Document Number: 63146

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 06-May-08

3

VHP203 (Z-Foil)

Hermetically Sealed Miniature Ultra High Precision Z-Foil Technology

Resistors with TCR of 0.05 ppm/°C, Tolerance of ± 0.001 % and

Load Life Stability of ± 0.005 %, Unaffected by Humidity

Vishay Foil Resistors

Notes

1. Not to exceed power rating of resistor

2. 0.200" (5.08 mm) lead spacing available - specify VHP203J

3. Inductance (L) due mainly to the leads

4. The resolution limit of existing test equipment (within measurement capability of the equipment, or “essentially zero”)

5. µV/°C relates to EMF due to lead temperature difference and µV/W due to power applied to the resistor

6. Load life

ΔR max. can be reduced through in-house oriented processes

TABLE 3 - “H” SERIES SPECIFICATIONS

Load life at 2000 h

± 0.002 % maximum

ΔR at 0.1 W per chip and at + 60 °C

Shelf life

± 2 ppm (0.0002 %) after at least 10 years

Current Noise

< 0.010 µV (RMS)/V of applied voltage (- 40 dB)

High Frequency Operation

Rise time

1.0 ns without ringing

0.1 µH maximum; 0.08 µH typical

Capacitance (C)

1.0 pF maximum; 0.5 pF typical

Voltage Coefficient

0.1 µV/°C maximum; 0.05 µV/°C typical; 1 µV/W maximum

Hermeticity

TABLE 4 - ENVIRONMENTAL PERFORMANCE COMPARISON

MIL-PRF-55182

CHAR J

VHP203

MAXIMUM

ΔR

VHP203

TYPICAL

ΔR

Test Group I

Thermal shock, 5 x (- 55 °C to + 125 °C)

± 0.2 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Short time overload, 6.25 x rated power, 5 s

± 0.2 %

± 0.01 % (100 ppm)

± 0.003 % (30 ppm)

Test Group II

Resistance temperature characteristics

± 25 ppm/°C

table 1

± 0.05 ppm/°C

Characteristic

Low temperature storage (24 h at - 65 °C)

± 0.15 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Low temperature operation

(45 min, rated power at - 65 °C)

± 0.15 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Terminal strength

± 0.2 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Test Group III

DWV

± 0.15 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Resistance to solder heat, 20 s at + 260 °C

± 0.1 %

± 0.01 % (100 ppm)

± 0.005 % (50 ppm)

Moisture resistance

± 0.4 %

± 0.005 % (50 ppm)

± 0.001 % (10 ppm)

Test Group IV

Shock

± 0.2 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Vibration

± 0.2 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Test Group V

Life test at 0.3 W at + 25 °C

2000 h

± 0.5 %

± 0.008 % (80 ppm)

± 0.002 % (20 ppm)

Test Group Va

Life test at 0.1 W at + 60 °C

± 0.5 %

± 0.008 % (80 ppm)

± 0.002 % (20 ppm)

Test Group VI

High temperature exposure (2000 h at + 125 °C)

± 2.0 %

± 0.02 % (200 ppm)

± 0.005 % (50 ppm)

Test Group VII

Voltage coefficient

5 ppm/V

< 0.1 ppm/V

< 0.1 ppm/V