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부품번호 | AD589 기능 |
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기능 | Two-Terminal IC 1.2 V Reference | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 4 페이지수
a
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, 0؇C to +70؇C (AD589M)
25 ppm/؇C max, –55؇C to +125؇C (AD589U)
Two-Terminal “Zener” Operation
Low Output Impedance: 0.6 ⍀
No Frequency Compensation Required
Low Cost
MIL-STD-883 Compliant Versions Available
Two-Terminal IC
1.2 V Reference
AD589
FUNCTIONAL BLOCK DIAGRAMS
SOIC (SO-8)
Metal Can (H-02A)
1
2
3
–V 4
AD589
TOP VIEW
8 +V
7
6
5
+V
–V
BOTTOM VIEW
PRODUCT DESCRIPTION
The 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.
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
ten times lower than 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, 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. The AD589J is also available in an 8-pin
SOIC package.
PRODUCT HIGHLIGHTS
1. The AD589 is a two-terminal device which delivers a
constant reference voltage for a wide range of input
current.
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. The AD589 can be operated as a positive or negative
reference. “Floating” operation is also possible.
4. The AD589 will operate with total current as low as 50 µA
(60 µW total power dissipation), ideal for battery powered
instrument applications.
5. The AD589 is an exact replacement for other 1.2 V ref-
erences, offering superior temperature performance and
reduced sensitivity to capacitive loading.
6. The AD589 is available in versions compliant with MIL-
STD-883. Refer to the Analog Devices Military Products
Databook or current AD589/883B data sheet for detailed
specifications.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
AD589
APPLICATION INFORMATION
The 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.
6.8kΩ
+5V
AD589
10kΩ
VOUT
Figure 5. Basic Configuration for 1.2 V or Less
The 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. Total supply current for this
circuit is approximately 2 mA.
AD589
15kΩ
+15V
7
2
AD108A
3
1
4
6
8
0.01µF
1kΩ
1kΩ
8.2kΩ
10V
AD589
6.2kΩ
10kΩ
1kΩ
+5V
+V
7107
REF HI
REF LO
COMMON
b. With 7107 Panel Meter A/D
Figure 7. AD589 Used as Reference for CMOS
A/D Converters
The AD589 also is useful as a reference for CMOS multiplying
DACs such as the AD7533. These 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.
BIT BIT
1 2 3 4 5 6 7 8 9 10
MSB
LSB
AD589
R1
39kΩ
–15V
+15V
VDD
14
REF
15
R2
5kΩ
GND
3
2
OUT2
AD7533 SERIES
1
OUT1
16
RFB
AD542L
VOUT =
0 TO 1.00V
Figure 6. Single Supply Buffered 10 V Reference
The 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.
AD589
5.6kΩ
6.8kΩ
2kΩ
+5V
+V
7109
REF+
REF–
REF OUT
a. With 7109 12-Bit Binary A/D
Figure 8. AD589 as Reference for 10-Bit CMOS DAC
OUTLINE DIMENSIONS AND PIN DESIGNATIONS
Dimensions shown in inches and (mm).
0.10 (2.54)
0.195 (4.95)
0.178 (4.52) DIA
45°
0.036 (0.91)
0.046 (1.17)
0.028 (0.71)
0.048 (1.22)
0.015 (0.38)
0.019 (0.48)
0.209 (5.31)
0.230 (5.84) DIA
0.150 (3.81)
0.125 (3.17)
0.500 (12.7)
MIN
–4– REV. B
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |