CAS 6-NP LEM USA Inc, CAS 6-NP Datasheet - Page 13

• Manufacturer Part Number: CAS 6-NP
• Description: SENSOR CURRENT 6A 5V MOD
• Manufacturer: LEM USA Inc
• Series: CASr

Specifications of CAS 6-NP

• Featured Product: CAS Series
• Current - Sensing: 6A
• Accuracy: ±0.8%
• Sensitivity: 104.2mV/A
• Current - Supply: -
• Sensor Type: Flux Gate
• Voltage - Supply: 4.75 V ~ 5.25 V
• Output: 0 ~ 5 VDC
• Frequency: 300kHz
• Response Time: 300ns
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 398-1087-5

100526/5
Electrical offset
The electrical offset voltage V
the ferro-magnetic parts of the transducer are:
●
●
Using the current cycle shown in figure 30, the electrical offset
is:
The temperature variation
V
considered temperature:
Note: the transducer has to be demagnetized prior to the
application of the current cycle (for example with a
demagnetization tunnel).
Overall accuracy
The overall accuracy at 25°C X
range, relative to the rated value I
It includes:
●
●
●
The magnetic offset is part of the overall accuracy. It is
taken into account in the linearity error figure provided the
transducer has not been magnetized by a current higher than
I
Filtering and decoupling
Supply voltage V
The fluxgate oscillator draws current pulses of up to 30 mA
at a rate of ca. 900 kHz. Significant 900 kHz voltage ripple
on V
these frequencies the power supply rejection ratio is low, and
the ripple may appear on the transducer output V
reference V
capacitors, but in the case of a power supply with high
impedance, it is advised to provide local decoupling (100 nF
or more, located close to the transducer).
PN
OE
.
completely demagnetized, which is difficult to realize,
or in a known magnetization state, like in the current cycle
shown in figure 30.
the electrical offset
the sensitivity error
the linearity error
is the variation of the electrical offset from 25°C to the
C
can indicate a power supply with high impedance. At
REF
. The transducer has internal decoupling
V
V
ε
OE
OT
L
V
ε
(
=
T
(to I
OE
G
C
V
Performance parameters definition (continued)
)
OUT
=
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
V
PN
V
(
OT
t
OE
)
1
OE
)
of the electrical offset voltage
(
G
+
2
T
can either be measured when
V
is the error in the - I
)
PN
OUT
−
.
V
(
t
OE
2
)
(
25
°
C
Application information
)
PN
OUT
.. + I
and
PN
Response and reaction times
The response time tr and the reaction time tra are shown in
figure 31.
Both depend on the primary current di/dt. They are measured
at nominal ampere-turns.
Figure 31: Response time t
Figure 32: Test connection
Output V
The output V
typically 2 Ohms; it can drive 100 pF directly. Adding series
Rf = 100 Ohms allows much larger capacitive loads. Empirical
evaluation may be necessary to obtain optimum results.
The minimum load resistance on V
100 %
10 %
90 %
I
p
OUT
I
OUT
t
has a very low output impedance of
ra
t
r
r
and reaction time t
V
OUT
OUT
is 1 kOhm.
CAS series
ra
t
www.lem.com
Page 13/15