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
The major highlights are emphasized by an excellent load life
and shelf life ratio stability.
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.)
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.
•
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 µV
RMS
/V of applied voltage (< - 40 dB)
•
Voltage coefficient: < 0.1 ppm/V
•
Non inductive: < 0.08 µH
•
Non hot spot design
•
Terminal finish: gold plated (lead (Pb)-free)
•
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
FIGURE 1 - SCHEMATICS
SMNH1
8
7
6
5
8
SMNH2
7
6
5
R
1
R
2
R
2
R
1
R
1
R
2
R
2
R
1
1
2
3
4
2
3
Note:
R
1
and R
2
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
MODEL
ABSOLUTE TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
RESISTANCE VALUES
500
Ω
to 33 kΩ
SMNH
100
Ω
to 500Ω
10
Ω
to 100
Ω
5
Ω
to 10
Ω
TOLERANCE
MATCH
0.005 %
0.005 %
0.01 %
0.02 %
TCR TRACKING (max.)
SAME VALUES
0.5 ppm/°C
2 ppm/°C
4 ppm/°C
DIFFERENT VALUES
1 ppm/°C
3 ppm/°C
5 ppm/°C
TYPICAL + MAX. SPREAD ABSOLUTE
± 2 ± 2.5 ppm/°C
± 0.005 %
± 0.01 %
± 0.02 %
± 0.05 %
± 2 ± 3.5 ppm/°C
FIGURE 2 - POWER DERATING CURVE
(1)
Percent of Rated Power
125
100
75
50
25
0
- 75 - 50 - 25
- 55 °C
+ 70 °C
Rated Power
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
+ 150
+ 100
Δ
R
R
(ppm)
+ 50
0
- 50
- 100
- 150
± 2 ppm/°C (+ 25 °C Reference)
- 25
0
+ 25
+ 50
+ 75 + 100 + 125
0
25
50
75
100
125
150
Ambient Temperature (°C)
Note
(1)
- 200
- 55 - 50
Ambient Temperature (°C)
(For more details, see table 1)
Each resistor element 0.1 W at + 70 °C (0.4 W per package)
FIGURE 4 - FORMAT OF CHIP RESISTOR
USED IN HERMETIC NETWORKS
V15X5
Trim Points
FIGURE 5 - DIMENSIONS
in inches (millimeters)
0.150 ± 0.005
(3.81 ± 0.127)
0.050 ± 0.005
(1.27 ± 0.127)
0.020 ± 0.005
(0.508 ± 0.127)
0.019 + 0.001
- 0.004
(0.483 + 0.025 )
- 0.102
0.005 ± 0.004
(1.27 ± 0.102)
V15X5
0.029 + 0.001
- 0.004
(0.737 + 0.025 )
- 0.102
Gold Plated Pads
FIGURE 6 - DIMENSIONS AND IMPRINTING EXAMPLE
in inches (millimeters)
Ratio Tolerance Code
Value R
1
0.295 ± 0.010
(7.49 ± 0.25)
SMNH1
10K5Q5K25
.V B0320
0.520 ± 0.020
(13.21 ± 0.51)
Value R
2
0.090 Max.
(2.29)
0.470 Max.
(11.94)
Proposed Land Pattern
0.1
0.138
0.38
Pin 1 Identification Date Code
0.008 ± 0.016
(0.20 ± 0.41)
0.100 Max.
(2.54)
0.015 to 0.022
(0.38 to 0.56)
0.024
0.180 Max.
(4.57)
0.100 Typ.
(2.54)
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2
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)
TABLE 2 - MECHANICAL SPECIFICATIONS
Resistive Element
Body
High precision Bulk Metal Foil chips
Ceramic package:
94 % alumina (Al
2
O
3
)
Gold plated kovar
Alloy 42 (iron nickel) with 100 µ" gold
plating (MIL-STD-1276, type G-21-A)
Gold wire bonding
Per MIL-PRF-83401
Permanency testing per
MIL-PRF-83401
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
Lid
Terminals
Internal Connections
Solderability
Marking Resistance
to Solvents
Note:
Foil shown in
black,
etched spaces in
white
TABLE 3 - PERFORMANCE SPECIFICATIONS (PER MIL-PRF 83401 TEST METHODS)
SPECIFICATIONS
Thermal Shock
5 x (- 65 °C to + 125 °C) and
Power Conditioning
1.5 rated power at 25 °C, 100 h
Low Temperature Operation
Short Time Overload
6.25 rated power; 5 s
Terminal Strength
Resistance to Soldering Heat
260 °C, 10 s
Moisture Resistance
Shock
100 G, sawtooth
Vibration, High Frequency
Load Life
1000 h at + 70 °C; 0.1 W per resistor
Load Life
1000 h at + 25 °C; 0.1 W per resistor
High Temperature Exposure
100 h at + 125 °C
Low Temperature Storage
24 h at - 65 °C
Shelf Life Stability
(6 years)
Insulation Resistance
100 V (DC)
DWV Atm. Pressure
Weight
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
TYPICAL LIMITS
ΔR
= 0.003 % (30 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.002 % (20 ppm)
ΔRatio
= 0.002 % (20 ppm)
ΔR
= 0.001 % (10 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.002 % (20 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.003 % (30 ppm)
ΔRatio
= 0.003 % (30 ppm)
ΔR
= 0.001 % (10 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.001 % (10 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.002 % (20 ppm)
ΔRatio
= 0.001 % (10 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.002 % (20 ppm)
ΔRatio
= 0.002 % (20 ppm)
ΔR
= 0.0002 % (2 ppm)
ΔRatio
= 0.0001 % (1 ppm)
> 10
4
MΩ
200 V
0.95 g
MAXIMUM LIMITS
0.015 % (150 ppm)
0.015 % (150 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.025 % (250 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
0.01 % (100 ppm)
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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4
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
Y
VCODE
RESISTANCE
VALUE CODE
TOLERANCE MATCH
V
= 0.005 %
T
= 0.01 %
Q
= 0.02 %
PACKAGING
L
= bulk pack
U
= ESD tubes
Y
1
5
2
1
V
0
2
0
7
T
V
0
L
PRODUCT CODE
SMNH1
= 1521
SMNH2
= 1522
ABSOLUTE TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
CHARACTERISTICS
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
MODEL
SMNH1
SMNH2
10K/5K
RESISTANCE
VALUE
R
1
= 10 kΩ
R
2
= 5 kΩ
T
TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
V
TOLERANCE
MATCH
V
= 0.005 %
T
= 0.01 %
Q
= 0.02 %
B
PACKAGING
B
= bulk pack
(ESD plastic box)
U
= ESD tubes
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
R
1
/R
2
RATIO
100
50
25
20
R
1
10K
10K
5K
10K
5K
10K
2K
10K
2K
1K
5K
2K
1K
500R
2K
400R
R
2
100R
200R
100R
400R
200R
500R
100R
1K
200R
100R
1K
400R
200R
100R
500R
100R
VCODES
V0189
V0185
V0207
V0175
V0190
V0182
V0179
V0186
V0178
V0180
V0183
V0023
V0191
V0176
V0019
V0008
R
1
/R
2
RATIO
2.5
R
1
1K
500R
10K
2K
1K
400R
200R
500R
100R
200R
400R
500R
1K
2K
5K
10K
R
2
400R
200R
5K
1K
500R
200R
100R
400R
100R
200R
400R
500R
1K
2K
5K
10K
2
1.25
10
5
1
4
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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