Datasheet AD584 (Analog Devices) - 7

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Data Sheet AD584 PERFORMANCE OVER TEMPERATURE
supply or ground. Figure 7 shows the output voltage vs. the Each AD584 is tested at three temperatures over the −55°C to output current characteristics of the device. Source current is +125°C range to ensure that each device fal s within the maximum displayed as negative current in the figure, and sink current is error band (see Figure 6) specified for a particular grade (that is, S displayed as positive current. The short-circuit current (that is, and T grades); three-point measurement guarantees performance 0 V output) is about 28 mA; however, when shorted to 15 V, the within the error band from 0°C to 70°C (that is, J and K grades). sink current goes to approximately 20 mA. The error band guaranteed for the AD584 is the maximum
+VS = 15V
deviation from the initial value at 25°C. Thus, given the grade
TA = 25°C 14
of the AD584, the maximum total error from the initial tolerance plus the temperature variation can easily be determined. For
) 12 V (
example, for the AD584T, the initial tolerance is ±10 mV, and
GE 10
the error band is ±15 mV. Therefore, the unit is guaranteed to be 10.000 V ± 25 mV from −55°C to +125°C.
OLTA 8 T V U 10.005 6 TP OU 4 2 0 –20 –15 –10 –5 0 5 10 15 20 (V) SOURCE SINK
008
10.000 UT O OUTPUT CURRENT (mA)
00527-
V
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
9.995
007 components being used in their systems. Fast turn-on components
–55 0 25 70 125 TEMPERATURE (°C)
00527- often enable the end user to keep power off when not needed Figure 6. Typical Temperature Characteristic and yet respond quickly when the power is turned on. Figure 8 displays the turn-on characteristic of the AD584. Figure 8 is
OUTPUT CURRENT CHARACTERISTICS
generated from cold-start operation and represents the true The AD584 has the capability to either source or sink current turn-on waveform after an extended period with the supplies off. and provide good load regulation in either direction; although, Figure 8 shows both the coarse and fine transient characteristics of it has better characteristics in the source mode (positive current the device; the total settling time to within ±10 mV is about into the load). The circuit is protected for shorts to either positive 180 µs, and there is no long thermal tail appearing after the point.
12V 10.03V OUTPUT 11V 10.02V OUTPUT 10.01V 10V 10.00V 20V POWER 10V SUPPLY INPUT 0V 0 50 100 150 200 250
009
SETTLING TIME (µs)
00527- Figure 8. Output Settling Characteristic Rev. C | Page 7 of 12 Document Outline Features General Description Pin Configurations Product Highlights Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Theory of Operation Applying the AD584 Performance over Temperature Output Current Characteristics Dynamic Performance Noise Filtering Using the Strobe Terminal Percision High Current Supply The AD584 as a Current Limiter Negative Reference Voltages from an AD584 10 V Reference with Multiplying CMOS DACs or ADCs Precision DAC Reference Outline Dimensions Ordering Guide