AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGYHSTDR 300-000, HSTDR 400-000, HSTDR 600-000, HSTDR 900-000, HSTDR 1000-000, HSTDR 1200-000, HSTDR 1200/SP1-000,
HSTDR 1300-000, HSTDR 1500-000

Introduction

Principle of HSTDR-000 family

The HSTDR-000 family is a transducer for DC, AC, or
pulsed currents measurement in high power and low voltage
automotive applications. It offers a galvanic separation
between the primary circuit (high power) and the secondary
circuit (electronic circuit).
The HSTDR-000 family gives you a choice of having different
current measuring ranges in the same housing (from ±300 A up
to ±1500 A).

The open loop transducers uses a Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the Hall
voltage, is generated by the primary current IP to be measured.
The current to be measured IP is supplied by a current source
i.e. battery or generator (Figure 1).
Within the linear region of the hysteresis cycle, B is proportionalto:
B (IP) = a × IP

Features

The Hall voltage is thus expressed by:● Open Loop transducer using the Hall effect sensor● High insulation level● Unipolar +5 V DC power supply● Primary current measuring range up to ±1500 A● Operating temperature range: −40 °C < T < +125 °C

UHall = (cHall / d) × IHall × a × IP
Except for IP, all terms of this equation are constant.
Therefore:
UHall = b × IPaconstantb

constant

Advantages

cHall

Hall coefficient● Excellent accuracydthickness of the Hall plate● Very good linearity

IHall

current across the Hall plates● Output voltage: fully ratio-metric (in sensitivity and offset).

● Very low thermal offset drift● Very low thermal sensitivity drift

The measurement signal UHall amplified to supply the user
output voltage or current.

● High frequency bandwidth● No insertion losses● Very fast delay time.

Automotive applications

+ UC

IP

● Starter Generators- UC● Inverters

Primary Current IP● HEV applications● EV applications● DC / DC converters

Uout

0V

Insulated Output Voltage Uout

Fig. 1: Principle of the open loop transducer.

● DC link.

N° 97.X5.46.000.0, N° 97.X5.48.000.0, N° 97.X5.52.000.0, N° 97.X5.58.000.0, N° 97.X5.60.000.0, N° 97.X5.62.000.0, N° 97. X5.62.001.0, N° 97.X5.63.000.0, N° 97.X5.65.000.0
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

Page 1/9

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000
Dimensions (in mm)

HSTDR 300-000, HSTDR 400-000, HSTDR 600-000, HSTDR 900-000, HSTDR 1000-000, HSTDR 1200-000, HSTDR 1300-000, HSTDR 1500-000

Dimensions (in mm)
HSTDR 1200/SP1-000

Mechanical characteristics
Refer to Outline Drawing.

Mounting recommendation

Remark● Uout > UO when IP flows in the positive direction (see arrowon drawing).

Assembly refer to Outline Drawing.
Page 2/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000
Electronic recommendation
Typical application

LEM Transducer
+5 V

IP M

+5 V

Shematic interface

UC

47 nF

C1

Primary
Current

Uout

R
CL

C2

RL

C

Magnetic CoreGND

RL > 10 kΩ optional resistor for signal line diagnostic (optional)
CL < 2.2 nF EMC protection (optional)
RC: low pass filter (optional)

Page 3/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000

Absolute ratings (not operating)Parameter

SymbolUnit

Min

Specification
TypicalMax

08Continuous, not operating

6.5

Exceeding this voltage may
temporarily reconfigure the circuit until
UC comes back to 5 V

Maximum supply voltage

UC maxV

Ambient storage temperature

TA st

°C

Electrostatic discharge voltage(HBM - Human Body Model)

UESD HBMkV

8

RMS voltage for AC insulation test

Ud

kV

4.7

Creepage distance

dCp

mm

16.5

Clearance

dCI

mm

9.5

Comparative tracking index

CTI

-

PLC3

Maximum output current

Iout max

mA

−10

10

Maximum output voltage

Uout maxV−0.5

UC + 0.5

Insulation resistance

RINS

MΩ

500

−40

Conditions

125

50 Hz, 1 min, IEC 60664 part1

1000 V DC

Operating characteristics in nominal range (IP N)
Parameter

SymbolUnit

Min

Electrical Data

Specification
TypicalMax
5

Conditions

Supply voltage 1)

UC

V

4.75

5.25

Ambient operating temperature 2)

