www.vtiinstruments.com
EX1629 Basic Operation
45
The half-bridge strain conversion is calculated according to:
sense
-
backhalf
diff
V
V
V
excitation
unstrained
diff
V
V
V
V
r
GF
V
r
2
Setting this conversion automatically configures the input path for half-bridge mode, in which the
completion resistor is shorted and the back-half resistors are connected. This configuration is
illustrated in Figure 2-4.
Half-Bridge Poisson
This conversion applies to the following bridge configuration:
R (+ )
g
R (-
)
g
V
OUT
V
EXC
R
R
+
–
+
–
F
IGURE
3-4:
H
ALF
-B
RIDGE
P
OISSON
C
ONFIGURATION
The half-bridge strain conversion is calculated according to:
sense
-
backhalf
diff
V
V
V
excitation
unstrained
diff
V
V
V
V
r
1
2
1
4
r
r
V
GF
V
Setting this conversion automatically configures the input path for half-bridge mode, in which the
completion resistor is shorted and the back-half resistors are connected. This configuration is
illustrated in Figure 2-4.
Full-Bridge Bending
This conversion applies to the following bridge configuration:
V
EXC
+
+
–
+
–
+
–
–
V
OUT
F
IGURE
3-5:
F
ULL
-B
RIDGE
B
ENDING
C
ONFIGURATION
