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2.5 V to 5.0 V Micropower, Precision
a
Series Mode Voltage References
AD1582/AD1583/AD1584/AD1585
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Series Reference (2.5 V, 3 V, 4.096 V, 5 V)
3-Lead SOT-23
Low Quiescent Current: 70 A max
(RT Suffix)
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
V
OUT
Specified Temperature Range: –40C to +125C
Compact, Surface-Mount SOT-23 Package
GND
AD158x Products, Three Electrical Grades
1
2
3
AD1582/
AD1583/
AD1584/
AD1585
TOP VIEW
V
IN
Electrical
Grade Initial Accuracy
Tempco
(ppmC)
B
C
A
AD1582
0.08%
0.16%
0.80%
AD1583/AD1585
0.10%
0.20%
1.00%
AD1584
0.10%
0.20%
0.98%
50
50
100
GENERAL DESCRIPTION
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.
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
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
2.7 5
*
3.076k SOURCE RESISTOR
V
SUPPLY
(V)
SHUNT REFERENCE
*
AD1582 SERIES REFERENCE
Figure 1. Supply Current (
m
A) vs. Supply Voltage (V)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/461-3113 © 2005 Analog Devices, Inc. All rights reserved.
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 mA of quiescent current with only a 1.0 mA/V
200
variation with supply voltage. The advantage of these designs
over conventional shunt devices is extraordinary. Valuable supply
100
current is no longer wasted through an input series resistor, and
0
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 –40∞C to +125∞C.
REV. E
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.
I
SUPPLY
(
A)
500
400
300
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