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AD589
2-Terminal IC
1.2 V Reference
FEATURES
Superior Replacement for Other 1.2 V References
Wide Operating Range: 50
A to 5 mA
Low Power: 60
W Total P
D
at 50
A
Low Temperature Coef cient:
10 ppm/
C Max, 0
C to 70
C (AD589M)
2-Terminal Zener Operation
Low Output Impedance: 0.6
No Frequency Compensation Required
Low Cost
MIL-STD-883 Compliant Versions Available
FUNCTIONAL BLOCK DIAGRAMS
PRODUCT DESCRIPTION
The AD589 is a 2-terminal, low cost, temperature compensated
band gap voltage reference that provides a xed 1.23 V output
voltage for input currents between 50
A and 5.0 mA.
The 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- lm tech-
nology combine to provide excellent performance at low cost.
Additionally, the active circuit produces an output impedance 10
lower than the typical low-TC Zener diodes. This feature allows
operation with no external components required to maintain full
accuracy under changing load conditions.
The AD589 is available in seven versions. The AD589J, AD589K,
AD589L, and AD589M grades are speci ed for 0°C to +70°C
operation, while the AD589S and AD589T grades are rated for
the full –55°C to +125°C temperature range. All grades are avail-
able in a metal can (H-02) package. The AD589J is also available
in an 8-lead SOIC package.
PRODUCT HIGHLIGHTS
1.
The AD589 is a 2-terminal device that delivers a constant
reference voltage for a wide range of input current.
2.
Output impedance of 0.6
and temperature coef cients as
low as 10 ppm/°C ensure stable output voltage over a wide
range of operating conditions.
3.
The AD589 can be operated as a positive or negative refer-
ence. Floating operation is also possible.
4.
The AD589 will operate with a total current as low as 50
A
(60
W total power dissipation), ideal for battery-powered
instrument applications.
5.
The AD589 is an exact replacement for other 1.2 V references,
offering superior temperature performance and reduced sensi-
tivity to capacitive loading.
6.
The AD589 is available in versions compliant with MIL-
STD-883. Consult factory for 883 data sheet.
SOIC (R-8)
AD589
TOP VIEW
(Not to Scale)
1
2
3
–V
4
+V
8
7
6
5
Metal Can (H-02)
REV. C
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