SMNH
Vishay Foil Resistors
Ultra High Precision Bulk Metal® Foil Technology
4 Resistor Surface Mount Hermetic Network with
0.5 ppm/°C TCR Tracking and 0.005 % Tolerance Match
FEATURES
• Temperature coefficient of resistance (TCR):
absolute: ± 2 ppm/°C typical
(- 55 °C to + 125 °C, + 25 °C ref.)
tracking: ± 0.5 ppm/°C typical
• Resistance range: 5 Ω to 33 kΩ
INTRODUCTION
Vishay model SMNH networks incorporate all the
performance features of Vishay Bulk Metal® Foil technology
in a product ready for surface mounting. The 8 pin gull wing
side brazed DIP is the smallest ceramic package. Ceramic
has the advantage of electrical isolation on the underside
and high heat dissipation capability.
Resistors in network form, around the operational amplifier
for example, are called upon to track at changing ambient
temperature, to hold ratio under power and to force the ratio
changes over a period of time to be very low.
The hermeticity, the location of the chips within the package
and the “heat-sink effect” of the ceramic package itself help
preserve uniform conditions inside it. The Bulk Metal Foil
Vishay technology advantage in such a construction assures
remarkable performance due to the following factors:
- fundamentally low TCR
- very small drift with load over time
- common behavior: all drifts move in the same direction
with temperature, load and time
- TCR and tolerance match
- excellent tracking
• Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
• Power rating: at 70 °C
Entire package: 0.4 W
Each resistor: 0.1 W
• Resistance tolerance match: ± 0.005 %
• Load life stability per resistor: 0.005 % (0.1 W at 70 °C,
1000 h)
• Load life stability ratio: 0.005 % (0.1 W at 70 °C)
• Shelf life stability per resistor: 0.0002 % (2 ppm)
• Shelf life stability ratio: 0.0001 % (1 ppm)
• Electrostatic discharge (ESD) up to 25 000 V
• Short time overload ≤ 0.002 % (20 ppm)
• Non-inductive, non-capacitive design
• Rise time: 1 ns effectively no ringing
• Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
• Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
• Voltage coefficient: < 0.1 ppm/V
The major highlights are emphasized by an excellent load life
and shelf life ratio stability.
• Non inductive: < 0.08 µH
Vishay hermetic resistor networks are based on fabrication
from a standing inventory of packages and resistor chips.
This permits quick delivery of prototypes since there are no
masks to design or trial processings to be made. Further, it
allows any combination of values, tolerances and circuits.
There are normally no engineering or setup charges, and no
minimum quantities are required. Delivery can be in two
weeks. (See network express prototype service.)
• Terminal finish: gold plated (lead (Pb)-free)
• Non hot spot design
• For better performances please contact us
• Available with Z-Foil technology for improved TCR to
0.2 ppm/°C
• Compliant to RoHS directive 2002/95/EC
The sequence of fabrication includes selection of chips, die
attachment, wirebonding, value trimming, and hermetic
sealing. The finished product provides the stability
associated with Foil resistors in a hermetically sealed
package.
Hermetic sealing of Vishay’s networks enhances their
already inherently stable environmental performance. The
result is improved load life stability and better performance
during high temperature and moisture exposure.
FIGURE 1 - SCHEMATICS
SMNH1
8
7
R2
R1
1
R2
2
SMNH2
6
5
R1
3
R1
4
7
8
R2
2
6
R2
5
R1
3
Note: R1 and R2 may be same value, if desired
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63092
Revision: 25-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
1
SMNH
Vishay Foil Resistors
TABLE 1 - MODEL SMNH SPECIFICATIONS
ABSOLUTE TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
MODEL
RESISTANCE VALUES
TYPICAL + MAX. SPREAD ABSOLUTE
500 Ω to 33 kΩ
± 2 ± 2.5 ppm/°C
100 Ω to 500Ω
SMNH
TOLERANCE
10 Ω to 100 Ω
± 2 ± 3.5 ppm/°C
5 Ω to 10 Ω
MATCH
SAME VALUES
DIFFERENT VALUES
± 0.005 %
0.005 %
0.5 ppm/°C
1 ppm/°C
± 0.01 %
0.005 %
2 ppm/°C
3 ppm/°C
± 0.02 %
0.01 %
± 0.05 %
0.02 %
4 ppm/°C
5 ppm/°C
Percent of Rated Power
FIGURE 2 - POWER DERATING CURVE (1)
125
- 55 °C
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
+ 70 °C
+ 150
Rated Power
100
+ 100
75
ΔR
R
(ppm)
50
25
+ 50
0
- 50
- 100
± 2 ppm/°C (+ 25 °C Reference)
- 150
0
- 75 - 50 - 25
0
25
50
75
100
125
150
- 200
- 55 - 50
Ambient Temperature (°C)
- 25
0
+ 25
+ 50
+ 75 + 100 + 125
Ambient Temperature (°C)
(For more details, see table 1)
Note
Each resistor element 0.1 W at + 70 °C (0.4 W per package)
FIGURE 5 - DIMENSIONS in inches (millimeters)
FIGURE 4 - FORMAT OF CHIP RESISTOR
USED IN HERMETIC NETWORKS
0.150 ± 0.005
(3.81 ± 0.127)
Trim Points
V15X5
0.019 + 0.001
- 0.004
0.050 ± 0.005
(1.27 ± 0.127)
(1)
TCR TRACKING (max.)
