AD746

–6–

REV. B

POWER SUPPLY BYPASSING

The power supply connections to the AD746 must maintain a

low impedance to ground over a bandwidth of 13 MHz or more.

This is especially important when driving a significant resistive

or capacitive load, since all current delivered to the load comes

from the power supplies. Multiple high quality bypass capacitors

are recommended for each power supply line in any critical

application. A 0.1

µF ceramic and a 1 µF tantalum capacitor as

shown in Figure 20 placed as close as possible to the amplifier

(with short lead lengths to power supply common) will assure

adequate high frequency bypassing, in most applications. A

minimum bypass capacitance of 0.1

µF should be used for any

application.

If only one of the two amplifiers inside the AD746 is to be

utilized, the unused amplifier should be connected as shown in

Figure 21a. Note that the noninverting input should be

Figure 19. THD Test Circuit

Figure 22a. Unity Gain Inverter

Figure 21a. Gain of 2 Follower

Figure 21b. Gain of 2 Follower

Large Signal Pulse Response

Figure 21c. Gain of 2 Follower

Small Signal Pulse Response

Figure 22b. Unity Gain Inverter

Large Signal Pulse Response

Figure 22c. Unity Gain Inverter

Small Signal Pulse Response

Figure 20. Power Supply

Bypassing