AD1582B データシートの表示（PDF） - Analog Devices

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AD1582B

2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References

Analog Devices 

AD1582/AD1583/AD1584/AD1585

5V

100

90

20µs

10

0%

1V

20µs

Figure 22. Turn-On Characteristics

5V

100

90

20µs

10

0%

1mV

20µs

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.

5V

100

90

Data Sheet

50µs

10

0%

200mV

50µs

Figure 24. Line Transient Response

5V

100

90

20µs

10

0%

5mV

20µs

Figure 25. Load Transient Response (0 mA to 5 mA Load)

5V

100

90

20µs

10

0%

5mV

20µs

Figure 26. Load Transient Response (0 mA to −1 mA Load)

Rev. J | Page 14 of 16

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