Datasheet

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
V
OUT
(V)
TEMPERATURE (°C)
00527-007
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
0 5 10 15 20–5–10–15
SINKSOURCE
–20
14
12
10
8
6
4
2
0
+V
S
= 15V
T
A
= 25°C
00527-008
SETTLING TIME (µs)
100 150 200 250500
10.03V
10.02V
12V
11V
10V
20V
10V
0V
10.01V
10.00V
OUTPUT
OUTPUT
POWER
SUPPLY
INPUT
00527-009