ANALOG DEVICES ADR520, ADR525, ADR530, ADR540, ADR550 Service Manual

High Precision Shunt Mode

V

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ADR520/ADR525/ADR530/ADR540/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: 14 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)

ADR520A 2.048 ±0.4 70
ADR520B 2.048 ±0.2 40
ADR525A 2.5 ±0.4 70
ADR525B 2.5 ±0.2 40
ADR530A 3.0 ±0.4 70
ADR530B 3.0 ±0.2 40
ADR540A 4.096 ±0.4 70
ADR540B 4.096 ±0.2 40
ADR550A 5.0 ±0.4 70
ADR550B 5.0 ±0.2 40

Accuracy (%)

Coefficient
(ppm/°C)

Voltage References

PIN CONFIGURATION

ADR520/

1

+

ADR525/
ADR530/

2

ADR540/

ADR550

V–

Figure 1. 3-Lead SC70 (KS) and 3-Lead SOT-23-3 (RT)

GENERAL DESCRIPTION

Designed for space-critical applications, the ADR520/ADR525/
ADR530/ADR540/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 14 μV p-p.

Available in output voltages of 2.048 V, 2.5 V, 3.0 V, 4.096 V,
and 5.0 V, the advanced design of the ADR520/ADR525/
ADR530/ADR540/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 ADR520/ADR525/ADR530/
ADR540/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 any system errors.

TRIM

3

04501-001

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. Specifications subject to change without notice. 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.

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Tel: [phone] www.analog.com
Fax: [phone] ©2003–2008 Analog Devices, Inc. All rights reserved.

ADR520/ADR525/ADR530/ADR540/ADR550

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TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

Pin Configuration ............................................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

ADR520 Electrical Characteristics ............................................. 3

ADR525 Electrical Characteristics ............................................. 3

ADR530 Electrical Characteristics ............................................. 4

ADR540 Electrical Characteristics ............................................. 4

ADR550 Electrical Characteristics ............................................. 5

REVISION HISTORY

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

Absolute Maximum Ratings ............................................................6

Thermal Resistance .......................................................................6

ESD Caution...................................................................................6

Parameter Definitions .......................................................................7

Temperature Coefficient...............................................................7

Thermal Hysteresis .......................................................................7

Typical Performance Characteristics ..............................................8

Theory of Operation ...................................................................... 11

Applications ................................................................................ 11

Outline Dimensions ....................................................................... 13

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. E | Page 2 of 16

ADR520/ADR525/ADR530/ADR540/ADR550

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SPECIFICATIONS

ADR520 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

OUT

Grade A 2.040 2.048 2.056 V
Grade B 2.044 2.048 2.052 V

Initial Accuracy V

OERR

Grade A ±0.4% −8 +8 mV
Grade B ±0.2% −4 +4 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

−40°C < TA < +85°C 2 mV
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 15 mA 0.27 Ω
Minimum Operating Current IIN −40°C < TA < +85°C 50 μA
Voltage Noise e

0.1 Hz to 10 Hz 14 μV p-p

N p-p

Turn-On Settling Time tR 2 μs
Output Voltage Hysteresis ∆V

1

Guaranteed by design; not production tested.

I

OUT_HYS

= 1 mA to 15 mA

IN

= 1 mA 40 ppm

IN

ADR525 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 2.490 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 Coefficient

1

TCV

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

−40°C < TA < +85°C 2 mV
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; not production tested.

OUT

OERR

−40°C < TA < +85°C

O

= 1 mA to 15 mA

IN

0.1 Hz to 10 Hz 18 μV p-p

N p-p

IIN = 1 mA 40 ppm

OUT_HYS

Rev. E | Page 3 of 16

ADR520/ADR525/ADR530/ADR540/ADR550

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ADR530 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 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 Coefficient

1

TCV

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

−40°C < TA < +85°C 2 mV
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; not production tested.

OUT

OERR

−40°C < TA < +85°C

O

= 1 mA to 15 mA

IN

0.1 Hz to 10 Hz 22 μV p-p

N p-p

IIN = 1 mA 40 ppm

OUT_HYS

ADR540 ELECTRICAL CHARACTERISTICS

IIN = 50 μA to 15 mA, TA = 25°C, unless otherwise noted.

Table 5.

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage V

Grade A 4.080 4.096 4.112 V
Grade B 4.088 4.096 4.104 V

Initial Accuracy V

Grade A ±0.4% −16 +16 mV
Grade B ±0.2% −8 +8 mV

Temperature Coefficient

1

TCV

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

−40°C < TA < +85°C 2 mV
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 15 mA 0.2 Ω
Minimum Operating Current I
Voltage Noise e
Turn-On Settling Time tR 2 μs
Output Voltage Hysteresis ∆V

1

Guaranteed by design; not production tested.

OUT

OERR

−40°C < TA < +85°C

O

= 1 mA to 15 mA

IN

−40°C < TA < +85°C 50 μA

IN

0.1 Hz to 10 Hz 30 μV p-p

N p-p

I

OUT_HYS

= 1 mA 40 ppm

IN

Rev. E | Page 4 of 16

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ADR550 ELECTRICAL CHARACTERISTICS

IIN = 50 μA to 15 mA, TA = 25°C, unless otherwise noted.

Table 6.

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

−40°C < TA < +85°C 2 mV
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; not production tested.

OUT

OERR

= 1 mA to 15 mA

IN

0.1 Hz to 10 Hz 38 μV p-p

N p-p

IIN = 1 mA 40 ppm

OUT_HYS

Rev. E | Page 5 of 16