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AD780 Fiches technique(PDF) 7 Page - Analog Devices

No de pièce AD780
Description  2.5 V/3.0 V High Precision Reference
Download  10 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD780 Fiches technique(HTML) 7 Page - Analog Devices

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AD780
REV. B
–7–
TURN-ON TIME
The time required for the output voltage to reach its final value
within a specified error band is defined as the turn-on settling
time. The two major factors that affect this are the active circuit
settling time and the time for the thermal gradients on the chip
to stabilize. Typical settling performance is shown in Figure 11
following. The AD780 settles to within 0.1% of its final value
within 10
µs.
2.499V
2.498V
2.500V
0V
5V
10 s/DIV
VIN
VOUT
Figure 11. Turn-On Settling Time Performance
DYNAMIC PERFORMANCE
The output stage of the AD780 has been designed to provide
superior static and dynamic load regulation.
Figure 12 shows the performance of the AD780 while driving a
0 mA to 10 mA load.
+VIN
VOUT
AD780
VL
0V
VOUT
249
1 F
Figure 12a. Transient Resistive Load Test Circuit
10mA
0mA
10 s/DIV
ILOAD
VOUT (CL = 0pF)
Figure 12b. Settling Under Transient Resistive Load
The dynamic load may be resistive and capacitive. For example
the load may be connected via a long capacitive cable. Figure 13
following shows the performance of the AD780 driving a
1000 pF, 0 mA to 10 mA load.
+VIN
VOUT
AD780
VL
0V
VOUT
249
1 F
CL
1000pF
Figure 13a. Capacitive Load Transient Response
Test Circuit
10 s/DIV
0mA
10mA
ILOAD
VOUT
(CL = 1000pF)
Figure 13b. Settling Under Dynamic Capacitive Load


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