AD680

REV. C

–5–

Figure 6 displays the characteristics of the AD680 output ampli-

fier driving a 0 mA to 10 mA load. Longer settling times will re-

sult if the reference is forced to sink any transient current.

In some applications, a varying load may be both resistive and

capacitive in nature, or the load may be connected to the

AD680 by a long capacitive cable.

AD680

+V

IN

V

OUT

249

Ω

V

L

0V

V

OUT

0.1

µF

V

OUT

Figure 6a. Transient Load Test Circuit

Figure 6b. Large-Scale Transient Response

Figure 6c. Fine Scale Settling for Transient Load

Figure 7 displays the output amplifier characteristics driving a

1000 pF, 0 mA to 10 mA load.

C

1000pF

L

249

Ω

V

L

0V

V

OUT

V

OUT

AD680

+V

IN

V

OUT

0.1

µF

Figure 7a. Capacitive Load Transient Response Test

Circuit

Figure 7b. Output Response with Capacitive Load

LOAD REGULATION

Figure 8 shows the load regulation characteristics of the AD680.

Figure 8. Typical Load Regulation Characteristics