Micropower, Precision Series Mode Voltage References AD1582/AD1583/AD1
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FEATURES Series Reference (2.5 4.096 Quiescent Current: Current Output Capability: Wide Supply Range: VOUT Wideband Noise Hz-10 kHz): Specified Temperature Range: +125 Compact, Surface-Mount, SOT-23 Package AD158x Products, Three Electrical Grades
Micropower, Precision Series Mode Voltage References AD1582/AD1583/AD1584/AD1585
FUNCTIONAL BLOCK DIAGRAM 3-Lead SOT-23 Suffix)
VOUT
AD1582/ AD1583/ AD1584/ AD1585
VIEW
Electrical Grade Initial Accuracy AD1582 0.08% 0.16% 0.80% AD1583/AD1585 0.10% 0.20% 1.00% AD1584 0.10% 0.20% 0.98%
Tempco (ppm
TARGET APPLICATIONS
Portable, battery-powered equipment. Notebook computers, cellular phones, pagers, PDAs, GPSs, DMMs. Computer workstations. Suitable with wide range video RAMDACs. Smart industrial transmitters PCMCIA cards Automotive Hard disk drives 8-bit/12-bit data converters
ISUPPLY
GENERAL DESCRIPTION
AD1582, AD1583, AD1584, AD1585 family cost, power, dropout, precision band references. These designs available three-terminal (series) devices packaged compact SOT-23, 3-lead, surface-mount package. versatility these references makes them ideal battery-powered systems where there wide variations supply voltage need minimize power dissipation. superior accuracy temperature stability AD1582/ AD1583/AD1584/AD1585 made possible precise matching thermal tracking on-chip components. Patented temperature drift curvature correction design techniques minimize nonlinearities voltage output temperature characteristic. These series mode devices (AD1582/AD1583/AD1584/AD1585) source sink load current operate efficiently with only required headroom supply. This family draws maximum quiescent current with only µA/V variation with supply voltage. advantage these designs over conventional shunt devices extraordinary. Valuable supply current longer wasted through input series resistor maximum power efficiency achieved input voltage levels. AD1582, AD1583, AD1584, AD1585 available three grades, which provided tiny footprint, SOT-23. grades specified over industrial temperature range -40°C +125°C.
SHUNT REFERENCE*
AD1582 SERIES REFERENCE
VSUPPLY
SOURCE RESISTOR
*3.076k
Figure Supply Current Supply Voltage
REV.
Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties that result from use. license granted implication otherwise under patent patent rights Analog Devices. Technology Way, P.O. 9106, Norwood, 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 2003
AD1582/AD1583/AD1584/AD1585
AD1582-SPECIFICATIONS
TMAX,
unless otherwise noted.)
AD1582B AD1582C Unit
Parameter OUTPUT VOLTAGE 25°C) INITIAL ACCURACY ERROR 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCV -40°C +125°C 70°C MINIMUM SUPPLY HEADROOM (VIN-VOUT) LOAD REGULATION IOUT (-40°C +85°C) IOUT (-40°C +125°C) IOUT (-40°C +85°C) IOUT (-40°C +125°C) -0.1 IOUT +0.1 (-40°C +85°C) -0.1 IOUT +0.1 (-40°C +125°C) LINE REGULATION VOUT IOUT RIPPLE REJECTION (VOUT/VIN) QUIESCENT CURRENT SHORT CIRCUIT CURRENT GROUND NOISE VOLTAGE 25°C) TURN-ON SETTLING TIME 0.1%, LONG-TERM STABILITY 1000 Hours 25°C OUTPUT VOLTAGE HYSTERESIS TEMPERATURE RANGE Specified Performance Operating Performance
Specifications subject change without notice.
AD1582A
2.480 2.500 2.520 2.498 2.500 2.502 2.496 2.500 2.504 -0.80 +0.80 -0.08 0.25 0.45 0.25 0.45 +0.08 -0.16 0.25 0.45 +0.16 ppm/°C ppm/°C ppm/°C mV/mA mV/mA mV/mA mV/mA mV/mA mV/mA
+125 +125
+125 +125
µV/V
ppm/1000 hrs.
