LA01P 1/5 7 1612
CURRENT SENSORS
Magnetic Proportion System ／ Compact size and Hｉｇｈ-speed response
LA01P SERIES
ABSOLUTE MAXIMUM RATINGS
Parameters
Supply voltage
Jumper temperature
Output current
Symbol
Unit
Value
Comment
VDD
V
6
―
℃
120
Iout
mA
±1
―
kV
2
C=100pF，R=1.5kΩ
Symbol
Unit
Value
Comment
Vd
V
≧AC2500V，50/60Hz，for 1minute(Sensing current 0.5mA)
Primary ⇔ Secondary
kV
2.5
Primary ⇔ Secondary
Recommend ; < ±0.5mA
ISOLATION CHARACTERISTICS
Parameters
lnsulation voltage
Impulse withstand voltage
Vw
Input waveform：
・Front time 1.2μs
・Time to half value 50μs
・single
Clearance distance
Creepage distance
Case material
Comparative Tracking Index; （CTI）
ｄCi
mm
2.7
Primary ⇔ Secondary
ｄCp
mm
2.7
Primary ⇔ Secondary
―
―
UL94 V-0
CTI
V
200
Symbol
Unit
Ta
ENVIRONMENTAL AND MECHANICAL CHARACTERISTICS
Parameters
Ambient operating temperature
Ambient storage temperature
Mass
Value
MIN
TYP
Comment
MAX
℃
－40
＋90
TS
℃
－40
＋125
m
g
5
Ta=+25℃，VDD=+5V，RL≧10MΩ
SPECIFICATIONS
Parameters
Measurement current range
Maximum primary current（RMS)
Supply Voltage
Number of primary turns
Primary Jumper resistance
Current consumption (at Ip=0A)
Symbol
Unit
If
A
Value
MIN
TYP
－35
35
LA01P046S05
－46
46
LA01P054S05
－54
54
LA01P085S05
－85
85
LA01P035S05
50
Ip(RMS)max
A
VDD
V
Np
T
１
Rp
mΩ
0.10
IDD
mA
*1: When Ip(RMS)max is bigger than the value of If, Ip(RMS)max restricts it to the value of If.
4.5
5.0
Comment
MAX
5.5
１0
*1
LA01P 2/5 7 1612
CURRENT SENSORS
Ta=+25℃，VDD=+5V，RL≧10MΩ
SPECIFICATIONS
Parameters
Offset voltage
Sensitivity
Vof
V
Value
TYP
MAX
2.408
2.500
2.592
LA01P046S05
2.423
2.500
2.577
LA01P054S05
2.432
2.500
2.568
LA01P085S05
2.451
2.500
2.549
LA01P035S05
TCVo
mV
±17.0
LA01P054S05
±14.0
LA01P085S05
±9.0
58.8
60.0
61.2
LA01P046S05
44.1
45.0
45.9
LA01P054S05
39.2
40.0
40.8
LA01P085S05
24.5
25.0
25.5
G
LA01P035S05
mV/A
TCG1
±1
%
LA01P046S05
±2
LA01P054S05
±1
LA01P085S05
±1
Temperature coefficient 2 of Sensitivity
（at Ta=－40～＋35℃，Variation ratio to G(Ta=35℃)）
Output Linearity(at 0... If)
TCG2
%
Comment
±21.5
LA01P046S05
LA01P035S05
Temperature coefficient 1 of Sensitivity
（at Ta=＋35～＋90℃，Variation ratio to G(Ta=35℃)）
Unit
MIN
LA01P035S05
Temperature drift of offset voltage
(at Ta=－40～＋90℃，Variation from Vof(Ta=35℃)，Ip=0A）
Symbol
±2
εL
%
Output noise voltage
VNRMS
mVrms
Ratiometric error of sensitivity
VG-R
％
－1
1
Ratiometric error of offset voltage
Vof-R
％
－1
1
tr
μs
1
CL=100pF
BW
kHz
400
CL=100pF
Response time 1 (at 90% of If ）
Frequency bandwidth(－3dB）
－1
2.1
FUNCTIONAL BLOCK DIAGRAM
6
P
Core
Amp
Hall
Sensor
Buffer
Vout
Vss
Compensation
VDD
E2PROM
Bias
N
DATA_IO
7
SCLK
1
5
1
4
3
2
LA01P 3/5 7 1612
CURRENT SENSORS
CHARACTERISTIC CURVE（TYP） AND PRIMARY CURRENT DERATING CURVE
60
出力電圧
Vout［V］
50
Ip[RMS)max[A]
Vdd
½
Vdd
40
30
20
10
0
-60
-If
N→P
0
被測定電流
Primary current
Ip［A］
P→N
-40
-20
0
20
Ta［℃］
40
60
80
100
Conditions: Mounted on the test board complying
with the EIA/JEDEC Standards (EIA/JESD51.)
