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| OPA454 Datasheet, PDF (24/36 Pages) Texas Instruments – High-Voltage (100V), High-Current (50mA) OPERATIONAL AMPLIFIERS, G = 1 Stable | |||
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OPA454
SBOS391 â DECEMBER 2007
www.ti.com
TYPICAL APPLICATIONS
Figure 72 and Figure 73 illustrate the OPA454 in a programmable voltage source and a bridge circuit,
respectively.
+95V
0.1mF
45.3kW
DAC8811
or
DAC7811
0-2mA
Protects DAC
During Slewing
V+
-IN
OPA454
+IN
V- 0.1mF
VOUT = 0V to +91V
RL
-5V
Figure 72. Programmable Voltage Source
R1
R2
1kW
9kW
+50V
Up To
-IN
V+
195V
VOUT
MASTER
OPA454
VIN
+IN
A1
±4V
V-
Piezo(1)
Crystal
-50V
R3
10kW
R4
10kW
+50V
VOUT
A2
V+
-IN
OPA454
+IN
V-
SLAVE
-50V
(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
24
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Product Folder Link(s): OPA454
Copyright © 2007, Texas Instruments Incorporated
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