2-Terminal IC
1.2 V Reference
AD589
FEATURES
Superior Replacement for Other 1.2 V References
Wide Operating Range: 50 A to 5 mA
Low Power: 60 W Total PD at 50 A
Low Temperature Coefficient:
10 ppm/C Max, 0C to 70C (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
SOIC (R-8)
Metal Can (H-02)
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1
8
2
7
3
+V
6
–V 4
AD589
5
TOP VIEW
(Not to Scale)
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PRODUCT DESCRIPTION
PRODUCT HIGHLIGHTS
The AD589 is a 2-terminal, low cost, temperature compensated
band gap voltage reference that provides a fixed 1.23 V 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.
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 technology 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 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 available in a metal can (H-02) package. The AD589J is also available
in an 8-lead SOIC package.
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.
3. The AD589 can be operated as a positive or negative reference. 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 sensitivity to capacitive loading.
6. The AD589 is available in versions compliant with MILSTD-883. Consult factory for 883 data sheet.
REV. C
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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks
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