+125 +125
REV.
AD1582/AD1583/AD1584/AD1585
AD1583-SPECIFICATIONS
TMAX, unless otherwise noted.)
AD1583B AD1583C Unit
Parameter OUTPUT VOLTAGE 25°C) INITIAL ACCURACY ERROR 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCV -40°C +125°C 70°C MINIMUM SUPPLY HEADROOM (VIN -VOUT) LOAD REGULATION IOUT (-40°C +85°C) IOUT (-40°C +125°C) IOUT (-40°C +85°C) IOUT (-40°C +125°C) -0.1 IOUT +0.1 (-40°C +85°C) -0.1 IOUT +0.1 (-40°C +125°C) LINE REGULATION VOUT IOUT RIPPLE REJECTION (VOUT/VIN) QUIESCENT CURRENT SHORT CIRCUIT CURRENT GROUND NOISE VOLTAGE 25°C) TURN-ON SETTLING TIME 0.1% LONG-TERM STABILITY 1000 Hours 25°C OUTPUT VOLTAGE HYSTERESIS TEMPERATURE RANGE Specified Performance Operating Performance
Specifications subject change without notice.
AD1583A 2.970 3.000 -1.0
3.030 2.997 3.000 3.003 2.994 3.000 3.006 +1.0 -0.1 +0.1 0.25 0.45 0.40 0.25 0.45 0.40 0.25 0.45 0.40 -0.20 +0.20 ppm/°C ppm/°C ppm/°C mV/mA mV/mA mV/mA mV/mA mV/mA mV/mA
+125 +125
+125 +125
µV/V
ppm/1000 hrs.
+125 +125
REV.
AD1582/AD1583/AD1584/AD1585
AD1584-SPECIFICATIONS
TMAX, unless otherwise noted.)
AD1584B AD1584C Unit
Parameter OUTPUT VOLTAGE 25°C) INITIAL ACCURACY ERROR 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCV -40°C +125°C 70°C MINIMUM SUPPLY HEADROOM (VIN -VOUT) LOAD REGULATION IOUT (-40°C +85°C) IOUT (-40°C +125°C) IOUT (-40°C +85°C) IOUT (-40°C +125°C) -0.1 IOUT +0.1 (-40°C +85°C) -0.1 IOUT +0.1 (-40°C +125°C) LINE REGULATION VOUT IOUT RIPPLE REJECTION (VOUT/VIN) Hz)2 QUIESCENT CURRENT SHORT CIRCUIT CURRENT GROUND NOISE VOLTAGE 25°C) TURN-ON SETTLING TIME 0.1% LONG-TERM STABILITY 1000 Hours 25°C OUTPUT VOLTAGE HYSTERESIS TEMPERATURE RANGE Specified Performance Operating Performance
Specifications subject change without notice.
AD1584A 4.056 4.096 -0.98
4.136 4.092 4.096 4.100 4.088 4.096 4.104 +0.98 -0.1 +0.1 0.32 0.52 0.40 0.32 0.52 0.40 0.32 0.52 0.40 -0.2 +0.2 ppm/°C ppm/°C ppm/°C mV/mA mV/mA mV/mA mV/mA mV/mA mV/mA
+125 +125
+125 +125
µV/V
ppm/1000 hrs.
+125 +125
REV.
AD1582/AD1583/AD1584/AD1585
AD1585-SPECIFICATIONS
Parameter OUTPUT VOLTAGE 25°C) INITIAL ACCURACY ERROR 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCV -40°C +125°C 70°C MINIMUM SUPPLY HEADROOM (VIN-VOUT) LOAD REGULATION IOUT (-40°C +85°C) IOUT (-40°C +125°C) IOUT (-40°C +85°C) IOUT (-40°C +125°C) -0.1 IOUT +0.1 (-40°C +85°C) -0.1 IOUT +0.1 (-40°C +125°C) LINE REGULATION VOUT IOUT RIPPLE REJECTION (VOUT/VIN) QUIESCENT CURRENT SHORT CIRCUIT CURRENT GROUND NOISE VOLTAGE 25°C) TURN-ON SETTLING TIME 0.1% LONG-TERM STABILITY 1000 Hours 25°C OUTPUT VOLTAGE HYSTERESIS TEMPERATURE RANGE Specified Performance Operating Performance
Specifications subject change without notice.
