VCS1625Z (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS in inches (millimeters)
Solder Pad Layout
Electrical
L
H
W
Mountin g
Pads (4)
I1
I2
A
E1
E2
B
0.070
(1.78)
Schematic
I 1 E 1
R
E 2
I 2
Top View
Bottom View
INCHES
0.260
(6.60)
MILLIMETERS
L
H
W
A
B
0.250 ± 0.010
0.160 ± 0.010
0.040 maximum
0.080 ± 0.005
0.040 ± 0.010
6.35 ± 0.25
4.06 ± 0.25
1.02 maximum
2.03 ± 0.13
1.02 ± 0.25
FIGURE 3 - TRIMMING TO VALUES
FIGURE 4 - TYPICAL TCR CURVE Z-FOIL
(Conceptual Illustration)
+ 500
+ 400
+ 300
Δ R
- 100
Interloop Capacitance
Red u ction in Series
M u t u al Ind u ctance
Red u ction d u e
to Opposing
C u rrent in
Adjacent Lines
C u rrent Path
Before Trimming
C u rrent Path
After Trimming
Trimming Process
Remo v es this Material
from Shorting Strip Area
Changing C u rrent Path
and Increasing
Resistance
+ 200
+ 100
R 0
(ppm)
- 200
- 300
- 400
- 500
0.05 ppm/°C
- 0.1 ppm/°C 0.1 ppm/°C
0.14 ppm/°C
- 0.16 ppm/°C 0.2 ppm/°C
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
Ambient Temperature (°C)
Note: Foil sho w n in b lack, etched spaces in w hite
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
Thermal shock 5 x (- 65 °C to + 150 °C)
Low temperature operation
Short time overload
High temperature exposure
Resistance to soldering heat
Moisture resistance
Load life 2000 h at 70 °C: rated power on ceramic PCB
MIL-PRF-55342
? R LIMITS
± 0.10 %
± 0.10 %
± 0.10 %
± 0.10 %
± 0.2 %
± 0.2 %
± 0.5 %
TYPICAL
? R LIMITS
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
MAXIMUM
? R LIMITS (1)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.02 % (200 ppm)
± 0.03 % (300 ppm)
± 0.03 % (300 ppm)
± 0.04 % (400 ppm)
Note
(1) Measurement error 0.001R
www.foilresistors.com
2
For any questions, contact: foil@vishaypg.com
Document Number: 63094
Revision: 23-Mar-10
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