Datasheet

TYPICAL APPLICATIONS
OPA454
0-2mA
+95V
45.3kW
-5V
V =0Vto+91V
OUT
0.1 Fm
0.1 Fm
ProtectsDAC
DuringSlewing
DAC8811
or
DAC7811
-IN
+IN
V-
V+
R
L
+50V
UpTo
195V
Piezo
(1)
Crystal
-50V
MASTER
R
9kW
2
R
1kW
1
V
±4V
IN
OPA454
+50V
-50V
SLAVE
R
10kW
4
R
10kW
3
OPA454
-IN
+IN
-IN
+IN
V
OUT
V
OUT
V+ V+
V- V-
A
1
A
2
OPA454
SBOS391A – DECEMBER 2007 – REVISED DECEMBER 2008 ....................................................................................................................................... www.ti.com
Figure 72 and Figure 73 illustrate the OPA454 in a programmable voltage source and a bridge circuit,
respectively.
Figure 72. Programmable Voltage Source
(1) For transducers with large capacitance, stabilization may become an issue. Be certain that the Master amplifier is stable before stabilizing
the Slave amplifier.
Figure 73. Bridge Circuit Doubles Voltage for Exciting Piezo Crystals
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Product Folder Link(s): OPA454