ANALOG DEVICES ADR525, ADR530, ADR550 Service Manual
High Precision Shunt Mode
V
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
APPLICATIONS
Portable, battery-powered equipment
Automotive
Power supplies
Data acquisition systems
Instrumentation and process control
Energy measurement
Table 1. Selection Guide
Temperature
Initial
Part Voltage (V)
ADR525A 2.5 ±0.4 70
ADR525B 2.5 ±0.2 40
ADR530A 3.0 ±0.4 70
ADR530B 3.0 ±0.2 40
ADR550A 5.0 ±0.4 70
ADR550B 5.0 ±0.2 40
Accuracy (%)
Coefficient
(ppm/°C)
Voltage References
ADR525/ADR530/ADR550
PIN CONFIGURATION
ADR525/
1
+
ADR530/
ADR550
2
V–
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.
TRIM
3
04501-001
Rev. F
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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
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
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
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
IIN = 50 μA to 15 mA, TA = 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage V
Grade A 2.490 2.500 2.510 V
Grade B 2.495 2.500 2.505 V
Initial Accuracy V
Grade A ±0.4% −10 +10 mV
Grade B ±0.2% −5 +5 mV
Temperature Coefficient1 TCVO −40°C < TA < +85°C
Grade A 25 70 ppm/°C
Grade B 15 40 ppm/°C
Output Voltage Change vs. IIN ∆VR IIN = 0.1 mA to 15 mA 1 mV
−40°C < TA < +85°C 4 mV
I
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 15 mA 0.2 Ω
Minimum Operating Current IIN −40°C < TA < +85°C 50 μA
Voltage Noise e
Turn-On Settling Time tR 2 μs
Output Voltage Hysteresis ∆V
1
Guaranteed by design, but not production tested.
OUT
OERR
= 1 mA to 15 mA, −40°C < TA < +85°C 2 mV
IN
0.1 Hz to 10 Hz 18 μV p-p
N p-p
IIN = 1 mA 40 ppm
OUT_HYS
ADR530 ELECTRICAL CHARACTERISTICS
IIN = 50 μA to 15 mA, TA = 25°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage V
Grade A 2.988 3.000 3.012 V
Grade B 2.994 3.000 3.006 V
Initial Accuracy V
Grade A ±0.4% −12 +12 mV
Grade B ±0.2% −6 +6 mV
Temperature Coefficient1 TCVO −40°C < TA < +85°C
Grade A 25 70 ppm/°C
Grade B 15 40 ppm/°C
Output Voltage Change vs. IIN ∆VR IIN = 0.1 mA to 15 mA 1 mV
−40°C < TA < +85°C 4 mV
I
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 15 mA 0.2 Ω
Minimum Operating Current IIN −40°C < TA < +85°C 50 μA
Voltage Noise e
Turn-On Settling Time tR 2 μs
Output Voltage Hysteresis ∆V
1
Guaranteed by design, but not production tested.
OUT
OERR
= 1 mA to 15 mA, −40°C < TA < +85°C 2 mV
IN
0.1 Hz to 10 Hz 22 μV p-p
N p-p
IIN = 1 mA 40 ppm
OUT_HYS
Rev. F | Page 3 of 12
ADR525/ADR530/ADR550
ADR550 ELECTRICAL CHARACTERISTICS
IIN = 50 μA to 15 mA, TA = 25°C, unless otherwise noted.
Table 4.
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage V
Grade A 4.980 5.000 5.020 V
Grade B 4.990 5.000 5.010 V
Initial Accuracy V
Grade A ±0.4% −20 +20 mV
Grade B ±0.2% −10 +10 mV
Temperature Coefficient1 TCVO −40°C < TA < +85°C
Grade A 25 70 ppm/°C
Grade B 15 40 ppm/°C
Output Voltage Change vs. IIN ∆VR IIN = 0.1 mA to 15 mA 1 mV
−40°C < TA < +85°C 5 mV
I
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 15 mA 0.2 Ω
Minimum Operating Current IIN −40°C < TA < +85°C 50 μA
Voltage Noise e
Turn-On Settling Time tR 2 μs
Output Voltage Hysteresis ∆V
1
Guaranteed by design, but not production tested.
OUT
OERR
= 1 mA to 15 mA, −40°C < TA < +85°C 2 mV
IN
0.1 Hz to 10 Hz 38 μV p-p
N p-p
IIN = 1 mA 40 ppm
OUT_HYS
Rev. F | Page 4 of 12
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