Datasheet ADR5045 Datasheet (ANALOG DEVICES)

Precision Micropower Shunt Mode

A

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ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

FEATURES

Ultracompact SC70 and SOT-23 packages
Low temperature coefficient: 75 ppm/°C (maximum)
Pin compatible with LM4040/LM4050
Initial accuracy: ±0.1%
No external capacitor required
Wide operating current range: 50 μA to 15 mA
Extended temperature range: −40°C to +125°C

APPLICATIONS

Portable, battery-powered equipment
Automotives
Power supplies
Data acquisition systems
Instrumentation and process control
Energy management

GENERAL DESCRIPTION

Designed for space-critical applications, the ADR5040/
ADR5041/ADR5043/ADR5044/ADR5045 are high precision
shunt voltage references, housed in ultrasmall SC70 and SOT-23
packages. These voltage references are multipurpose, easy-to-use
references that can be used in a vast array of applications. They
feature low temperature drift, an initial accuracy of better than

0.1%, and fast settling time.

Available in output voltages of 2.048 V, 2.5 V, 3.0 V, 4.096 V, and

, the advanced design of the ADR5040/ADR5041/ADR5043/

5.0 V
ADR5044/ADR5045 eliminates the need for compensation by an
external capacitor, yet the references are stable with any capacitive
load. The minimum operating current increases from 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. This family of references has been characterized
over the extended temperature range of −40°C to +125°C.

Voltage References

PIN CONFIGURATION

DR5040/ADR5041/

ADR5043/ADR5044/

ADR5045

V+ 1

NC3

2

V–

NOTES

1. NC = NO CONNECT .

2. PIN 3 MUST BE LEFT FLOATING OR
CONNECTED TO GROUND.

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

Table 1. Selection Table

Initial
A

Part Voltage (V)

ADR5040A 2.048 ±0.2 100
ADR5040B 2.048 ±0.1 75
ADR5041A 2.5 ±0.2 100
ADR5041B 2.5 ±0.1 75
ADR5043A 3.0 ±0.2 100
ADR5043B 3.0 ±0.1 75
ADR5044A 4.096 ±0.2 100
ADR5044B 4.096 ±0.1 75
ADR5045A 5.0 ±0.2 100
ADR5045B 5.0 ±0.1 75

ccuracy (%)

06526-001

Temperature
C

oefficient

(ppm/°C)

Rev. A

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2007 Analog Devices, Inc. All rights reserved.

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TABLE OF CONTENTS

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

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

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

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

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

Specifications..................................................................................... 4

ADR5040 Electrical Characteristics .......................................... 4

ADR5041 Electrical Characteristics .......................................... 4

ADR5043 Electrical Characteristics .......................................... 5

ADR5044 Electrical Characteristics .......................................... 5

REVISION HISTORY

12/07—Rev. 0 to Rev. A

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

Changes to Initial Accuracy and Temperature Coefficient

Parameters in Table 2 Through Table 6 ......................................... 3

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

Changes to Ordering Guide.......................................................... 13

1/07—Revision 0: Initial Version

ADR5045 Electrical Characteristics ...........................................6

Absolute Maximum Ratings ............................................................7

Thermal Resistance.......................................................................7

ESD Caution...................................................................................7

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

Terminology .................................................................................... 11

Theory of Operation ...................................................................... 12

Applications Information.......................................................... 12

Outline Dimensions....................................................................... 14

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

Rev. A | Page 2 of 17

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SPECIFICATIONS

ADR5040 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 2.044 2.048 2.052 V
Grade B 2.046 2.048 2.050 V

INITIAL ACCURACY V

IIN = 100 μA

OERR

Grade A –4.096 +4.096 mV

±0.2 %

Grade B –2.048 +2.048 mV
±0.1 %
TEMPERATURE COEFFICIENT1 TCV

–40°C < TA < +125°C

OUT

Grade A 10 100 ppm/°C

Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. IIN ∆VR I
–40°C < TA < +125°C 0.4 1.75 mV
I
–40°C < TA < +125°C 4 8 mV
DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR) IIN = 50 μA to 15 mA 0.2 Ω
MINIMUM OPERATING CURRENT I

T

IN

–40°C < TA < +125°C 60 μA
VOLTAGE NOISE eN I
I
TURN-ON SETTLING TIME tR C
OUTPUT VOLTAGE HYSTERESIS ∆V

1

Guaranteed by design.

