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Diodes Semiconductor Electronic Components Datasheet

AH1892 Datasheet

PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH

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AH1892 pdf
AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
Description
The AH1892 is a micropower magnetic range selectable (Bop/Brp)
Omnipolar Hall effect switch IC with internal pull up and pull down
capability, designed for consumer equipment ranging from portable
and battery powered cellular phones and portable PCs to home
appliances and industrial applications. To support battery powered
equipment and low voltage microcontrollers, the AH1892 can operate
over the supply range of 1.6V to 3.6V and uses a hibernating clocking
system to minimize the power consumption. The average supply
current is only 4.3µA typical at 1.80V. Due to the application diversity,
the AH1892 has an 8kV ESD rating on the supply and output pins. To
minimize PCB space the AH1892 is packaged in the small CSP
package (0.71mm x 0.71mm) or SOT553 leaded package
Pin Assignments
U-WLB0707-4
The output is activated with either a north or south pole of sufficient
magnetic field strength. The user can select one of two magnetic
sensitivity bands via the BSEL pin without the addition of any external
components allowing a flexible but small solution. The band select
can be hardwired or be changed on the fly via a logic source such as
a micro-controller. When the magnetic flux density (B) is larger than
operate point (Bop), the output will be turned on (pulled low) and held
until B is lower than release point (Brp).
Features
• Omnipolar operation (North or South pole)
• Programmable operate and release points
• Supply voltage of 1.6V to 3.6V
• Micropower operation
• Chopper stabilized design
ƒ Superior temperature stability
ƒ Extremely Low Switch-Point Drift
ƒ Insensitive to Physical Stress
• No external pull up resistors required
• Good RF noise immunity
• -40°C to +85°C operating temperature
• 8kV ESD on supply and output pins
• Miniature U-WLB07070-4 (CSP 0.71mm x 0.71mm typical) and
small low profile SOT553
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
www.DataSheet.co.kr
SOT553
Applications
• Open and close detect for gaming and cellular phones
• Holster and dock detect for cellular phones
• Cover switch in portable and tablet PCs
• Digital still and video cameras
• Tray, door and covers position detect for printers and scanners
• Contact-less switch in consumer and industrial products
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
AH1892
Document number: DS35092 Rev. 1 - 2
1 of 11
www.diodes.com
May 2012
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/



Diodes Semiconductor Electronic Components Datasheet

AH1892 Datasheet

PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH

No Preview Available !

AH1892 pdf
Typical Application Circuit
AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
Note : CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical
Pin Descriptions
Package: U-WLB0707-4
Pin #
A1
A2
B1
B2
Pin Name
GND
OUTPUT
BSEL
VDD
Description
Ground
Output
Band Select
Power Supply Voltage
Package: SOT553
www.DataSheet.co.kr
Pin #
Pin Name
Description
1
2
3
4
5
Notes:
VDD Power Supply Voltage
NC No Connection (Note 4)
BSEL
Band Select
GND
Ground
OUTPUT Output
4. NC is “No Connection” pin and is not connected internally. This pin can be left open or connected to ground.
Functional Block Diagram
AH1892
Document number: DS35092 Rev. 1 - 2
2 of 11
www.diodes.com
May 2012
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/



Diodes Semiconductor Electronic Components Datasheet

AH1892 Datasheet

PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH

No Preview Available !

AH1892 pdf
AH1892
PROGRAMMABLE MICROPOWER OMNIPOLAR
HALL-EFFECT SENSOR SWITCH
Absolute Maximum Ratings (TA = +25°C, Note 5)
Symbol
VDD
Supply Voltage (Note 6)
Characteristics
Values
6
Unit
V
VDD REV
Reverse Supply Voltage
-0.3 V
IOUTPUT
Output current (source and sink)
2.5 mA
B Magnetic Flux Density
Unlimited
Ts Storage Temperature Range
-65 to +150
°C
PD Package Power Dissipation
U-WLB0707-4
SOT553
160 mW
230 mW
TJ Maximum Junction Temperature
150 °C
ESD
Human Body Model ESD
VDD, GND and OUT pins
BSEL pin
8 kV
6 kV
Notes:
5. 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
6. The absolute maximum VDD of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions
Symbol
VDD
TA
Characteristics
Supply Voltage
Operating Temperature Range
Conditions
www.DataSheet.co.kr
Operating
Operating
Rating
1.6 to 3.6
-40 to +85
Unit
V
°C
Electrical Characteristics (TA = +25°C, VDD = 1.8V, unless otherwise specified.)
Symbol
Characteristics
Conditions
Min Typ
VOL Output low voltage (on)
IOUT = 1mA
0.1
VOH Output high voltage (off)
IOUT = -1mA
VDD -0.2 VDD -0.1
BLsel
Band select low band
0
BHsel
Band select high band
1.4
RU_BSEL BSEL pin internal pull-up resistor
(Note 7)
50
IDD(awake)
IDD(sleep)
Supply current
During ‘awake’ period
During ‘sleep’ period
2.1
2.5
IDD(avg)
IDD(avg)
Average cupply current
VDD = 1.8V
VDD = 3.6V
4.3
7.2
Tawake Awake active pulse width
(Note 8)
50
Tperiod
Awake period
(Note 8)
50
D.C.
Duty cycle
0.1
TBand
Band transition time
( Note 9)
100.0
Notes:
7. BSEL pin internal pull-up resistor is only active during AWAKE time.
8. When power is initially on, the operating VDD (1.6V to 3.6V) must be applied to guarantee the output sampling.
The output state is valid after the second operating phase (typical 100ms).
9. Transition time varies dependant on the timing of BSEL activation during the sleep and awake phases.
Max
0.2
0.5
3.6
8.0
13.0
100
100
200.1
Unit
V
V
V
V
k
mA
µA
µA
µA
µs
ms
%
ms
AH1892
Document number: DS35092 Rev. 1 - 2
3 of 11
www.diodes.com
May 2012
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/




Part Number AH1892
Description PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Maker Diodes
Total Page 11 Pages
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