ANALOG DEVICES ADR 441 BRZ Datasheet

Ultralow Noise, LDO XFET Voltage

References with Current Sink and Source

FEATURES

Ultralow noise (0.1 Hz to 10 Hz)

ADR440: 1 μV p-p
ADR441: 1.2 μV p-p
ADR443: 1.4 μV p-p
ADR444: 1.8 μV p-p
ADR445: 2.25 μV p-p

Superb temperature coefficient

A grade: 10 ppm/°C

B grade: 3 ppm/°C
Low dropout operation: 500 mV
Input range: (V
High output source and sink current

+10 mA and −5 mA, respectively
Wide temperature range: −40°C to +125°C

APPLICATIONS

Precision data acquisition systems
High resolution data converters
Battery-powered instrumentation
Portable medical instruments
Industrial process control systems
Precision instruments
Optical control circuits

+ 500 mV) to 18 V

OUT

ADR440/ADR441/ADR443/ADR444/ADR445

PIN CONFIGURATIONS

ADR440/

TP

1

ADR441/

2

ADR443/

V

IN

ADR444/

NC

3

ADR445

TOP VIEW

4

GND

(Not to Scale)

NOTES

1. NC = NO CONNECT

2. TP = TEST P IN (DO NOT CO NNECT)

Figure 1. 8-Lead SOIC_N (R-Suffix)

ADR440/

1

TP

ADR441/
ADR443/

V

2

IN

ADR444/

3

NC

ADR445

GND

NOTES

1. NC = NO CONNECT

2. TP = TEST P IN (DO NOT CONNECT)

Figure 2. 8-Lead MSOP (RM-Suffix)

TOP VIEW

4

(Not to S cal e)

TP

8

7

NC
V

6

OUT

5

TRIM

05428-001

8

TP
NC

7

6

V

OUT

TRIM

5

05428-002

GENERAL DESCRIPTION

The ADR44x series is a family of XFET® voltage references
featuring ultralow noise, high accuracy, and low temperature
drift performance. Using Analog Devices, Inc., patented
temperature drift curvature correction and XFET (eXtra
implanted junction FET) technology, voltage change vs.
temperature nonlinearity in the ADR44x is greatly minimized.

The XFET references offer better noise performance than
buried Zener references, and XFET references operate off
low supply voltage headroom (0.5 V). This combination of
features makes the ADR44x family ideally suited for precision
signal conversion applications in high-end data acquisition
systems, optical networks, and medical applications.

The ADR44x family has the capability to source up to 10 mA of
output current and sink up to −5 mA. It also comes with a trim
terminal to adjust the output voltage over a 0.5% range without
compromising performance.

Rev. E

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.

Offered in two electrical grades, the ADR44x family is avail­able in 8-lead MSOP and narrow SOIC packages. All versions
are specified over the extended industrial temperature range of

−40°C to +125°C.

Table 1. Selection Guide

Model

Output
Voltage
(V)

Initial
Accuracy
(mV)

Temperature
Coefficient
(ppm/°C)

ADR440A 2.048 ±3 10
ADR440B 2.048 ±1 3
ADR441A 2.500 ±3 10
ADR441B 2.500 ±1 3
ADR443A 3.000 ±4 10
ADR443B 3.000 ±1.2 3
ADR444A 4.096 ±5 10
ADR444B 4.096 ±1.6 3
ADR445A 5.000 ±6 10
ADR445B 5.000 ±2 3

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2005–2010 Analog Devices, Inc. All rights reserved.

ADR440/ADR441/ADR443/ADR444/ADR445

TABLE OF CONTENTS

Features.............................................................................................. 1

Applications....................................................................................... 1

Pin Configurations ........................................................................... 1

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

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

Specifications..................................................................................... 3

ADR440 Electrical Characteristics............................................. 3

ADR441 Electrical Characteristics............................................. 4

ADR443 Electrical Characteristics............................................. 5

ADR444 Electrical Characteristics............................................. 6

ADR445 Electrical Characteristics............................................. 7

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Typical Performance Characteristics ............................................. 9

Theory of Operation ...................................................................... 14

Power Dissipation Considerations........................................... 14

Basic Voltage Reference Connections ..................................... 14

Noise Performance..................................................................... 14

Turn-On Time ............................................................................ 14

Applications Information.............................................................. 15

Output Adjustment.................................................................... 15

Bipolar Outputs.......................................................................... 15

Programmable Voltage Source ................................................. 15

Programmable Current Source ................................................ 16

High Voltage Floating Current Source.................................... 16

Precision Output Regulator (Boosted Reference)................. 16

Outline Dimensions....................................................................... 17

Ordering Guide .......................................................................... 18

REVISION HISTORY

11/10—Rev. D to Rev. E

Deleted Negative Reference Section............................................. 15

Deleted Figure 37; Renumbered Sequentially ............................ 15

3/10—Rev. C to Rev. D

Changes to Figure 37...................................................................... 15

Updated Outline Dimensions....................................................... 18

3/08—Rev. B to Rev. C

Changes to Table 8............................................................................ 8

