Individual Specification
AN48800A
Low current consumption, high sensitivity CMOS Hall IC
One-way magnetic field operation
0.10 M
1.50+0.25
−0.05
2
1.10+0.20
−0.10
High sensitivity (6 mT max.) due to offset cancel circuit and a new
0.10
0.11+0.10
−0.05
0.65±0.15
1
0.95
0.95
1.90±0.20
2.90+0.20
−0.05
2.80+0.20
−0.30
3
■ Features
sample and hold circuit
Small current by using intermittent action (10 µA typ.)
Small package (SMD)
Open drain output
Unit : mm
1.10+0.30
−0.10
The AN48800A is a Hall IC (a magnetic sensor) which has 2 times
or more sensitivity and a low current consumption of about one threehundredth 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.
0.40+0.10
−0.05
0.65±0.15
(1.45)
0 to 0.10
■ Overview
0.40±0.20
0.10 to 0.30
Seating plane
MINI-3DRA (Lead-free package)
■ Applications
Flip type cellular phone, digital video camera
■ Block Diagram
1
Intermittent action
2
Offset
cancel
Out
Comparator
Amplifier
Hall
element
VCC 2.5 V to 3.5 V
Sample
and
hold
3
GND
Note) The magnetism detection time should be longer than one intermittent action cycle (On = 200 µs and Off = 51 ms).
■ Pin Descriptions
20
Pin No.
Symbol
Description
1
VCC
Power supply
2
Out
Output
3
GND
Ground
AN48800A
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply voltage
VCC
5
V
Output voltage
VOUT
5
V
Supply current
ICC
5
mA
IOUT
30
mA
PD
60
mW
Topr
−20 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 = 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
Supply voltage
Symbol
Range
Unit
VCC
2.5 to 3.5
V
■ Electrical Characteristics Ta = 25°C ± 2°C
Parameter
Symbol
Min
Typ
Max
Unit
VCC = 3 V
6
mT
BL-H
VCC = 3 V
0.5
mT
VOL
VCC = 3 V, IO = 5 mA, B = 6.0 mT
0.1
0.3
V
IOH
VCC = 3 V, VO = 3 V, B = 0.5 mT
10
µA
VCC = 3 V, B = 0.5 mT
10
15
µA
Min
Typ
Max
Unit
VCC = 3 V
1.2
mT
Operating magnetic flux density 1
*1
BH-L
Operating magnetic flux density 2
*2
Output voltage
Output current
Supply current 1
*3
ICCAVE
Conditions
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: ICCAVE = {ICCON × tON + ICCOFF × tOFF}/{tON + tOFF}
Design reference data
Parameter
Hysteresis width 1
Symbol
BW
Conditions
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.
21
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.
0.39
1.2
0.5
0.5
0.5
Magneto-electro conversion characteristics
S
Output voltage
BL-H
BW
BH-L
N
Applied magnetic flux density B
Operating magnetic flux density
Direction of applied magnetic field
Simple polarity distinction method of mounting magnet to product incorporating Hall IC
Magnet
Plastic bar
Plastic cover
Magnet for Hall IC
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.
22
AN48800A
■ Technical Data (continued)
Main characterisitcs
AN48800A_Tokusei01
AN48800A_Tokusei02
Operating magnetic flux density Ambient temperature
Operating magnetic flux density Supply voltage
2.0
6
VCC = 3.0 V
Sample 1 BW
Operating magnetic flux density B (mT)
Operating magnetic flux density B (mT)
Ta = 25°C
1.5
Sample 2 BW
1.0
Sample 3 BW
0.5
Sample 1 BH-L
5
Sample 3 BH-L
Sample 1 BL-H
4
Sample 2 BH-L
Sample 3 BL-H
3
Sample 2 BL-H
0
2
2.5
3
3.5
4
4.5
2
−25
5
0
Supply voltage VCC (V)
AN48800A_Tokusei03
Operating magnetic flux density Supply voltage
6
Output = High
Average consumption current ICCAVE (µA)
Operating magnetic flux density B (mT)
Sample 2 BL-H
4
Sample 1 BH-L
Sample 1 BL-H
Sample 3 BH-L
2
Sample 3 BL-H
1
0
2
2.5
3
3.5
4
4.5
20
15
10
−50°C
25°C
5
0
5
Supply voltage VCC (V)
125°C
0
2
1
3
4
5
6
Supply voltage VCC (V)
AN48800A_Tokusei06
Low-level output voltage Ambient temperature
AN48800A_Tokusei05
Low-level output voltage Supply voltage
0.20
75
25
Sample 2 BH-L
3
50
AN48800A_Tokusei04
Average consumption current Supply voltage
Ta = 25°C
5
25
Ambient temperature Ta (°C)
0.14
IO = 5 mA
VCC = 3.0 V
Low-level output voltage VOL (V)
Low-level output voltage VOL (V)
0.12
0.15
75°C
25°C
0.10
−25°C
−50°C
0.05
0.10
0.08
0.06
0.04
0.02
0.00
0
1
2
3
4
Supply voltage VCC (V)
5
6
0.00
−50
−25
0
25
50
75
100
125
Ambient temperature Ta (°C)
23