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AD587UQ Scheda tecnica(PDF) 9 Page - Analog Devices

Il numero della parte AD587UQ
Spiegazioni elettronici  High Precision 10 V Reference
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD587UQ Scheda tecnica(HTML) 9 Page - Analog Devices

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AD587
Rev. H | Page 9 of 12
Each AD587J and AD587K grade unit is tested at 0°C, 25°C,
and 70°C. Each AD587U grade unit is tested at −55°C, +25°C,
and +125°C. This approach ensures that the variations of the
output voltage that occur as the temperature changes within the
specified range are contained within a box whose diagonal has a
slope equal to the maximum specified drift. The position of the
box on the vertical scale changes from device to device as initial
error and the shape of the curve vary. The maximum height of
the box for the appropriate temperature range and device grade
is shown in Figure 16. Duplication of these results requires a
combination of high accuracy and stable temperature control in
a test system.
DEVICE
GRADE
AD587J
AD587K
AD587U
14.00
7.00
9.00
0 TO +70°C
–55°C TO +125°C
MAXIMUM OUTPUT CHANGE – mV
Figure 16. Maximum Output Change in Millivolts
NEGATIVE REFERENCE VOLTAGE FROM AN AD587
The AD587 can be used as shown in Figure 17 to provide a
precision −10.000 V output. The +VIN pin is tied to at least a
+3.5 V supply, the output pin is grounded, and the AD587
ground pin is connected through a resistor (RS) to a −15 V
supply. The −10 V output is taken from the ground pin (Pin 4)
instead of VOUT. It is essential to arrange the output load and the
supply resistor (RS) so that the net current through the AD587 is
between 2.5 mA and 10.0 mA (RS should be kept below 1 kΩ).
The temperature characteristics and long-term stability of the
device is essentially the same as that of a unit used in the
standard 10 V output configuration.
2
6
4
GND
AD587
3.5V→26V
1nF
RS
–15V
–10V
+VIN
VOUT
←IL
2.5mA <
5V
RS
– IL < 10mA
Figure 17. AD587 as a Negative 10 V Reference


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