Change to Figure 11 ....................................................................... 10

Changes to Figure 36...................................................................... 15

Changes to Figure 39...................................................................... 16

Changes to Figure 41...................................................................... 17

Updated Outline Dimensions....................................................... 18

8/07—Rev. A to Rev. B

Change to Table 2, Ripple Rejection Ratio Specification ............ 3

Change to Table 3, Ripple Rejection Ratio Specification ............ 4

Change to Table 4, Ripple Rejection Ratio Specification ............ 5

Change to Table 5, Ripple Rejection Ratio Specification ............ 6

Change to Table 6, Ripple Rejection Ratio Specification ............ 7

9/06—Rev. 0 to Rev. A

Updated Format.................................................................. Universal

Changes to Features ..........................................................................1

Changes to Pin Configurations .......................................................1

Changes to Specifications Section...................................................3

Changes to Figure 4 and Figure 5....................................................9

Inserted Figure 6 and Figure 7.........................................................9

Changes to Figure 15...................................................................... 11

Changes to Power Dissipation Considerations Section ............ 14

Changes to Figure 35 and Figure 36............................................. 15

Changes to Figure 38 and Table 9................................................. 16

Updated Outline Dimensions....................................................... 18

Changes to Ordering Guide.......................................................... 19

10/05—Revision 0: Initial Version

Rev. E | Page 2 of 20

ADR440/ADR441/ADR443/ADR444/ADR445

SPECIFICATIONS

ADR440 ELECTRICAL CHARACTERISTICS

VIN = 3 V to 18 V, TA = 25°C, CIN = C

Table 2.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE VO

A Grade

B Grade

INITIAL ACCURACY V

A Grade

0.15 %

B Grade 1 mV

0.05 %
TEMPERATURE DRIFT TCVO

A Grade −40°C < TA < +125°C 2 10 ppm/°C

B Grade −40°C < TA < +125°C 1 3 ppm/°C

LINE REGULATION ΔVO/ΔVIN −40°C < TA < +125°C −20 +10 +20 ppm/V
LOAD REGULATION ΔVO/ΔI

ΔVO/ΔI

QUIESCENT CURRENT IIN No load, −40°C < TA < +125°C 3 3.75 mA
VOLTAGE NOISE eN p-p 0.1 Hz to 10 Hz 1 μV p-p
VOLTAGE NOISE DENSITY eN 1 kHz 45 nV/√Hz
TURN-ON SETTLING TIME tR 10 μs
LONG-TERM STABILITY1 V
OUTPUT VOLTAGE HYSTERESIS V
RIPPLE REJECTION RATIO RRR fIN = 1 kHz −80 dB
SHORT CIRCUIT TO GND ISC 27 mA
SUPPLY VOLTAGE OPERATING RANGE VIN 3 18 V
SUPPLY VOLTAGE HEADROOM VIN − VO 500 mV

1

The long-term stability specification is noncumulative. The drift in the subsequent 1000-hour period is significantly lower than in the first 1000-hour period.

= 0.1 µF, unless otherwise noted.

OUT

OERR

LOAD

2.045 2.048 2.051 V

2.047 2.048 2.049 V

3 mV

= 0 mA to 10 mA, VIN = 3.5 V,

I

LOAD

−40°C < T

LOAD

= 0 mA to −5 mA, VIN = 3.5 V,

I

LOAD

−40°C < T

1000 hours 50 ppm

O

70 ppm

O_HYS

< +125°C

A

< +125°C

A

−50 +50 ppm/mA

−50 +50 ppm/mA

Rev. E | Page 3 of 20

ADR440/ADR441/ADR443/ADR444/ADR445

ADR441 ELECTRICAL CHARACTERISTICS

VIN = 3 V to 18 V, TA = 25°C, CIN = C

Table 3.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE VO

A Grade
B Grade

INITIAL ACCURACY V

A Grade

0.12 %
B Grade 1 mV

0.04 %
TEMPERATURE DRIFT TCVO

A Grade −40°C < TA < +125°C 2 10 ppm/°C

B Grade −40°C < TA < +125°C 1 3 ppm/°C
LINE REGULATION ΔVO/ΔVIN −40°C < TA < +125°C 10 20 ppm/V
LOAD REGULATION ΔVO/ΔI

ΔVO/ΔI

QUIESCENT CURRENT IIN No load, −40°C < TA < +125°C 3 3.75 mA
VOLTAGE NOISE eN p-p 0.1 Hz to 10 Hz 1.2 μV p-p
VOLTAGE NOISE DENSITY eN 1 kHz 48 nV/√Hz
TURN-ON SETTLING TIME tR 10 μs
LONG-TERM STABILITY1 V
OUTPUT VOLTAGE HYSTERESIS V
RIPPLE REJECTION RATIO RRR fIN = 1 kHz −80 dB
SHORT CIRCUIT TO GND ISC 27 mA
SUPPLY VOLTAGE OPERATING RANGE VIN 3 18 V
SUPPLY VOLTAGE HEADROOM VIN − VO 500 mV

1

The long-term stability specification is noncumulative. The drift in subsequent 1000-hour period is significantly lower than in the first 1000-hour period.