TA

°C

−40

Load capacitanceCLnF

Output voltage (Analog)

Uout

V

Uout = (UC/ 5) × (UO + S × IP )Offset voltage

UO

V

2.5

@ UC = 5 V

Current consumption

IC

mA

15

@ UC = 5 V, @ TA = 25 °C

Load resistanceRLΚΩ

Output internal resistance

Rout

125
2.2

10

Ω

10

DC to 1 KHz

Performance Data

Ratiometricity error

εr

%

±0.3

@ TA = 25 °C

Sensitivity error

εS

%

±1

@ TA = 25 °C, @ UC = 5 V

Electrical offset voltage

UO E

mV

±4

@ TA = 25 °C, @ UC = 5 V

Magnetic offset voltage

UO M

mV

±2

@ TA = 25 °C, @ UC = 5 V

Average temperature coefficient of UO E

TCUO E AV

mV/°C

−0.08

±0.04

0.08

@ −40 °C < TA < 125 °C

Average temperature coefficient of S

TCSAV

%/°C

−0.03

±0.01

0.03

@ −40 °C < TA < 125 °C

Linearity errorεL% IP M±1

Delay time to 90 % of the final output value for
IP N step

tD 90

µs

2

Frequency bandwidth 3)

BW

kHz

Peak-to-peak noise voltage

Uno ppmV

9@ DC to 1 MHz for HSTDR 1500-000

Peak-to-peak noise voltage

Uno ppmV

22@ DC to 1 MHz for HSTDR 300-000

Phase shift∆φ°

Notes:

1)

40@ UC = 5 V, @ TA = 25 °C, @ IP = IP M
6

di/dt = 100 A /µs@ −3 dB−4@ 1 kHzThe output voltage Uout is fully ratiometric. The offset and sensitivity are dependent on the supply voltage UC relative to the following formula: 5
 1
IP = 
× U out − U O  × with S in (V/A)
 UC
 S

2)
3)

Absolute maximum ambient operating temperature (include busbar): +150 °C
Primary current frequencies must be limited in order to avoid excessive heating of the sensor higher than 125 °C.

18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

Page 4/9
LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000

HSTDR 300-000
Parameter

SymbolUnit

Min

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

Specification
TypicalMax−300

Conditions

300
6.67

@ UC = 5 V

HSTDR 400-000
Parameter

Min

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

Specification
TypicalMax−400

Conditions

400
5@ UC = 5 V

HSTDR 600-000
Parameter

Min

Specification
Typical
Max

−600

600

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

3.33

Conditions@ UC = 5 V

HSTDR 900-000
Parameter

Min

Specification
Typical
Max

−900

900

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

2.22

Conditions@ UC = 5 V

HSTDR 1000-000
Parameter

Min

Specification
Typical
Max

−1000

1000

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

2Conditions@ UC = 5 V

HSTDR 1200-000, HSTDR 1200/SP1-000
Parameter

Min

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

Specification
TypicalMax−1200

Conditions

1200
1.67

@ UC = 5 V

HSTDR 1300-000
Parameter

Min

Specification
Typical
Max

−1300

1300

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

SymbolUnit

1.54

Conditions@ UC = 5 V

HSTDR 1500-000
Parameter

Min

Specification
Typical
Max

−1500

1500

Electrical Data

Primary current, measuring range

IP M

A

Sensitivity

S

mV/A

1.33

Conditions@ UC = 5 V

Page 5/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000
Total error

HSTDR xxxx-000: Absolute Total error εtot @ UC = 5 V
specified @ 3 sigma (|IP M | ≤ 1300 A)±80.0

Total error (mV)

±70.0
±60.0
±50.0
±40.0
±30.0
±20.0
±10.0
±0.0

-IP M

IP M

0
Primary current (A)Total error @ TT range initialPrimary current

Total error
T = 25 °C,
UC = 5 V initial

Total error @ TT range After reliability

Total error−40 °C ≤ T ≤ 125 °C,
UC = 5 V initial

Total error
T = 25 °C,
UC = 5 V After reliability

Total error−40 °C ≤ T ≤ 125 °C,
UC = 5 V After reliability

(%)

(mV)

(%)

(mV)

(%)

(mV)

(%)

(A)

(mV)