V15X5
(0.483 + 0.025 )
- 0.102
0.005 ± 0.004
(1.27 ± 0.102)
0.029 + 0.001
- 0.004
(0.737 +- 0.025
0.102 )
0.020 ± 0.005
(0.508 ± 0.127)
Gold Plated Pads
FIGURE 6 - DIMENSIONS AND IMPRINTING EXAMPLE in inches (millimeters)
0.520 ± 0.020
(13.21 ± 0.51)
0.295 ± 0.010
(7.49 ± 0.25)
Value R1
0.090 Max.
(2.29)
Value R2
SMNH1
10K5Q5K25
.V B0320
0.1
0.138
0.38
Pin 1 Identification Date Code
0.008 ± 0.016
(0.20 ± 0.41)
0.100 Max.
(2.54)
0.180 Max.
(4.57)
0.100 Typ.
(2.54)
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2
Proposed Land Pattern
0.470 Max.
(11.94)
Ratio Tolerance Code
0.024
0.015 to 0.022
(0.38 to 0.56)
For any questions, contact: foil@vishaypg.com
Document Number: 63092
Revision: 25-Mar-10
SMNH
Vishay Foil Resistors
FIGURE 7 - TRIMMING TO VALUES
(Conceptual Illustration)
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
TABLE 2 - MECHANICAL SPECIFICATIONS
Resistive Element
High precision Bulk Metal Foil chips
Body
Ceramic package:
94 % alumina (Al2O3)
Lid
Gold plated kovar
Current Path
After Trimming
Terminals
Alloy 42 (iron nickel) with 100 µ" gold
plating (MIL-STD-1276, type G-21-A)
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
Internal Connections
Gold wire bonding
Solderability
Per MIL-PRF-83401
Marking Resistance
to Solvents
Permanency testing per
MIL-PRF-83401
Current Path
Before Trimming
Note: Foil shown in black, etched spaces in white
TABLE 3 - PERFORMANCE SPECIFICATIONS (PER MIL-PRF 83401 TEST METHODS)
SPECIFICATIONS
TYPICAL LIMITS
MAXIMUM LIMITS
Thermal Shock 5 x (- 65 °C to + 125 °C) and
Power Conditioning 1.5 rated power at 25 °C, 100 h
ΔR = 0.003 % (30 ppm)
ΔRatio = 0.001 % (10 ppm)
0.015 % (150 ppm)
0.015 % (150 ppm)
Low Temperature Operation
ΔR = 0.005 % (50 ppm)
ΔRatio = 0.005 % (50 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Short Time Overload
6.25 rated power; 5 s
ΔR = 0.002 % (20 ppm)
ΔRatio = 0.002 % (20 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Terminal Strength
ΔR = 0.001 % (10 ppm)
ΔRatio = 0.001 % (10 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Resistance to Soldering Heat
260 °C, 10 s
ΔR = 0.002 % (20 ppm)
ΔRatio = 0.001 % (10 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Moisture Resistance
ΔR = 0.003 % (30 ppm)
ΔRatio = 0.003 % (30 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Shock
100 G, sawtooth
ΔR = 0.001 % (10 ppm)
ΔRatio = 0.001 % (10 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Vibration, High Frequency
ΔR = 0.001 % (10 ppm)
ΔRatio = 0.001 % (10 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Load Life
1000 h at + 70 °C; 0.1 W per resistor
ΔR = 0.005 % (50 ppm)
ΔRatio = 0.005 % (50 ppm)
0.025 % (250 ppm)
0.01 % (100 ppm)
Load Life
1000 h at + 25 °C; 0.1 W per resistor
ΔR = 0.002 % (20 ppm)
ΔRatio = 0.001 % (10 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
High Temperature Exposure
100 h at + 125 °C
ΔR = 0.005 % (50 ppm)
ΔRatio = 0.005 % (50 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Low Temperature Storage
24 h at - 65 °C
ΔR = 0.002 % (20 ppm)
ΔRatio = 0.002 % (20 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
Shelf Life Stability (6 years)
ΔR = 0.0002 % (2 ppm)
ΔRatio = 0.0001 % (1 ppm)
Insulation Resistance 100 V (DC)
> 104 MΩ
DWV Atm. Pressure
200 V
Weight
0.95 g
Notes
• ΔR’s are not cumulative. For purposes of determining reliability calculations, consider the characteristics shown as figures of merit and allow
no more than ± 0.05 ΔR lifetime. Allow proportionately less if the severity of anticipated environmental stresses are small compared to the
tests as defined in MIL-PRF-83401.
• Post manufacturing operation (PMO) has the effect of minimizing ΔR’s. Consult Vishay applications engineering for details.
