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ADR280 반도체 회로 부품 판매점

1.2 V Ultralow Power High PSRR Voltage Reference



Analog Devices 로고
Analog Devices
ADR280 데이터시트, 핀배열, 회로
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 A Maximum
Temperature Coefficient, 40 ppm/oC 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
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, which
has an analog baseband IC with on-board baseband and audio
codecs, voltage regulators, and battery charger, rely on the
ADR280’s ability 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 2.4V
to 5.5 V. It is available in compact 3-lead SOT-23 and SC70
packages. The device is specified over the extended industrial
temperature range of –40°C to +85°C.
1.2 V Ultralow Power
High PSRR Voltage Reference
ADR280
PIN CONFIGURATIONS
3-Lead SOT-23
(RT Suffix)
V+ 1
ADR280 3 V–
VOUT 2
3-Lead SC70
(KS Suffix)
VOUT 1
ADR280 3 V–
V+ 2
15
10
5
3V TO 5V
0
–5
–10
–15
–40
–20
0
20 40
60
TEMPERATURE (C)
80 100
Figure 1. Line Regulation vs.Temperature
REV. A
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. No license is granted by implication or oth-
erwise under any patent or patent rights of Analog Devices.Trademarks
and registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.


ADR280 데이터시트, 핀배열, 회로
ADR280–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (VIN = 2.55 V to 5.5 V, TA = 25°C, unless otherwise noted.)
Parameter
Output Voltage2
Temperature Coefficient
Symbol
VOUT
TCVo
Line Regulation
Supply Current
Ground Current
Input Voltage Range
Operating Temperature Range
Nominal Load Capacitance
Output Noise Voltage
Output Noise Density
Power Supply Ripple Rejection3
Start-Up Time
VOUT/VIN
IIN
IGND
VIN
TA
COUT
VN
eN
PSRR
tON
Conditions
0°C < TA < 50°C
–40°C < TA < +85°C
2.55 V < VIN < 5.5 V, No Load
2.4 V < VIN < 5.5 V, No Load
V– Grounded, ILOAD = 10 µA
f = 10 Hz to 10 kHz
f = 400 kHz
ILOAD = 10 µA
Min
1.195
2.4
–40
1
Typ1
1.200
5
10
2
10
12
12.5
12.5
–80
2
Max
1.205
20
40
12
16
20
5.5
+85
Unit
V
ppm/oC
ppm/oC
ppm/V
µA
µA
V
°C
µF
µVrms
nV/÷Hz
dB
ms
NOTES
1Typical values represent average readings taken at room temperature.
2Conditions: 2.4 V < VIN < 5.5 V, 0 µA < IOUT < 10 µA, –40°C < TA < +85°C.
3Power supply ripple rejection measurement applies to a changing input voltage (VIN) waveform with a nominal 3.6 V baseline that drops to a 3 V value for
380 µs at a 4.6 ms repetition rate.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS1, 2
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Storage Temperature Range . . . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range . . . . . . . . . . . . . –40°C to +85°C
Junction Temperature Range . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering, 60 Sec) . . . . . . . . . .300°C
NOTES
1Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device. This is a stress rating only and functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
2 Absolute Maximum Ratings apply at 25°C, unless otherwise noted.
Package Type
SOT-23
SC70
THERMAL RESISTANCE
JA*
JC
230 146
376 102
Unit
°C/W
°C/W
* JA is specified for the worst-case conditions, i.e., JA is specified for device sol-
dered in circuit board for surface-mount packages.
ORDERING GUIDE
Model
ADR280ART-R2
ADR280ART-REEL7
ADR280ART-REEL
ADR280AKS-R2
ADR280AKS-REEL7
ADR280AKS-REEL
Temperature
Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
Description
SOT-23
SOT-23
SOT-23
SC70
SC70
SC70
Package
Option
RT-3
RT-3
RT-3
KS-3
KS-3
KS-3
Top
Mark
RBA
RBA
RBA
RBA
RBA
RBA
Output
Voltage (V)
1.200
1.200
1.200
1.200
1.200
1.200
Number of
Parts per Reel
250
3,000
10,000
250
3,000
10,000
Pin No.
1
2
3
PIN FUNCTION DESCRIPTIONS
Mnemonic
SOT-23 SC70
Description
V+
VOUT
V–
VOUT
V+
V–
High Supply Voltage Input
Output Voltage
Low Supply Voltage Input
PIN CONFIGURATIONS
SOT-23
SC70
V+ 1
ADR280
VOUT 1
3 V–
ADR280
VOUT 2
V+ 2
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate
on the human body and test equipment and can discharge without detection. Although the ADR280
features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high
energy electrostatic discharges.Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
–2–
3 V–
REV. A




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1.2 V Ultralow Power High PSRR Voltage Reference - Analog Devices