AD827JR datasheet(6/8 Pages) AD

Part #	AD827JR

Description	High Speed, Low Power Dual Op Amp

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Manufacturer	AD [Analog Devices]

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AD827

REV. B

–6–

Figure 19. Crosstalk vs. Frequency

Figure 20. Crosstalk Test Circuit

INPUT PROTECTION PRECAUTIONS

An input resistor (resistor RIN of Figure 21a) is recommended in

circuits where the input common-mode voltage to the AD827

may exceed (on a transient basis) the positive supply voltage.

This resistor provides protection for the input transistors by

limiting the maximum current that can be forced into their

bases.

For high performance circuits, it is recommended that a second

resistor (RB in Figures 21a and 22a) be used to reduce bias-

current errors by matching the impedance at each input. This

resistor reduces the error caused by offset voltages by more than

an order of magnitude.

Figure 21c. Follower Small

Signal Pulse Response

Figure 22c. Inverter Small

Signal Pulse Response

Figure 21b. Follower Large Signal

Pulse Response

Figure 22b. Inverter Large Signal

Pulse Response

Figure 21a. Follower Connection

Figure 22a. Inverter Connection

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