Document Number: 63063

Revision 12-Dec-05

www.vishay.com

78

VHZ Hermetic

Vishay Foil Resistors

For technical questions, contact: foil@vishay.com

SALES

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TEMPERATURE COEFFICIENT OF RESISTANCE

Nominal TCR

VH102Z

Maximum TCR (- 55°C to + 125°C, + 25°C - ref)

VHZ555

Maximum TCR (- 55°C to + 125°C, + 25°C - ref)

Selected

(closest spread)

Stability

9

Load Life at 2,000 hours.

Load Life at 10,000 hours.

Shelf Life Stability

Current Noise

High Frequency Operation

Rise/Decay Time

Inductance (L)

10

Capacitance (C)

Voltage Coefficient

Thermal EMF

12

Hermeticity

0.2ppm/°C

± 0.8ppm/°C

± 3ppm/°C for values 4R99 to 25R

± 2.5ppm/°C for values 25R to 80R

± 2ppm/°C for values > 80R

0.5ppm/°C

VH102Z

VHZ555

± 0.025%

± 0.015%

at 0.3W/+ 125°C

± 0.005%

± 0.0025

at 0.1W/+ 80°C

± 0.02%

± 0.01%

at 0.05W/+ 125°C

± 5ppm

(0.0005%)

Maximum ∆R after 1 year

±10ppm

(0.001%)

Maximum ∆R after 3 years

< 0.010µV (RMS)/Volt of applied voltage (– 40dB)

1.0 ns at 1KΩ

0.1µH maximum; 0.08µH typical

1.0pF maximum; 0.5pF typical

< 0.1ppm/V

11

0.1µV/°C Maximum; 0.05µV/°C Typical 1µV/watt

10

Bulk Metal

Hermetically Sealed Resistors, Aerospace

TABLE 2 - “HZ” SERIES SPECIFICATIONS

5

The TCR is obtained by the process capability and

does not rely on a selection process. It does not

vary from lot to lot nor by ohmic values.

+100

+50

0

-50

-100

-50

-25

0

+25

-55

+50

+75

+100 +125

R

R

(PPM)

0.2PPM/°C