• ΔRatio refers to the change in ratio between resistors within the network package from before, to after, the specified test.
Document Number: 63092
Revision: 25-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
3
SMNH
Vishay Foil Resistors
QUALITY INSPECTION AND TESTING
Network performance is established during the engineering design phase and is dependent on the materials of construction. Most
characteristics are inherent in the Bulk Metal Foil technology and provide the high order of performance displayed throughout this
catalog. Stability and drift levels can be improved beyond those shown in the catalog. Applications engineering is available to
recommend screen testing beyond the standard outgoing inspection when catalog limits are insufficient. The chart below shows
the standard outgoing testing and the additional user specified screen tests that may be appropriate for a particular application.
TESTING OF COMMERCIAL PRODUCT - VISHAY NETWORKS
Our standard outgoing testing consists of:
1. DC resistance test 100 %
1. 1 Conformity to value
1. 2 Conformity to tolerance
2. Visual and Mechanical 100 %
2. 1 Conformity to physical size
2. 2 Cleanliness of leads
2. 3 Conformity of printing
3. Ship check (sample plan)
3. 1 Conformity of packaging
3. 2 Conformity of count
ADDITIONAL TESTING TO MIL SPEC
Group A testing to MIL-PRF-83401 imposes the following:
1. Thermal shock 100 %
5X from - 65 °C to + 125 °C
2. Power conditioning 100 %
2. 1 100 h at 25 °C, 1.5 x rated power
2. 2 ΔR and ΔRatio calculation
3. Visual and mechanical after the above tests (sample plan)
3. 1 Conformity to physical size
3. 2 Workmanship
3. 3 Damage due to the above tests
4. 10 % PDA or one piece whichever is greater
5. Solderability (sample plan)
Group B sample testing to MIL-PRF-83401 imposes the following:
1. Temperature coefficient of resistance (sample plan)
2. Resistance to solvents (sample plan)
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For any questions, contact: foil@vishaypg.com
Document Number: 63092
Revision: 25-Mar-10
SMNH
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION (1)
NEW GLOBAL PART NUMBER: Y1521V0207TV0L (preferred part number format)
DENOTES PRECISION
VCODE
TOLERANCE MATCH
PACKAGING
Y
RESISTANCE
VALUE CODE
V = 0.005 %
T = 0.01 %
Q = 0.02 %
L = bulk pack
U = ESD tubes
Y
1
5
2
1
V
0
2
0
7
T
V
0
L
PRODUCT CODE
ABSOLUTE TOLERANCE
CHARACTERISTICS
SMNH1 = 1521
SMNH2 = 1522
V = ± 0.005 %
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
0 = gold plated termination
(lead (Pb)-free)
1 to 998 = custom
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1521 V0207 T V 0 L:
TYPE: SMNH1
VALUES: 10K/5K (see VCODE V0207 in table 5 below)
ABSOLUTE TOLERANCE: ± 0.01 %
TOLERANCE MATCH: 0.005 %
TERMINATION: gold plated (lead (Pb)-free)
PACKAGING: bulk pack
HISTORICAL PART NUMBER: SMNH1 10K/5K T V B (will continue to be used)
SMNH1
10K/5K
T
V
B
MODEL
RESISTANCE
VALUE
TOLERANCE
TOLERANCE
MATCH
PACKAGING
SMNH1
SMNH2
R1 = 10 kΩ
R2 = 5 kΩ
V = 0.005 %
T = 0.01 %
Q = 0.02 %
B = bulk pack
(ESD plastic box)
U = ESD tubes
V = ± 0.005 %
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
Note
(1) Application engineering release: for non-standard requests, please contact application engineering
TABLE 5 - RESISTANCE VALUE CODE LIST FOR POPULAR RATIOS
VCODES
V0201
V0202
V0197
V0203
V0198
V0204
V0193
V0205
V0194
V0187
V0200
V0195
V0188
V0184
V0196
V0181
R1/R2
RATIO
100
50
25
20
10
5
4
R1
R2
VCODES
10K
10K
5K
10K
5K
10K
2K
10K
2K
1K
5K
2K
1K
500R
2K
400R
100R
200R
100R
400R
200R
500R
100R
1K
200R
100R
1K
400R
200R
100R
500R
100R
V0189
V0185
V0207
V0175
V0190
V0182
V0179
V0186
R1/R2
RATIO
V0178
V0180
V0183
V0023
V0191
V0176
V0019
V0008
2.5
2
1.25
1
R1
R2
1K
500R
10K
2K
1K
400R
200R
500R
400R
200R
5K
1K
500R
200R
100R
400R
100R
200R
400R
500R
1K
2K
5K
10K
100R
200R
400R
500R
1K
2K
5K
10K
Note
• Other values available upon request
Document Number: 63092
Revision: 25-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
5
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Vishay Precision Group, Inc.
Disclaimer
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any other disclosure relating to any product.
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not limited to, the warranty expressed therein.
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Information provided in datasheets and/or specifications may vary from actual results in different applications and
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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