AD586

Rev. G | Page 10 of 16

Figure 18 shows the typical output voltage drift for the AD586L

and illustrates the test methodology. The box in Figure 18 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

0

20

40

60

80

5.003

5.000

TEMPERATURE (

°C)



SLOPE

SLOPE = T.C. =

=

= 4.3ppm/

°C

5.0027 – 5.0012

(70

Figure 18. Typical AD586L Temperature Drift

Each AD586J, AD586K, and AD586L grade unit is tested at 0°C,

25°C, and 70°C. Each AD586SQ and AD586TQ grade unit is

tested at −55°C, +25°C, and +125°C. This approach ensures that

the variations of output voltage that occur as the temperature

changes within the specified range will be contained within a

box whose diagonal has a slope equal to the maximum specified

drift. The position of the box on the vertical scale will change

from device to device as initial error and the shape of the curve

vary. The maximum height of the box for the appropriate tem-

perature range and device grade is shown in Table 5. Dupli-

cation of these results requires a combination of high accuracy

and stable temperature control in a test system. Evaluation of

the AD586 will produce a curve similar to that in Figure 18, but

output readings could vary depending on the test methods and

equipment used.

Table 5. Maximum Output Change in mV

Maximum Output Change (mV)

Device

Grade

0°C to 70°C

−40°C to +85°C

−55°C to +125°C

AD586J

8.75

AD586K

5.25

AD586L

1.75

AD586M

0.70

AD586A

9.37

AD586B

3.12

AD586S

18.00

AD586T

9.00

NEGATIVE REFERENCE VOLTAGE FROM AN AD586

The AD586 can be used to provide a precision −5.000 V output,

the output pin is grounded, and the AD586 ground pin is con-

so that the net current through the AD586 is between 2.5 mA

and 10.0 mA. The temperature characteristics and long-term

stability of the device will be essentially the same as that of a

unit used in the standard +5 V output configuration.

AD586

GND

+6V

→ +30V

2.5mA <

10V

–5V

–15V

2

4

6

Figure 19. AD586 as a Negative 5 V Reference

USING THE AD586 WITH CONVERTERS

The AD586 is an ideal reference for a wide variety of 8-, 12-, 14-,

and 16-bit ADCs and DACs. Several representative examples are

explained in the following sections.