High Precision Shunt Mode
Voltage References
ADR525/ADR530/ADR550
FEATURES
Ultracompact SC70 and SOT-23-3 packages
Temperature coefficient: 40 ppm/°C (maximum)
2× the temperature coefficient improvement over the
LM4040
Pin compatible with the LM4040/LM4050
Initial accuracy: ±0.2%
Low output voltage noise: 18 μV p-p @ 2.5 V output
No external capacitor required
Operating current range: 50 μA to 15 mA
Industrial temperature range: −40°C to +85°C
PIN CONFIGURATION
V+
1
ADR525/
ADR530/
ADR550
3
TRIM
04501-001
V–
2
Figure 1. 3-Lead SC70 (KS) and 3-Lead SOT-23-3 (RT)
GENERAL DESCRIPTION
Designed for space-critical applications, the ADR525/ADR530/
ADR550 are high precision shunt voltage references, housed in
ultrasmall SC70 and SOT-23-3 packages. These references feature
low temperature drift of 40 ppm/°C, an initial accuracy of better
than ±0.2%, and ultralow output noise of 18 μV p-p.
Available in output voltages of 2.5 V, 3.0 V, and 5.0 V, the
advanced design of the ADR525/ADR530/ADR550 eliminates
the need for compensation by an external capacitor, yet the
references are stable with any capacitive load. The minimum
operating current increases from a mere 50 μA to a maximum
of 15 mA. This low operating current and ease of use make
these references ideally suited for handheld, battery-powered
applications.
A trim terminal is available on the ADR525/ADR530/ADR550
to allow adjustment of the output voltage over a ±0.5% range,
without affecting the temperature coefficient of the device. This
feature provides users with the flexibility to trim out small
system errors.
For better initial accuracy and wider temperature range, see the
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
family at
www.analog.com.
APPLICATIONS
Portable, battery-powered equipment
Automotive
Power supplies
Data acquisition systems
Instrumentation and process control
Energy measurement
Table 1. Selection Guide
Initial
Accuracy (%)
±0.4
±0.2
±0.4
±0.2
±0.4
±0.2
Temperature
Coefficient
(ppm/°C)
70
40
70
40
70
40
Part
ADR525A
ADR525B
ADR530A
ADR530B
ADR550A
ADR550B
Voltage (V)
2.5
2.5
3.0
3.0
5.0
5.0
Rev. F
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.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2003–2010 Analog Devices, Inc. All rights reserved.
ADR525/ADR530/ADR550
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Pin Configuration............................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
ADR525 Electrical Characteristics............................................. 3
ADR530 Electrical Characteristics............................................. 3
ADR550 Electrical Characteristics............................................. 4
Absolute Maximum Ratings............................................................ 5
Thermal Resistance .......................................................................5
ESD Caution...................................................................................5
Parameter Definitions.......................................................................6
Temperature Coefficient...............................................................6
Thermal Hysteresis .......................................................................6
Typical Performance Characteristics ..............................................7
Theory of Operation .........................................................................9
Applications ...................................................................................9
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 12
REVISION HISTORY
8/10—Rev. E to Rev. F
Deleted ADR520 and ADR540 .........................................Universal
Changes to Table 1, Figure 1, and General Description
Section................................................................................................ 1
Deleted ADR520 Electrical Characteristics Section .................... 3
Deleted Table 2; Renumbered Sequentially .................................. 3
Deleted ADR540 Electrical Characteristics Section and
Table 5 ................................................................................................ 4
Changes to Figure 2 and Figure 7................................................... 7
Deleted Figure 3; Renumbered Sequentially................................. 8
Changes to Figure 9 and Figure 10................................................. 8
Deleted Figure 8, Figure 9, and Figure 12 ..................................... 9
Changes to Figure 20...................................................................... 10
6/08—Rev. D to Rev. E
Changes to Table 3............................................................................ 3
Changes to Table 4 and Table 5....................................................... 4
Changes to Table 6............................................................................ 5
Changes to Figure 4.......................................................................... 8
Changes to Applications Section .................................................. 11
12/07—Rev. C to Rev. D
Changes to Figure 3 and Figure 5....................................................8
Changes to Figure 15, Figure 16, and Figure 17 Captions ........ 10
Changes to Figure 23...................................................................... 12
Updated Outline Dimensions....................................................... 13
8/07—Rev. B to Rev. C
Changes to Figure 21...................................................................... 11
Updated Outline Dimensions....................................................... 13
Changes to Ordering Guide .......................................................... 14
1/06—Rev. A to Rev. B
Updated Formatting...........................................................Universal
Changes to Features Section ............................................................1
Changes to General Description Section .......................................1
Updated Outline Dimensions....................................................... 13
Changes to Ordering Guide .......................................................... 14
12/03—Data Sheet Changed from Rev. 0 to Rev. A
Updated Outline Dimensions....................................................... 13
Change to Ordering Guide............................................................ 14
11/03—Revision 0: Initial Version
Rev. F | Page 2 of 12
ADR525/ADR530/ADR550
SPECIFICATIONS
ADR525 ELECTRICAL CHARACTERISTICS
I
IN
= 50 μA to 15 mA, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
Output Voltage
Grade A
Grade B
Initial Accuracy
Grade A
Grade B
Temperature Coefficient
1
Grade A
Grade B
Output Voltage Change vs. I
IN
Symbol
V
OUT
Conditions
Min
2.490
2.495
V
OERR
±0.4%
±0.2%
−40°C < T
A
< +85°C
−10
−5
25
15
∆V
R
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
I
IN
= 1 mA to 15 mA, −40°C < T
A
< +85°C
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
0.1 Hz to 10 Hz
I
IN
= 1 mA
+10
+5
70
40
1
4
2
0.2
mV
mV
ppm/°C
ppm/°C
mV
mV
mV
Ω
μA
μV p-p
μs
ppm
Typ
2.500
2.500
Max
2.510
2.505
Unit
V
V
TCV
O
Dynamic Output Impedance
Minimum Operating Current
Voltage Noise
Turn-On Settling Time
Output Voltage Hysteresis
1
(∆V
R
/∆I
R
)
I
IN
e
N p-p
t
R
∆V
OUT_HYS
50
18
2
40
Guaranteed by design, but not production tested.
