AN48841B - Panasonic - Datasheet.Directory

Publication date: March 2009 SPC00018BEB 1

AN48840B

Low current consumption, high sensitivity CMOS Hall IC

Alternating magnetic ﬁeld operation

(For low-speed rotation detection)

 Overview

The AN48840B is a Hall ICs (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.

 Features

 High sensitivity due to offset cancel circuit and a new sample and

hold circuit

 Small current by using intermittent action

(Average supply current: 56 μA typ., Sampling period: 670 μs typ.)

 Small package (SMD)

 CMOS inverter output (logic output form)

 Applications

 Functional operation key, Mouse,

Appliances for low-speed rotation detection

 Block Diagram

CLK

GND

5Out

VCC

3 1

N.C. N.C.

On/Off control

Hall

element Switch

Amplifier

Sample

hold

 Pin Descriptions

Pin No. Symbol Description Pin No. Symbol Description

1 N.C. 4 VCC Power supply

2 GND Ground 5 Out Output

3 N.C. 

Unit : mm

SMINI-5DA (Lead-free package)

1 2

0.225

2.10±0.10

1.65±0.10

1.30±0.10

Seating plane

0.80±0.10

0 to 0.10

0.32

0.10

2.00±0.10

0.22+0.10

−0.05

0.11+0.10

−0.05

0.65 0.65

0.13

0.10

HL L H

Magnetic

flux density

AN48840B

output level

Maintenance/

Discontinued

Maintenance/Discontinued includes following four Product lifecycle stage.

planed maintenance type

maintenance type

planed discontinued typed

discontinued type

Please visit following URL about latest information.

http://www.semicon.panasonic.co.jp/en/

AN48840B

2 SPC00018BEB

 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 15 mA

Power dissipation *1, *2 PD60 mW

Operating ambient temperature *1 Topr −25 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 BHL VCC = 3 V, VCC = 2.5 V 0.5 6mT

Operating magnetic ﬂux density 2

*2 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

Output voltage 2 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 μA

Supply current 2 *3 ICC2AVE VCC = 2.5 V 48.0 72.0 μA

Intermittent action time Tsam VCC = 3 V 490 670 850 μS

Intermittent action time 2 Tsam2 VCC = 2.5 V 513 710 890 μS

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 × tON + ICCOFF × 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  μA

Supply current 5 ICC2ON VCC = 2.5 V 1.12 1.68 mA

Supply current 6 ICC2OFF VCC = 2.5 V 2.2  μA

Operating time tON Ta = −25°C to 75°C, VCC = 3 V 10 26 42 μS

Stop time tOFF Ta = −25°C to 75°C, VCC = 3 V 258 644 1 030 μS

Operating time 2 t2ON Ta = −25°C to 75°C, VCC = 2.5 V 11 27 43 μS

Stop time 2 t2OFF Ta = −25°C to 75°C, VCC = 2.5 V 270 674 1 078 μS

Note) It will operate normally in approximately 0.67 ms after power on.

Maintenance/

Discontinued

Maintenance/Discontinued includes following four Product lifecycle stage.

planed maintenance type

maintenance type

planed discontinued typed

discontinued type

Please visit following URL about latest information.

http://www.semicon.panasonic.co.jp/en/

AN48840B

SPC00018BEB 3

 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.

0.31

1.0

 Magneto-electro conversion characteristics

BHL

BLH

Output voltage

Direction of applied magnetic field Operating magnetic flux density

Applied magnetic flux density B

 Power dissipation of package SMINI-5DA

PD  Ta

200

0 25 15050 75 100 125

100

125

150

175

AN48840B_PD-Ta

Ambient temperature Ta (°C)

Power dissipation PD (mW)

Independent IC

without a heat sink

Rth(j-a) = 833.3°C/W

PD = 120 mW (25°C)

−6.0

−4.0

2.0

−2.0

4.0

6.0

1 3 42

AN48840B_Tokusei02

Supply voltage VCC (V)

Operating magnetic flux density B (mT)

Ta = 25°C

Sample 1 BH-L

Sample 2 BH-L

Sample 1 BL-H

Sample 2 BL-H

 AN48840B Main characterisitcs

Operating magnetic ﬂux density  Supply voltage

Maintenance/

Discontinued

Maintenance/Discontinued includes following four Product lifecycle stage.

planed maintenance type

maintenance type

planed discontinued typed

discontinued type

Please visit following URL about latest information.

http://www.semicon.panasonic.co.jp/en/

AN48840B

4 SPC00018BEB

 Technical Data (continued)

 AN48840B Main characterisitcs (continued)

Operating magnetic ﬂux density  Ambient temperature Hysteresis width  Supply voltage

−6.0

−4.0

2.0

−2.0

4.0

6.0

−50 0 25 50 75−25 100 125

AN48840B_Tokusei03

Ambient temperature Ta (°C)

VCC = 3 V

Sample 1 BH-L

Sample 2 BH-L

Sample 1 BL-H

Sample 2 BL-H

6.5

6.0

5.5

5.0

7.0

8.0

8.5

9.0

9.5

10.0

7.5

1 3 42 5

Hesteresis width BW (mT)

AN48840B_Tokusei04

Supply voltage VCC (V)

Ta = 25°C

Sample 1 BW

Sample 2 BW

Supply current  Supply voltage Low-level output voltage  Supply voltage

100

2 41 3 5

AN48840B_Tokusei05

Supply voltage VCC (V)

Supply current ICC (µA)

Output = High

−35°C

85°C

25°C

0.00

0.02

0.01

0.025

0.015

0.005

0.03

0.035

AN48840B_Tokusei06

2 41 3 5 6

Supply voltage VCC (V)

Low-level output voltage VOL (V)

IO = 2 mA

125

°C

25°C

−50°C

Δ high-level output voltage  Supply voltage Sampling period  Supply voltage

0.06

0.055

0.05

0.045

0.04

0.035

0.03

0.025

0.02

0.015

0.01

0.005

AN48840B_Tokusei07

2 41 3 5

∆ hgh-level output voltage ∆VOH (V)

Supply voltage VCC (V)

125°C

25°C

−50°C

O = −2 mA

000

900

800

700

600

500

400

300

Sampling period TS (ms)

AN48840B_Tokusei08

2 41 3

Supply voltage VCC (V)

85°C

25°C

−35°C

CC = 3 V

Maintenance/

Discontinued

Maintenance/Discontinued includes following four Product lifecycle stage.

planed maintenance type

maintenance type

planed discontinued typed

discontinued type

Please visit following URL about latest information.

http://www.semicon.panasonic.co.jp/en/

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20080805

Maintenance/

Discontinued

Maintenance/Discontinued includes following four Product lifecycle stage.

planed maintenance type

maintenance type

planed discontinued typed

discontinued type

Please visit following URL about latest information.

http://www.semicon.panasonic.co.jp/en/