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
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