SURFACE MOUNT
NETWORKS
PRA 100,135,182
Vishay Sfernice
High Precision Resistor Arrays
FEATURES
• Very short deliveries even on specials
• High stability passivated nichrome resistive layer
• Tight T.C.R. (10ppm/°C) and T.C.R. tracking (to 1ppm/°C)
• Very low noise and voltage coefficient
PRA arrays can be used in most applications requiring a
matched pair (or set) of resistor elements. The networks
provide 1ppm/°C T.C.R. tracking, a ratio tolerance as tight
as 0.01% and outstanding stability. They are available in 1
mm, 1.35mm and 1.82mm pitch.
• Ratio tolerance to 0.01% (R
≥
200R)
• Pre-tinned terminations over nickel barrier
• Lead (Pb)-free available
Pb-free
Available
DIMENSIONS
I : Independent resistors
E
Termination
Electrical Diagram
R1
R2
R7 R8
R
S
Land Pattern
A
R
P
F
F
G
Q
PRA 135
mm
1.85
+ 0.2
- 0.1
+ 0.2
0.4
- 0.2
1.05
+ 0.15
- 0.15
0.25
1.35
+ 0.2
0.38
- 0
B
C
D
Number of resistors: 2 to 8
R1 = R2 =.... R8
Dim.
A
PRA 100
mm
mil
63
16
25.5
10
40
+ 0.2
-0
PRA 182
mm
3
+ 0.2
- 0.1
+ 0.2
0.4
- 0.2
1.3
+ 0.35
- 0.15
0.25
1.82
0.38
+ 0.2
-0
1.52
0.3
1
1.8
mil
118
16
51
10
72
15
59.8
12
40
70.8
mil
72
16
41
10
53.1
15
41.3
12
40
31.5
C : One common point N resistors
E
B
C
R1 R2
R7 R8
1.6
+ 0.2
- 0.1
+ 0.2
0.4
- 0.2
+ 0.15
0.65
- 0.15
0.25
1
0.38
0.7
0.3
1
0.6
D
E*
F
E = (N x F) ± 0.2mm
15
27.5
12
40
23.5
E = (N x F) ± 8mil
A
G
P
B
C
D
F
G
1.05
0.3
1
0.8
Q
Number of resistors: 2 to 8
R1 = R2 =.... R8
R
S
*E depends on number of resistors
ORDERING INFORMATION
PRA 100
MODEL
PRA 100
PRA 135
PRA 182
resistors
I
SCHEMATIC
OF RESISTORS
I : Independent
resistors
C : Common point
2
NUMBER
2 to 8
10kΩ
OHMIC VALUE
TOLERANCE
For different ohmic
values on a given
network a specific
part number is issued
(e.g. CNWxxx)
± 0.5 %
ABSOLUTE
TOLERANCE
± 0.1%
± 0.5%
0.1%
RATIO
0.1%
0.05%
0.02%
0.01%
B
TERMINATION
B : SnPb over
nickel barrier
N : SnAg over
nickel barrier
Lead (Pb)-free
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36
For technical questions contact: sfer@vishay.com
Document Number: 53033
Revision 26-Jul-05
PRA 100,135,182
High Precision Resistor Arrays
% RATED POWER
SURFACE MOUNT
NETWORKS
Vishay Sfernice
ELECTRICAL SPECIFICATIONS
Resistance Range :
PRA 100......100Ω to 200KΩ
PRA 135......100Ω to 300KΩ
PRA 182......100Ω to 1MΩ
100
Tolerances :
Absolute...± 0.5% to ± 0.1%
Ratio...0.1% - 0.05% - 0.02% - 0.01%
(R
≥
200R)
Temperature Coefficient :
Absolute......± 10ppm/°C (- 40 °C +125°C)
Ratio......2ppm/°C (1ppm/°C on request)
Power Rating :
PRA 100......100mW/resistor at + 70°C
PRA 135......100mW/resistor at + 70°C
PRA 182......100mW/resistor at + 70°C
Operating Temperature Range :
- 55°C to + 155°C
For temperature up to 200°C, please consult factory
Noise :
≤
- 35 dB
Voltage Coefficient :
≤
0.01ppm/V
Limiting Voltage :
PRA 100.......35V
PRA 135.......75V
PRA 182......100V
0
0
70
155
AMBIENT TEMPERATURE IN DEGREES CELSIUS
POWER RATING
SPECIAL FEATURES
Resistance values can be different on a given network
(R max. /R min. as high as 300) with no tooling charge
and short delivery.
Please, consult VISHAY SFERNICE for ohmic values,
tolerances and also temperature coefficient (e.g. ± 1ppm/
°C) outside the standard range.
PACKAGING
Several types of packaging are available: waffle-pack and
tape and reel
MECHANICAL SPECIFICATIONS
Substrate :
Alumina
Technology :
Thin film
Film :
Nickel chromium with mineral passivation
Terminations :
B Type :
SnPb over nickel barrier
N Type :
SnAg over nickel barrier
MARKING
On the primary package, printed information includes
VISHAY S.A. trademark series and model, schematic
number of resistors, ohmic value, absolute tolerance, ratio
tolerance, type of termination: B tinned over nickel barrier.
PERFORMANCE
DRIFTS
TESTS
CONDITIONS
CECC REQUIREMENTS
Overload
Climatic Sequences
Thermal Shock
Load Life
Resistance to Solder Heat
Moisture Resistance
High Temperature Storage
Rn : nominal resistance
2.5Un/2s
- 55°C + 155°C/5 moisture cycles
- 55°C + 155°C/5 cycles 30’
1000h/Pn at + 70°C
260°C/10s
0.01Pn at + 40°C 93% RH
1000h/no load at + 155°C
ABSOLUTE PER
(Typical Values)
0.05% Rn + 0.05Ω
0.1% Rn + 0.05Ω
0.05% Rn + 0.05Ω
0.1% Rn + 0.05Ω
0.05% Rn + 0.05Ω
0.1% Rn + 0.05Ω
0.1% Rn + 0.05Ω
0.01% Rn
0.01% Rn
0.01% Rn
0.02% Rn
0.01% Rn
0.01% Rn
0.02% Rn
RATIO
Document Number: 53033
Revision 26-Jul-05
For technical questions contact: sfer@vishay.com
www.vishay.com
37
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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