VFB1012D (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil BGA Surface Mount Voltage Divider
with 0.1 ppm/°C TCR Tracking, 0.01 % Tolerance Match
and Load Life Stability Ratio to ± 0.01 % (100 ppm)
FEATURES
Temperature coefficient of resistance (TCR):
absolute:
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
Tracking: 0.1 ppm/°C typical
Resistance range: 1K to 10K
Foil resistors are not restricted to standard values/ ratios,
we can supply specific “as required” values/ratios at no
extra cost or delivery (e.g 2K234/5K456)
Power coefficient tracking “R due to self heating”: 5 ppm
at rated power
Power rating: entire package: 0.2 W at 70 °C, divided
between the two resistors proportionally to their value
Resistance tolerance match: 0.01 %
Load life stability ratio: 0.01 % (0.2 W at 70 °C, 2000 h)
Large variety of resistance ratios: 1K to 10K
Electrostatic discharge (ESD) up to 25 000 V
Short time overload
0.01 % (100 ppm)
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: < - 40 dB
Thermal stabilization < 1 s
Voltage coefficient: < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Terminal (solder ball) available: lead (Pb)-free,
tin/lead alloy
Compliant to RoHS directive 2002/95/EC
Maximum working voltage for each element: 32 V
For better performances please contact us
INTRODUCTION
Bulk Metal
®
Z-foil technology out-performs all other resistor
technologies available today for applications that require
ultra-high precision and ultra-high stability. The Z-foil
technology provides a significant reduction of the resistive
element’s sensitivity to ambient temperature variations
(TCR) and to self heating when power is applied (power
coefficient).
Model VFB1012D offers low TCR (both absolute and
tracking), low PCR (both absolute and tracking), excellent
load life stability, tight tolerance, excellent ratio stability, and
low current noise, all in one package. 0.05 ppm/°C absolute
TCR removes errors due to temperature gradients.
The VFB1012D ball grid array (BGA) surface mount divider
provides tight tolerance matching and TCR tracking between
2 resistors simultaneously etched on one piece of foil on a
common substrate. The electrical specifications of this
integrated construction offers improved performances and
better real estate utilization over discrete resistors and
matched pairs.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
APPLICATIONS
Instrumentation amplifiers
Bridge networks
Differential amplifiers
Ratio arms in bridge circuits
Medical and test equipment
Military
Airborne etc.
R
2
R
1
-
+
V
in
V
out
VFB1012D
TABLE 1 - RANGE OF RESISTANCES
PARAMETER
Total resistance
Individual resistor
Ratio
R
1
+ R
2
R
1
or R
2
R
1
/R
2
FROM
2K
1K
1/10
TO
FIGURE 1 - SCHEMATIC
20K
10K
1/1
R
1
R
2
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63122
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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VFB1012D (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 3 - DERATING CURVE
PERCENT OF RATED POWER 100
%
= 0.2 W
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Percent of Rated Power
125
100
75
50
25
- 55 °C
+ 70 °C
Rated Power
Mutual Inductance
Reduction due
to Change in
Current Direction
0
- 75 - 50 - 25
0
25
50
75 100 125 150
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
TABLE 2 - RESISTANCE CHARACTERISTICS AND POPULAR RESISTANCE VALUES
VALUES
AVAILABLE
10K/10K
3K/3K
2K5/2K5
2K/2K
1K/1K
10K/5K
8K/4K
10K/4K
10K/2K5
10K/1K
RESISTANCE
VALUE CODE
V0001
V0256
V0257
V0059
V0004
V0082
V0258
V0259
V0246
V0071
2
2.5
4
10
1.0 ppm/°C
1.0 ppm/°C
± 0.02 %
0.02 %
1.0 ppm/°C
0.5 ppm/°C
± 0.01 %
0.01 %
1
1.0 ppm/°C
0.5 ppm/°C
± 0.01 %
0.01 %
RATIO
R
1
/R
2
TCR Max.
(- 55 °C to + 125 °C, + 25 °C Ref.)
