AD587KQ Analog Devices Inc, AD587KQ Datasheet - Page 8

• Manufacturer Part Number: AD587KQ
• Manufacturer: Analog Devices Inc

Specifications of AD587KQ

• Fixed / Adjust / Prog: Precision
• Output Voltage (max): 10V
• Temperature Coefficient: 10ppm/°C
• Reference Voltage Accuracy (max): 5
• Line Regulation: 100uV/V
• Load Regulation: 100uV/mA
• Input Voltage (max): 36V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 8
• Package Type: CDIP
• Lead Free Status / Rohs Status: Not Compliant

AD587
In some applications, a varying load may be both resistive and
capacitive in nature, or the load may be connected to the
AD587 by a long capacitive cable.
Figure 14 displays the output amplifier characteristics driving a
1000 pF, 0 mA to 10 mA load.
LOAD REGULATION
The AD587 has excellent load regulation characteristics.
Figure 15 shows that varying the load several mA changes the
output by only a few µV.
C
L
= 1000pF
V
OUT
V
C
L
Figure 13. Capacitive Load Transient/Response Test Circuit
L
= 0
V
100
0%
L
90
10
Figure 14. Output Response with Capacitive Load
7.0V
100
Figure 12. Fine Scale Setting for Transient Load
0%
90
10
10V
10V
AD587
1mV
200mV
C
1000pF
L
V
L
1kΩ
2µs
10V
0V
1µs
V
OUT
Rev. G | Page 8 of 12
10.100
10.000
TEMPERATURE PERFORMANCE
The AD587 is designed for precision reference applications
where temperature performance is critical. Extensive tempera-
ture testing ensures that the device’s high level of performance is
maintained over the operating temperature range.
Some confusion exists in the area of defining and specifying
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
Celsius, such as ppm/°C. However, because of nonlinearities in
temperature characteristics that originated in standard Zener
references (such as S type characteristics), most manufacturers
have begun to use a maximum limit error band approach to
specify devices. This technique involves the measurement of the
output at three or more different temperatures to specify an
output voltage error band.
Figure 16 shows the typical output voltage drift for the AD587L
and illustrates the test methodology. The box in Figure 16 is
bounded on the sides by the operating temperature extremes
and on the top and the bottom by the maximum and minimum
output voltages measured over the operating temperature range.
The slope of the diagonal drawn from the lower left to the
upper right corner of the box determines the performance
grade of the device.
–20
Figure 15. Typical Load Regulation Characteristics
–6
Figure 16. Typical AD587L Temperature Drift
T
MIN
0
–4
TEMPERATURE (°C)
–2
20
0
40
∆V
1000
500
–500
–1000
OUT
2
(µV)
60
4
T
MAX
6
80
8
10
SLOPE = T.C. =
(T
V
V
MAX
MIN
MAX
LOAD (mA)
V
– T
MAX
MIN
– V
) × 10 × 10
MIN
6