IIN = 1 mA 40 ppm

OUT_HYS

IIN = 100 μA

= 50 μA to 1 mA

IN

= 1 mA to 15 mA

IN

= 25°C 50 μA

A

= 100 μA; 0.1 Hz to 10 Hz 2.8 μV rms

IN

= 100 μA; 10 Hz to 10 kHz 120 μV rms

IN

= 0 μF 28 μs

LOAD

ADR5041 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 2.495 2.500 2.505 V

Grade B 2.4975 2.500 2.5025 V
INITIAL ACCURACY V

Grade A –5 +5 mV

±0.2 %

Grade B –2.5 +2.5 mV
±0.1 %
TEMPERATURE COEFFICIENT

1

Grade A 10 100 ppm/°C

Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. IIN ∆VR I
–40°C < TA < +125°C 0.5 1.8 mV
I
–40°C < TA < +125°C 4 8 mV

I

OUT

IIN = 100 μA

OERR

TCV

–40°C < TA < +125°C

OUT

= 100 μA

IN

= 50 μA to 1 mA

IN

= 1 mA to 15 mA

IN

Rev. A | Page 3 of 16

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Parameter Symbol Conditions Min Typ Max Unit

DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR) IIN = 50 μA to 15 mA 0.2 Ω
MINIMUM OPERATING CURRENT IIN TA = 25°C 50 μA
–40°C < TA < +125°C 60 μA
VOLTAGE NOISE eN I
I
TURN-ON SETTLING TIME tR C
OUTPUT VOLTAGE HYSTERESIS ∆V

1

Guaranteed by design.

IIN = 1 mA 40 ppm

OUT_HYS

ADR5043 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

IIN = 100 μA

OUT

Grade A 2.994 3.000 3.006 V
Grade B 2.997 3.000 3.003 V

INITIAL ACCURACY V

IIN = 100 μA

OERR

Grade A –6 +6 mV
±0.2 %

Grade B –3 +3 mV
±0.1 %
TEMPERATURE COEFFICIENT

1

TCV

–40°C < TA < +125°C

OUT

Grade A 10 100 ppm/°C

Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. IIN ∆VR IIN = 50 μA to 1 mA
–40°C < TA < +125°C 0.7 2.2 mV
I
–40°C < TA < +125°C 4 8 mV
DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR) IIN = 50 μA to 15 mA 0.2 Ω
MINIMUM OPERATING CURRENT IIN TA = 25°C 50 μA
–40°C < TA < +125°C 60 μA
VOLTAGE NOISE eN I
I
TURN-ON SETTLING TIME tR C
OUTPUT VOLTAGE HYSTERESIS ∆V

1

Guaranteed by design.

IIN = 1 mA 40 ppm

OUT_HYS

ADR5044 ELECTRICAL CHARACTERISTICS

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

= 100 μA; 0.1 Hz to 10 Hz 3.2 μV rms

IN

= 100 μA; 10 Hz to 10 kHz 150 μV rms

IN

= 0 μF 35 μs

LOAD

= 1 mA to 15 mA

IN

= 100 μA; 0.1 Hz to 10 Hz 4.3 μV rms

IN

= 100 μA; 10 Hz to 10 kHz 180 μV rms

IN

= 0 μF 42 μs

LOAD

Table 5.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE V

I

OUT

= 100 μA

IN

Grade A 4.088 4.096 4.104 V

Grade B 4.092 4.096 4.100 V
INITIAL ACCURACY V

IIN = 100 μA

OERR

Grade A –8.192 +8.192 mV

±0.2 %

Grade B –4.096 +4.096 mV
±0.1 %

Rev. A | Page 4 of 16

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Parameter Symbol Conditions Min Typ Max Unit

