TLE2301 Datasheet, PDF (19/22 Pages) Texas Instruments – EXCALIBUR 3-STATE-OUTPUT WIDE-BANDWIDTH POWER OPERATIONAL AMPLIFIER

TLE2301
EXCALIBUR 3-STATE-OUTPUT WIDE-BANDWIDTH
POWER OPERATIONAL AMPLIFIER
SLOS131 – DECEMBER 1993
APPLICATION INFORMATION
series resistor (continued)
Again, the value of the series resistor is sufficient to limit the peak-signal current below the device’s maximum
rating. This calculation does not take into account other resistive impedances in the signal path, which would
further reduce the peak signal current from the amplifier.
decoupling
Power-supply decoupling for the amplifier is provided by a 220-µF electrolytic capacitor and a 100-nF ceramic
capacitor per supply rail located close to the supply terminals of the TLE2301 device.
The decoupling capacitors for the negative supply should be connected to a pair of V_{CC –} terminals (4 and 5 or
12 and 13), whichever pair is most convenient from a printed-circuit-board (PCB) layout point of view. In order
to minimize parasitic lead inductances, these capacitors should be located as close as possible to the device
terminals to which they are connected. As the V_CC+ terminals are not adjacent on the package, the decoupling
capacitors should be connected to one terminal with a thick PCB track going to the other terminal.
The 220-µF electrolytic capacitor is chosen to provide good decoupling performance (less than 25-mV ripple
under the worst-case loading for the utility circuit). This value could be reduced to 100 µF for higher-frequency
consumer bands. The level of ripple depends on the source impedance of the power supply and the equivalent
series resistance of the chosen decoupling capacitors. The 100-nF ceramic capacitor provides high-frequency
decoupling for the amplifier.
CF1
15 pF
CF2
39 pF
16
11
–
1
14
+
IC1
7
2
15
10
13
12
5
4
+
220 µF
3
6
100 nF
VCC ₊
VCC _–
220 µF
+
100 nF
0V
Figure 26. Amplifier Decoupling and Compensation
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