MHA18x Series High Performance Low Power Hall-Effect Sensor

By MEMSIC Inc.

High Performance Low Power Hall-Effect Sensor MHA18x Series FEATURES - Low power CMOS process - Wide operation voltage range: 1.65~5.5V - Ultra-low power consumption, <5uA@1.8V - Good RF noise immunity - -40 C to +85 C operation - RoHS compliant APPLICATIONS - TWS headset - Smart meter - Cover switch - Domestic appliances - Laptop - Industry DESCRIPTION Figure 1: Signal Path Devices List Devices: MHA182AS-S, Package: SOT553, Polarity: Single output S unipolar, Output: push pull, ESD-HBM: ±3.5KV, Quantity / Reel: 3000 Devices: MHA183AS, Package: SOT23-3L, Polarity: Single output Omnipolar, Output: push pull, ESD-HBM: ±4.5KV, Quantity / Reel: 3000 SPECIFICATIONS (Measurements @ 25 C, unless otherwise noted; V DD =1.8V unless otherwise specified) Supply Voltage (V DD ): Min 1.65, Typ 1.8, Max 5.5 V Supply Current: Min 2.5, Typ 5.0 μA Supply Current (-40~85 C): Min 2.5, Max 10.0 μA Power Down Current: 1.0 nA Operating Temperature: Min -40, Max 85 C Storage Temperature: Min -55, Max 125 C Awake Tim (T awake ): Min 50, Typ 100 μs Period (T period ): Min 50, Typ 100 ms Duty Cycle: 0.05 % Output High (V OH ) IOUT =+0.5mA: Min VDD -0.3, Typ VDD -0.1, Max VDD +0.1 V Output Low (V OL ) IOUT =-0.5mA: Min -0.3, Typ 0.1, Max 0.3 V Output Current: Min -0.5, Max 0.5 mA Sampling Frequency: 20 Hz Magnetic Opening Point (B OP ): Min 27, Typ 37, Max 47 Gauss Magnetic Releasing Point (B RP ): Min 17, Typ 27, Max 37 Gauss Hysteresis Window (B HYS ): Min 3, Typ 10, Max 17 Gauss SOT23 PIN DESCRIPTION Pin NO. 1, Pin name VDD, Description: Power supply Pin NO. 2, Pin name OUT, Description: S or N pole detection output Pin NO. 3, Pin name GND, Description: Ground SOT553 PIN DESCRIPTION Pin NO. 1, Pin name NC Pin NO. 2, Pin name GND, Description: Ground Pin NO. 3, Pin name NC Pin NO. 4, Pin name VDD, Description: Power supply Pin NO. 5, Pin name OUT, Description: S or N pole detection output THEORY OF OPERATION This Hall switch is fully integrated CMOS IC. It output high-low signal following magnetic field changing. Normally it works with a magnet and detect the magnet close and away. Figure 5: Hall Effect Figure 6: Output signals of OUTN and OUTS pins Figure 7: Output signals Omnipolar OUT pins Figure 8: Sensor and magnet Figure 9: Field by magnet (different size and distance) Magnetic flux density SOLDER REFLOW PROFILE 1. Reflow is limited by 2 times. Second reflow should be applied after device has cooled down to room temperature (25 ℃). 2. Recommended reflow profile for Pb free process is shown in Figure 3. The time duration of peak temperature (260 ℃) should be limited to 10 seconds. 3. Type 4 solder paste is recommended for a better SMT quality. Figure 10: Recommended solder reflow profile MANUAL SOLDERING 1. Soldering/repairing MHA18x manually via solder iron or heater gun is not recommended. 2. Avoid bending or torqueing the PCB after the sensor is assembled. SOT23 PACKAGE OUTLINE DIMENSION Unit: mm 2.926±0.1 1.626±0.1 2.800±0.2 1.900±0.1 Max 1.250 1.100±0.1 0.650 0.150 0.405 0.400 0.59 10° ±2° 12° ±2° 4°Ref 0.170±0.03 Figure 13: Mechanical package outline dimensions Notes ： a) Sensitive area located at the center of package within 0.3mm diameter circle. b) Unless otherwise specified, Tolerances is ±0.05mm. SOT23 PACKAGE TAPE AND REEL PACKING Products are put into carrier tape according to package type. The quantity for each full reel is 3000pcs per reel with 7” lock reel. Please refer to below Figure Details for tape and reel packing as below: a) Tape and reel carriers are in accordance with ANSI/EIA-481 b) Tape and reels are NOT designed to be baked at high temperatures c) Each tape and reel is typically dry packed in a moisture barrier bag (MSL1). Section A-A Section B-B 8.00 1.75 3.50 Lead: 300mm Tail: 500mm R0.50 4.00 3.30 3.20 5.50 Carrier tape Cover tape φ1.55 0.25 3.20 2.55 1.47 5° MAX 5° MAX 0.60 5° MAX 3.30 R0.30 R0.30 User direction of unreeling BBAA Figure 14: Carrier tape dimension and device orientation SOT553 PACKAGE OUTLINE DIMENSION Unit: mm Figure 15: Mechanical package outline dimensions Notes ： c) Sensitive area located at the center of package within 0.3mm diameter circle. d) Unless otherwise specified, Tolerances is ±0.05mm. SOT553 TAPE AND REEL Products are put into carrier tape according to package type. The quantity for each full reel is 3000pcs per reel with 7” lock reel. Please refer to below Figure Details for tape and reel packing as below: a) Tape and reel carriers are in accordance with ANSI/EIA-481 b) Tape and reels are NOT designed to be baked at high temperatures c) Each tape and reel is typically dry packed in a moisture barrier bag (MSL1). Figure 16: Carrier tape dimension and device orientation