AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGY
DHAB S/159

Picture of product with pencil

Introduction

Principle of DHAB family

The DHAB family is best suited for DC, AC, or pulsed currents
measurement in high power and low voltage automotive
applications. It features galvanic separation between the primarycircuit (high power) and the secondary circuit (electronic circuit).

The open loop transducers uses a Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the HallThe DHAB family gives you a choice of having different current
measuring ranges in the same housing (from ± 20 up to ± 900A).

Featuresvoltage, 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
The Hall voltage is thus expressed by:
VH = (cH / d) × IH × a × IP●● Open Loop transducer using the Hall effect●● Low voltage application●● Unipolar +5 V DC power supply●● Primary current measuring range up to ±100 A for channel
1 and ±600 A for channel 2●● Maximum RMS primary admissible current: defined bybusbar to have T < +150 °C●● Operating temperature range: −40 °C < T < +125 °C●● Output voltage: full ratio-metric (in sensitivity and offset).

Except for IP, all terms of this equation are constant.
Therefore:
VH = b × IPaconstantb
constantcHHall coefficient
dthickness of the Hall plate
current across the Hall plates
IH
The measurement signal VH amplified to supply the user outputvoltage or current.

Special feature●● Dual channel sensor for wider measurement range andredundancy.

Advantages●● Good accuracy for high and low current range●● Good linearity●● Low thermal offset drift●● Low thermal sensitivity drift

Fig. 1: Principle of the open loop transducer.

●● Hermetic package.

Automotive applications●● Battery Pack Monitoring●● Hybrid Vehicles●● EV and Utility Vehicles.

N° 97.B6.99.159.0
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DHAB S/159
Dimensions (in mm)

IPVoutVoutUC

Mechanical characteristics

System Architecture (example)●● Plastic case				>PBT-GF30<●● Magnetic core			Channel 1: FeNi alloy				Channel 2: FeSi alloy●● Electrical terminal coating

Brass tin plated●● Mass				82 g●● Degrees of protection provided by enclosure IP6K9K

Mounting recommendation●● Connector type			

TYCO 1-1456426-5●● Assembly torque max			

2.5 N٠m (for M4 x 0.7●● Soldering type

N/A.		

Remark

LEM - DHAB sensor.
+ 5V

Typical application +5VSchematic interface.

47 nF

100 nF

Gnd

Gnd

I P/M
Primarycurrent

Channel 1

CL68 nF
Gnd

RGnd

Gnd Gnd

CLGndGnd

CRL

Channel 2
68 nF●● Vout > VO when IP flows in the positive direction (see arrowon drawing).

UCRCRL

Gnd Gnd

Gnd

RL > 10 kW optional resistor for signal line diagnostic
CL < 100 nF EMC protection
RC Low pass filter EMC protection (optional)

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DHAB S/159

Absolute ratings (not operating)Parameter

Specification
TypicalMax
14125

SymbolUnit

Maximun supply voltage
Ambient storage temperature

UCTSV°C

Electrostatic discharge voltage

UESDkV8

IEC 61000-4-2 - ISO 10605

RMS voltage for AC insulation test, 50 Hz, 1 min
Creepage distance
Clearance
Comparative tracking index
Maximum output current
Maximum output voltage (nalog)
Insulation resistance
Output short circuit maximum duration

UddCpdCI
CTIIoutVoutRINStckVmmmm

2.5

ISO 16750-2

1014

Continuous
Output over voltage,1 min @TA= 25 °C
500 V DC, ISO 16750-2mAVMΩsMin−14−40Conditions

3.1
3.1
PLC3−10−14500

120

Operating characteristics in nominal range (IPN)
Parameter

SymbolSupply voltage 1)
Current consumption
Maximum output current
Load resistance
Capacitive loading

VmAIout

mA−1RLΚΩ

10CLnF°C

Specification
TypicalMax

55.25

15204.75

ICTA

Primary current, measuring range
Primary nominal DC or RMS current
Offset voltage
Sensitivity
Resolution
Output clamping voltage1)
Output clamping voltage1)
Output internal resistanceFrequency bandwidth 2)
Power up time

