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AD1585BRT Datasheet

  • AD1585BRT

  • 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...

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a
FEATURES
Series Reference (2.5 V, 3 V, 4.096 V, 5 V)
Low Quiescent Current: 70 A max
Current Output Capability: 5 mA
Wide Supply Range: V
IN
= V
OUT
+ 200 mV to 12 V
Wideband Noise (10 Hz to 10 kHz): 50 V rms
Specified Temperature Range: 鈥?0 C to +125 C
Compact, Surface-Mount SOT-23 Package
AD158x Products, Three Electrical Grades
2.5 V to 5.0 V Micropower, Precision
Series Mode Voltage References
AD1582/AD1583/AD1584/AD1585
FUNCTIONAL BLOCK DIAGRAM
3-Lead SOT-23
(RT Suffix)
V
OUT
1
AD1582/
AD1583/
AD1584/
AD1585
TOP VIEW
3 V
IN
GND 2
Electrical
Grade
B
C
A
AD1582
0.08%
0.16%
0.80%
Initial Accuracy
AD1583/AD1585
0.10%
0.20%
1.00%
AD1584
0.10%
0.20%
0.98%
Tempco
(ppm C)
50
50
100
TARGET APPLICATIONS
1. Portable, battery-powered equipment, e.g., notebook comput-
ers, cellular phones, pagers, PDAs, GPSs, and DMMs.
2. Computer workstations. Suitable for use with a wide range of
video RAMDACs.
3. Smart industrial transmitters
4. PCMCIA cards
5. Automotive
6. Hard disk drives
7. 3 V/5 V, 8-bit/12-bit data converters
900
800
700
600
I
SUPPLY
( A)
GENERAL DESCRIPTION
The AD1582, AD1583, AD1584, and AD1585 are a family of low
cost, low power, low dropout, precision band gap references.
These designs are available as three-terminal (series) devices
and are packaged in the compact SOT-23, 3-lead surface-mount
package. The versatility of these references makes them ideal for
use in battery-powered 3 V or 5 V systems where there may be
wide variations in supply voltage and a need to minimize power
dissipation.
The superior accuracy and temperature stability of the AD1582/
AD1583/AD1584/AD1585 is made possible by the precise
matching and thermal tracking of on-chip components. Patented
temperature drift curvature correction design techniques minimize
the nonlinearities in the voltage output temperature characteristic.
These series mode devices (AD1582/AD1583/AD1584/AD1585)
source or sink up to 5 mA of load current and operate efficiently
with only 200 mV of required headroom supply. This family
draws a maximum 70
碌A(chǔ)
of quiescent current with only a 1.0
碌A(chǔ)/V
variation with supply voltage. The advantage of these designs
over conventional shunt devices is extraordinary. Valuable supply
current is no longer wasted through an input series resistor, and
maximum power efficiency is achieved at all input voltage levels.
The AD1582, AD1583, AD1584, and AD1585 are available in
three grades, A, B, and C, and are provided in a tiny footprint,
the SOT-23. All grades are specified over the industrial tem-
perature range of 鈥?0擄C to +125擄C.
SHUNT REFERENCE
*
500
400
300
200
100
0
2.7
AD1582 SERIES REFERENCE
V
SUPPLY
(V)
5
SOURCE RESISTOR
*
3.076k
Figure 1. Supply Current (
碌
A) vs. Supply Voltage (V)
REV. D
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 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
www.analog.com
Fax: 781/326-8703
漏 2004 Analog Devices, Inc. All rights reserved.

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