Analog Devices ADR520 5 30 40 50 a Datasheet

High Precision Shunt Mode

V

FEATURES

Ultracompact SC70 and SOT-23 packages
Temperature coefficient: 40 ppm/°C (max)
2× the tempco improvement over the LM4040
Pin compatible with 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 10 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

Voltage

Part

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

(V)

Initial
Accuracy (%)

Coeffecient
(ppm/°C)

Voltage References

ADR520/ADR525/ADR530/ADR540/ADR550

PIN CONFIGURATION

ADR520/

1

+

ADR525/
ADR530/

ADR540/

2

V–

ADR550

Figure 1. 3-Lead SC70 (KS)

and 3-Lead SOT-23 (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 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 ADR5xx’s advanced design 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 10 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 ADR5xx 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

04501-0-001

Rev. A

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

ADR520/ADR525/ADR530/ADR540/ADR550

TABLE OF CONTENTS

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

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

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

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

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

REVISION HISTORY

11/03—Revision 0: Initial Version

12/03—Data Sheet Changed from REV. 0 to REV. A

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

Change to Ordering Guide............................................................ 14

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

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

Ordering Guide............................................................................... 14

Rev. A | Page 2 of 16

ADR520/ADR525/ADR530/ADR540/ADR550

SPECIFICATIONS

Table 2. ADR520 Electrical Characteristics @ IIN = 50 µA to 10 mA, TA = 25°C, unless otherwise noted

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage
Grade A
Grade B
Initial Accuracy V

V

O

OERR

2.040

2.044

2.048

2.048

2.056

2.052

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 10 mA

–40°C < T
I

= 1 mA to 10 mA

IN

–40°C < T

< +85°C

A

< +85°C

A

1
4

2
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to10 mA 0.27 Ω
Minimum Operating Current I
Voltage Noise e

–40°C < TA < +85°C 50 µA

IN

0.1 Hz to 10 Hz 14 µV p-p

N p-p

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

IIN = 1 mA 40 ppm

O_HYS

1

Guaranteed by design

Table 3. ADR525 Electrical Characteristics @ I

= 50 µA to 10 mA, TA = 25°C, unless otherwise noted

IN

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage
Grade A
Grade B
Initial Accuracy V

V

O

OERR

2.490

2.495

2.500

2.500

2.510

2.505

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

∆V

R

I

= 0.1 mA to 10 mA

IN

–40°C < T
I

= 1 mA to 10 mA

IN

–40°C < T

< +85°C

A

< +85°C

A

1

4

2
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 10 mA 0.2 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

IIN = 1 mA 40 ppm

O_HYS

1

Guaranteed by design

V
V

mV
mV

mV

V
V

mV
mV

mV

Rev. A | Page 3 of 16

ADR520/ADR525/ADR530/ADR540/ADR550

Table 4. ADR530 Electrical Characteristics @ IIN = 50 µA to 10 mA, TA = 25°C, unless otherwise noted

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage
Grade A
Grade B
Initial Accuracy V

V

O

2.988

2.994

OERR

3.000

3.000

3.012

3.006

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 10 mA

–40°C < T
I

= 1 mA to 10 mA

IN

–40°C < T

< +85°C

A

< +85°C

A

1
4

2
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 10 mA 0.2 Ω
Minimum Operating Current IIN –40°C < TA < +85°C 50 µA
Voltage Noise e

0.1 Hz to 10 Hz 16 µV p-p

N p-p

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

IIN = 1 mA 40 ppm

O_HYS

1

Guaranteed by design

Table 5. ADR540 Electrical Characteristics @ I

= 50 µA to 10 mA, TA = 25°C, unless otherwise noted

IN

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage
Grade A
Grade B
Initial Accuracy V

V

O

4.08

4.088

OERR

4.096

4.096

4.112

4.104

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

∆V

R

I

= 0.1 mA to 10 mA

IN

–40°C < T
I

= 1 mA to 10 mA

IN

–40°C < T

< +85°C

A

< +85°C

A

1

5

2
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 10 mA 0.2 Ω
Minimum Operating Current I
Voltage Noise e

–40°C < TA < +85°C 50 µA

IN

0.1 Hz to 10 Hz 18 µV p-p

N p-p

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

I

O_HYS

= 1 mA 40 ppm

IN

1

Guaranteed by design

V
V

mV
mV

mV

V
V

mV
mV

mV

Rev. A | Page 4 of 16

ADR520/ADR525/ADR530/ADR540/ADR550

Table 6. ADR550 Electrical Characteristics @ IIN = 50 µA to 10 mA, TA = 25°C, unless otherwise noted

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage
Grade A
Grade B
Initial Accuracy V

V

O

OERR

4.980

4.090

5.000

5.000

5.020

5.010

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

∆V

R

I

= 0.1 mA to 10 mA

IN

–40°C < T
I

= 1 mA to 10 mA

IN

–40°C < T

< +85°C

A

< +85°C

A

1
5

2
Dynamic Output Impedance (∆VR/∆IR) IIN = 0.1 mA to 10 mA 0.2 Ω
Minimum Operating Current IIN –40°C < TA < +85°C 50 µA
Voltage Noise e

0.1 Hz to 10 Hz 18 µV p-p

N p-p

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

IIN = 1 mA 40 ppm

O_HYS

1

Guaranteed by design

V
V

mV
mV

mV

Rev. A | Page 5 of 16