TMIN TMAX, unless otherwise noted.)
AD1585B AD1585C Unit
AD1585A 4.950 5.000 -1.0
5.050 4.995 5.000 5.005 4.990 5.000 5.010 +1.0 -0.10 +0.10 -0.20 0.40 0.40 0.40 0.40 0.40 0.40 +0.20 ppm/°C ppm/°C ppm/°C mV/mA mV/mA mV/mA mV/mA mV/mA mV/mA
+125 +125
+125 +125
µV/V
ppm/1000 hrs.
+125 +125
REV.
AD1582/AD1583/AD1584/AD1585
ABSOLUTE MAXIMUM RATINGS PACKAGE BRANDING INFORMATION
Ground Internal Power Dissipation2 SOT-23 (RT) Storage Temperature Range -65°C +125°C Specified Temperature Range AD1582RT/AD1583RT/, AD1584RT/AD1585RT -40°C +125°C Lead Temperature, Soldering Vapor Phase sec) 215°C Infrared sec) 220°C
NOTES Stresses above those listed under Absolute Maximum Ratings cause permanent damage device. This stress rating only; functional operation device these other conditions above those indicated operational section this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Specification device free 25°C: SOT-23 package: 300°C/W.
Four fields identify device: First field, product identifier, example, "2/3/4/5" identifies generic AD1582/AD1583/AD1584/AD1585 Second field, device grade, which "A," "B," Third field, calendar year processing, 1997., 2001. Fourth field, week window within calendar year, example, letters represent two-week window starting with first weeks January.
CAUTION (electrostatic discharge) sensitive device. Electrostatic charges high 4000 readily accumulate human body test equipment discharge without detection. Although AD1582/AD1583/AD1584/AD1585 feature proprietary protection circuitry, permanent damage occur devices subjected high energy electrostatic discharges. Therefore, proper precautions recommended avoid performance degradation loss functionality. ORDERING GUIDE
WARNING!
SENSITIVE DEVICE
Model AD1582ART-Reel AD1582ART-Reel7 AD1582BRT-Reel AD1582BRT-Reel7 AD1582CRT-Reel AD1582CRT-Reel7 AD1583ART-Reel AD1583ART-Reel7 AD1583BRT-Reel AD1583BRT-Reel7 AD1583CRT-Reel AD1583CRT-Reel7 AD1584ART-Reel AD1584ART-Reel7 AD1584BRT-Reel AD1584BRT-Reel7 AD1584CRT-Reel AD1584CRT-Reel7 AD1585ART-Reel AD1585ART-Reel7 AD1585BRT-Reel AD1585BRT-Reel7 AD1585CRT-Reel AD1585CRT-Reel7
Output Voltage 2.50 2.50 2.50 2.50 2.50 2.50 3.00 3.00 3.00 3.00 3.00 3.00 4.096 4.096 4.096 4.096 4.096 4.096 5.00 5.00 5.00 5.00 5.00 5.00
Accuracy (mV)
Initial Accuracy 0.80% 0.80% 0.08% 0.08% 0.16% 0.16% 1.00% 1.00% 0.10% 0.10% 0.20% 0.20% 0.98% 0.98% 0.10% 0.10% 0.20% 0.20% 1.00% 1.00% 0.10% 0.10% 0.20% 0.20%
Initial Temperature Coefficient
Package Description SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOT-23
Package Option RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3 RT-3
Mark 2A0A 2A0A 2B0A 2B0A 2C0A 2C0A 3A0A 3A0A 3B0A 3B0A 3C0A 3C0A 4A0A 4A0A 4B0A 4B0A 4C0A 4C0A 5A0A 5A0A 5B0A 5B0A 5C0A 5C0A
Number Parts Reel 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000 10,000 3,000
REV.
