TLE2301

EXCALIBUR 3-STATE-OUTPUT WIDE-BANDWIDTH

POWER OPERATIONAL AMPLIFIER

SLOS131 – DECEMBER 1993

19

POST OFFICE BOX 655303

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.

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

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.

11

14

+

–

3

6

CF2

39 pF

CF1

15 pF

100 nF

220

µF

100 nF

220

µF

4

5

12

13

10

15

2

7

16

1

VCC –

VCC +

0 V

IC1

+

+

Figure 26. Amplifier Decoupling and Compensation