Ohmite LVK20R005FER Four terminal high precision current sense Datasheet

LVK Series
L
Four Terminal High
Precision Current Sense
LVK25
(2 watt)
W
LVK 12, LVK20, LVK24
(0.5, 0.75 & 1 watt)
L
2
W
t
a
4
t
a
b
1
Pkg.
Series Size
LVK12 1206
LVK20 2010
LVK24 2412
Power
Rating
(W @70°C)
0.5W
0.75W
1.0W
LVK25 1224
2.0W
Resistance
Range
(Ω)
0.01-0.05
0.01-0.05
0.01-0.05
0.001
0.002-0.004
0.005-0.01
b
1. Electrode
2. Protection
coat
3. Almina
substrate
4. Resistor
3
TCR
(ppm/°C)
50ppm
50ppm
50ppm
300ppm
200ppm
100ppm
Available
Tolerance Values
0.5%, 1% E12
0.5%, 1% E12
0.5%, 1% E12
1, 2, 3, 4,
1%
5, 6, 7, 8,
9, 10 mΩ
Current sense resistors enable
the measurement of current
flow in a circuit by monitoring
a voltage drop across a precisely calibrated resistance.
The LVK chip features four
terminals, also known as a
“Kelvin” configuration. This
configuration enables current
to be applied through two
opposite terminals and a sensing voltage to be measured
across the other two terminals,
eliminating the resistance and
temperature coefficient of the
terminals for a more accurate
current measurement.
Isolating the voltage
and current terminals (see
schematic) facilitates a very
accurate current measurement. Ohmite’s proprietary
technology offers an excellent
Temperature Coefficient of
Resistance (TCR) even for
very low resistance values.
The resistive element consists
of a durable, anti-corrosive
metal alloy that combines
reliable performance with the
ability to withstand harsh environments.
L
3.2 ±0.2
5.0 ±0.2
6.4 ±0.2
3.2 ±0.2
W
1.6 ±0.2
2.5 ±0.2
3.2 ±0.2
6.4 ±0.2
t
0.5 ±0.15
0.5 ±0.15
0.5 ±0.15
0.5 ±0.2
b
0.55 ±0.2
0.9 ±0.2
1.2 ±0.2
2.7 ±0.2
�
Series
LVK12
LVK20
LVK24
LVK25
W
�
L
1.75
2.55
3.25
1.40
W
1.10
1.55
1.90
3.30
A
1.00
1.40
2.00
2.20
B
B
0.30
0.50
0.60
1.00
W
�
�
�
�
B
Reel (mm)
2mm ±0.5
13mm ±0.3 (LVK12)
15mm ±0.3 (LVK 20, 24, 25)
13mm ± 0.2
180mm ±3
sch e m at i c
V
V
I
I
V = sensing terminal
(voltage)
I = current terminal
LVK25R005FER
Series
Case Size
12 = 1206
20 = 2010
24 = 2412
25 = 1224
Tolerance Taping Code
Ohms
R005 = 0.005 D = 0.5% R = 1,000 pc/reel
F = 1%
Sta n d ar d v a l u e s
L
�
Resistance Range:
0.001Ω - 0.05Ω
Operating Temperature Range:
-40°C to +125°C
Rated Ambient Temperature:
+70°C
Resistance Tolerance:
0.5% and 1% standard
Temperature Coefficient:
LVK12, LVK20, LVK24: 50ppm
standard
LVK25: 100ppm, 200ppm, or
300ppm based on resistance
value
Terminals: 100% matte tin
Check product availability at www.ohmite.com
LVK25 (1224)
A
L
�
S p e c i f i cat i o n s
RoHS Compliant
a
1.0 ±0.2
1.7 ±0.2
2.1 ±0.2
0.4 ±0.2
l a n d P att e r n ( m m )
LVK12 (1206)
LVK20 (2010)
LVK24 (2412)
A
• Designed for automatic insertion
• Industry standard sizes
• High-precision kelvin connect
capability in a small package
O R DE R IN G IN F O R M A T ION
dimensions (mm)
Size
LVK12 (1206)
LVK20 (2010)
LVK24 (2412)
LVK25 (1224)
F e at u r e s
LVK12 LVK20 LVK24 LVK25
1% Tolerance
0.01
0.01 0.01 0.001
0.012
0.012 0.002
0.015 0.015 0.003
0.005
0.02
0.02 0.02
0.024 0.027
0.03
0.03 0.03 0.01
0.039
0.039
0.047
0.047
0.05
0.05 0.05
0.5% Tolerance
0.01
0.01 0.01
0.02
0.02 0.02
0.03
0.03 0.03
0.05
0.05 0.05
60mm ±1
9mm ±0.3 (LVK12)
13mm ±0.3 (LVK 20, 24, 25)
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected]
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