AD1582/AD1583/AD1584/AD1585

Data Sheet

Rev. J | Page 12 of 16

OUTPUT VOLTAGE HYSTERESIS

High performance industrial equipment manufacturers can

require the AD1582/AD1583/AD1584/AD1585 to maintain a

consistent output voltage error at 25°C after the references are

operated over the full temperature range. All references exhibit

a characteristic known as output voltage hysteresis; however, the

AD1582/AD1583/AD1584/AD1585 are designed to minimize

this characteristic. This phenomenon can be quantified by mea-

suring the change in the +25°C output voltage after temperature

excursions from +125°C to +25°C and from −40°C to +25°C.

Figure 13 displays the distribution of the AD1582/AD1583/

AD1584/AD1585 output voltage hysteresis.

80

70

60

50

–700

–450

–200

50

300

550

40

30

20

10

0

ppm

Figure 13. Output Voltage Hysteresis Distribution

SUPPLY CURRENT VS. TEMPERATURE

The quiescent current for the AD1582/AD1583/AD1584/

AD1585 varies slightly over temperature and input supply range.

Figure 14 illustrates the typical performance for the

AD1582/AD1583/AD1584/AD1585 reference when varying

both temperature and supply voltage. As is evident from

Figure 14, the AD1582/AD1583/AD1584/AD1585 supply

current increases only 1.0 μA/V, making this device extremely

attractive for use in applications where there can be wide

variations in supply voltage and a need to minimize power

dissipation.

100

80

60

40

20

0

34

5

6

7

8

9

10

11

Figure 14. Typical Supply Current over Temperature

SUPPLY VOLTAGE

One of the ideal features of the AD1582/AD1583/AD1584/AD1585

is low supply voltage headroom. The parts can operate at supply

device can be damaged.

AC PERFORMANCE

To apply the AD1582/AD1583/AD1584/AD1585, it is important

to understand the effects of dynamic output impedance and

power supply rejection. In Figure 15, a voltage divider

is formed by the AD1582/AD1583/AD1584/ AD1585 output

impedance and by the external source impedance. Figure 16

shows the effect of varying the load capacitor on the reference

output. Power supply rejection ratio (PSRR) should be determined

when characterizing the ac performance of a series voltage

reference. Figure 17 shows a test circuit used to measure PSRR,

and Figure 18 demonstrates the ability of the AD1582/AD1583/

AD1584/AD1585 to attenuate line voltage ripple.

5V

5µF

1µF

10kΩ

10kΩ

2kΩ

10kΩ

±2V

±100µA

×1

DUT

Figure 15. Output Impedance Test Circuit

100

AD1585

AD1582

10

1

0.1

10

100

1k

10k

100k

1M

FREQUENCY (Hz)

1µF CAP

Figure 16. Output Impedance vs. Frequency

5V ± 100mV

0.22µF

0.22µF

10V

10kΩ

10kΩ

±200mV

×1

DUT

Figure 17. Ripple Rejection Test Circuit