+If
CHARACTERISTICS DEFINITIONS
・Sensitivity G［mV/A］，Offset voltage Vof［V］
出力電圧
Vout［V］
最小二乗法による近似直線
The approximate straight line
by least squares method
Sensitivity (G) is defined as slope of the approximate straight line by least squares
method, using the data of the output voltage (Vout) when sweeping the measured
current Ip at rated current range.
Also Offset voltage (Vof) is defined as the intercept of the approximate straight line.
Ve
F.S.
=2×G×Ip(RMS)max
Vof
・Output linearity εL［％］
Ip［A］
-Ip(RMS)max
0
Ip(RMS)max
被測定電流
Primary current
Output linearity（εL） is defined as the ratio of maximum error voltage (Ve) to the full
scale(F.S.) , where Vd is maximum difference between the Output voltage (Vout) and
the approximate straight line calculated in the sensitivity and offset voltage definition；
εL＝Ve／F.S.×100
・When Ip(RMS)max is bigger than the value of If, Ip(RMS)max restricts
it to the value of If.
・Ratiometric error of sensitivity VG-R［％］，ratiometric error of Offset voltage Vof-R［％］
Output of LA01P Series is ratiometric.
Sensitivity（G） and Offset voltage（Vof） are proportional to Supply voltage(VDD).
Ratiometric error is defined as follows in the supply voltage range（4.5V＜VDD1＜5.5V）;
VG-R ＝100×［（G（VDD＝VDD1）／G（VDD＝5V））－（VDD1／5）］／（VDD1／5）
Vof-R ＝100×［Vof（VDD＝VDD1）－Vof（VDD＝5V）×（VDD1／5）］／F.S.
LA01P 4/5 7 1612
CURRENT SENSORS
TERMINAL DESCRIPTIONS
N
P
6
7
LA01P
xxxS05
(Top view)
Terminal №
1 ： DATA_IO Test pin（connect to GND)
2 ： VDD
Power supply（5V）
3 ： VSS
GND（0V）
1 2 3 4 5
VDD
Vout
4
5
6
7
：
：
：
：
Vout
SCLK
P
N
Analog output
Test pin（connect to GND)
Input
Output
DIMENSIONS (mm)
Note1) The tolerances of dimensions without any mention are ±0.1mm.
RECOMMENDED THROUGH-HOLE LAYOUTS (mm)
Note) If 2 or more trace layers are used as the current path,
please make enough number of through-holes to flow current
between the trace layers.
LA01P 5/5 7 1612
CURRENT SENSORS
TYPICAL APPLICATION
6
P
SCLK
5
+5V
R1
Vout 4
LA01P
xxxS05
VSS
VDD
N DATA_IO
3
2
R2
(a)
0.1
μF
(b)
R1
RF (c)
CF
AIN
VSS A/D
R2
VREF
1
7
(a) Please be placed the bypass capacitor 0.1μF as close as possible to the V DD and VSS pins of LA01P Series.
