions
Pin Name P/I/O Pin # Description
NC 1 No Connection
GND P/I 2 Ground
NC 3 No Connection
Vdd P/I 4 Power Supply Voltage
Output O 5 Output Pin ( active Low )
Functional Block Diagram
Vdd
Hall
Plate
Hall
Plate
AH1883
Document number: DS31296 Rev. 6 - 2
Sleep/Awake Logic
Cancellation
Offset
Amp
Cancellation
Offset
Amp
and Power Switch
Latch
Latch
Output
Driver
Controller
Output
GND
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September 2011
© Diodes Incorporated
AH1883
Absolute Maximum Ratings (T
Symbol Characteristics Values Unit
Vdd Supply voltage 5 V
B Magnetic flux density Unlimited
TS
PD
TJ
Notes: 1. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability
may be affected by exposure to absolute maximum rating conditions for extended periods of time
Storage Temperature Range -65 to +150 °C
Package Power Dissipation 230 mW
Maximum Junction Temperature 150 °C
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
= 25°C, Note 1)
A
Recommended Operating Conditions (T
= 25°C)
A
Symbol Parameter Conditions Rating Unit
Vdd Supply Voltage Operating 1.65 to 3.3 V
TA
Operating Temperature Range Operating -40 to +85 °C
Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified)
Symbol Characteristic Conditions Min Typ. Max Unit
VOH
VOL
Idd(en)
Idd(dis) Chip disable - 5 8 uA
Idd(avg) average supply current - 7 12 uA
Tawake Awake Time - 50 100 µs
Tperiod Period - 50 100 ms
D.C. Duty Cycle - 0.1 - %
Output On Voltage (High side)
Output On Voltage (Low side)
Supply Current
IO= -0.5mA
IO= 0.5mA
Chip enable - 2 4 mA
Vdd-0.2 - - V
- - 0.2 V
AH1883
Document number: DS31296 Rev. 6 - 2
3 of 10
www.diodes.com
September 2011
© Diodes Incorporated
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