SMNZ (Z-Foil)
Ultra High Precision Z-Foil Surface Mount 4 Resistor Network
Dual-In-Line Package with TCR Tracking of 0.1 ppm/°C, PCR Tracking of
5 ppm at Rated Power, and Tolerance Match of 0.01 %
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.) (see table 1)
Tracking: 0.1 ppm/°C typical (see table 1)
Tolerance match: 0.01 %
Power coefficient tracking - “R2 -R1 due to self heating”:
5 ppm at rated power
Power rating: at 70 °C
Entire package: 0.4 W
Each resistor: 0.1 W
Ratio stability: 0.005 % (0.1 W at 70 °C, 2000 h)
Large variety of resistance ratios
Electrostatic discharge (ESD) above 25 000 V
Short time overload
0.0025 %
Non-inductive, non-capacitive design
Rise time: 1 ns without ringing
Current noise: <- 40 dB
Voltage coefficient < 0.1 ppm/V
Non-inductive: < 0.08 µH
Non hot spot design
Terminal Finishes available: lead (Pb)-free
tin/lead alloy
For better performances please contact us
Any value available within resistance range (e.g. 1K2345)
Prototype samples available from 48 h. For more
information, please contact
foil@vpgsensors.com
Any value and any ratio available within resistance range
INTRODUCTION
The Z-Foil technology provides a significant reduction of the
resistive components’ sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
0.05 ppm/°C Absolute TCR removes errors due to
temperature gradients.
Model SMNZ offers extremely low TCR (absolute and
tracking), excellent load life stability, tight tolerance (absolute
and matching), excellent ratio stability, low current noise, low
voltage coefficient and non sensitivity to ESD -
all in the
same resistor.
The SMNZ surface mount network is made up of 4
independent Bulk Metal
®
Z-Foil resistors in a small standard
molded epoxy package with 50 MIL lead pitch (JEDEC
MS-012 package).
The electrical specification of this integrated construction
offers improved performance and better real estate utilization
over discrete resistors and matched sets. The resistor may
be used independently or as divider pairs.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
FIGURE 1 - SCHEMATICS
R1
R1
R1
R1
OPTION 1
FOUR RESISTORS, SAME OHMIC VALUE
SAME ABSOLUTE TOLERANCE
APPLICATIONS
Instrumentation amplifiers
Bridge networks
Differential amplifiers
Ratio arms in bridge circuits
Medical and test equipment
Military
Airborne etc
R
2
R
1
V
1
V
2
-
R
1
R
2
+
V
out
SMNZ
R1
R2
R2
R1
Note
1. Different schematics are available (R1, R2, R3, R4)
OPTION 2
TWO RESISTOR PAIRS
R1/R2; R2/R1
TABLE 1 - MODEL SMNZ SPECIFICATIONS
MODEL
SMNZ
ABSOLUTE TCR
RESISTANCE
(- 55 °C TO + 125 °C, + 25 °C REF.)
1)
VALUES
(TYPICAL + MAX. SPREAD)
100
to1 k
1 k to 10 k
± 0.2 ± 2.8
± 0.2 ± 1.8
RESISTANCE
RATIO
R1/R2 = 1
1 < R1/R2
10
10 < R1/R2
100
TCR TRACKING
MAX.
0.5 ppm/°C
1.0 ppm/°C
2.0 ppm/°C
TOLERANCE
ABSOLUTE
± 0.02 %
± 0.05 %
± 0.1 %
MATCH
0.01 %
0.02 %
0.05 %
Note
1. SMN (Classic Foil) available with values up to 20 k
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63117
Revision: 4-Mar-15
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
1
SMNZ (Z-Foil)
FIGURE 2 - POWER DERATING CURVE
110
FIGURE 4 - TYPICAL TCR CURVE Z-FOIL
+ 500
+ 400
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 0.16 ppm/°C
- 55
- 25
0
+ 25
- 500
+ 60 + 75
+ 100 + 125
Percent of Rated Wattage
100
90
80
70
60
50
40
30
20
10
0
- 60 - 40 - 20
- 55
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
0
20
40
60
70
80
100 120 140 160
125
Ambient Temperature (°C)
Ambient Temperature (°C)
FIGURE 3 - DIMENSIONS AND IMPRINTING
EXAMPLE
in inches (millimeters)
0.008 ± 0.001
(0.20 ± 0.025)
TOLERANCE MATCH
VALUE R1
VALUE R2
0.028 ± 0.001
(0.71 ± 0.025)
(1)
FIGURE 5 - TRIMMING TO VALUES
(conceptual illustration)
0.050
(1.27)
0.0165 ± 0.0025
(0.42 ± 0.064)
SMNZ
0.157
(3.99)
0.239 ± 0.005
(6.07 ± 0.13)
10K Q 5K0
B0219
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
DATE
CODE
0.197 ± 0.005
(5.00 ± 0.13)
2° - 6°
Mutual Inductance
Reduction due
to Change in
Current Direction
0.0075
±
0.0025
(0.191
±
0.064)
0.068 ± 0.005
(1.73 ± 0.13)
Seating
Plane
Note:
Foil shown in black, etched spaces in white
Note
(1)
If the resistance value of R1 and R2 contains more than 6 characters together,
the VCODE will be printed instead (see Resistance Value Code List for Popular Ratios Table)
followed by the ratio tolerance code.
