VISHAY VFC1206 Technical data

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High Precision Flip Chip,

Patents Pending (Industrialized Countries)

Product may not

be to scale

The VFC1206 is a surface mountable flip chip resistor that utilizes Ultra Precision Bulk Metal from other Vishay Bulk Metal as much as it is installed with the foil side facing the providing better power handling capabilities. The Foil element is isolated from the PCB by a This overcoating plus the overall product design isolates the resistor from handling and installation stresses. The temperature coefficient of resistance (TCR) curve shown below compares the new revolutionary “Z” Foil with its TCR of < 0.5ppm/°C to the original Vishay “C” Foil. The Bulk Metal Foil characteristics of excellent long term stability, low noise and availability of tight tolerance are maintained in this Flip Chip configuration. The VFC1206 is available in any value within the specified resistance range. The flip chip configuration is more economical for high volume, anolog applications where high precision is required.

“Z” Foil. This product differs

Foil surface mount devices in

protective overcoating.

PCB

VFC1206

Vishay Foil Resistors

FEATURES

• Nominal TCR: 0.5ppm/°C (- 55°C to + 125°C)

• Resistance Range: 10Ω to 30K

• Tolerance: to ± 0.01%

• Load Life Stability: ± 0.01% maximum ∆R under full rated power at + 70°C for 2000 hours

• Shelf Life Stability: 50ppm (0.005%) over several years

• Voltage Coefficient: < 0.00001%/volt (< 0.1ppm/V)

• Current Noise: < 0.010µV (rms)/volt of applied voltage

• Non Inductive: < 0.08µH

TABLE 1 - RESISTANCE VALUE VS

TOLERANCE AND TCR

VALUE STANDARD MAXIMUM

Ω TOLERANCE (%)* TCR**

100Ω to 30K ± 0.01% ± 2.0ppm/°C

50Ω to < 100Ω± 0.05 ± 3.0ppm/°C

25Ω to < 50Ω± 0.1 ± 4.0ppm/°C

10Ω to < 25Ω± 0.25 ± 5.0ppm/°C

*Tighter tolerances are available. Please contact Application Engineering. **Range: - 55°C to + 125°C, + 25°C reference

FIGURE 1 - NOMINAL TCR

COMPARISON OF Z FOIL TO C FOIL

+ 150

+ 100

+ 50

∆R

(PPM)

- 50

- 100

- 150

- 200

- 50 - 25 0 + 25 + 50 + 75 + 100 + 125

- 55

The TCR for values < 100Ω are influenced by the termination composition and result in a deviation from this curve.

VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31

Document Number: 63084 Revision 03-Jul-02

• GERMANY +49.9287.710 FAX: +49 9287.70435

• ISRAEL +972.3.557.0945 FAX: +972.3.558.9121

Ambient Temperature (°C)

C Alloy 2PPM/°C

Z Alloy 0.5PPM/°C

< 0.5PPM/°C Z Alloy

< 2PPM/°C C Alloy

• ITALY + 39.2.300.11919 FAX: +39.2.300.11999

• JAPAN +81.42.729.0661 FAX: +81.42.729.3400

• SINGAPORE +65.788.6668 FAX: +65.788.0988

TABLE 2 - TYPICAL PERFORMANCE SPECIFICATIONS

TEST MIL-PRF-55342 VFC1206

CHARACTERISTIC E MAXIMUM

∆R LIMITS* ∆R LIMITS**

Temperature Coefficient of Resistance

Thermal Shock ± 0.10% ± 0.02% Low Temperature Operation ± 0.10% ± 0.02% Short Time Overload ± 0.10% ± 0.02% High Temperature Exposure ± 0.10% ± 0.03% Resistance to Bonding ± 0.20% ± 0.02% Moisture Resistance ± 0.20% ± 0.03% Life 2000hrs at + 70°C ± 0.50% ± 0.01%

NOTES:

* As shown + 0.01Ω to allow for measurement error. **As shown + 0.01Ω to allow for measurement error for values less than 100Ω.

• SWEDEN +46.8.594.70590 FAX: +46.8.594.70581

• UK +44 191 514 8237 FAX: +44 1953 457 722

• USA +1 610 407-4800 FAX: +1 610 640-9081

± 25ppm/°C See Table 1

www.vishay.com

VFC1206

Vishay Foil Resistors

Bulk Metal® Foil Technology

High Precision Flip Chip, Patent Pending

FIGURE 2 - POWER DERATING CURVE

–55°C

125

100

Percent of Rated Power

-75 –50 –25 0 +25 +50 +75 +100 +125 +150 +175

Ambient Temperature (°C)

+70°C

Rated Power

FIGURE 4 - DIMENSIONS AND LAND PATTERN in inches (millimeters)

Bottom View (Showing Terminals for Mounting):

Solder Terminal (2)

FIGURE 3 - CHIP CONFIGURATION

Protective Coating

Land Pattern

High Purity Alumina Substrate

Resistive Bulk Metal® Foil

Solder

L - 0.003 (0.08)

CHIP L W THICKNESS D W1 Z G X SIZE ± 0.005 (0.13) ± 0.005 (0.13) MAXIMUM ± 0.003 (0.08) ± 0.003 (0.08) ± 0.003 (0.08) ± 0.003 (0.08) ± 0.003 (0.08)

1206

0.126 0.062 0.025 0.015 0.059 0.126 0.090 0.062

(3.20) (1.57) (0.64) (0.38) (1.50) (3.20) (2.29) (1.57)

TABLE 3 - PROPERTIES

RESISTANCE POWER MAXIMUM MAXIMUM

RANGE + 70°C VOLTAGE WEIGHT

(Ω) (mW) (V) (mg)

10R - 30K 125 61 10.3

TABLE 4 - ORDERING INFORMATION

MODEL CHIP SIZE RESISTANCE VALUE TOLERANCE TERMINATION PACKAGING

VFC 1206 RESISTANCE LETTER MULTIPLIER T ± 0.01% B - solderable T = Tape and

RANGE DESIGNATOR FACTOR Q ± 0.02% Reel

A ± 0.05% W = Waffle Pack

10Ω to <1KΩ R x 1.0 B ± 0.1%

Example: 249R00 = 249Ω C ± 0.25%

1K to 30K K x 10

Example: 10K000 = 10.0KΩ

D ± 0.5% F ± 1.0%

Patent Pending