FUNCTIONAL BLOCK DIAGRAMS
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 Coefficient:
10 ppm/
C Max, 0
C to 70
C (AD589M)
2-Terminal Zener Operation
Low Output Impedance: 0.6
No Frequency Compensation Required
SOIC (R-8)
Metal Can (H-02)
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1
2
3
4
8 +V
7
6
5
–V
AD589
TOP VIEW
(Not to Scale)
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MIL-STD-883 Compliant Versions Available
The AD589 is a 2-terminal, low cost, temperature compensated
band gap voltage reference that provides a fixed 1.23V output
voltage for input currents between 50 A and 5.0 mA.
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 coefficients as
low as 10 ppm/°C ensure stable output voltage over a wide
range of operating conditions.
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-film tech-
nology combine to provide excellent performance at low cost.
3. The AD589 can be operated as a positive or negative refer-
ence. Floating operation is also possible.
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.
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 1.2V references,
offering superior temperature performance and reduced sensi-
tivity to capacitive loading.
The AD589 is available in seven versions. The AD589J, AD589K,
AD589L, and AD589M grades are specified 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.
6. The AD589 is available in versions compliant with MIL-
STD-883. Consult factory for 883 data sheet.
REV. C
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