ADR280 Analog Devices, Inc., ADR280 Datasheet
ADR280
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ADR280 Summary of contents
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... Portable battery-operated electronics Low voltage converter references Wireless devices GENERAL DESCRIPTION The ADR280 is a 1.2 V band gap core reference with excellent line regulation and power supply rejection designed specifically for applications experiencing heavy dynamic supply variations, such as data converter references in GSM, GPRS, and 3G mobile station applications ...
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... ADR280 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 REVISION HISTORY 4/07—Rev Rev. C Updated Format..................................................................Universal Changes to Figure 1, Figure 2.......................................................... 1 Deleted Pin Function Descriptions Section and Pin Configurations Section .................................................................... 2 Changes to Figure 20 and Figure 21............................................... 9 Updated Outline Dimensions ....................................................... 10 10/04— ...
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... IN V– grounded μA LOAD kHz f = 400 kHz μA LOAD ) waveform with a nominal 3.6 V baseline that drops value for 380 μ Rev Page ADR280 1 Min Typ Max Unit < +85°C 1.195 1.200 1.205 ppm/° ...
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... ADR280 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter Supply Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range (Soldering, 60 Sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...
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... Figure 5. Supply Current vs. Temperature –5 –10 – 100 100 Rev Page –40 – TEMPERATURE (°C) Figure 6. Line Regulation vs. Temperature CH1 50.0µV M 1.00s Figure 7. Noise Voltage Peak-to-Peak kHz ADR280 80 100 ...
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... ADR280 –40 –60 –80 –100 0 2.5 5.0 FREQUENCY (kHz) Figure 8. Output Noise Density Plot ( –40dB 10dB/DIV 0Hz Figure 9. Voltage Noise Density 100 kHz 1.2 1.0 0.8 0.6 0.4 0.2 0 7.5 10 μ μF) OUT IN 100kHz Rev Page TIME (ms) Figure 10. Settling Time ...
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... THEORY OF OPERATION The ADR280 provides the basic core 1.2 V band gap reference. It contains two NPN transistors, Q9 and Q17, with their emitter areas scaled in a fixed ratio. The difference in the V a proportional to absolute temperature (PTAT) voltage that cancels the complementary to absolute temperature (CTAT voltage ...
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... OUT 0.1µF Figure 13. Floating References The ADR280 provides the core 1.2 V band gap voltage and is able to drive a maximum load of only 100 μA. Users can simply buffer the output for high current or sink/source current applica- tions, such as ADC or LCD driver references (see Figure 14). ...
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... GSM and 3G Mobile Station Applications The ADR280 voltage reference is ideal for use with analog baseband ICs in GSM and 3G mobile station applications. Figure 21 illustrates the use of the ADR280 with the AD6535 GSM analog baseband. The AD6535 provides all of the data converters and power management functions needed to ...
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... ADR280 OUTLINE DIMENSIONS 4.10 4.00 1.55 3.90 1.10 2.05 1.50 1.00 2.00 1.45 0.90 1.95 8.30 8.00 7.70 3.20 1.00 MIN 3.10 2.90 DIRECTION OF UNREELING 1.35 1.25 1.15 1.00 0.80 0.10 MAX 3.04 2.90 2.80 1.40 1.30 1.20 3 2.64 2. PIN 1 0.95 BSC 1.90 BSC 1.12 0.89 0.10 0.01 0.60 0.50 0.50 0.40 0.30 SEATING PLANE COMPLIANT TO JEDEC STANDARDS TO-236-AB Figure 22. 3-Lead Small Outline Transistor Package [SOT-23-3] (RT-3) Dimensions shown in millimeters 1.10 13” REEL 330.00 1.00 0.90 0.35 0.30 0.25 2.80 20.20 MIN 2.70 2.60 3.55 3.50 3.45 0.75 MIN Figure 23. Tape and Reel Dimensions (RT-3) Dimensions shown in millimeters 2.20 2.00 1.80 2.40 3 2.10 1. PIN 1 0 ...
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... ADR280AKSZ-R2 −40°C to +85°C 1 ADR280AKSZ-REEL7 −40°C to +85°C ADR280ART-R2 −40°C to +85°C ADR280ART-REEL −40°C to +85°C ADR280ART-REEL7 −40°C to +85°C 1 ADR280ARTZ-R2 −40°C to +85°C 1 ADR280ARTZ-REEL7 −40°C to +85° RoHS Compliant Part. Package ...
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... ADR280 NOTES ©2002–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03065-0-4/07(C) Rev Page ...