(b) LA01P Series have a ratiometric output. When received output by the A / D converter , it is possible to reduce the A / D conversion error
due to supply voltage fluctuations by setting a common voltage level of the A / D converter and supply voltage.
The resistive divider with R1 and R2 is required, if the reference voltage of the A / D converter is lower than +5V.
(c) If necessary, please insert a low-pass filter to Vout.
TYPE DESIGNATION
LA01 P
①
＊＊＊ S 05
②
③ ④ ⑤
① Model（4 figures)
LA01 ： Series
② Mounting configuration（1 figure)
P ： PCB Mounting type
③ Measurement current range（3 figures）
Ex) 035 ： 35A 085 ： 85A
④ Control power supply type（1 figure)
S ： Single supply
⑤ Power supply voltage（2 digits)
Notices
CURRENT SENSORS
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3 1510
Important Notice
7. This product is not designed to resist radiation.
1. The content of this information is subject to change without
vehicle equipment, safety devices, and so on) in which
・U se in liquids such as water, oil, chemical solutions, or
organic solvents, and use in locations where the product will
be exposed to such liquids.
・U se that involves exposure to direct sunlight, outdoor
exposure, or dusty conditions.
・Use in locations where corrosive gases such as sea winds,
Cl2, H2S, NH3, SO2, or NO2, are present. (Some product
improves durability)
・U se in environments with strong static electricity or
electromagnetic radiation.
・Use that involves placing inflammable material next to the
product.
・Use of this product either sealed with a resin filling or coated
with resin.
・Use of water or a water soluble detergent for flux cleaning.
・Use in locations where condensation is liable to occur.
extremely high quality and high reliability is required, or if
8. D o not use or otherwise make available the TAMUTA
the malfunction or failures of product could be cause loss of
products or the technology described in this document for any
human life, bodily injury.
military purposes, including without limitation, for the design,
prior notice for the purpose of improvements, etc. Ensure that
you are in possession of the most up-to-date information when
using this product.
2. T his product is intended to be used in general electronics
applications (electric home appliances, business equipment,
information equipment, communication terminal equipment,
measuring devices, industrial equipment, and so on). This
product is neither intended nor warranted for use in following
equipment or devices:
Special application (such as for medical devices,
transportation equipment, traffic signal control equipment,
fire and crime prevention equipment, aeronautics and
space devices, nuclear power control, fuel control, in-
Tamura Corporation shall not be held responsible for any
development, use, stockpiling or manufacturing of mass
damage incurred by customers or any third party when products
destruction weapons (e.g. nuclear, chemical, or biological
are used in special application, unless specifically permitted in
weapons or missile technology products). When exporting
this document.
and re-exporting the products or technology described in this
document, you should comply with the applicable export control
3. Tamura Corporation constantly strives to improve quality and
laws and regulations and follow the procedures required by
reliability, but malfunction or failures are bound to occur with
such laws and regulations including, without limitation, Japan
some probability in current sensor. To ensure that failures do
-Foreign Exchange and Foreign Trade Control Law and U.S.-
not cause accidents resulting in injury or death, fire accidents,
Export Administration Regulations. The TAMURA products
social damage, and so on, users are to thoroughly verify the
and related technology should not be used for or incorporated
safety of their designs in devices and/or systems.
into any products or systems whose manufacture, use, or sale
is prohibited under any applicable domestic or foreign laws or
4. The operation examples and circuit examples shown in this
regulations.
information are for reference purposes only, and Tamura
Corporation disclaims all responsibility for any violations of
9. Please contact your TAMURA sales office for details as to
industrial property rights, intellectual property rights and any
environmental matters such as the RoHS compatibility of
other rights owned by Tamura Corporation or third parties that
Product. Please use TAMURA products in compliance with all
these may entail.
applicable laws and regulations that regulate the inclusion or
5. T he circuit examples and part constants listed in these
use of controlled substances, including without limitation, the
specifications are provided as reference for the verification
EU RoHS Directive. TAMURA assumes no liability for damages
of characteristics. The user is to perform design, verification,
or losses occurring as a result of your noncompliance with
and judgment under his or her own responsibility, taking into
applicable laws and regulations.
account the various conditions.
