Datasheet

AD1582/AD1583/AD1584/AD1585 Data Sheet
Rev. J | Page 14 of 16
1
0
0%
10
0
5V
1V
20µs
20
µs
90
00701-022
Figure 22. Turn-On Characteristics
10
0%
100
5V
1mV 20µs
20µ
s
90
00701-023
Figure 23. Turn-On Settling
DYNAMIC PERFORMANCE
Many ADCs and DACs present transient current loads to the
reference and poor reference response can degrade converter
performance. The AD1582/AD1583/AD1584/AD1585 provide
superior static and dynamic line and load regulation. Because
these series references are capable of both sourcing and sinking
large current loads, they exhibit excellent settling charac-
teristics.
Figure 24 displays the line transient response for the AD1582/
AD1583/AD1584/AD1585. The circuit used to perform such
a measurement is shown in Figure 21, where the input supply
voltage is toggled from 5 V to 10 V, and the input and output
capacitors are each 0.22 μF.
Figure 25 and Figure 26 show the load transient settling cha-
racteristics for the AD1582/AD1583/AD1584/AD1585 when
load current steps of 0 mA to +5 mA and 0 mA to −1 mA are
applied. The input supply voltage remains constant at 5 V; the
input decoupling and output load capacitors are 4.7 μF and 1 μF,
respectively; and the output current is toggled. For both positive
and negative current loads, the reference responses settle very
quickly and exhibit initial voltage spikes of less than 10 mV.
10
0%
10
0
90
5
V
200mV
50
µ
s
50
µ
s
00701-024
Figure 24. Line Transient Response
10
0%
100
5V
5mV
90
20µs
20µs
00701-025
Figure 25. Load Transient Response (0 mA to 5 mA Load)
0
%
10
0
9
0
5
V
20µ
s
20µ
s
5mV
10
00701-026
Figure 26. Load Transient Response (0 mA to −1 mA Load)