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Type 1787 Current Sense Resistor Networks
Page 1 of 2
Accurate Current Sensing in Multi-Range Instrumentation
Type 1787 Current Sense Resistor Networks utilize Caddock's Micronox® resistance films and advanced high thru-put laser manufacturing capabilities to achieve many vital advantages in precision current measurement circuits, including laboratory and bench-type digital instrumentation:
• The thin-profile single-package configuration replaces as many as four discrete current sense resistors.
• The monolithic construction and standardized lead spacing simplify installation.
• Caddock Micronox® resistance films provide exceptional stability for improved long-term measurement accuracy.
Twelve standard models in five network arrangements provide the specific accuracy and resistance values required for a wide range of current measuring instruments and circuits.
Prototype quantities of most models of the Type 1787 Current Sense Resistor Networks are available either from stock or within 6 weeks after receipt of order.
Model No.
Resistance Values
Power Rating Watts
Max. Power Rating Watts Total Pkg.
Fig.
Absolute Tolerance
%
©
Maximum Absolute TC
©
Absolute Stability Max. % Change in Resistance Value
Ra
Rb
Rc
Rd
Ra
Rb
Rc
Rd
Load Life
©
Shelf Life
©
1787-31
999.9 Q
99.9 Q
9.9 Q
0.9 Q
0.25
0.25
0.50
1.0
1.0
1
0.25
80
0.05
0.03
1787-312
999.9 Q
99.9 Q
9.9 Q
0.9 Q
0.25
0.25
0.50
1.0
1.0
1
0.10
80
0.03
0.02
1787-41
1,000 Q
100 Q
10 Q
1 Q
0.25
0.25
0.50
1.0
1.0
2
0.25
80
0.05
0.03
1787-412
1,000 Q
100 Q
10 Q
1 Q
0.25
0.25
0.50
1.0
1.0
2
0.10
80
0.03
0.02
1787-5
999 Q
99 Q
9 Q
N/A
0.25
0.25
0.75
N/A
0.75
3
0.25
50
0.04
0.02
1787-53
999 Q
99 Q
9 Q
N/A
0.25
0.25
0.75
N/A
0.75
3
0.10
50
0.02
0.01
1787-535
999 Q
99 Q
9 Q
N/A
0.25
0.25
0.75
N/A
0.75
3
0.05
50
0.02
0.01
1787-6
1,000 Q
100 Q
10 Q
N/A
0.25
0.25
0.75
N/A
0.75
4
0.25
50
0.04
0.02
1787-64
1,000 Q
100 Q
10 Q
N/A
0.25
0.25
0.75
N/A
0.75
4
0.10
50
0.02
0.01
1787-645
1,000 Q
100 Q
10 Q
N/A
0.25
0.25
0.75
N/A
0.75
4
0.05
50
0.02
0.01
1787-13
99.9 Q
9.9 Q
0.9 Q
N/A
0.25
0.50
1.0
N/A
1.0
5
0.25
100
0.05
0.03
1787-132
99.9 Q
9.9 Q
0.9 Q
N/A
0.25
0.50
1.0
N/A
1.0
5
0.10
100
0.03
0.02
© Absolute Tolerance:
Tolerance of Ra, Rb, Rc, or Rd when measured in accordance with proper Figure No.
© Absolute Temperature Coefficient:
Temperature coefficient of Ra, Rb, Rc, or Rd from 0°C to +70°C, referenced to +25°C.
© Load Life: Stability of Ra, Rb, Rc, or Rd with full power applied individually for 2,000 hours at +70°C.
© Shelf Life: Stability of Ra, Rb, Rc, or Rd for six months at shelf conditions.
Storage Temperature: -55°C to +85°C.
Applications Engineering Sales and Corporate Office
17271 North Umpqua Hwy. CjA^LJLJOJC#I\ 1717 Chicago Avenue
Roseburg, Oregon 97470-9422 ffww« Riverside, California 92507-2364
Phone: (541) 496-0700 e-mail: caddock@caddock.com • web: www.caddock.com Phone: (951) 788-1700
Fax: (541) 496-0408 For Caddock Distributors listed by country see caddock.com/contact/dist.html Fax: (951) 369-1151
© 2004 Caddock Electronics, Inc.
28_IL119.1004
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