VFC2512
Vishay Foil Resistors
High Precision Flip Chip,
Patents Pending (Industrialized Countries)
FEATURES
• High Precision: Tolerance to
±
0.01% (see table 1)
• Low Temperature Coefficient of Resistance.
Nominal TCR: 0.5ppm/°C (- 55°C to + 125°C)
• Resistance Range: 10Ω to 100KΩ
• Load Life Stability:
±
0.01% maximum
∆R
under full
rated power at + 70°C for 2000 hours
• Shelf Life Stability: 50ppm/year (0.005%) maximum
∆R
non-hermetically sealed
• Power Rating at + 70°C: 750mW
• Maximum Weight: 35 mg
• Voltage Coefficient: < 0.00001%/volt (< 0.1ppm/V)
• Current Noise: < 0.01µV (rms)/volt of applied voltage
• Non Inductive: < 0.08µH
• Terminal Finishes Available:
Lead (Pb)-free (Sn 99.3% Cu 0.7%)
Tin/Lead Alloy (Sn 62% Pb 36% Ag 2%)
Product may not
be to scale
VFC2512 is a Precision Surface Mount Flip Chip Resistor
that utilizes Ultra Precision Bulk Metal
®
“Z” Foil (BMZF) for
the resistive element. This product differs from other Vishay
Bulk Metal
®
Foil surface mount devices in as much as it is
installed with the foil side facing the PCB. The Foil element
is isolated from the PCB by a protective overcoating. This
overcoating plus the overall product design isolates the
resistor from handling and installation stresses.
The flip chip configuration is providing space saving on the
PCB and is more economical for high volume, analog
applications where high precision is required.
The BMZF technology provides inherently an extremely low
and predictable Temperature Coefficient of Resistance
(TCR), remarkable load life stability, low noise and availability
of tight tolerance.
The TCR is a process capability not a selection process and
for most of the range is independant of ohmic value and lot
varied relations. The TCR curve on Fig.1 demonstrates the
new revolutionary Z Foil with its TCR nominal of 0.5ppm/°C.
A voltage divider can be fashioned by using two arbitrarily
selected VFC2512s with a resultant tracking specification of
< 3ppm/°C. Extremely low tracking of < 1ppm/°C can be
supplied upon request.
The availability of tight absolute tolerance provides a good
cost solution for the variability of other components when
compiling the total error budget. BMZF offers the best
stability available; and is an order of magnitude better than
thin film technology. The noise generated by the resistor is
non measurable and its design and construction make it well
suited for high frequency applications.
TABLE 1 - TOLERANCE AND TCR VS
RESISTANCE VALUE
VALUE
Ω
100Ω to 100KΩ
50Ω to < 100Ω
25Ω to < 50Ω
STANDARD
TOLERANCE (%)*
±
0.01
±
0.05
±
0.1
MAXIMUM
TCR**
±
2.0ppm/°C
±
3.0ppm/°C
±
3.0ppm/°C
10Ω to < 25Ω
±
0.25
±
4.0ppm/°C
* Tighter tolerances are available. Please contact Vishay Application
Engineering.
**Over MIL range: (- 55°C to +125°C, + 25°C reference)
TABLE 2 - ENVIRONMENAL
PERFORMANCE SPECIFICATIONS
TEST
MIL-PRF-55342
VFC2512
CHARACTERISTIC E MAXIMUM
∆
R LIMITS*
∆
R LIMITS**
±
25ppm/°C
±
0.10%
±
0.10%
±
0.10%
±
0.10%
±
0.20%
±
0.20%
±
0.50%
(P x R) (1/2)
See Table 1
±
0.02%
±
0.02%
±
0.02%
±
0.03%
±
0.02%
±
0.03%
±
0.01%
FIGURE 1 - NOMINAL TCR Z FOIL
Z Foil 0.5PPM/
°
C
+ 150
+ 100
∆R
R
(PPM)
+ 50
0
- 50
- 100
- 150
- 200
- 50
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Temperature Coefficient of
Resistance
Thermal Shock
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Bonding
Moisture Resistance
Life 2000hrs at + 70
°
C
Maximum Working Voltage
Ambient Temperature (
°
C)
The TCR for values < 100Ω are influenced by the termination
composition and result in a deviation from this curve.
NOTES:
* As shown + 0.01Ω to allow for measurement error.
** As shown + 0.01Ω to allow for measurement error for values less
than 100Ω.
SALES
• ISRAEL: foilsales.israel@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDANAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA:foilsales.eucentral@vishay.com
For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63091
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 13-Aug-04
www.vishay.com
N1
VFC2512
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
High Precision Flip Chip, Patent Pending
FIGURE 3 - CHIP CONFIGURATION
High Purity Alumina
Substrate
Resistive
Bulk Metal
®
Foil
Solder
25
0
-75
FIGURE 2 - POWER DERATING CURVE
Percent of Rated Power
125
100
75
50
–55°C
+70°C
Rated Power
–50
–25
0
+25
+50
+75
+100 +125 +150 +175
Ambient Temperature (°C)
Protective
Coating
FIGURE 4 - DIMENSIONS AND LAND PATTERN
in inches (millimeters)
Bottom View (Showing Terminals for Mounting):
Solder Terminal (2)
D
Land Pattern
W
W1
G
X
L - 0.003 (0.08)
L
CHIP
SIZE
2512
L
±
0.005 (0.13)
0.250
(6.35)
W
±
0.005 (0.13)
0.125
(3.18)
THICKNESS
MAXIMUM
0.025
(0.64)
D
±
0.003 (0.08)
0.024
(0.61)
W1
±
0.003 (0.08)
0.123
(3.12)
Z
Z
±
0.003 (0.08)
0.250
(6.35)
G
X
±
0.003 (0.08)
±
0.003 (0.08)
0.196
(4.98)
0.126
(3.20)
TABLE 3 - ORDERING INFORMATION
MODEL
VFC
CHIP SIZE
2512
RESISTANCE
RANGE
RESISTANCE VALUE
LETTER
DESIGNATOR
MULTIPLIER
FACTOR
x 1.0
x 10
3
TOLERANCE
T
±
0.01%
Q
±
0.02%
A
±
0.05%
B
±
0.1%
C
±
0.25%
D
±
0.5%
F
±
1.0%
TERMINATION
PACKAGING
S
- Lead (Pb)-free
T
= Tape and
B
- Tin/Lead
Reel
W
= Waffle Pack
10Ω to <1KΩ
R
Example: 249R00 = 249Ω
1K to 100K
K
Example: 10K000 = 10.0KΩ
Patent Pending
SALES
• ISRAEL: foilsales.israel@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDANAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA:foilsales.eucentral@vishay.com
www.vishay.com
N2
For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63091
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 13-Aug-04
Microcontroller MCU
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