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AD589JHADN/a2350avaiTwo-Terminal IC 1.2 V Reference
AD589JHADIN/a716avaiTwo-Terminal IC 1.2 V Reference
AD589JRADIN/a3927avaiTwo-Terminal IC 1.2 V Reference
AD589KHADN/a200avaiLC2MOS 5 us 8-Bit ADC with Track/Hold
AD589KH. |AD589KHADN/a1900avaiLC2MOS 5 us 8-Bit ADC with Track/Hold
AD589MHADN/a42avaiLC2MOS 5 us 8-Bit ADC with Track/Hold
AD589SHADN/a22avaiLC2MOS 5 us 8-Bit ADC with Track/Hold


AD589JR ,Two-Terminal IC 1.2 V ReferenceSPECIFICATIONSModel AD589JH/JR AD589KH AD589LH AD589MHMin Typ Max Min Typ Max Min Typ Max Min Typ ..
AD589JR-REEL ,Two-Terminal IC 1.2 V ReferenceFEATURES FUNCTIONAL BLOCK DIAGRAMSSuperior Replacement for Other 1.2 V ReferencesWide Operating Ran ..
AD589JRZ ,Two-Terminal IC 1.2 V ReferenceSPECIFICATIONS (Typical @ I = 500 A and T = 25C, unless otherwise noted.)IN AAD589JH/Model AD589J ..
AD589KH ,LC2MOS 5 us 8-Bit ADC with Track/Holdcharacteristics of themanufacturers have begun to use a maximum limit error bandAD589. This charact ..
AD589KH. ,LC2MOS 5 us 8-Bit ADC with Track/HoldSpecifications–AD589VOLTAGE VARIATION VS. TEMPERATURE DYNAMIC PERFORMANCESome confusion exists in t ..
AD589MH ,LC2MOS 5 us 8-Bit ADC with Track/Holdspecifications.REV. BInformation furnished by Analog Devices is believed to be accurate andreliable ..
AD9847AKST ,10-Bit 40 MSPS CCD Signal Processor with Integrated Timing DriverSPECIFICATIONS MIN MAX CLI Parameter Min Typ Max Unit NotesCDSGain 0 dBAllowable CCD Reset Transien ..
AD9847AKSTRL ,10-Bit 40 MSPS CCD Signal Processor with Integrated Timing DriverAPPLICATIONSDigital Still CamerasPackaged in a space-saving 48-lead LQFP, the AD9847 is speci-fied ..
AD9847AKSTZ ,10-Bit 40 MSPS CCD Signal Processor with Integrated Timing Driverapplications. The AD9847 includes a com-2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA) plete an ..
AD9848AKST ,10-Bit, 20 MHz CCD Signal Processor with Integrated Timing DriverSPECIFICATIONSParameter Min Typ Max UnitTEMPERATURE RANGEOperating –20 +85 °CStorage –65 +150 °CMAX ..
AD9848AKSTZ ,10-Bit, 20 MHz CCD Signal Processor with Integrated Timing Driverapplications. Both include a completeCorrelated Double Sampler (CDS) analog front end with A/D conv ..
AD9848KST ,CCD Signal Processors with Integrated Timing DriverAPPLICATIONS–20°C to +85°C.Digital Still CamerasFUNCTIONAL BLOCK DIAGRAMVRT VRBVREF46dB 2dB TO 36d ..


AD589JH-AD589JR-AD589KH-AD589KH.-AD589MH-AD589SH
Two-Terminal IC 1.2 V Reference
FUNCTIONAL BLOCK DIAGRAMS
SOIC (SO-8)Metal Can (H-02A)1
AD589
TOP VIEW
BOTTOM VIEW

