AD589U [ADI]
Two-Terminal IC 1.2 V Reference; 双端IC 1.2 V参考
| 型号： | AD589U |
| 厂家： | 
ADI |
| 描述： | Two-Terminal IC 1.2 V Reference |
| 文件： | 总4页 (文件大小：101K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Two-Terminal IC
1.2 V Reference
a
AD589
FUNCTIO NAL BLO CK D IAGRAMS
FEATURES
Superior Replacem ent for Other 1.2 V References
Wide Operating Range: 50 A to 5 m A
Low Pow er: 60 W Total PD at 50 A
Low Tem perature Coefficient:
SO IC (SO -8)
Metal Can (H -02A)
+V
1
8
+V
10 ppm / ؇C m ax, 0؇C to +70؇C (AD589M)
25 ppm / ؇C m ax, –55؇C to +125؇C (AD589U)
Tw o-Term inal “Zener” Operation
Low Output Im pedance: 0.6 ⍀
No Frequency Com pensation Required
Low Cost
2
3
4
7
6
5
–V
–V
AD589
TOP VIEW
BOTTOM VIEW
MIL-STD-883 Com pliant Versions Available
P RO D UCT D ESCRIP TIO N
P RO D UCT H IGH LIGH TS
T he AD589 is a two-terminal, low cost, temperature compen-
sated bandgap voltage reference which provides a fixed 1.23 V
output voltage for input currents between 50 µA and 5.0 mA.
1. T he AD589 is a two-terminal device which delivers a
constant reference voltage for a wide range of input
current.
T he high stability of the AD589 is primarily dependent upon
the matching and thermal tracking of the on-chip components.
Analog Devices’ precision bipolar processing and thin-film
technology combine to provide excellent performance at low
cost.
2. Output impedance of 0.6 Ω and temperature coefficients as
low as 10 ppm/°C insure stable output voltage over a wide
range of operating conditions.
3. T he AD589 can be operated as a positive or negative
reference. “Floating” operation is also possible.
Additionally, the active circuit produces an output impedance
ten times lower than typical low-T C Zener diodes. T his feature
allows operation with no external components required to
maintain full accuracy under changing load conditions.
4. T he AD589 will operate with total current as low as 50 µA
(60 µW total power dissipation), ideal for battery powered
instrument applications.
5. T he AD589 is an exact replacement for other 1.2 V ref-
erences, offering superior temperature performance and
reduced sensitivity to capacitive loading.
T he AD589 is available in seven versions. T he AD589J, K, L
and M grades are specified for 0°C to +70°C operation, while
the S, T , and U grades are rated for the full –55°C to +125°C
temperature range. All grades are available in a metal can
(H-02A) package. T he AD589J is also available in an 8-pin
SOIC package.
6. T he AD589 is available in versions compliant with MIL-
ST D-883. Refer to the Analog Devices Military Products
Databook or current AD589/883B data sheet for detailed
specifications.
REV. B
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 617/ 329-4700
Fax: 617/ 326-8703
(typical @ IIN = 500 A and T = +25؇C unless otherwise noted)
A
AD589–SPECIFICATIONS
Model
AD 589JH /JR
Typ Max
AD 589KH
Typ
AD 589LH
AD 589MH
Typ Max
Min
Min
Max
Min
Typ Max
Min
Unit
OUT PUT VOLT AGE, TA = +25°C
1.200 1.235 1.250
1.200 1.235
1.250 1.200
1.235 1.250
1.200 1.235 1.250
V
OUT PUT VOLT AGE CHANGE vs.
CURRENT
(50 µA–5 mA)
5
5
2
5
5
mV
DYNAMIC OUT PUT IMPEDANCE
0.6
5
2
0.6
5
0.6
5
2
0.6
5
2
Ω
RMS NOISE VOLT AGE
10 Hz < f < 10 kHz
µV
T EMPERAT URE COEFFICIENT1
T URN-ON SET T LING T IME T O 0.1%
OPERAT ING CURRENT2
100
50
25
10
ppm/°C
µs
25
25
25
25
0.05
5
0.05
5
0.05
5
0.05
5
mA
°C
OPERAT ING T EMPERAT URE
0
+70
0
+70
0
+70
0
+70
PACKAGE OPT ION3
Metal Can (H-02A)
SOIC (R-8)
AD589JH
AD589JR
AD589KH
AD589LH
AD589MH
Model
AD 589SH
Typ
AD 589TH
Typ
AD 589UH
Min
Max
Min
Max
Min
Typ Max
Unit
OUT PUT VOLT AGE, TA = +25°C
1.200 1.235 1.250
1.200 1.235
1.250 1.200
1.235 1.250
V
OUT PUT VOLT AGE CHANGE vs.
CURRENT
(50 µA–5 mA)
5
5
2
5
mV
DYNAMIC OUT PUT IMPEDANCE
0.6
5
2
0.6
5
0.6
5
2
Ω
RMS NOISE VOLT AGE
10 Hz < f < 10 kHz
µV
T EMPERAT URE COEFFICIENT1
T URN-ON SET T LING T IME T O 0.1%
OPERAT ING CURRENT2
100
50
25
ppm/°C
µs
25
25
0.05
25
0.05
5
5
0.05
5
mA
°C
OPERAT ING T EMPERAT URE
–55
+125
–55
+125 –25
+125
PACKAGE OPT ION3
Metal Can (H-02A)
SOIC (SO-8)
AD589SH
AD589JR
AD589T H
AD589UH
NOT ES
1See the following page for explanation of temperature coefficient measurement method.
2Optimum performance is obtained at currents below 500 µA. For current operation below 200 µA, stray shunt capacitances should be limited
to 20 pF or increased to 1µF. If strays can not be avoided, operation at 500 µA and a shunt capacitor of at least 1000 pF are recommended.