MinElectrical DataUCAmbient operating temperatureUnit11100−1065

High accuracy−40125

Reduced accuracy

Performance Data channel 1IP M channel 1

A−100

IP N channel 1

A−100VOVGmV/A20@ UC = 5 VmV

2.5@ UC = 5 V

100
100
2.5VSZmin

V

0.2

0.25

0.3

@ UC = 5 VV

4.7

4.75

4.8

@ UC = 5 VΩ110Hz70BWms@ −3 dB1ms

10

Ratiometricity error

εr%−0.60.6

Output voltage noise peak-peakVno ppmV−1010

Performance Data channel 2
IP M channel 2A−600

A−600

VOV

2.5

@ UC = 5 VGmV/A

3.33@ UC = 5 VmV

2.5

IP N channel 2

Output voltage noise peak-peak

600
600

@TA = 25 °C@ UC = 5 VVSZmin

V

0.2

0.25

0.3

@ UC = 5 V

VSZmax

V4.7

4.75

4.8

@ UC = 5 VRoutΩ

110Hz70BW

Setting time after over load
Ratiometricity error@TA = 25 °C@ UC = 5 V

VSZmaxRout

Setting time after over load

Primary current, measuring range
Primary nominal DC or RMS currentOffset voltage
Sensitivity
Resolution
Output clamping voltage1)
Output clamping voltage1)
Output internal resistanceFrequency bandwidth 2)
Power up timeConditions@ −3 dB

ms1

ms

10εr

%

−0.60.6

Vno ppmV−1010Notes: 1) The output voltage Vout is fully ratiometric. The offset and sensitivity are dependent on the supply voltage UC relative to the following formula:
IP = (2)51
× Vout − VO) ×with G in (V/A)
UCG

Primary current frequencies must be limited in order to avoid excessive heating of the busbar, magnetic core and the ASIC (see feature paragraph in p.1).
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DHAB S/159

Accuracy
Channel 1
Parameter

SymbolSpecification

Unit

Min

TypicalConditions

Max

Electrical Data
Electrical offset current

IO EA

±0.07

@TA = 25 °C

Magnetic offset current

IO M

A

±0.03

@TA = 25 °C

Offset current

IO

A

−0.20

0.20

@TA = 25 °C

−0.28

0.28

@ −10 °C < T < 65 °C

0.35@ −40 °C < T < 125 °C

−0.35
εG

Sensitivity error%εL

Linearity error%±0.4@TA = 25 °C±1.0@ −10 °C < T < 65 °C±1.5@ −40 °C < T < 125 °C±0.5@TA = 25 °C, @ Uc = 5 V, of full range

Accuracy table

Parameter

SymbolUnit

Temperature

Accuracy @ 0 A
Accuracy @ ±50 AX

AAccuracy @ ±100 A−40 °C- 20 °C

0 °C

25 °C

65 °C

125 °C

0.35

0.30

0.26

0.20

0.26

0.35

1.50

1.25

1.01

0.70

1.02

1.50

3.75

3.06

2.37

1.50

2.40

3.75

DHAB S/159 Channel 1: Absolute Accuracy X (A)4.00

Absolute accuracy (A)

3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00

-40

-20

02040

60

80

100120140

Temperature (°C)
Accuracy @ 0 A

Accuracy @ ±50A

Accuracy @ ±100A

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DHAB S/159

Accuracy
Channel 2Parameter

SymbolSpecification

Unit

Min

TypicalConditions

Max

Electrical Data
Electrical offset current

IO EA

Magnetic offset currentIO MAIO

Offset current

Linearity error%

SymbolUnit@TA= 25 °C

−1.50

1.50

@TA= 25 °C

−1.66

1.66

@ −10 °C < T < 65 °C−1.81.8%

εL@TA= 25 °C±0.25AεG

Sensitivity error±0.6@ −40 °C < T < 125 °C±0.4@TA = 25 °C±0.8@ −10 °C < T < 65 °C±1.2@ −40 °C < T < 125 °C±0.5@TA = 25 °C, @ Uc = 5 V, of full range

Accuracy table

Parameter

Temperature−40 °C−20 °C

0 °C

25 °C

65 °C

125 °C

1.80

1.71

1.62

1.50

1.62

1.80

10.80

9.69

8.58

7.20

8.64

10.80

18.00

15.79

13.57

10.80

14.48

20.00

Accuracy @ 0 A
Accuracy @ ±300 AXAAccuracy @ ±600 A

DHAB S/159 Channel 2: Absolute Accuracy X (A)Absolute accuracy (A)

