VSMP2018 Vishay, VSMP2018 Datasheet - Page 2

• Manufacturer Part Number: VSMP2018
• Description: Ultra High Precision Foil Wraparound Surface Mount Chip Resistor With Temperature Coefficient Of Resistance Tcr Of ? 0.05 Ppm/?c, And Load Life Stability Of ? 0.005 % 50 Ppm
• Manufacturer: Vishay

VSMP2018 (Z-Foil)
Vishay Foil Resistors
Note
(1)
Note
(1)
www.vishay.com
2
Interloop Capacitance
Reduction in Series
FIGURE 2 - TRIMMING TO VALUES
TABLE 2 - DIMENSIONS AND LAND PATTERN in inches (millimeters)
TABLE 3 - SPECIFICATIONS
CHIP
SIZE
2018
TABLE 4 - PERFORMANCES
Thermal Shock, 100 x (- 65 °C to + 150 °C)
Low Temperature Operation, - 65 °C, 45 min at 0.75 W
Short Time Overload, 6.25 x 0.75 W, 5 s
High Temperature Exposure, 150 °C, 100 h
Resistance to Soldering Heat
Moisture Resistance
Load Life Stability, + 70 °C for 2000 h at Rated Power
Land pattern dimensions are per IPC-7351A.
As shown + 0.01 Ω to allow for measurement errors at low values.
Mutual Inductance
Reduction due
to Change in
Current Direction
CHIP
SIZE
2018
(CONDITIONS PER MIL-PRF-55342)
(Conceptual Illustration)
± 0.005 (0.13)
T
Note: Foil shown in black, etched spaces in white
Uncoated
0.204 (5.18)
Ceramic
RATED POWER (mW)
L
TEST
at + 70 °C
Bottom View for Mounting
750
D
± 0.005 (0.13)
0.184 (4.67)
After Trimming
Current Path
W
L
For any questions, contact:
from Shorting Strip Area
Changing Current Path
Removes this Material
Trimming Process
and Increasing
Resistance
Before Trimming
MAX. WORKING
Current Path
W
THICKNESS
0.025 (0.64)
MAXIMUM
VOLTAGE
≤
CHARACTERISTIC E ΔR LIMITS
P R
×
MIL-PRF-55342
± 0.005 (0.13)
± 0.1 %
± 0.1 %
± 0.1 %
± 0.1 %
± 0.2 %
± 0.2 %
± 0.5 %
0.018 (0.46)
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Note
• The TCR values for < 100 Ω are influenced by the termination
FIGURE 3 - TYPICAL RESISTANCE/
composition and result in deviation from this curve.
(ppm)
D
ΔR
R
Recommended Land Pattern
+ 500
+ 400
+ 300
+ 200
+ 100
RESISTANCE RANGE
Z
- 100
- 200
- 300
- 400
- 500
0
G
10 to 20K
- 55
0.248 (6.30)
TCR Chord Slopes for Different Temperature Ranges
(Ω)
TEMPERATURE CURVE
Z
- 0.16 ppm/°C
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
- 25
(1)
- 0.1 ppm/°C
Ambient Temperature (°C) and
ΔR LIMITS
TYPICAL
0
X
0.05 ppm/°C
0.146 (3.71)
+ 25
Footprint
0.1 ppm/°C
G
(1)
Document Number: 63142
0.14 ppm/°C
+ 60 + 75
MAXIMUM WEIGHT
0.2 ppm/°C
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.01 % (100 ppm)
Revision: 30-Mar-09
ΔR LIMITS
MAXIMUM
(mg)
40
0.184 (4.67)
+ 100 + 125
X
(1)
(1)