AD1582/AD1583/AD1584/AD1585
PARAMETER DEFINITION Temperature Coefficient (TCV Thermal Hysteresis (VO_HYS)
change output voltage over operating temperature change normalized output voltage expressed ppm/ equation follows:
TCVO
Where: VO(25
(25°C
change output voltage after device cycled through temperatures from +85°C back This typical value from sample parts through such cycle:
(25°C ppm]
(25°C (25°C
Where:
VO(T1) temperature1 VO(T2) temperature2
Line Regulation /VIN)
VO(25 VO_TC after temperature cycle back
Operating Temperature
change output voltage specified change input voltage. includes effects self-heating. Line regulation expressed either percent volt, parts-per-million volt, microvolts volt change input voltage.
Load Regulation /ILOAD)
temperature extremes which device still function. Parts deviate from their specified performance outside specified temperature range.
change output voltage specified change load current. includes effects self-heating. Load Regulation expressed either microvolts milliampere, parts-per-million milliampere, output resistance.
Long-Term Stability (VO)
Typical shift output voltage sample parts subjected operation life test 1000 hours
Where: VO(t0) time
VO(t1) after 1000 hours operation
REV.
Performance Characteristics
0.40 0.35 0.30 AD1585 0.25
PARTS
ppm/
mV/mA
0.20 0.15 0.10 0.05
AD1582
Typical Output Voltage Temperature Drift Distribution
Load Regulation
PARTS -100% -0.60% -0.20% 0.20% VOUT ERROR 0.60% 1.00%
AD1582 AD1585
IOUT
Typical Output Voltage Error Distribution
Line Regulation ILOAD
2.504 2.502 2.498
1E+04
IOUT 1E+03 IOUT
VOUT
2.496 2.494 2.492 2.49 2.488
1E+02 1E+01
1E+02
1E+03 FREQUENCY
1E+04
1E+05
TEMPERATURE
Typical Temperature Drift Characteristic Curves
Noise Spectral Density
REV.
AD1582/AD1583/AD1584/AD1585
THEORY OPERATION
AD1582/AD1583/AD1584/AD1585 family uses band concept produce stable, temperature coefficient voltage references suitable high accuracy data acquisition components systems. This family precision references uses underlying temperature characteristics silicon transistor's base-emitter voltage forward-biased operating region. Under this condition, such transistors have mV/°C temperature coefficient (TC) that, when extrapolated absolute zero, 0°K, (with collector current proportional absolute temperature) approximates silicon band voltage. summing voltage that equal opposite temperature coefficient mV/°C with forward-biased transistor, almost zero reference developed. AD1582/ AD1583/AD1584/AD1585 simplified circuit diagram shown Figure such compensating voltage, derived driving transistors different current densities amplifying resultant difference (VBE-which positive TC). V1(VBG) then buffered amplified produce stable reference voltage outputs 4.096
AD1582/ AD1583/ AD1584/ AD1585
VOUT
Figure Typical Connection Diagram
TEMPERATURE PERFORMANCE
AD1582/AD1583/AD1584/AD1585 family references designed applications where temperature performance important. Extensive temperature testing characterization ensures that device's performance maintained over specified temperature range. error band guaranteed with AD1582/AD1583/AD1584/ AD1585 family maximum deviation from initial value 25°C. Thus, given grade AD1582/AD1583/AD1584/ AD1585, designer easily determine maximum total error summing initial accuracy temperature variation, e.g., AD1582BRT, initial tolerance temperature error band thus reference guaranteed from -40°C +125°C. Figure shows typical output voltage drift AD1582 illustrates methodology. Figure bounded x-axis operating temperature extremes. bounded y-axis maximum minimum output voltages observed over operating temperature range. slope diagonal drawn from initial output value 25°C output values +125°C -40°C determines performance grade device. Duplication these results requires test system that highly accurate with stable temperature control. Evaluation AD1582 produces curves similar those Figure output readings vary depending upon test methods test equipment used.
