AN48800A PANASONIC | Alldatasheet
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Individual Specification AN48800A Low current consumption, high sensitivity CMOS Hall IC One-way magnetic field operation ■ Overview The AN48800A is a Hall IC (a magnetic sensor) which has 2 times or more sensitivity and a low current consumption of about one three- hundredth compared with our conventional one. In this Hall IC, a Hall element, a offset cancel circuit, an amplifier circuit, a sample and hold circuit, a Schmidt circuit, and output stage FET are integrated on a single chip housed in a small package by IC technique. ■ Features High sensitivity ( 6 mT max.) due to offset cancel circuit and a new sample and hold circuit Small current by using intermittent action (10 µA typ.) Small package (SMD) Open drain output ■ Applications Flip type cellular phone, digital video camera ■ Block Diagram 1 VCC 2.5 V to 3.5 V
3 GND
2 Out
Note) The magnetism detection time should be longer than one intermittent action cycle (On = 200 µs and Off = 51 ms). ■ Pin Descriptions Pin No. Symbol Description
1 VCC Power supply
2 Out Output
3 GND Ground
0.11+0.10 −0.05 Seating plane 0 to 0.100.40±0.20 1.10+0.30 −0.10 0.10 to 0.30 1.10+0.20 −0.10 1.50+0.25 −0.05 0.40+0.10 −0.05 (1.45) 0.65±0.15 2.80+0.20 −0.30 1.90±0.20 0.65±0.15 2.90+0.20 −0.05 0.95 0.95 0.10 M0.10 Unit : mm MINI-3DRA (Lead-free package)
■ Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage VCC 5 V Output voltage VOUT 5 V Supply current ICC 5 mA Output current IOUT 30 mA Power dissipation *1, *2 PD 60 mW Operating ambient temperature *1 Topr −20 to +75 °C Storage temperature *1 Tstg −55 to +125 °C Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: Ta = 75°C. For the independent IC without a heat sink. Please use within the range of power dissipation, refering to PD Ta curve. ■ Recommended Operating Range Parameter Symbol Range Unit Supply voltage VCC 2.5 to 3.5 V ■ Electrical Characteristics Ta = 25°C ± 2°C Parameter Symbol Conditions Min Typ Max Unit Operating magnetic flux density 1 *1 BH-L VCC = 3 V 6 mT Operating magnetic flux density 2 *2 BL-H VCC = 3 V 0.5 mT Output voltage VOL VCC = 3 V , IO = 5 mA, B = 6.0 mT 0.1 0.3 V Output current IOH VCC = 3 V , VO = 3 V , B = 0.5 mT 10 µA Supply current 1 *3 ICCA VE VCC = 3 V , B = 0.5 mT 10 15 µA Note) *1: Symbol BH-L stands for the operating magnetic flux density where its output level varies from high to low. *2: Symbol BL-H stands for the operating magnetic flux density where its output level varies from low to high. *3: I CCA VE = {ICCON × tON + ICCOFF × tOFF}/{tON + tOFF} Design reference data Parameter Symbol Conditions Min Typ Max Unit Hysteresis width 1 BW VCC = 3 V 1.2 mT Supply current 2 ICCON VCC = 3 V , B = 0.5 mT 2 mA Supply current 3 ICCOFF VCC = 3 V , B = 0.5 mT 3 µA Operating time tON VCC = 3 V 200 µs Stop time tOFF VCC = 3 V 51 ms Note) It will operate normally in approximately 51 ms after power on.
Individual Specification ■ Technical Data Position of a Hall element (unit in mm) Distance from a package surface to sensor part: 0.39 mm (reference value) A Hall element is placed on the shaded part in the figure. 0.5 0.5 1.2 0.39 0.5 Magneto-electro conversion characteristics S N BW BH-L BL-H Output voltage Direction of applied magnetic field Operating magnetic flux density Applied magnetic flux density B Simple polarity distinction method of mounting magnet to product incorporating Hall IC Plastic coverPlastic bar Magnet for Hall IC Magnet A magnet, which is used in pair with a Hall IC, can be mounted to a product incorporating a built-in Hall IC (e.g., a cellular phone) smoothly and correctly with a simple tool. The polarity of the magnet (hereafter referred to as Hall IC magnet) will be automatically discriminated. This tool is a plastic bar, one end of which is attached with a small magnet (hereafter referred to as plastic bar magnet), as shown in the above illustration. The plastic bar magnet, the polarity of which is known, is secured on the bar with a plastic cover. When the plastic bar magnet is located close to the Hall IC magnet, the Hall IC magnet will be attracted to the plastic bar magnet. The contact side of the Hall IC magnet is different in polarity from that of the plastic bar magnet. As a matter of course, the polarity of the Hall IC magnet will be known then. The Hall IC magnet can be mounted to the appliance in this state. The attraction force of the plastic bar magnet is rather weak due to the plastic cover on it. Therefore, the plastic bar can be separated from the Hall IC magnet with ease after the Hall IC magnet is mounted properly.
■ Technical Data (continued) Main characterisitcs Operating magnetic flux density Supply voltage Operating magnetic flux density Ambient temperature 0.5 1.0 1.5 2.0 2 3 42.5 3.5 4.5 5 AN48800A_Tokusei01 Ta = 25°C Sample 1 BW Sample 2 BW Sample 3 BW Supply voltage VCC (V) Operating magnetic flux density B (mT) −25 0 25 50 75 AN48800A_Tokusei02 VCC = 3.0 V Sample 1 BH-L Sample 2 BH-L Sample 3 BH-L Sample 3 BL-H Sample 1 BL-H Sample 2 BL-H Ambient temperature Ta (°C) Operating magnetic flux density B (mT) Operating magnetic flux density Supply voltage Average consumption current Supply voltage 2 3 42.5 3.5 4.5 5 AN48800A_Tokusei03 Ta = 25°C Sample 2 BH-L Sample 2 BL-H Sample 1 BH-L Sample 1 BL-H Sample 3 BH-L Sample 3 BL-H Supply voltage VCC (V) Operating magnetic flux density B (mT) 0 2 41 3 5 6 AN48800A_Tokusei04 Output = High −50°C 125°C 25°C Supply voltage VCC (V) Average consumption current ICCAVE (µA) Low-level output voltage Supply voltage Low-level output voltage Ambient temperature 0.00 0.05 0.10 0.15 0.20 AN48800A_Tokusei05 IO = 5 mA 75°C 25°C −25°C −50°C 2 41 3 5 6 Supply voltage VCC (V) Low-level output voltage VOL (V) 0.00 0.14 −50 −25 0 25 50 7 5 100 125 AN48800A_Tokusei06 VCC = 3.0 V 0.02 0.04 0.06 0.08 0.10 0.12 Low-level output voltage VOL (V) Ambient temperature Ta (°C)