FIGURE 6 - LAND PATTERN
in inches (millimeters)
D
Z
G
X
Y
C
D
E
C
G Z
Y
MINIMUM
0.283
(7.19)
0.291
(7.39)
0.102
(2.59)
0.110
(2.79)
0.024
(0.61)
0.032
(0.81)
0.095
(2.41)
0.197
(5.00)
0.150
(3.81)
0.050
(1.27)
MAXIMUM
E
X
REFERENCE
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Document Number: 63117
Revision: 4-Mar-15
SMNZ (Z-Foil)
TABLE 2 - PERFORMANCE SPECIFICATIONS
(per MIL-PRF 914 test methods)
SPECIFICATIONS
Power Rating
at + 70 °C
TYPICAL LIMITS
Each resistor: 0.1 W
Entire package: 0.4 W
Maximum Working Voltage
(each resistor)
Thermal Shock
25 x (- 65 °C to + 125 °C)
Thermal Shock
5 x (- 65 °C to + 125 °C) and
Power Conditioning
1.5 rated power at 25 °C, 100 h
DWV Atm. Pressure
200 V (A.C), 1 min
Insulation Resistance
100 V (D.C), 1 min
Resistance to Soldering Heat
(P x R)
½
R
= 0.01 % (100 ppm)
Ratio
= 0.01 % (100 ppm)
R
= 0.02 % (200 ppm)
Ratio
= 0.015 % (150 ppm)
Successfully passed
> 10
4
M
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
Moisture Resistance
+ 65 °C to - 10 °C; 90 % to 98 % RH; 0.1 x rated power; 240 h
Shock (Specified Pulse)
100G
Vibration, High Frequency
(10 Hzto 2000 Hz), 20G
High Temperature Exposure
100 h at 125 °C
Low Temperature Storage
24 h at - 65 °C
Load Life Stability
at 70 °C; 0.1 W per resistor, 2000 h
Short Time Overload
6.25 x rated power; 5 s
Weight
R
= 0.02 % (200 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.01 % (100 ppm)
Ratio
= 0.01 % (100 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.0025 % (25 ppm)
0.08 g
Document Number: 63117
Revision: 4-Mar-15
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
3
SMNZ (Z-Foil)
TABLE 3 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y1747V0204BA9W (preferred part number format)
DENOTES PRECISION
Y
VCODE
RESISTANCE
VALUE CODE
TOLERANCE MATCH
T
= 0.01 %
Q
= 0.02 %
A
= 0.05 %
PACKAGING
R
= tape and reel
W
= waffle pack
U
= ESD tubes
Y
1
7
4
7
V
0
2
0
4
B
A
9
AER*
W
PRODUCT CODE
SMNZ
= 1747
ABSOLUTE TOLERANCE
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1747 V0204 B A 9 W:
TYPE: SMNZ
VALUES: 10K/500R
ABSOLUTE TOLERANCE: ± 0.1 %
TOLERANCE MATCH: 0.05 %
TERMINATION: Lead (Pb)-free
PACKAGING: Waffle Pack
HISTORICAL PART NUMBER: SMNZ 10K/500R TCR0.2 B A S W (will continue to be used)
SMNZ
MODEL
SMNZ
10K/500R
RESISTANCE
VALUE
R
1
= 10 k
R
2
= 500
TCR0.2
ABSOLUTE TCR
TCR0.2
B
ABSOLUTE
TOLERANCE
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
A
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
U
= ESD tubes
Note
* For non-standard requests, please contact Application Engineering.
TABLE 4 - RESISTANCE VALUE CODE LIST FOR POPULAR RATIOS
(other values available upon request)
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
R1
10K
10K
5K
10K
5K
10K
2K
10K
2K
1K
5K
2K
1K
500R
2K
400R
R2
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
R1/R2
RATIO
2.5
R1
1K
500R
10K
2K
1K
400R
200R
500R
100R
200R
400R
500R
1K
2K
5K
10K
R2
400R
200R
5K
1K
500R
200R
100R
400R
100R
200R
400R
500R
1K
2K
5K
10K
2
1.25
5
1
4
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Document Number: 63117
Revision: 4-Mar-15
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Vishay Precision Group, Inc.
Disclaimer
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Revision: 15-Jul-2014
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