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
•
Vishay 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 “ΔR 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
•
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
20K
10K
1/1
R
1
R
2
FIGURE 1 - SCHEMATIC
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63122
Revision: 08-Jan-09
For any questions, contact: foil@vishay.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
ΔR
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)
ΔRATIO
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
Ω
measurement error
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For any questions, contact: foil@vishay.com
Document Number: 63122
Revision: 08-Jan-09
VFB1012D (Z-Foil)
Vishay Foil Resistors
TABLE 4 - 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 kΩ
R
2
= 4 kΩ
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: foil@vishay.com
Document Number: 63122
Revision: 08-Jan-09
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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