Z202T25K454DB datasheet(2/4 Pages) VISHAY

Part #	Z202T25K454DB

Description	Ultra High Precision Z-Foil Miniature Resistor with TCR of ± 0.05 ppm/°C, PCR of 5 ppm at Rated Power and Tolerance to ± 0.01 %

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Manufacturer	VISHAY [Vishay Siliconix]

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Z202

Vishay Foil Resistors

Ultra High Precision Z-Foil Miniature Resistor with

TCR of ± 0.05 ppm/°C, PCR of 5 ppm at Rated Power

and Tolerance to ± 0.01 %

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63131

2

Revision: 13-Nov-07

FIGURE 3 - TYPICAL TCR CURVE Z-FOIL

+ 500

+ 200

+ 100

0

- 100

- 200

- 300

- 500

- 55

- 25

+ 25

+ 60

+ 75

+ 100

+ 125

Ambient Temperature (°C)

ΔR

R

(ppm)

0

0.05 ppm/°C

- 0.1 ppm/°C

0.1 ppm/°C

0.14 ppm/°C

0.2 ppm/°C

- 0.16 ppm/°C

- 400

+ 300

+ 400

FIGURE 4 - 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

TABLE 2 - ENVIRONMENTAL PERFORMANCE COMPARISON

MIL-PRF-55182

CHAR J

VISHAY Z202

MAXIMUM

ΔR

TYPICAL

ΔR

Test Group I

Thermal shock (5 x - 65 °C to + 150 °C)

± 0.2 %

± 0.01 % (100 ppm)

± 0.005 % (50 ppm)

Short time overload (6.25 x Pnom x 5 s)

± 0.2 %

± 0.01 % (100 ppm)

± 0.005 % (50 ppm)

Test Group II

Resistance temperature characteristic

± 25 ppm/°C

See table 1

± 0.05 ppm/°C

(0 °C to + 60 °C)

Low temperature storage

± 0.15 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Low temperature operation

± 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 soldering heat

± 0.1 %

± 0.01 % (100 ppm)

± 0.005 % (50 ppm)

Moisture resistance

± 0.4 %

± 0.05 % (500 ppm)

± 0.01 % (100 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 0.125 W, 125 °C for 2000 h

± 0.5 %

± 0.025 % (250 ppm)

± 0.01 % (100 ppm)

Test Group Va

Life test at 0.25 W (2 x rated power), 70 °C for 2000 h

± 0.5 %

± 0.02 % (200 ppm)

± 0.01 % (100 ppm)

Test Group VI

High temperature exposure

± 2.0 %

± 0.1 % (1000 ppm)

± 0.05 % (500 ppm)

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