AX8104 MicroPower, Ultra-sensitive Hall Effect Switch
GENERAL DESCRIPTION AX8104 is a three-terminal Hall Effect sensor device with an output driver, mainly designed for battery–operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). For AX8104, either north or South Pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (low), the output is latched until B is lower than release point (Brp), then turned off. FEATURES Micro Power Operation for Battery Applications 2.4V to 5.5V battery operation Chopper Stabilized Technology Operation with North or South Pole High sensitivity and high stability of the magnetic switching points 3-pin TSOT-23 package
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BLOCK DIAGRAM
VDD Awake/Sleep Timing Control
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VOUT
N-MOS
Hall Plate
Offset Cancellation
+
Latch
GND
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Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.0 Mar.22, 2011
AX8104
PIN ASSIGNMET The package of AX8104 is TSOT-23-3L; the pin assignment is given by:
GND
2 2
Name Pin VDD 1 Power Input
Description
AX8104
1
3
VDD
VOUT
GND 2 Ground B>Bops or B
Brpn, Output is High.
(TOP VIEW)
ORDER/MARKING INFORMATION Order Information Top Marking
AX8104 XX X
Packing Package Type RT: TSOT-23-3L Blank : Tube A : Taping
H4 Y W X
ID code: internal
ABSSOLUTE MAXIMUM Ûm RATINGS (at TA=25 ºC) VDD Pin Voltage Output Pin Voltage Output Current Junction Temperature Operating Temperature Range Power Dissipation[PD=( TJ-TA ) / θJA ] Thermal Resistance from Junction to case Thermal Resistance from Junction to ambient Characteristics h.co
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WW : 01~26(A~Z) 27~52(a~z) Year : A = 2010 1 = 2011
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Symbol VDD VOUT IOUT TST TJ TOP PD θJC θJA
Rating - 0.3 to 6V - 0.3 to 6V 2 -65 to +150 +125 -40 to +85 400 180 250
Unit V V mA ºC ºC ºC mW ºC/W ºC/W
Storage Temperature Range
Note: θJA is measured with the PCB copper area of approximately 1 in2(Multi-layer).
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Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.0 Mar.22, 2011
AX8104
ELECTRICAL CHARACTERISTICS (VDD = 2.75V, TA=25°C, unless otherwise specified) Characteristics Supply Voltage Supply Current Output Saturation Voltage Output Leakage Current Output Wake-Up Time Period Duty Cycle Symbol VDD IDD VOSAT Awake state Sleep state Average IOUT=1mA Conditions Min 2.4 Typ 2 7 9 0.1 0.01 70 70 0.1 Max Units 5.5 4 12 16 0.3 1 120 120 V mA uA uA V uA us ms %
IO-LEAK VOUT=5.5V, B