25.00

20.00

15.00

10.00

5.00

0.00

-40

-200

20

40

60

80

100

120

140

Temperature (°C)
Accuracy @ 0 A

Accuracy @ ±300A

Accuracy @ ±600A

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DHAB S/159
PERFORMANCES PARAMETERS DEFINITIONS

Sensitivity:

Primary current definition:

The transducer’s sensitivity G is the slope of the straight line

Vout

Vout = f (IP), it must establish the relation:
Primary current nominal (IP N)
Primary current, measuring range (IP M)

Vout (IP) = UC/5 (G × IP + VO)

Offset with temperature:
I [A]

IT90 %IP

VoutIPtr

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]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 offset drift TCIOE AV is the IO T value divided by the temperature
range.

Sensitivity with temperature:

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

The error of the sensitivity in the operating temperature is therelative variation of sensitivity with the temperature consideredwith the initial offset at 25 °C.

Magnetic offset:

The sensitivity variation GT is the maximum variation (in ppm or%) of the sensitivity in the temperature range:

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

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

The sensitivity drift TCG AV is the GT value divided by thetemperature range. Deeper and detailed info available is ourLEM technical sales offices (www.lem.com).

Offset voltage @ IP = 0 A:
The offset voltage is the output voltage when the primary current
is zero. The ideal value of VO is UC/2. So, the difference of VO

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

GT = (Sensitivity max − Sensitivity min) / Sensitivity at 25 °C.

Non linearity example− UC/2 is called the total offset voltage error. This offset error
can be attributed to the electrical offset (due to the resolution ofthe 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).

Referencestraight line
Max linearity error

IPLinearity variation in IP N

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DHAB S/159
Environmental test specifications:

NameStandardConditions

Low temperature storage test

ISO 16750-4
IEC 60068-2-1

Low temperature operation test

ISO 16750-4
IEC 60068-2-1 Ad−40 °C, 240 h; power ON

HTOE (high temperature operating endurance test)

ISO 16750-4
IEC 60068-2-2 Bd

1000 h; power supply @ 125 °C

Powered thermal cycle endurance

IEC 60068-2-14 Nb−40 °C (20 min), +125 °C (20 min), 600 cycles ; offset
monitored

Thermal shock

IEC 60068-2-14 Na−40 °C (20 min soak) / 125 °C (20 min soak) , 1000 cycles,with connectors => 667 h (28 days)

High temperature and humidity endurance

JESD22-A101

1000 H; 85 °C / 85 % HR; power ON; Monitored once a day

Salt fog

IEC 60068-2-11

96 h @ 35 °C , 5 % of salt water solution, characterization
before and after test only at 25 °C and UC nominal−40 °C, 240 h; no power supply

Mechanical tests
ISO 16750-3 § 4.1.2.4
mass suspended

Vibration in temperatureContinuous monitoring: offset

ShocksISO 16750-3§ 4.2

Power ON. Profile 1 (500 m∙s-2; 11 ms) 10 shocks per axe Halfsinusoidal pulse

Free Fall test

ISO 16750-3

3 axis, 2 directions by axis;1 sample per axis; 1 m. ; concretefloor

EMC test
B.C.I. (bulk current injection)

ISO 11452-4
Annex E.1.1, Table E.1

From 1 to 400 MHz.
Level 1: 60 mA; Functional class: A
Level 2: 100 mA; Functional class: A
Level 4: 200 mA; Functional class: B

Radiated electromagnetic immunity

ISO 11452-2
GMW 3097 (04.2012)
table 12 p.21 (level 2)

Level: 100 V/m (rms); from 400 M to 1 GHz Functional class: A
Level: 70 V/m (rms) from 1 G to 2 GHz Functional class: AEmission

CISPR 25

IEC 61000-4-2 +ISO 10605(07/2008)

E.S.D. not supplied

Table 9, Class 5 by default
Freq = 150 kHz to 2.5 GHz
Contact discharge: ±4 kV & ± 8 kV
Air discharge: ±15 kV
Functionnal class: A after reconnection(150 pF, 330 Ω)Connector tests
Connector to connector engagement force

GMW 3191 § 4.11

Locked connector disengagement force

GMW 3191 § 4.13

Unlocked connector disengagement force

GMW 3191 § 4.14

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