EL5153 INTERSIL [Intersil Corporation], EL5153 Datasheet - Page 13

• Manufacturer Part Number: EL5153
• Description: 270MHz Ultra-Accurate Amplifiers
• Manufacturer: INTERSIL [Intersil Corporation]

Strain Gauge
The strain gauge is an ideal application to take advantage of
the moderate bandwidth and high accuracy of the EL5152.
The operation of the circuit is very straight forward. As the
strain variable component resistor in the balanced bridge is
subjected to increasing strain its resistance changes
0V
V5
R15
VARIABLE SUBJECT TO STRAIN
1K
R14
1K
1K
13
R16
1K
22
22
EL5152, EL5153, EL5252, EL5455
4
4
R18
R17
1K
1K
1K
RF
3
2
resulting in an imbalance in the bridge. A voltage variation
from the referenced high accuracy source is generated and
translated to the difference amplifier through the buffer
stage. This voltage difference as a function of the strain is
converted into an output voltage.
U1A
V4
+
-
V2
11
V+
V-
4
L1
10µH
L4
10µH
C12
5V
C6
5V
1n
1n
R5
1K
R11
1K
1
C3
C11
1n
1n
RL
1K
V
OUT
(V1+V2+V3+V4)
October 3, 2005
FN7385.4