Y402412K7560T9R Datasheet, PDF (5/7 Pages) Vishay Siliconix – Z-1 Foil Ultra High Precision Wrap-around Chip Resistor

FRSM Series of Precision Chip Resistors
Vishay Foil Resistors
TEST DESCRIPTION
By using a electrolytic 500 pF capacitor charged up to 4500 V,
pulses were performed on 10 units of 1206, 10KΩ of three different
Surface Mount Chip Resistors technologies, with an initial voltage
spike of 2500 V (Figure 7). The unit was allowed time to cool down,
after which the resistance measurement was taken and displayed in
ppm deviation from the initial reading. Readings were then taken in
500 V increments up to 4500 V.
TEST RESULTS
FIGURE 7 - ESD TEST DESCRIPTION
2500 V to 4500 V
1 MΩ
500 pF
Rx
POWER COEFFICIENT OF RESISTANCE
(PCR)
In precision resistors with low TCR, the self heating (Joule effect)
causes the resistor not to perform strictly to its TCR specifications.
This inaccuracy will result in an error at the end in the resistance
value under applied power. Vishay Foil Resistors introduced a new
concept of Power Coefficient of Resistance (PCR) along with a new
Z-Foil technology which leads to reduction of the sensitivity of
precision resistor to ambient temperature variations and changes of
applied power.
Figure 9 represents PCR behavior of three different resistor
technologies under applied power.
FIGURE 9 - BEHAVIOR OF THREE
DIFFERENT RESISTOR
TECHNOLOGIES UNDER
APPLIED POWER (POWER
COEFFICIENT TEST)
0.1
0.2
0.3
+ 100 ppm
Thick Film
Surface
Mount Chip
0.4
0.5
Thin Film
Surface
Mount Chip
DMM
TABLE 6 - ESD TEST RESULTS
VOLTS
THICK FILM
∆R (%)
THIN FILM
2500
-2.7
97
3000
-4.2
366
3500
-6.2
>5000
4000
-7.4
>5000
4500
-8.6
OPEN
FOIL
<0.005
<0.005
<0.005
<0.005
<0.005
0 ppm
- 100 ppm
Note: Size 1206, value: 1K
Applied power, (W)
Z-Foil
Surface
Mount Chip
FIGURE 10 - CURRENT PATH IN A
RESISTIVE ALLOY
FIGURE 8 - LOAD LIFE TEST FOR
2000 HRS @ +70°C
AT RATED POWER
100
80
60
40
20
0
-20 ⁰
-40
-60
-80
-100
250 500 750 1000 1250 1500 1750 2000 2250
Time (hrs)
0805-1K
0805-8K
1206-1K
1206-25K
2512-75K
2512-125K
Noise generation is minimal when current
flow is through multiple paths as exists in
Bulk Metal^® Foil resistive alloy.
Document Number: 63209
Revision: 7-Apr-11
For any questions, contact: [e-mail]
www.vishayfoilresistors.com
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