Bulk Metal
®
Foil Ultra High Technology Precision Trimming Potentiometers,
1
1
/
4
" Rectilinear, RJ12 Style, Designed to Meet or Exceed The Requirements
of MIL-PRF-22097, Char. F with Smooth and Unidirectional Output
Accutrim™ 1202
Vishay Foil Resistors
Document Number: 63055 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 25-Mar-10 1
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.
FEATURES
• Temperature coefficient of resistance (TCR):
±
10 ppm/°C maximum
(3)
(- 55 °C to + 150 °C ref. at + 25 °C);
through the wiper
(4)
;
±
25 ppm/°C
• A smooth and unidirectional resistance with
leadscrew adjustment
• Load life stability: 0.1 % typical ΔR, 0.5 % maximum ΔR
under full rated power at + 85 °C for 2000 h
• Settability: 0.05 % typical; 0.1 % maximum
• Setting stability: 0.1 % typical; 0.5 % maximum, ΔSS
• Power rating: 0.5 W at + 85 °C
• Resistance range: 2 Ω to 20 kΩ
• “O“-ring prevents ingress of fluids during any board
cleaning operation
• Electrostatic discharge (ESD) up to 25 000 V
• Terminal finish: gold plated (tin/lead finish is available on
request)
Note
• See Figures 1 and 2
Note
• Refer to page 4 for footnotes
* Pb containing terminations are not RoHS compliant, exemptions may apply
CERMET
Wiper Travel
Resistance
Wiper Travel
Resistance
BULK METAL
FOIL
WIREWOUND
Wiper Travel
Resistance
TABLE 1 - MODEL SELECTION
MODEL
TERMINATION
STYLE
AVERAGE
WEIGHT
(g)
POWER
RATING
at + 85 °C
AMBIENT
NO. OF
TURNS
1202
P-In line PC pins 2.5
0.5 W 25 ± 2
Y-staggered PC pins
(1)
2.5
L-flexible wire leads 3.3
LB-flexible wire leads
with bushings
5.1
TABLE 2 - VALUES VS. TOLERANCES
STANDARD RESISTANCE
VALUES (in Ω)
STANDARD TOLERANCES
2, 5, 10 ± 10 %
(2)
, ± 20 %
20, 50, 100, 200, 250, 500,
1K, 2K, 5K, 10K, 20K
5 %, 10 %
TABLE 3 - 1202 (RJ12) SERIES ELECTRICAL SPECIFICATIONS
Temperature Coefficient of Resistance (TCR), 50 Ω and up
End-to-end
(3)
± 10 ppm/°C maximum (- 55 °C to + 25 °C)
± 10 ppm/°C maximum (+ 25 °C to + 150 °C)
2 Ω, 5 Ω, 10 Ω, 20 Ω
Through the wiper
(4)
± 20 ppm/°C (- 55 °C to + 150 °C, ref. + 25 °C)
± 25 ppm/°C (- 55 °C to + 150 °C, ref. + 25 °C)
Stability
Load life at 2000 h, under full rated power of 0.5 W at + 85 °C
Load life at 10 000 h, under full rated power of 0.5 W at + 85 °C
0.1 % typical ΔR; 0.5 % maximum ΔR
0.1 % typical ΔR; 1.0 % maximum ΔR
Power Rating
(5)
0.5 W at + 85 °C
Settability
0.05 % typical; 0.1 % maximum
Setting Stability 0.1 % typical; 0.5 % maximum
Contact Resistance variation - CRV (noise) 3 Ω
typical;
10 Ω
maximum
Hop-off
0.25 % typical; 1.0 % maximum
High-Frequency Operation
Rise time
Inductance
Capacitance
to 100 MHz
10 ns at 1 kΩ
0.08 µH typical
0.5 pF typical
Operating Temperature Range - 55 °C to + 150 °C
