Cost, Precision References AD1403/AD1403A* PRODUCT DESCRIPTION

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Cost, Precision References AD1403/AD1403A* PRODUCT DESCRIPTION

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FEATURES Improved, Lower Cost, Replacements Standard 1403, 1403A 3-Terminal Device: Voltage In/Voltage Laser Trimmed High Accuracy: 2.500 (AD1403A) Excellent Temperature Stability: ppm/ (AD1403A) Quiescent Current: Current Output Capability Cost Convenient Mini-DIP Package
Cost, Precision References AD1403/AD1403A*
PRODUCT DESCRIPTION
PRODUCT HIGHLIGHTS
AD1403 AD1403A improved three-terminal, cost, temperature compensated, bandgap voltage references that provide fixed output voltage inputs between unique combination advanced circuit design laser-wafer-trimmed thin-film resistors provides AD1403/ AD1403A with initial tolerance temperature stability better than ppm/°C. addition, quiescent current drain (max) offers clear advantage over classical Zener techniques. AD1403 AD1403A recommended stable reference 12-bit D-to-A converters that require external reference. addition, wide input range AD1403/AD1403A allows operation with volt logic supplies, making these devices ideal digital panel meter applications when only single logic supply available. AD1403 AD1403A specified operation over +70°C temperature range. AD580 series volt precision references recommended applications where operation over -55°C +125°C range required.
AD1403A offers improved initial tolerance over industry-standard 1403A: versus lower cost. three-terminal voltage in/voltage operation AD1403/AD1403A provides regulated output voltage without external components. AD1403/AD1403A provides stable output voltage input voltages between making these devices ideal systems that contain single logic supply. Thin film resistor technology tightly controlled bipolar processing provide AD1403A with temperature stabilities ppm/°C. maximum quiescent current drain AD1403 AD1403A makes them ideal CMOS other power applications.
*Protected U.S. Patent Numbers: 3,887,863, RE30,586.
REV.
Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties which 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: 617/329-4700 Fax: 617/326-8703
AD1403/AD1403A-SPECIFICATIONS
Characteristic Output Voltage AD1403 AD1403A Temperature Coefficient Output Voltage AD1403 AD1403A Output Voltage Change, +70°C AD1403 AD1403A Line Regulation (4.5 Load Regulation Quiescent Current
Specifications subject change without notice.
unless otherwise noted.)
Unit
Symbol
2.475 2.490 VO/T
2.500 2.500
2.525 2.510
ppm/°C
Regin Regload
MAXIMUM RATINGS +25°C unless otherwise noted)
ORDERING GUIDE
Rating Input Voltage Storage Temperature Junction Temperature Operating Ambient Temperature Range
Symbol TSTG
Value +175
Unit Model AD1403 AD1403A
Plastic DIP.
Initial Tolerance
Package Option*
Figure AD1403/AD1403A Connection Diagram
Figure Simplified AD1403 Schematic
REV.
Typical Performance Curves- AD1403/AD1403A
Figure Typical Change VOUT (Normalized VOUT 25°C)
Figure Change VOUT Temperature (Normalized VOUT
Figure Change Output Voltage Load Current (Normalized VOUT lOUT
Figure Change VOUT Temperature (Normalized VOUT IOUT
VOLTAGE VARIATION TEMPERATURE LINE
Some confusion exists area defining specifying reference voltage error over temperature. Historically, references characterized using maximum deviation degree Centigrade; i.e., ppm/°C. However, because inconsistent nonlinearities Zener references (butterfly type characteristics), most manufacturers maximum limit error band approach characterize their references. This technique measures output voltage different temperatures guarantees that output voltage deviation will fall within guaranteed error band these discrete temperatures. This approach, course, makes mention guarantee performance other temperature within operating temperature range device. consistent Voltage Temperature performance typical AD1403 shown Figure Note that characteristic quasi-parabolic, possible type characteristics classical Zener references. This parabolic characteristic permits maximum output deviation specification over device's full operating temperature range, rather than just discrete temperatures.
Figure Quiescent Current Temperature (VIN IOUT
REV.
Applying AD1403/AD1403A AD1403/AD1403A
AD1403 exhibits worst-case shift over entire range operating input voltage, volts volts. Typically, shift less than shown Figure
AD1403A POWER, VOLTAGE PRECISION REFERENCE DATA CONVERTERS
AD1403A number features that make ideally suited with data converters used complex microprocessor-based systems. calibrated 2.500 volt output minimizes user trim requirements allows operation from single voltage supply. power consumption (1.5 quiescent current) commensurate with that CMOStype devices, while cost small package complements decreasing cost size latest converters. Figure shows AD1403A used reference AD7524 low-cost 8-bit CMOS with complete micro-
Figure AD1403 Precision Programmable Current Source
Figure Power, Voltage Reference AD7524 Microprocessor-Compatible 8-Bit
processor interface. AD1403A AD7524 specified operate from single volt supply; this eliminates need provide volt power supply sole purpose operating reference. AD7524 includes 8-bit data register, address decoding logic; thus interfaced directly 16-bit data bus. Only quiescent current from single volt supply required operate AD7524 which packaged small 16-pin DIP. AD542 output amplifier also power, requiring only quiescent current. laser-trimmed offset voltage preserves linearity AD7524KN without user trims typically settles less than microseconds. will provide volt -2.5 volt output swing from volt supplies.
AD1403 PRECISION PROGRAMMABLE CURRENT SOURCE
Figure Typical Temperature Coefficient Current Source OUTLINE DIMENSIONS
Dimensions shown inches (mm).
8-Pin Mini-DIP
AD1403 excellent building block precision current sources. wide range operating voltages, along with excellent line regulation over that range (7.5 result high insensitivity varying load impedances. quiescent current (II) (max) maximum specified maximum load current allows user program current value between REV.
PRINTED U.S.A.
C551a-9-7/82
Figure shows AD1403 connected current source. Total current equal quiescent current plus load current. Most temperature coefficient comes from quiescent current term which typical 0.13%/°C (1300 ppm/°C). load voltage (and hence current) much lower ppm/°C (AD1403). Therefore, overall temperature coefficient decreases rapidly load current increased. Figure shows typical temperature coefficient currents between AD1403A will improve appreciably.

Cost, Precision References AD1403/AD1403A* PRODUCT DESCRIPTION

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