Datasheet AD586 (Analog Devices) - 10

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AD586
Figure 18 shows the typical output voltage drift for the AD586L
Table 5. Maximum Output Change in mV
and illustrates the test methodology. The box in Figure 18 is
Maximum Output Change (mV)
bounded on the sides by the operating temperature extremes
Device
and on the top and the bottom by the maximum and minimum
Grade 0°C to 70°C −40°C to +85°C −55°C to +125°C
output voltages measured over the operating temperature AD586J 8.75 range. The slope of the diagonal drawn from the lower left to AD586K 5.25 the upper right corner of the box determines the performance AD586L 1.75 grade of the device. AD586M 0.70 AD586A 9.37
VMAX –VMIN
AD586B 3.12
SLOPE = T.C. = (TMAX –TMIN)
×
5
×
10–6
AD586S 18.00
5.0027 – 5.0012 = (70
°
C – 0)
×
5
×
10–6
AD586T 9.00
= 4.3ppm/
°
C TMIN TMAX SLOPE NEGATIVE REFERENCE VOLTAGE FROM AN AD586 5.003 VMAX
The AD586 can be used to provide a precision −5.000 V output, as shown in Figure 19. The VIN pin is tied to at least a 6 V supply, the output pin is grounded, and the AD586 ground pin is con-
VMIN
nected through a resistor, RS, to a −15 V supply. The −5 V output is now taken from the ground pin (Pin 4) instead of VOUT. It is
5.000
essential to arrange the output load and the supply resistor, RS, so that the net current through the AD586 is between 2.5 mA and 10.0 mA. The temperature characteristics and long-term
–20 0 20 40 60 80 TEMPERATURE (
°
C)
00625-017 stability of the device will be essentially the same as that of a unit used in the standard +5 V output configuration. Figure 18. Typical AD586L Temperature Drift
+6V
→
+30V 10V 2.5mA < –I
Each AD586J, AD586K, and AD586L grade unit is tested at 0°C,
L < 10mA RS 2
25°C, and 70°C. Each AD586SQ and AD586TQ grade unit is
VIN
tested at −55°C, +25°C, and +125°C. This approach ensures that
AD586 VOUT 6
the variations of output voltage that occur as the temperature
GND
changes within the specified range will be contained within a
4 IL
box whose diagonal has a slope equal to the maximum specified
–5V
drift. The position of the box on the vertical scale will change
RS
from device to device as initial error and the shape of the curve
–15V
00529-018 vary. The maximum height of the box for the appropriate tem- Figure 19. AD586 as a Negative 5 V Reference perature range and device grade is shown in Table 5. Dupli- cation of these results requires a combination of high accuracy
USING THE AD586 WITH CONVERTERS
and stable temperature control in a test system. Evaluation of The AD586 is an ideal reference for a wide variety of 8-, 12-, 14-, the AD586 will produce a curve similar to that in Figure 18, but and 16-bit ADCs and DACs. Several representative examples are output readings could vary depending on the test methods and explained in the following sections. equipment used. Rev. G | Page 10 of 16 Document Outline FEATURES GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS AD586J, AD586K/AD586A, AD586L/AD586B AD586M, AD586S, AD586T ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLYING THE AD586 NOISE PERFORMANCE AND REDUCTION TURN-ON TIME DYNAMIC PERFORMANCE LOAD REGULATION TEMPERATURE PERFORMANCE NEGATIVE REFERENCE VOLTAGE FROM AN AD586 USING THE AD586 WITH CONVERTERS 5 V REFERENCE WITH MULTIPLYINGCMOS DACs OR ADCs STACKED PRECISION REFERENCES FORMULTIPLE VOLTAGES PRECISION CURRENT SOURCE PRECISION HIGH CURRENT SUPPLY OUTLINE DIMENSIONS ORDERING GUIDE