ADR530 ELECTRICAL CHARACTERISTICS
I
IN
= 50 μA to 15 mA, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
Output Voltage
Grade A
Grade B
Initial Accuracy
Grade A
Grade B
Temperature Coefficient
1
Grade A
Grade B
Output Voltage Change vs. I
IN
Symbol
V
OUT
Conditions
Min
2.988
2.994
V
OERR
±0.4%
±0.2%
−40°C < T
A
< +85°C
−12
−6
25
15
∆V
R
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
I
IN
= 1 mA to 15 mA, −40°C < T
A
< +85°C
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
0.1 Hz to 10 Hz
I
IN
= 1 mA
+12
+6
70
40
1
4
2
0.2
mV
mV
ppm/°C
ppm/°C
mV
mV
mV
Ω
μA
μV p-p
μs
ppm
Typ
3.000
3.000
Max
3.012
3.006
Unit
V
V
TCV
O
Dynamic Output Impedance
Minimum Operating Current
Voltage Noise
Turn-On Settling Time
Output Voltage Hysteresis
1
(∆V
R
/∆I
R
)
I
IN
e
N p-p
t
R
∆V
OUT_HYS
50
22
2
40
Guaranteed by design, but not production tested.
Rev. F | Page 3 of 12
ADR525/ADR530/ADR550
ADR550 ELECTRICAL CHARACTERISTICS
I
IN
= 50 μA to 15 mA, T
A
= 25°C, unless otherwise noted.
Table 4.
Parameter
Output Voltage
Grade A
Grade B
Initial Accuracy
Grade A
Grade B
Temperature Coefficient
1
Grade A
Grade B
Output Voltage Change vs. I
IN
Symbol
V
OUT
Conditions
Min
4.980
4.990
V
OERR
±0.4%
±0.2%
−40°C < T
A
< +85°C
−20
−10
25
15
∆V
R
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
I
IN
= 1 mA to 15 mA, −40°C < T
A
< +85°C
I
IN
= 0.1 mA to 15 mA
−40°C < T
A
< +85°C
0.1 Hz to 10 Hz
I
IN
= 1 mA
+20
+10
70
40
1
5
2
0.2
mV
mV
ppm/°C
ppm/°C
mV
mV
mV
Ω
μA
μV p-p
μs
ppm
Typ
5.000
5.000
Max
5.020
5.010
Unit
V
V
TCV
O
Dynamic Output Impedance
Minimum Operating Current
Voltage Noise
Turn-On Settling Time
Output Voltage Hysteresis
1
(∆V
R
/∆I
R
)
I
IN
e
N p-p
t
R
∆V
OUT_HYS
50
38
2
40
Guaranteed by design, but not production tested.
Rev. F | Page 4 of 12
ADR525/ADR530/ADR550
ABSOLUTE MAXIMUM RATINGS
Ratings apply at 25°C, unless otherwise noted.
Table 5.
Parameter
Reverse Current
Forward Current
Storage Temperature Range
Industrial Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
25 mA
20 mA
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
THERMAL RESISTANCE
Table 6.
Package Type
3-Lead SC70 (KS)
3-Lead SOT-23-3 (RT)
1
θ
JA1
580.5
270
θ
JC
177.4
102
Unit
°C/W
°C/W
θ
JA
is specified for worst-case conditions, such as for devices soldered on
circuit boards for surface-mount packages.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. F | Page 5 of 12
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