AD680
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.
0.1
µF
Figure 7 displays the output amplifier characteristics driving a
1000 pF, 0 mA to 10 mA load.
+V
IN
V
OUT
+V
IN
AD680
C
L
1000pF
249Ω
V
OUT
0.1
µF
V
OUT
AD680
249Ω
V
OUT
V
L
V
OUT
0V
V
L
V
OUT
0V
Figure 7a. Capacitive Load Transient Response Test
Circuit
Figure 6a. Transient Load Test Circuit
Figure 7b. Output Response with Capacitive Load
LOAD REGULATION
Figure 6b. Large-Scale Transient Response
Figure 8 shows the load regulation characteristics of the AD680.
Figure 6c. Fine Scale Settling for Transient Load
Figure 8. Typical Load Regulation Characteristics
REV. C
–5–
AD [ ANALOG DEVICES ]