−IP M ≥ −1300

±40

±2 %

±55

±2.75 %

±65

±3.25 %

±70

±3.5 %

0±10±0.5 %±15±0.75 %

±15

±0.75 %

±20

±1 %IP M ≤ 1300

±40

±2 %

±55

±2.75 %

±65

±3.25 %

±70

±3.5 %−1500 ≤ −IP M < −1300±55±2.75 %

±70

±3.5 %±65±3.25 %

±70

±3.5 %

1500 ≥ IP M > 1300

±55

±2.75 %

±70

±3.5 %±65±3.25 %

±70

±3.5 %

RemarkSpecific application, please refer to LEM document_'Application Note N°ANE230327' available on our Web site:
https://www.lem.com/sites/default/files/marketing/hstdr__hsndr__ham_application_note_v0.pdf

Page 6/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000
PERFORMANCES PARAMETERS DEFINITIONS

Response time (delay time) tD 90:

Primary current definition:

The time between the primary current signal (IP N) and theoutput signal reach at 90 % of its final value.

Uout

I [A]

Primary current nominal (IP N)
Primary current, measuring range (IP M)

IT

90 %
Uout

IP
tD 90

IP

Definition of typical, minimum and maximum values:
Minimum and maximum values for specified limiting and safety
conditions have to be understood as such as values shown in“typical” graphs. On the other hand, measured values are partof a statistical distribution that can be specified by an intervalwith upper and lower limits and a probability for measured
values to lie within this interval. Unless otherwise stated(e.g. “100 % tested”), the LEM definition for such intervals
designated with “min” and “max” is that the probability forvalues of samples to lie in this interval is 99.73 %. For a normal(Gaussian) distribution, this corresponds to an interval between−3 sigma and +3 sigma. If “typical” values are not obviouslymean or average values, those values are defined to delimit
intervals with a probability of 68.27 %, corresponding to aninterval between −sigma and +sigma for a normal distribution.
Typical, minimum and maximum values are determined during
the initial characterization of a product.

Output noise voltage:t [µs]

Sensitivity:
The transducer’s sensitivity S is the slope of the straight line
Uout = f (IP), it must establish the relation:
Uout (IP) = UC/ 5 (S × IP + UO)

Offset with temperature:
The error of the offset in the operating temperature is thevariation of the offset in the temperature considered with theinitial offset at 25 °C.
The offset variation IO T is a maximum variation the offset in thetemperature range:
IO T = IO E max − IO E min

The output voltage noise is the result of the noise floor of theHall elements and the linear amplifier.

The offset drift TCIO E AV is the IO T value divided by thetemperature range.

Magnetic offset:

Sensitivity with temperature:

The magnetic offset is the consequence of an any current on
the primary side. It’s defined after a stated excursion of primary
current.

Linearity:
The maximum positive or negative discrepancy with a reference
straight line Uout = f (IP).
Unit: linearity (%) expressed with full scale of IP N.

Uout

The error of the sensitivity in the operating temperature is therelative variation of sensitivity with the temperature consideredwith the initial offset at 25 °C.
The sensitivity variation ST is the maximum variation (inppm or %) of the sensitivity in the temperature range:
ST = (Sensitivity max − Sensitivity min) / Sensitivity at 25 °C.
The sensitivity drift TCS AV is the ST value divided by thetemperature range. Deeper and detailed info available is ourLEM technical sales offices (www.lem.com).

Offset voltage @ IP = 0 A:

Non linearity example

The offset voltage is the output voltage when the primary current
is zero. The ideal value of UO is UC/ 2. So, the difference ofReferencestraight line
Max linearity error

IP
Linearity variation in IP N

UO − UC/ 2 is called the total offset voltage error. This offset error
can be attributed to the electrical offset (due to the resolution of
the ASIC quiescent voltage trimming), the magnetic offset, thethermal drift and the thermal hysteresis. Deeper and detailed
info available is our LEM technical sales offices (www.lem.
com).

Environmental test specifications:
Refer to LEM GROUP test plan laboratory CO.11.11.515.0 with
“Tracking_Test Plan_Auto” sheet.
Page 7/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000

Validation test specifications
Name

Standard

Condition

ELECTRICAL TESTSFrequency bandwidth

LEM 98.20.00.538.0

30 Hz to 100 kHz; At 20 A peak ;≥ 40 kHz @ −3 dB

Phase delay

LEM 98.20.00.538.0

Power supply 5 V, IP = 0 A 30 Hz to 100 kHz;At 20 A peak

Output voltage Noise (peak-to-peak)LEM 98.20.00.575.0

Sweep from DC to 1 MHz

Delay time ; di/dt

LEM 98.20.00.545.0

100 A/µs ; tD 90 of IP N ≤ 6 µs

du/dt

LEM 98.20.00.545.0

Slope: 5 kV/µs U = 1000 V

ENVIRONMENTAL TESTS
Ageing 85 °C /85 % RH

JESD 22-A101(03/2009)

