ADR280ART-R2 Analog Devices Inc, ADR280ART-R2 Datasheet

IC REF VOLT HI PSRR 1.2V SOT-23

ADR280ART-R2

Manufacturer Part Number
ADR280ART-R2
Description
IC REF VOLT HI PSRR 1.2V SOT-23
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADR280ART-R2

Rohs Status
RoHS non-compliant
Design Resources
4 mA-to-20 mA Loop-Powered Temperature Monitor Using ADuC7060/1 (CN0145)
Reference Type
Series
Voltage - Output
1.2V
Tolerance
±0.4%
Temperature Coefficient
40ppm/°C
Voltage - Input
2.4 ~ 5.5 V
Number Of Channels
1
Current - Quiescent
16µA
Current - Output
100µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
Current - Cathode
-
Other names
ADR280ART-R2TR
FEATURES
1.2 V precision output
Excellent line regulation: 2 ppm/V typical
High power supply ripple rejection: –80 dB at 220 Hz
Ultralow power supply current: 16 μA maximum
Temperature coefficient: 40 ppm/°C maximum
Low noise, 12.5 nV/√Hz typical
Operating supply range, 2.4 V to 5.5 V
Compact 3-lead SOT-23 and SC70 packages
APPLICATIONS
List GSM, GPRS, 3G mobile stations
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. Devices such as the AD6535 that
have an analog baseband IC with on-board baseband, audio
codecs, voltage regulators, and battery chargers rely on the
ability of the ADR280 to reject input battery voltage variations
during RF power amplifier activity.
In addition to mobile stations, the ADR280 is suitable for a
variety of general-purpose applications. Most band gap refer-
ences include internal gain for specific outputs, which simplifies
the user’s design, but compromises on the cost, form factor, and
flexibility. The ADR280, on the other hand, optimizes the band
gap core voltage and allows users to tailor the voltage, current,
or transient response by simply adding their preferred op amps.
The ADR280 operates on a wide supply voltage range from
2.4 V to 5.5 V. It is available in compact 3-lead SOT-23 and
SC70 packages. The device is specified over the extended indus-
trial temperature range of −40°C to +85°C.
Rev. C
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
High PSRR Voltage Reference
–10
–15
15
10
–5
5
0
–40
–20
Figure 3. Line Regulation vs. Temperature
PIN CONFIGURATIONS
©2002–2007 Analog Devices, Inc. All rights reserved.
V
V
OUT
OUT
1.2 V Ultralow Power
V+
V+
Figure 1. 3-Lead SOT-23
0
Figure 2. 3-Lead SC70
1
2
1
2
TEMPERATURE (°C)
3V TO 5V
ADR280
ADR280
(RT Suffix)
(KS Suffix)
20
40
3
3
V–
V–
60
ADR280
www.analog.com
80
100

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ADR280ART-R2 Summary of contents

Page 1

FEATURES 1.2 V precision output Excellent line regulation: 2 ppm/V typical High power supply ripple rejection: – 220 Hz Ultralow power supply current: 16 μA maximum Temperature coefficient: 40 ppm/°C maximum Low noise, 12.5 nV/√Hz typical Operating supply ...

Page 2

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 ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS 25°C, unless otherwise noted Table 1. Parameter Symbol Output Voltage V OUT Temperature Coefficient TCV O Line Regulation ΔV OUT Supply Current I IN Ground Current ...

Page 4

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 ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS 1.20225 1.20200 NO LOAD 1.20175 1.20150 1.20125 1.20100 1.20075 1.20050 1.20025 1.20000 –40 – TEMPERATURE (°C) Figure 4. V vs. Temperature OUT ...

Page 6

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 ...

Page 7

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 ...

Page 8

ADR280 APPLICATIONS INFORMATION The ADR280 should be decoupled with a 0.1 μF ceramic capacitor at the output for optimum stability also good practice to include 0.1 μF ceramic capacitors at the IC supply pin. These capacitors should be ...

Page 9

Boosted Current Source Adding one more buffer to the previous circuit boosts the current to the level that is limited only by the buffer U2 current handling capability (see Figure 18 ADR280 OUT ...

Page 10

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 ...

Page 11

... ADR280AKS-REEL −40°C to +85°C ADR280AKS-REEL7 −40°C to +85°C 1 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 − ...

Page 12

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 ...

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