= 0.1 µF, unless otherwise noted.

OUT

OERR

LOAD

2.497 2.500 2.503 V

2.499 2.500 2.501 V

3 mV

= 0 mA to 10 mA, VIN = 4 V,

I

LOAD

−40°C < T

LOAD

= 0 mA to −5 mA, VIN = 4 V,

I

LOAD

−40°C < T

1000 hours 50 ppm

O

70 ppm

O_HYS

< +125°C

A

< +125°C

A

−50 +50 ppm/mA

−50 +50 ppm/mA

Rev. E | Page 4 of 20

ADR440/ADR441/ADR443/ADR444/ADR445

ADR443 ELECTRICAL CHARACTERISTICS

VIN = 3.5 V to 18 V, TA = 25°C, CIN = C

Table 4.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE VO

A Grade
B Grade

INITIAL ACCURACY V

A Grade

0.13 %
B Grade 1.2 mV

0.04 %
TEMPERATURE DRIFT TCVO

A Grade −40°C < TA < +125°C 2 10 ppm/°C

B Grade −40°C < TA < +125°C 1 3 ppm/°C
LINE REGULATION ΔVO/ΔVIN −40°C < TA < +125°C 10 20 ppm/V
LOAD REGULATION ΔVO/ΔI

ΔVO/ΔI

QUIESCENT CURRENT IIN No load, −40°C < TA < +125°C 3 3.75 mA
VOLTAGE NOISE eN p-p 0.1 Hz to 10 Hz 1.4 μV p-p
VOLTAGE NOISE DENSITY eN 1 kHz 57.6 nV/√Hz
TURN-ON SETTLING TIME tR 10 μs
LONG-TERM STABILITY1 V
OUTPUT VOLTAGE HYSTERESIS V
RIPPLE REJECTION RATIO RRR fIN = 1 kHz −80 dB
SHORT CIRCUIT TO GND ISC 27 mA
SUPPLY VOLTAGE OPERATING RANGE VIN 3.5 18 V
SUPPLY VOLTAGE HEADROOM VIN − VO 500 mV

1

The long-term stability specification is noncumulative. The drift in the subsequent 1000-hour period is significantly lower than in the first 1000-hour period.

= 0.1 µF, unless otherwise noted.

OUT

OERR

LOAD

2.996 3.000 3.004 V

2.9988 3.000 3.0012 V

4 mV

= 0 mA to 10 mA, VIN = 5 V,

I

LOAD

−40°C < T

LOAD

= 0 mA to −5 mA, VIN = 5 V,

I

LOAD

−40°C < T

1000 hours 50 ppm

O

70 ppm

O_HYS

< +125°C

A

< +125°C

A

−50 +50 ppm/mA

−50 +50 ppm/mA

Rev. E | Page 5 of 20

ADR440/ADR441/ADR443/ADR444/ADR445

ADR444 ELECTRICAL CHARACTERISTICS

VIN = 4.6 V to 18 V, TA = 25°C, CIN = C

Table 5.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE VO

A Grade
B Grade

INITIAL ACCURACY V

A Grade

0.13 %
B Grade 1.6 mV

0.04 %
TEMPERATURE DRIFT TCVO

A Grade −40°C < TA < +125°C 2 10 ppm/°C

B Grade −40°C < TA < +125°C 1 3 ppm/°C
LINE REGULATION ΔVO/ΔVIN −40°C < TA < +125°C 10 20 ppm/V
LOAD REGULATION ΔVO/ΔI

ΔVO/ΔI

QUIESCENT CURRENT IIN No load, −40°C < TA < +125°C 3 3.75 mA
VOLTAGE NOISE eN p-p 0.1 Hz to 10 Hz 1.8 μV p-p
VOLTAGE NOISE DENSITY eN 1 kHz 78.6 nV/√Hz
TURN-ON SETTLING TIME tR 10 μs
LONG-TERM STABILITY1 V
OUTPUT VOLTAGE HYSTERESIS V
RIPPLE REJECTION RATIO RRR fIN = 1 kHz −80 dB
SHORT CIRCUIT TO GND ISC 27 mA
SUPPLY VOLTAGE OPERATING RANGE VIN 4.6 18 V
SUPPLY VOLTAGE HEADROOM VIN − VO 500 mV

1

The long-term stability specification is noncumulative. The drift in the subsequent 1000-hour period is significantly lower than in the first 1000-hour period.

= 0.1 µF, unless otherwise noted.

OUT

OERR

1000 hours 50 ppm

O

70 ppm

O_HYS

4.091 4.096 4.101 V

4.0944 4.096 4.0976 V

5 mV

LOAD

LOAD

= 0 mA to 10 mA, VIN = 5.5 V,

I

LOAD

−40°C < T
I

LOAD

−40°C < T

< +125°C

A

= 0 mA to −5 mA, VIN = 5.5 V,

< +125°C

A

−50 +50 ppm/mA

−50 +50 ppm/mA

Rev. E | Page 6 of 20