85 °C/85 % RH; Duration = 1000 h; Power supply 5 V ;primary current 0 A; Monitoring output 1 time/hr

Low temperature operating endurance

ISO 16750-4 § 5.1.1.2(04/2010)−40 °C, 24 h; Power supply 5 V
Monitoring: 2 times/hr

High temperature operating endurance

ISO 16750-4 § 5.1.2.2(04/2010)

Temperature 125 °C; 96 h; power supply 5 V
Monitoring 2 times/hr

High temperature storage

AQG 324 (2019) § 9.4

T = 125 °C; Duration = 1000 h; UC = no powersupply ( unconnected)

Low temperature storage

ISO 16750-4 5.1.1.1(2006) T = −40 °C; Duration = 1000 h; UC = no powersupply ( unconnected)

Humidity heat, cyclic test: Test 2 Composite
temperature/humidity cyclic test

ISO 16750-4 § 5.6.2.3(04/2010)

Temperature range −10 °C/ +65 °C, 93 % RH
Duration = 240 h (10 cycles)

Thermal shock

ISO 16750-4 § 5.3.2(04/2010)

Temperature range −40 °C& 125 °C, 300 cycles;
40 min/40 min, no power supply

Sinus Vibration

Monitoring UC and Uout is mandatory,
ISO 16750-3 § 4.1.2.2.2.2
Temperature −40/125 °C, 22 H/axis, 100 Hz to 440 Hz(12/2012)
Sweep: ≤ 0.5 oct/min

Random Vibration

ISO 16750-3 § 4.1.2.2.2.3 Monitoring UC and Uout is mandatory, Temperature −40/125 °C, 22 H/(12/2012)
axis, 10 to 2000 Hz 10 G (RMS)

Mechanical Shocks

ISO 16750-3 § 4.2.2(12/2012)

Operating mode: 3.2
Pulse shape: half sine, 50 G, 6 ms
10 shocks per direction (total 60)

Free Fall

ISO 16750-3 § 4.3(12/2012)

3 pcs, Falls/DUT: 2 times, Height = 1 m
3 axes, 2 directions by axis,
Operating mode: 1.1

Cross section checking on PCBA

IPC-A-610G: 2017Class 3W

IPC-TM-650 2.1.1F:2015

Cross section checking on solderlessconnections

GB/T 18290.5-2015

IPC-TM-650 2.1.1F:2015

Whisker checking on PCBA

Refer to JESD201-A(04/2010)

Refer to JESD22-A121A (04/2010)
Class 2INSULATION TESTSDielectric withstand voltage

ISO 16750-2 § 4.11
(11/2012)

4.7 kV test voltage, time = 60 s, No dielectric breakdown, no flashover, functional after test

Insulation test

ISO 16750-2 § 4.12
(11/2012)

1000 V DC, time = 60 s, RINS ≥ 500 MΩ Minimum

Page 8/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

HSTDR xxxx-000
EMC TESTS
Immunity to Electrostatic Discharges(Handling of devices)

ISO 10605(07/2008)

Discharge module: 150 pF/2000 ΩContact discharges: ±4.6 kV, Air discharges: ±8 kV
UC = NO power supply, Criteria B

Immunity to Radiated disturbances(ALSE)

ISO 11452-2(2019)

Power supply: 5 V
f = 400 MHz to 1 GHz; Level = 100 V/m (CW, AM 80 %)f = 0.8 GHz to 2 GHz; Level = 70 V/m (CW, PM PRR = 217 Hz
f = 1 GHz to 2 GHz; Level = 70 V/m (CW)
Criteria A acceptance @ 5 % of 2 V

Immunity to Conducted disturbances(BCI)

ISO 11452-4(12/2011)

Level = see Annex E Fig. & Table E.1 (Test Level II)
f = 1 MHz to 400 MHz
Criteria A acceptance @ 5 % of 2 V

Emission Radiated(ALSE)CISPR 25 §6.5
(2016)

Table 7, Class 5 by default
f = 150 kHz to 2.5 GHz
Load simulator will be provided (R&D)

Page 9/9
18April2024\Version 1

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com