2.504
VOUT
Figure Simplified Schematic
APPLYING AD1582/AD1583/AD1584/AD1585
AD1582/AD1583/AD1584/AD1585 family series references that used many applications. achieve optimum performance with these references, only external components required. Figure shows AD1582 configured operation under loading conditions. With simple capacitor attached input capacitor applied output, devices achieve specified performance input voltage output current requirements. best transient response, capacitor parallel with capacitor. While output capacitor provide stable performance loading conditions, AD1582 operate under (-100 +100 current conditions with just output capacitor. capacitor input reduced this condition. Unlike conventional shunt reference designs, AD1582/ AD1583/AD1584/AD1585 family provides stable output voltages constant operating current levels. When properly decoupled, shown Figure these devices applied circuit provide superior power solutions.
2.502
VOUT
2.498
2.496
2.494
2.492
TEMPERATURE
Figure Output Voltage Temperature
REV.
AD1582/AD1583/AD1584/AD1585
VOLTAGE OUTPUT NONLINEARITY VERSUS TEMPERATURE
PARTS
When using voltage reference with data converters, important understand impact that temperature drift have converter's performance. nonlinearity reference output drift represents additional error that cannot easily calibrated overall system. better understand impact such drift have data converter, refer Figure where measured drift characteristic normalized endpoint average drift. residual drift error AD1582 approximately demonstrates that this family references compatible with systems that require 12-bit accurate temperature performance.
-700
-450
-200
Figure Output Voltage Hysteresis Distribution
SUPPLY CURRENT VERSUS TEMPERATURE
VOUT
quiescent current AD1582/AD1583/AD1584/AD1585 family references varies slightly over temperature input supply range. Figure demonstrates typical performance AD1582 reference when varying both temperature supply voltage. evident from graph, AD1582 supply current increases only µA/V, making this device extremely attractive applications where there wide variations supply voltage need minimize power dissipation.
TEMPERATURE
Figure Residual Drift Error
OUTPUT VOLTAGE HYSTERESIS
High performance industrial equipment manufacturers require AD1582/AD1583/AD1584/AD1585 family maintain consistent output voltage error 25°C after references operated over full temperature range. While references exhibit characteristic known output voltage hysteresis, AD1582/AD1583/AD1584/AD1585 family designed minimize this characteristic. This phenomenon quantified measuring change +25°C output voltage after temperature excursions from +125°C +25°C, from -40°C +25°C. Figure displays distribution AD1582 output voltage hysteresis.
Figure Typical Supply Current over Temperature
SUPPLY VOLTAGE
ideal features AD1582/AD1583/AD1584/AD1585 supply voltage headroom. part operate supply voltage above VOUT However, negative voltage inadvertently applied with respect ground negative transient, coupled device damaged.
-10-
REV.
AD1582/AD1583/AD1584/AD1585
PERFORMANCE
AD1582
apply AD1582/AD1583/AD1584/AD1585 family references, important understand effects dynamic output impedance power supply rejection. Figure voltage divider formed AD1582's output impedance external source impedance. Figure shows effect varying load capacitor reference output. Power supply rejection ratio (PSRR) should determined when characterizing performance series voltage reference. Figure shows test circuit used measure PSRR, Figure demonstrates AD1582's ability attenuate line voltage ripple.
VLOAD VOUT
PSRR
AD1585 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 FREQUENCY 1.E+05 1.E+06
Figure Ripple Rejection Frequency
NOISE PERFORMANCE REDUCTION
Figure Output Impedance Test Circuit
AD1585 AD1582
noise generated AD1582 typically less then over frequency band. Figure shows noise typical AD1582. noise measurement made with high gain band-pass filter. Noise region approximately rms. Figure shows broadband noise typical AD1582. further noise reduction desired, 1-pole low-pass filter added between output ground. time constant point roughly reduces high frequency noise about rms. should noted, however, that while additional filtering output improve noise performance AD1582/AD1583/AD1584/AD1585 family, added output impedance could degrade performance references.
