Datasheet

Document Number: 51031 For technical questions, contact: [e-mail]
See also: Application notes
www.vishay.com
Revision: 23-Aug-07 97
P11, PA11
Modular Potentiometers with Cermet (P11) or
Conductive Plastic Elements (PA11)
Vishay Sfernice
POWER RATING CHART MULTIPLE ASSEMBLIES
Standard assemblies can comprise up to 7 modules in
addition to the shaft and bushing module.
Detents module (CV)
Switch modules (RS or RSI)
Potentiometer modules
Spacer module (EV) to increase the distance between rows
of pins from 5.06 mm (0.200) to 10.16 mm (0.400).
Screening module, with ground terminal.
LINEARITY - CONFORMITY
The independent linearity (conformity for the non linear laws)
is the maximum gap ΔV between the actual variation curve
and the theorical variation curve the nearest to it. The
linearity and the conformity are expressed in percentage of
the total applied voltage E
They are measured over 90 % of actual electrical travel
(centered).
On request linearity can be guaranteed in linear law.
For example: linearity ± 2 % + J 145 option (see ordering
procedure).
INTERLINEARITY - INTERCONFORMITY
It is the maximum deviation between the actual voltage
outputs of 2 or more pot modules in the same assembly. It is
expressed as a percentage of the total applied voltage, or in
dB attenuation.
Interlinearity is measured between 2 pot modules, over 10 to
90 % of the attenuation.
The interlinearity or interconformity is expressed as a
percentage of the total applied voltage :
Or in decibels by comparison between outputs V1 and V2
0
40
140
125
0.5
0
AMBIENT TEMPERA TURE IN °C
POWER IN W
70
60 20
100
80
P1 1 LIN. LA W “A ”
P1 1 LOG. LA WS
1
PA 11
V
E
V
Limits of
linearity test
Effective electrical travel
linearity conformity =
± ΔV max
E
V
E
C
V1
V2
Limits of test
Effective electrical travel
V1 V2
I % =
ICI
E
I dB = 20 log
V
1
V
2
The position of each module is free except the push/push,
momentary push which has to be the last module.