ABSOLUTE
TRACKING
TIGHTEST TOLERANCE
(1)
ABSOLUTE
MATCHING
Note
(1)
Other available tolerances - see table 4
FIGURE 4 - TYPICAL TCR CURVE Z-FOIL
+ 500
+ 400
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
TABLE 3 - TYPICAL PERFORMANCE
SPECIFICATIONS PER MIL-PRF-55342
(1)
TEST
Thermal shock,
5 x (- 65 °C to + 150 °C)
Low temperature operation,
- 65 °C at P
nom.
45 min
R
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.05 %
(500 ppm)
0.01 %
(100 ppm)
RATIO
0.01 %
(100 ppm)
0.005 %
(50 ppm)
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.01 %
(100 ppm)
0.02 %
(200 ppm)
0.01 %
(100 ppm)
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
Short time overload,
6.25 x P
nom.
x 5 s
High temperature exposure,
100 h at + 150 °C
Resistance to soldering heat
per MIL-PRF-55342
Moisture resistance
MIL-STD-202, method 106
without load
Load life
(ratio stability),
+ 70 °C for 2000 h
Weight: 17 mg
(1)
Ambient Temperature (°C)
Note
As shown + 0.01
measurement error
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For any questions, contact:
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Document Number: 63122
Revision: 25-Mar-10
VFB1012D (Z-Foil)
Vishay Foil Resistors
FIGURE 5 - CHIP CONFIGURATION
High Purity Alumina
Substrate
Resistive Bulk
Metal Foil
Solder Ball
Protective
Coating
TABLE 4 - DIMENSIONS
in Inches (Millimeters)
Chip Dimensions
ØD
Recommended Solder Pad Dimensions
ØS
L
C1
C2
X
W
G
DIMENSIONS
in Inches (Millimeters)
L
0.122 ± 0.005
(3.10 ± 0.13)
W
0.102 ± 0.005
(2.59 ± 0.13)
D
0.020 ± 0.002
(0.51 ± 0.05)
C1
0.055 ± 0.003
(1.40 ± 0.08)
C2
0.075 ± 0.003
(1.91 ± 0.08)
THICKNESS
(with balls)
0.032 ± 0.003
(0.81 ± 0.08)
RECOMMENDED SOLDER PAD DIMENSIONS
in Inches (Millimeters)
X
0.075 (1.91)
G
0.055 (1.40)
S
0.018 (0.46)
Document Number: 63122
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
VFB1012D (Z-Foil)
Vishay Foil Resistors
TABLE 5 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y1683V0258QT9W (preferred part number format)
DENOTES PRECISION
Y
VCODE
(2)
RESISTANCE
VALUE CODE
TOLERANCE MATCH
T
= 0.01 %
Q
= 0.02 %
A
= 0.05 %
PACKAGING
R
= tape and reel
W
= waffle pack
Y
1
6
8
3
V
0
2
5
8
Q
T
9
W
PRODUCT CODE
1683
= VFB1012D
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.10 %
C
= ± 0.25 %
CHARACTERISTICS
(1)
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1683 V0258 Q T 9 W:
TYPE: VFB1012D
VALUES: 8K/4K
ABSOLUTE TOLERANCE: ± 0.02 %
TOLERANCE MATCH: 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: waffle pack
HISTORICAL PART NUMBER: VFB1012D 8K/4K Q T S W (will continue to be used)
VFB1012D
MODEL
8K/4K
RESISTANCE
VALUE
R
1
= 8 k
R
2
= 4 k
Q
ABSOLUTE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.10 %
C
= ± 0.25 %
T
TOLERANCE
MATCH
T
= 0.01 %
Q
= 0.02 %
A
= 0.05 %
S
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
W
PACKAGING
T
= tape and reel
W
= waffle pack
Notes
(1)
For non-standard requests, please contact application engineering
(2)
For list of value codes see table 2 (additional values are available on request).
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For any questions, contact:
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Document Number: 63122
Revision: 25-Mar-10
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
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behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase.
To the maximum extent permitted by applicable law, Vishay Precision Group
disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability,
including without limitation special, consequential or incidental damages, and (iii) any and all implied
warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications
and performance may vary over time. Statements regarding the suitability of products for certain types of
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properties described in the product specification is suitable for use in a particular application.
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Document No.: 63999
Revision: 27-Apr-11
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