VSH, VSC

Precision Resistor with Tight Tolerance from ± 0.01 % and Load

Life Stability of ± 0.01 % and Instantaneous Thermal Stabilization

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63087

2

Revision: 27-Aug-08

TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (- 55 °C to + 125 °C, + 25 °C Ref.)

RESISTOR

RESISTANCE VALUE

(

Ω)

TYPICAL TCR AND MAX. SPREAD

(ppm/°C)

TOLERANCE

(%)

VSH2

VSC2

60K to 120K

± 2 ± 4.5

± 0.01 %

VSH1

VSC1

80 to < 60K

± 2 ± 4.5

± 0.01 %

VSH1

VSC1

50 to < 80

± 2 ± 5.5

± 0.02 %

VSH1

VSC1

5 to < 50

± 2 ± 6.5

± 0.05 %

TABLE 2 - PERFORMANCE SPECIFICATIONS

TEST

CONDITIONS

ΔR (%) - TYPICAL

ΔR (%) - MAXIMUM

Moisture Resistance

MIL-STD-202, method 106

± 0.005

± 0.03

Pressure Cooker Test

2 atmospheres absolute pressure,

121 °C, 100 % R.H. for 100 h

± 0.2

± 0.4

Short Time Overload

± 0.005

± 0.05

Resistance to Solder Heat

+ 260 °C, 20 s

± 0.01

± 0.03

Terminal Strength

2 lbs, 10 s

± 0.0025

± 0.03

Insulation Resistance

DC 100 V, 2 min

> 10 000M

> 10 000M

Dielectric Withstanding Voltage

AC 300 V, 1 min

± 0.0025

± 0.03

Thermal Shock

- 65 °C to + 150 °C, 5 cycles

± 0.01

± 0.02

Shock

MIL-STD-202, method 213, condition I

± 0.005

± 0.03

Vibration

MIL-STD-202, method 204, condition D

± 0.01

± 0.03

Load Life Stability

0.3 W, + 70 °C, 2000 h

± 0.01

± 0.015

Thermal EMF

-

0.07 µV/°C

0.1 µV/°C

Current Noise

Quan-Tech

- 42 dB

- 32 dB

Low Temperature Storage

24 h at - 65 °C

± 0.005

± 0.01

Low Temperature Operation

45 min at - 65 °C

± 0.005

± 0.01

High Temperature Exposure

+ 150 °C

± 0.01

± 0.03

FIGURE 2 - TRIMMING TO VALUES

(Conceptual Illustration)

Mutual Inductance

Reduction due

to Change in

Current Direction

Current Path

Before Trimming

Note: Foil shown in black, etched spaces in white

Interloop Capacitance

Reduction in Series

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing

Resistance

Current Path

After Trimming

FIGURE 3 - POWER DERATING CURVE

100

75

50

25

0

- 75

- 50

- 25

0

+ 25

+ 50

+ 75 + 100 + 125 + 150 + 175

Ambient Temperature (°C)

+ 70 °C