1E+01
1E+02
1E+03 1E+04 FREQUENCY
1E+05
1E+06
Figure Output Impedance Frequency
200mV 0.22 100mV VOUT 0.22
Figure Ripple Rejection Test Circuit
Figure to10 Voltage Noise
10ms
Figure Wideband Noise
REV.
-11-
AD1582/AD1583/AD1584/AD1585
TURN-ON TIME DYNAMIC PERFORMANCE
Many power instrument manufacturers becoming increasingly concerned with turn-on characteristics components being used their systems. Fast turn-on components often enable user save power keeping power when needed. Turn-on settling time defined time required, after application power (cold start), output voltage reach final value within specified error. major factors affecting this active circuit settling time time required thermal gradients chip stabilize. Figure shows turn-on settling transient response test circuit. Figure shows turn-on characteristic AD1582. This characteristic generated from cold-start operation represents true turn-on waveform after power-up. Figure shows fine settling characteristics AD1582. Typically, reference settles within 0.1% final value about device momentarily draw excessive supply current when VSUPPLY slightly below minimum specified level. Power supply resistance must enough ensure reliable turn-on. Fast power supply edges minimize this effect.
0.22 VOUT 0.22
Many converters present transient current loads reference, poor reference response degrade converter's performance. AD1582/AD1583/AD1584/AD1585 family references provides superior static dynamic line load regulation. Since these series references capable both sourcing sinking large current loads, they exhibit excellent settling characteristics. Figure displays line transient response AD1582. circuit used perform such measurement shown Figure 12a, where input supply voltage toggled from input output capacitors each 0.22 Figures show load transient settling characteristics AD1582 when load current steps applied. input supply voltage remains constant input decoupling output load capacitors respectively, output current toggled. both positive negative current loads, reference responses settle very quickly exhibit initial voltage spikes less than
Figure 12a. Turn-On/Transient Response Test Circuit
200mV
Figure Line Transient Response
Figure 12b. Turn-On Characteristics
Figure Load Transient Response Load)
Figure 12c. Turn-On Settling
Figure Load Transient Response Load)
-12-
REV.
AD1582/AD1583/AD1584/AD1585
OUTLINE DIMENSIONS 3-Lead Plastic Surface-Mount Package [SOT-23] (RT-3)
Dimensions shown millimeters
3.04 2.90 2.80 1.40 1.30 1.20
2.64 2.10
0.95 1.90 1.12 0.89 0.10 0.01 SEATING PLANE 0.50 0.30 0.60 0.50 0.40 0.20 0.08 0.54
COMPLIANT JEDEC STANDARDS TO-236AB
SOT-23 Tape Reel
Dimensions shown millimeters
1.55 1.50 1.50
4.10 4.00 3.90 2.05 2.00 1.95 1.85 1.75 1.65
1.10 1.00 0.90 0.35 0.30 0.25 2.80 2.70 2.60 20.20
REEL 100.00 REEL 330.00
14.40
1.50
8.30 8.00 7.70
13.20 13.00 12.80
REEL 50.00 REEL 100.00
3.55 3.50 3.45 3.20 3.10 2.90 1.00 0.75 9.90 8.40 8.40
DIRECTION UNREELING
Revision History
Location 12/02-Data Sheet changed from REV. REV. Page
Changes FEATURES Changes GENERAL DESCRIPTION Changes SPECIFICATIONS Changes ABSOLUTE MAXIMUM RATINGS replaced Changes TEMPERATURE PERFORMANCE section Figure replaced Changes OUTPUT VOLTAGE HYSTERESIS section SOT-23 package updated
REV.
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-14-
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-16-
C00701-0-1/03(C)
PRINTED U.S.A.
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