3H = Hermetic Metal Can; SO = SOIC.
Specifications shown in boldface are tested on all production units at final electrical test.
Specifications subject to change without notice.
AD 589 CH IP D IMENSIO NS AND P AD LAYO UT
ABSO LUTE MAXIMUM RATINGS
Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Reverse Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Power Dissipation1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 mW
Storage T emperature . . . . . . . . . . . . . . . . . . . –65°C to +175°C
Operating Junction T emperature Range . . . . –55°C to +150°C
Lead T emperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C
0.040
(1.016)
NOT E
1Absolute maximum power dissipation is limited by maximum current through the
device. Maximum rating at elevated temperatures must be computed assuming
T J ≤ 150°C, and θJA = 400 = C/W.
0.060
(1.524)
THE AD589 IS AVAILABLE IN CHIP FORM WITH FULLY TESTED
AND GUARANTEED SPECIFICATIONS. CONSULT FACTORY FOR
AVAILABLE GRADES AND PRICING.
–2–
REV. B
Understanding the Specifications–AD589
VO LTAGE VARIATIO N VS. TEMP ERATURE
D YNAMIC P ERFO RMANCE
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
Centigrade; i.e., 10 ppm/°C. However, because of nonlinearities
in temperature characteristics, which 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. T his technique involves measure-
ment of the output at 3, 5 or more different temperatures to
guarantee that the output voltage will fall within the given error
band. T he temperature characteristics of the AD589 consis-
tently follows the curve shown in Figure 1. T hree-point
measurement guarantees the error band over the specified
temperature range. T he temperature coefficients specified on
the previous page represent the slopes of the diagonals of the
Many low power instrument manufacturers are becoming
increasingly concerned with the turn-on characteristics of the
components being used in their systems. Fast turn-on compo-
nents often enable the end user to keep power off when not
needed, and yet respond quickly when the power is turned on
for operation. Figure 3 displays the turn-on characteristics of the
AD589. T his characteristic is generated from cold-start opera-
tion and represents the true turn-on waveform after an extended
period with the supplies off. T he figure shows both the coarse
and fine transient characteristics of the device; the total settling
time to within ±1 millivolt is about 25 µs, and there is no long
thermal tail appearing after that point.
200mV
10mV
10µs
error band from +25°C to TMIN and +25°C to T MAX
.
100
90
1.2370
1.2365
10
0%
1.2360
1.2355
Figure 3. Output Settling Characteristics
+V
1.2350
R1
R5
R6
Q5
1.2345
–50
–25
0
+25
+50
+75
+100
+125
Q8
TEMPERATURE – °C
R7
Q2
C1
R2
R3
Figure 1. Typical AD589 Tem perature Characteristics
Q9
Q3
Q4
Q7
1000
Q1
R4
–V
Figure 4. Schem atic Diagram
100
10
0
10
100
1k
10k
100k
1M
FREQUENCY – Hz
Figure 2. Noise Spectral Density
REV.B
–3–
AD589
+5V
AP P LICATIO N INFO RMATIO N
6.2kΩ
T he AD589 functions as a two-terminal shunt-type regulator. It
provides a constant 1.23 V output for a wide range of input
current from 50 µA to 5 mA. Figure 5 shows the simplest
configuration for an output voltage of 1.2 V or less. Note that
no frequency compensation is required. If additional filtering is
desired for ultralow noise applications, minimum recommended
capacitance is 1000 pF.
+V
10kΩ
1kΩ
7107
AD589
REF HI
REF LO
COMMON
+5V
b. With 7107 Panel Meter A/D
6.8kΩ
Figure 7. AD589 Used as Reference for CMOS
A/D Converters
AD589
10kΩ
T he AD589 also is useful as a reference for CMOS multiplying
DACs such as the AD7533. T hese DACs require a negative
reference voltage in order to provide a positive output range.
Figure 8 shows the AD589 used to supply an equivalent –1.0 V
reference to an AD7533.
VOUT
Figure 5. Basic Configuration for 1.2 V or Less
T he AD589 can also be used as a building block to generate
other values of reference voltage. Figure 6 shows a circuit which
produces a buffered 10 V output. T otal supply current for this
circuit is approximately 2 mA.
BIT
1
BIT
10
2
3
4
5
6
7
8
9
MSB
LSB
V
DD
AD589
14
15
+15V
AD589
REF
AD7533 SERIES
+15V
R2
5kΩ
7
15kΩ
2
R1
39kΩ
GND
3
6
AD108A
2
1
16
R
8
3
10V
–15V
1
OUT2
OUT1
FB
1kΩ
4
0.01µF
V
=
OUT
0 TO 1.00V
1kΩ
AD542L
8.2kΩ
Figure 8. AD589 as Reference for 10-Bit CMOS DAC
Figure 6. Single Supply Buffered 10 V Reference
T he low power operation of the AD589 makes it ideal for use in
battery operated portable equipment. It is especially useful as a
reference for CMOS analog-to-digital converters. Figure 7
shows the AD589 used in conjunction with two popular
integrating type CMOS A/D converters.
O UTLINE D IMENSIO NS AND P IN D ESIGNATIO NS
D imensions shown in inches and (mm).
0.209 (5.31)
0.230 (5.84)
DIA
0.10 (2.54)
0.195 (4.95)
0.178 (4.52)
DIA
+5V
5.6kΩ
0.150 (3.81)
0.125 (3.17)
+V
45°
6.8kΩ
7109
0.028 (0.71)
0.048 (1.22)
AD589
REF+
2kΩ
0.500 (12.7)
MIN
REF–
0.015 (0.38)
0.019 (0.48)
0.036 (0.91)
0.046 (1.17)
REF OUT
a. With 7109 12-Bit Binary A/D
–4–
REV. B
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