AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGY
HAH1BVW S/D02

Introduction

Automotive applications

The HAH1BVW family is for the electronic measurement ofDC, and low frequency current in high power and low voltage
automotive applications with galvanic separation between
the primary circuit (high power) and the secondary circuit(electronic circuit).

●● Battery Management.

The HAH1BVW family gives you the choice of having different
current measuring ranges in the same housing.

Features●● Ratiometric transducer●● Open Loop transducer using the Hall effect●● Low voltage application●● Unipolar +5 V DC power supply●● Primary current measuring range ±350 A (high range)

Principle of HAH1BVW Family
The open loop transducers uses a Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the Hallvoltage, 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 proportional
to:B (IP) = constant (a) × IP

The Hall voltage is thus expressed by:
VH = (Hall coefficient / d) × I × constant (a) × IP

With d = thickness of the Hall plates

I = current across the Hall plates
Except for IP, all terms of this equation are constant.
Therefore:
VH = constant (b) × IP

±60 A (low range)●● Maximum RMS primary admissible current: defined bybusbar to have T° < +150 °C

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

●● Operating temperature range: −40 °C < T° < 125 °C●● Output voltage: full ratio-metric (in sensitivity and offset).

Special feature●● Dual output.

Advantages●● Excellent accuracy

Fig. 1: Principle of the open loop transducer●● Very good linearity●● Very low thermal offset drift●● Very low thermal sensitivity drift●● Galvanic separation●● Non intrusive solution.
N° 97.K6.99.D02.0
11June2016/version 0

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HAH1BVW S/D02
Dimensions (in mm)

IPIPIPVoutUC

Mechanical characteristics

Remark●● Plastic case		PBT GF 30●● Vout > 2.5 when IP flows in the direction of the arrow.

●● Magnetic core		

Iron silicon alloy

System architecture (example)
RL > 10 kΩ optional resistor for signal line diagnostic●● Mass		
57 g (±5 %)Vout●● Electrical terminal coating Brass tin plated●● IP level		

IP ×2

Mounting recommendation●● Connector type		

AMP 1473672-1

Diagnostic

Open circuit

Vin = < 0.15 V

Short GND

Vin = < 0.15 VCL ≤ 100 nF EMC protection
RC Low pass filter EMC protection (optional)Electronic schematic

68 nF
100 nF
Vout Low range
UCVout High range
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HAH1BVW S/D02
Absolute ratings (not operating)Parameter

Specification
TypicalMax
14Symbol

Unit

UC

V

Maximum reverse supply voltage

UCV

−14

Maximum output voltage

Vout

V

−14

Maximum output current

IoutmA−10

10

Ambient storage temperature

TS°C

−40

125

Electrostatic discharge voltage (HBM)

Maximum supply voltage

Min14UESDkV8Maximum admissible vibration (random rms)γm⋅s-296.6

Rms voltage for AC insulation testUdkV2

Creepage distance

dCpmm

5.2Clearance

dCImm

4.9

Comparative tracking index

CTI

Operating characteristics in high/low range (IPN)

IPM

Primary current, measuring range, low range

IPN

A

−60

Supply voltage

UCV

4.5

Ambient operating temperature

TA°C

Output voltage

VoutV

SymbolPrimary current, measuring range, high range−40mV/A

5.71

mV/A

33.33

Offset voltage

VOV

2.5mV

1.22

Output clamping high voltage

VSZ

Output clamping low voltage

VSZ

Current consumption

ICmA

Load resistanceRLΚΩεrConditions

5.5125G

Ratiometricity error

50 Hz, 1 min

Vout = (UC/5) × (Vo + G × IP )GRout

10 to 2000 Hz, −40 °C to 125 °C

60
5Sensitivity high range

Output internal resistanceIEC 61000-4-2

Unit

Sensitivity low range
Output resolution

Vout Reverse / Forward voltage

PLC3 (175 V − 250 V)

Specification
Min TypicalMax
Electrical Data
A−350350

Parameter

Conditions

4.74@ TA = 25 °C@ UC = 5 V

4.75
0.25

0.26

@ UC = 5 V@ TA = 25 °C, @ UC = 5 V

1420@ TA = 25 °C

10@ TA = 25 °C

1Ω10Performance Data%
±0.2

εG%

±1

Electrical offset current

IOE

mV±2.5@ TA = 25 °C,@ UC = 5 V

Magnetic offset voltage

VOM

mV±2

@ UC = 5 V, @ TA = 25 °C

Sensitivity error

εL%

Average temperature coefficient of VOE

TCVOE AVmV/°C±0.04

Average temperature coefficient of G

TCGAV%/°C±0.02

Linearity error@ TA = 25 °C

1−1tr

msFrequency bandwidthBWHzOutput voltage noise peak-peak

Vno ppmV

10Output rms voltage noiseVnomV

1.6

Step response time @ 70 %Power up time
Setting time after overloadts% of full scale1070@ −3 dBms1ms

10

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HAH1BVW S/D02
Channel 1 (±60 A) accuracy
2
1.8
1.6

Accuracy (A)1.4
1.2
Accuracy at +/- 60A

1Accuracy at 0 A

0.8

accuracy at +/- 30A0.60.40.20-60-40-20020406080100120

Temperature (°C)

Channel 2 (±350 A) accuracy
87Accuracy (A)

65Accuracy at +/- 350A

4Accuracy at +/- 175A

3Accuracy at 0A

2
10-60-40-200204060

80

100120Temperature (°C)

Channel 1 global error (A)Temperature (°C)

Accuracy at ±60 A

Accuracy at ±30 A

Accuracy at ±0 A

−40

1.7

1.35

0.95

25

10.7

0.42

105

1.9

1.45

0.95

Channel 2 global error (A)Temperature (°C)

Accuracy at ±350 A

Accuracy at ±175 A

Accuracy at ±0 A

−40

6.3

4

1.6525

4.73

1.25

105

7.35

4.55

1.75

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HAH1BVW S/D02
PERFORMANCES PARAMETERS DEFINITIONS

Offset with temperature:

Primary current definition:

I [A]

IT

90 %

Vout

Primary current nominal (IPN)
Primary current, measuring range (IPM)

VoutIPtrIP

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:
The output voltage noise is the result of the noise floor of theHall elements and the linear amplifier.
Magnetic offset:
The magnetic offset is the consequence of an over-current on
the primary side. It’s defined after an excursion of IPN.
Linearity:
The maximum positive or negative discrepancy with a reference
straight line Vout = f (IP).
Unit: linearity (%) expressed with full scale of IPN.

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

Non linearity examplet [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 IOT is a maximum variation the offset in thetemperature range:
IOT = IOE max − IOE min

The offset drift TCIOEAV is the IOT value divided by thetemperature range.
Sensitivity with temperature:
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 GT is the maximum variation (in ppm or%) of the sensitivity in the temperature range:
GT = (Sensitivity max − Sensitivity min) / Sensitivity at 25 °C.
The sensitivity drift TCGAV 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 ofVO − 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).
Environmental test specifications:
Refer to LEM GROUP test plan laboratory CO.11.11.515.0 with
“Tracking_Test Plan_Auto” sheet.

Referencestraight line
Max linearity error
IP

Linearity variation in IPN

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

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