REV.BTwo-Terminal IC
1.2 V Reference
FEATURES
Superior Replacement for Other 1.2 V References
Wide Operating Range: 50 mA to 5 mA
Low Power: 60 mW Total PD at 50 mA
Low Temperature Coefficient:
10 ppm/8C max, 08C to +708C (AD589M)
25 ppm/8C max, –558C to +1258C (AD589U)
Two-Terminal “Zener” Operation
Low Output Impedance: 0.6 V
No Frequency Compensation Required
Low Cost
MIL-STD-883 Compliant Versions Available
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
The AD589 is a two-terminal device which delivers a
constant reference voltage for a wide range of input
current.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.The AD589 can be operated as a positive or negative
reference. “Floating” operation is also possible.The AD589 will operate with total current as low as 50 μA
(60 μW total power dissipation), ideal for battery powered
instrument applications.The AD589 is an exact replacement for other 1.2 V ref-
erences, offering superior temperature performance and
reduced sensitivity to capacitive loading.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.
AD589–SPECIFICATIONS
(typical @ IIN = 500 mA and TA = +258C unless otherwise noted)
AD589 CHIP DIMENSIONS AND PAD LAYOUT

OUTPUT VOLTAGE CHANGE vs.
PACKAGE OPTION
NOTESSee the following page for explanation of temperature coefficient measurement method.Optimum performance is obtained at currents below 500 μA. For current operation below 200 μA, stray shunt capacitances should be limited
to 20 pF or increased to 1μF. If strays can not be avoided, operation at 500 μA and a shunt capacitor of at least 1000 pF are recommended.H = Hermetic Metal Can; SO = SOIC.
Specifications shown in boldface are tested on all production units at final electrical test.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS

Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Reverse Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Power Dissipation1 . . . . . . . . . . . . . . . . . . . . . . . . . . .125 mW
Storage Temperature . . . . . . . . . . . . . . . . . . .–65°C to +175°C
Operating Junction Temperature Range . . . .–55°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . .+300°C
NOTEAbsolute maximum power dissipation is limited by maximum current through the
device. Maximum rating at elevated temperatures must be computed assuming≤ 150°C, and θJA = 400 = C/W.
VOLTAGE VARIATION VS. TEMPERATURE
Some confusion exists in the area of defining and specifying
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
Centigrade; i.e., 10 ppm/°C. However, because of nonlinearities
in temperature characteristics, which originated in standard
Zener references (such as “S” type characteristics) most
manufacturers have begun to use a maximum limit error band
approach to specify devices. This technique involves measure-
ment of the output at 3, 5 or more different temperatures to
guarantee that the output voltage will fall within the given error
band. The temperature characteristics of the AD589 consis-
tently follows the curve shown in Figure 1. Three-point
measurement guarantees the error band over the specified
temperature range. The temperature coefficients specified on
the previous page represent the slopes of the diagonals of the
error band from +25°C to TMIN and +25°C to TMAX.
+125
+100+75+50+250
TEMPERATURE – °C
OUTPUT VOLTAGE – V

Figure 1.Typical AD589 Temperature Characteristics
1001001M100k10k1k
FREQUENCY – Hz
NOISE SPECTRAL DENSITY – nV/ Hz

Figure 2.Noise Spectral Density
DYNAMIC PERFORMANCE

Many low power instrument manufacturers are becoming
increasingly concerned with the turn-on characteristics of the
components being used in their systems. Fast turn-on compo-
nents often enable the end user to keep power off when not
needed, and yet respond quickly when the power is turned on
for operation. Figure 3 displays the turn-on characteristics of the
AD589. This characteristic is generated from cold-start opera-
tion and represents the true turn-on waveform after an extended
period with the supplies off. The figure shows both the coarse
and fine transient characteristics of the device; the total settling
time to within ±1 millivolt is about 25 μs, and there is no long
thermal tail appearing after that point.
Figure 3.Output Settling Characteristics
Figure 4.Schematic Diagram
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.
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
10V

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.With 7109 12-Bit Binary A/D
Figure 7.
A/DConverters
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.
Figure 8.
OUTLINE DIMENSIONS AND PIN DESIGNATIONS
0.10 (2.54)
45°
0.036 (0.91)
0.046 (1.17)
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