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1280G_10

Description
Bulk Metal® Foil Technology Ultra High Precision Trimming Potentiometers
File Size306KB,4 Pages
ManufacturerVishay
Websitehttp://www.vishay.com
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1280G_10 Overview

Bulk Metal® Foil Technology Ultra High Precision Trimming Potentiometers

Accutrim™ 1280G, 1285G
Vishay Foil Resistors
Bulk Metal
®
Foil Technology Ultra High Precision
Trimming Potentiometers
3
/
4
" Rectilinear, ± 5 ppm/°C and
± 15 ppm/°C TCR with a Smooth and Unidirectional Output
FEATURES
Temperature coefficient of resistance (TCR):
(- 55 °C to + 125 °C ref. at + 25 °C)
- ± 15 ppm/°C (model 1280G);
- ± 5 ppm/°C (model 1285G)
3)
;
- through the wiper ± 50 ppm/°C
INTRODUCTION
Vishay Foil precision trimmers have the Bulk Metal
®
Foil
resistive element which possesses a unique inherent
temperature and load life stability. Plus, their advanced
virtually back lash-free adjustment mechanism makes them
easy to set quickly and accurately and keeps the setting
exactly on target.
Resistance
A smooth and unidirectional resistance with leadscrew
adjustment
Load life stability: 0.5 % maximum
ΔR
under full rated
power at + 25 °C for 2000 h
Electrostatic discharge (ESD) up to 25 000 V
Settability: 0.05 % typical; 0.1 % maximum
Setting stability: 0.1 % typical; 0.5 % maximum,
ΔSS
Power rating: 0.75 W at + 25 °C
Resistance range: 10
Ω
to 20 kΩ
Resistance
BULK METAL
FOIL
WIREWOUND
Resistance tolerance: ± 10 %, ± 5 %
Backlash: < 0.05 %
Tap test: 0.05 % typical; 0.1 % maximum
“O”-ring prevents ingress of fluids during any board
cleaning operation
Wiper Travel
Wiper Travel
Resistance
Terminal finish: gold plated (tin/lead finish available on
request)
CERMET
Wiper Travel
TABLE 1 - 1280G AND 1285G SERIES ELECTRICAL SPECIFICATIONS
Resistance Tolerance
Resistance Range
TCR Model 1280G
TCR Model
Power
Settability
Setting Stability
Roll-on, Roll-off
Load Life Stability
End Resistance
C.R.V. (noise)
(2)
Frequency Characteristics
Notes
(1)
5 % available on special order
(2)
The 1280G can be screened for low noise, if required
(3)
For model 1285G 10
Ω
and 20
Ω
TCR is ± 10 ppm/°C
(4)
Panel mount available on special order
1285G
(3)
Model 1280G 10 %
(1)
, Model 1285G 5 %
10
Ω
to 20 kΩ
± 15 ppm/°C (- 55 °C to + 125 °C, ref. + 25 °C)
± 5 ppm/°C (- 55 °C to + 125 °C, ref. + 25 °C)
0.75 W at + 25 °C derated linearly to 0 W at + 125 °C (see Fig. 2)
0.05 % typical; 0.1 % maximum
0.1 % typical; 0.5 % maximum
0.25 % typical; 1.0 % maximum
0.5 %
ΔR
after 2000 h under full rated power at + 25 °C
2
Ω
maximum
3
Ω
typical; 10
Ω
maximum
10 ns rise time at 1 kΩ to 100 MHz
TABLE 2 - STANDARD VALUE
10
Ω,
20
Ω,
50
Ω,
100
Ω,
200
Ω,
500
Ω,
1 kΩ, 2 kΩ, 5 kΩ, 10 kΩ, 20 kΩ
Document Number: 63056
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1

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