10. T
AMURA assumes no liability for damages or losses incurred by
you or third parties as a result of unauthorized use of TAMURA
6. T he products are designed for use in environments where
products.
consumer electronics are commonly used. It is not designed for
use in special environments such as listed below, and if such
11. T his document and any information herein may not be
use is considered, the user is to perform thorough safety and
reproduced in whole or in part without prior written permission
reliability checks under his/her responsibility.
from TAMURA.
9
Appli note
CURRENT SENSORS
1/1
3 1709
Application notes
1. T he sensor uses polar electronic components. When the
1. High frequency primary current may result in excessive heating
polarity of the power supply is mistaken, the sensor is damaged.
in iron magnetic core and cause damage to internal circuitry;
2. Static electricity or excessive voltage can increase an offset
for high frequency applications select current sensor with ferrite
voltage in the Hall element, and cause offset voltage to change.
core material.
2. If the measured current exceeds the rated current, magnetic
Please exercise care in handling and application.
core saturation will occur and the output voltage signal will not
3. In order to prevent the influence of noise, the use of twisted
be linearly proportional to the measured current.
cable or shielded cable for the output line is recommended
4. If using this device within a magnetic field generated by other
devices, the specified accuracy may not be obtainable.
5. O ur products（several models are excluded ）are adjusted
1. For closed loop current sensors please insure the power supply
with the trimming method by the measurement condition
voltage is balanced, symmetrical, and, applied simultaneously
（Load resistance, Power supply voltage）of specification
to avoid potential increase in DC offset error.
sheets. Therefore, characteristics（Offset, Output, etc.）and its
2. Maximum rated current measurement duration is timedependent.
deviation may be changed in different circuit conditions from
Maximum rated current applied in excess of the time limit can
the measurement condition. All change characteristic items are
result in damage to internal electronic circuitry; please consult
not indicated on specification sheets.
Tamura for assistance.
6. The performance of current sensors with through-hole（aperture）
3. When using a measurement resistor to convert current output
is dependent on the position of the primary conductor. Tamura
to voltage output select a resistor with stable temperature
specifications are based on a primary conductor completely
characteristic to insure accuracy of the output voltage.
filling the through-hole（aperture）area.
4. Compensation current supplied to the secondary winding varies
7. T
he current sensor rated current in DC Amps.
in proportion to the measured current based on the conversion
8. Please use mating connector with equivalent terminal plating
ratio.（If/KN; KN ＝ secondary turns）Please insure the PSU
material to insure proper operation and avoid possibility of
has required current capacity to supply compensation current
‘galvanic corrosion’.
to the secondary winding.
9. P lease do not store in high-temperature and high-humidity
storage environment. Please use it after confirming soldering
when it is kept for six months or more.（product soldered with
1. Compensation current supplied to the secondary winding varies
substrate）
10. We recommend performing a zero offset adjustment by measuring
in proportion to the measured current. Please insure the PSU
the offset voltage at startup. In continuously operation for a few
has required current capacity to supply compensation current
to the secondary winding.
months, or at change of ambient temperature or humidity is large,
2. T here is 450kHz ripple voltage present on the output and
we recommend regularly performing a zero offset adjustment at
reference output voltage signals . An external capacitor maybe
being idling（it is clear that the current is not apply）.
added if necessary.
11. The current sensor doesn't have built-in protection circuit
(devices and fuses, etc.). As a failure mode of the sensor,
there is a short circuit and open state. In the case of a shortcircuit state, the abnor-mal temperature rise of the internal
parts is assumed, and there is a possibility to smoke and to
ignite. If it is used in safety critical circuit blocks, please take
appropriate measures by protection devices, protection circuits,
etc. For closed loop –type sensors and flux gate (closed loop
type) sensors, the consumption current of the secondary power
supply varies in proportion to the measurement current.
7
