LT1460-10 View Datasheet(PDF) - Linear Technology
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LT1460-10 Datasheet PDF : 12 Pages
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LT1460-10
APPLICATIONS INFORMATION
1mV and implies a 50ppm and 100ppm change respec-
tively. This corresponds to a 13- to 14-bit system and is
not a problem for most 10- to 12-bit systems unless the
system has a calibration. In this case, as with temperature
hysteresis, this low level can be important and even more
careful techniques are required.
The most effective technique to improve PC board stress
is to cut slots in the board around the reference to serve as
a strain relief. These slots can be cut on three sides of the
reference and the leads can exit on the fourth side. This
“tongue” of PC board material can be oriented in the long
direction of the board to further reduce stress transferred
to the reference.
The results of slotting the PC boards of Figures 7a and
7b are shown in Figures 8a and 8b. In this example the
slots can improve the output shift from about 100ppm to
nearly zero.
8
8
4
4
0
LONG DIMENSION
0
LONG DIMENSION
–4
0
10
20
30
FLEXURE NUMBER
40
1460-10 F07a
Figure 7a. Two Typical LT1460S8-10s, Vertical
Orientation Without Slots
–4
0
10
20
30
FLEXURE NUMBER
40
1460-10 F07b
Figure 7b. Two Typical LT1460S8-10s, Horizontal
Orientation Without Slots
8
8
4
4
0
SLOT
–4
0
10
20
30
FLEXURE NUMBER
40
1460-10 F08a
Figure 8a. Same Two LT1460S8-10s in Figure 7a,
but With Slots
0
SLOT
–4
0
10
20
30
FLEXURE NUMBER
40
1460-10 F08b
Figure 8b. Same Two LT1460S8-10s in Figure 7b,
but With Slots
8
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