Individual Specification AN48840B 0.225 Low current consumption, high sensitivity CMOS Hall IC Alternating magnetic field operation (For low-speed rotation detection) 1 0.225 4 2 3 0.65 0.65 1.300.10 2.000.10 0.320.10 0 to 0.10 0.800.10 0.11+0.10 -0.05 The AN48840B is a Hall IC (a magnetic sensor) which has 2 times or more sensitivity and a low current consumption of about one fiftieth 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. 5 Features Unit : mm 0.13 M 1.650.10 2.100.10 Overview 0.22+0.10 -0.05 0.10 1 2 Seating plane 3 High sensitivity (6 mT max.) due to offset cancel circuit and a new sample and hold circuit Small current by using intermittent action 5 4 SMINI-5DA (Lead-free package) (Average supply current: 56 A typ., Sampling period: 670 s typ.) Small package (SMD) CMOS inverter output (logic output form) S Magnetic flux density N Applications Functional operation key, Mouse, AN48840B output level Appliances for low-speed rotation detection L H L Block Diagram VCC N.C. N.C. 4 3 1 CLK On/Off control 5 Out Amplifier Hall element GND Switch Sample hold 2 Pin Descriptions 36 Pin No. Symbol Description Pin No. Symbol 1 N.C. 4 VCC Power supply 2 GND 5 Out Output 3 N.C. Ground Description H AN48840B Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage VCC 5 V Output voltage VOUT 5 V Supply current ICC 5 mA IOUT 15 mA PD 60 mW Topr -25 to +75 C Tstg -55 to +125 C Output current Power dissipation *1, *2 Operating ambient temperature Storage temperature *1 *1 Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: Ta = 75C. 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 Supply voltage Symbol Range Unit VCC 2.5 to 3.5 V Electrical Characteristics Ta = 25C 2C Parameter Symbol Operating magnetic flux density 1 *1 BHL Operating magnetic flux density 2 *2 Conditions Min Typ Max Unit VCC = 3 V, VCC = 2.5 V 0.5 6 mT BLH VCC = 3 V, VCC = 2.5 V -6 - 0.5 mT Output voltage 1 VOL1 VCC = 3 V, IO = 2 mA, B = 6.0 mT 0.1 0.3 V Output voltage 1 VOL2 VCC = 2.5 V, IO = 2 mA, B = 6.0 mT 0.1 0.3 V Output voltage 2 VOH1 VCC = 3 V, IO = -2 mA, B = -6.0 mT 2.7 2.9 V VOH2 VCC = 2.5 V, IO = -2 mA, B = -6.0 mT 2.7 2.9 V Supply current 1 *3 ICCAVE VCC = 3 V 56.0 85.0 A Supply current 2 *3 ICC2AVE VCC = 2.5 V 48.0 72.0 A Output voltage 2 Intermittent action time Tsam VCC = 3 V 490 670 850 S Intermittent action time 2 Tsam2 VCC = 2.5 V 513 710 890 S Note) *1: Symbol BH-LS , BH-LN stands for the operating magnetic flux density where its output level varies from high to low. *2: Symbol BL-HS , BL-HN stands for the operating magnetic flux density where its output level varies from low to high. *3: ICCAVE = {ICCON x tON + ICCOFF x tOFF}/{tON + tOFF} Design reference data Parameter Symbol Conditions Min Typ Max Unit Hysteresis width BW VCC = 3 V 7 mT Supply current 3 ICCON VCC = 3 V 1.4 2.1 mA Supply current 4 ICCOFF VCC = 3 V 2.5 A Supply current 5 ICC2ON VCC = 2.5 V 1.12 1.68 mA Supply current 6 ICC2OFF VCC = 2.5 V 2.2 A tON Ta = -25C to 75C, VCC = 3 V 10 26 42 S Stop time tOFF Ta = -25C to 75C, VCC = 3 V 258 644 1 030 S Operating time 2 t2ON Ta = -25C to 75C, VCC = 2.5 V 11 27 43 S Stop time 2 t2OFF Ta = -25C to 75C, VCC = 2.5 V 270 674 1 078 S Operating time Note) It will operate normally in approximately 0.67 ms after power on. 37 Individual Specification Technical Data Position of a Hall element (unit in mm) Distance from a package surface to sensor part: 0.31 mm (reference value) A Hall element is placed on the shaded part in the figure. 1.0 0.31 1.0 Magneto-electro conversion characteristics S Output voltage BLH BW BHL N Applied magnetic flux density B Operating magnetic flux density Direction of applied magnetic field -Ta Power dissipation AN48840B_P of package DSMINI-5DA Main characterisitcs AN48840B_Tokusei02 Operating magnetic flux density Supply voltage PD Ta 200 6.0 Sample 1 BH-L Operating magnetic flux density B (mT) 175 Power dissipation PD (mW) 150 Independent IC without a heat sink Rth(j-a) = 833.3C/W PD = 120 mW (25C) 125 100 75 4.0 Sample 2 BH-L 2.0 0 -2.0 Sample 1 BL-H Sample 2 BL-H -4.0 50 Ta = 25C -6.0 25 1 2 3 Supply voltage VCC (V) 0 0 25 50 75 100 Ambient temperature Ta (C) 38 125 150 4 5 AN48840B Technical Data (continued) Main characterisitcs (continued) AN48840B_Tokusei03 AN48840B_Tokusei04 Hysteresis width Supply voltage Operating magnetic flux density Ambient temperature 6.0 10.0 Sample 1 BH-L Ta = 25C 9.5 Sample 2 BH-L 9.0 Hesteresis width BW (mT) 4.0 2.0 0 -2.0 Sample 1 BL-H Sample 2 BL-H -4.0 Sample 2 BW 8.0 7.5 Sample 1 BW 7.0 6.5 6.0 5.5 VCC = 3 V -6.0 -50 8.5 -25 0 25 50 75 100 5.0 125 2 1 Ambient temperature Ta (C) 4 3 5 Supply voltage VCC (V) AN48840B_Tokusei05 Supply current Supply voltage AN48840B_Tokusei06 Low-level output voltage Supply voltage 100 0.035 Output = High IO = 2 mA 90 0.03 Low-level output voltage VOL (V) Supply current ICC (A) 80 70 60 -35C 50 25C 40 85C 30 20 25C 0.02 -50C 0.015 0.01 0.005 10 0 125C 0.025 1 2 3 0.00 5 4 1 2 3 Supply voltage VCC (V) 5 6 Supply voltage VCC (V) AN48840B_Tokusei07 AN48840B_Tokusei08 high-level output voltage Supply voltage Sampling period Supply voltage 0.06 1 000 IO = -2 mA 0.055 VCC = 3 V 900 0.05 0.045 125C 0.04 Sampling period TS (ms) hgh-level output voltage VOH (V) 4 0.035 25C 0.03 0.025 -50C 0.02 800 85C 700 25C 600 -35C 500 0.015 0.01 400 0.005 0 1 2 3 4 Supply voltage VCC (V) 5 6 300 1 2 3 4 5 Supply voltage VCC (V) 39