Data Sheet

AD584

Rev. C | Page 7 of 12

PERFORMANCE OVER TEMPERATURE

Each AD584 is tested at three temperatures over the −55°C to

+125°C range to ensure that each device falls within the maximum

error band (see Figure 6) specified for a particular grade (that is, S

and T grades); three-point measurement guarantees performance

within the error band from 0°C to 70°C (that is, J and K grades).

The error band guaranteed for the AD584 is the maximum

deviation from the initial value at 25°C. Thus, given the grade

of the AD584, the maximum total error from the initial tolerance

plus the temperature variation can easily be determined. For

example, for the AD584T, the initial tolerance is ±10 mV, and

the error band is ±15 mV. Therefore, the unit is guaranteed to

be 10.000 V ± 25 mV from −55°C to +125°C.

Figure 6. Typical Temperature Characteristic

OUTPUT CURRENT CHARACTERISTICS

The AD584 has the capability to either source or sink current

and provide good load regulation in either direction; although,

it has better characteristics in the source mode (positive current

into the load). The circuit is protected for shorts to either positive

supply or ground. Figure 7 shows the output voltage vs. the

output current characteristics of the device. Source current is

displayed as negative current in the figure, and sink current is

displayed as positive current. The short-circuit current (that is,

0 V output) is about 28 mA; however, when shorted to 15 V, the

sink current goes to approximately 20 mA.

Figure 7. Output Voltage vs. Output Current (Sink and Source)

DYNAMIC PERFORMANCE

Many low power instrument manufacturers are becoming

increasingly concerned with the turn-on characteristics of the

components being used in their systems. Fast turn-on components

often enable the end user to keep power off when not needed

and yet respond quickly when the power is turned on. Figure 8

displays the turn-on characteristic of the AD584. Figure 8 is

generated from cold-start operation and represents the true

turn-on waveform after an extended period with the supplies off.

Figure 8 shows both the coarse and fine transient characteristics of

the device; the total settling time to within ±10 mV is about

180 µs, and there is no long thermal tail appearing after the point.

Figure 8. Output Settling Characteristic

10.005

10.000

9.995

–55

0

25

70

125

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

0

5

10

15

20

–5

–10

–15

SINK

SOURCE

–20

14

12

10

8

6

4

2

0

SETTLING TIME (µs)

100

150

200

250

50

0

10.03V

10.02V

12V

11V

10V

20V

10V

0V

10.01V

10.00V

OUTPUT

OUTPUT

POWER

SUPPLY

INPUT