TEMPERATURE COEFFICIENT

Grade A 10 100 ppm/°C

Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. IIN ∆VR IIN = 50 μA to 1 mA
–40°C < TA < +125°C 0.7 3 mV
I
–40°C < TA < +125°C 4 8 mV
DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR) IIN = 50 μA to 15 mA 0.2 Ω
MINIMUM OPERATING CURRENT I
–40°C < TA < +125°C 60 μA
VOLTAGE NOISE eN I
I
TURN-ON SETTLING TIME tR C
OUTPUT VOLTAGE HYSTERESIS ∆V

1

Guaranteed by design.

ADR5045 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 4.990 5.000 5.010 V

Grade B 4.995 5.000 5.005 V
INITIAL ACCURACY V

Grade A –10 +10 mV

±0.2 %

Grade B –5 +5 mV
±0.1 %
TEMPERATURE COEFFICIENT

Grade A 10 100 ppm/°C

Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. IIN ∆VR IIN = 50 μA to 1 mA
–40°C < TA < +125°C 0.8 4 mV
I
–40°C < TA < +125°C 4 8 mV
DYNAMIC OUTPUT IMPEDANCE (∆VR/∆IR) IIN = 50 μA to 15 mA 0.2 Ω
MINIMUM OPERATING CURRENT IIN TA = 25°C 50 μA
–40°C < TA < +125°C 60 μA
VOLTAGE NOISE eN I
I
TURN-ON SETTLING TIME tR C
OUTPUT VOLTAGE HYSTERESIS ∆V

1

Guaranteed by design.

1

1

TCV

–40°C < TA < +125°C

OUT

= 1 mA to 15 mA

IN

T

IN

I

OUT_HYS

OUT

IIN = 100 μA

OERR

TCV

–40°C < TA < +125°C

OUT

IIN = 1 mA 40 ppm

OUT_HYS

= 25°C 50 μA

A

= 100 μA; 0.1 Hz to 10 Hz 5.4 μV rms

IN

= 100 μA; 10 Hz to 10 kHz 240 μV rms

IN

= 0 μF 56 μs

LOAD

= 1 mA 40 ppm

IN

IIN = 100 μA

= 1 mA to 15 mA

IN

= 100 μA; 0.1 Hz to 10 Hz 6.6 μV rms

IN

= 100 μA; 10 Hz to 10 kHz 280 μV rms

IN

= 0 μF 70 μs

LOAD

Rev. A | Page 5 of 16

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ABSOLUTE MAXIMUM RATINGS

Ratings apply at 25°C, unless otherwise noted.

Table 7.

Parameter Rating

Reverse Current 25 mA
Forward Current 20 mA
Storage Temperature Range –65°C to +150°C
Extended Temperature Range –40°C to +125°C
Junction Temperature Range –65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C

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.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.

Table 8. Thermal Resistance

Package Type θJA θ

3-Lead SC70 (KS) 580.5
3-Lead SOT-23 (RT) 270 102 °C/W

Unit

JC

177.4

°C/W

ESD CAUTION

Rev. A | Page 6 of 16

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TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, IIN = 100 μA, unless otherwise noted.

6

4

2

0

–2

CHANGE (mV)

OUT

–4

V

–6

IR = 150µA

15

IR = 150µA

10

)

5

V
m

(

E
G
N

0

A
H
C

T
U
O

–5

V

–10

–8

–40 –25 –10 5 20 35 50 65 80 95 110 125

Figure 2. ADR5041 V

5

4

3

2

1

REVERSE VOLTAGE CHANGE (mV)

0

0 5 10 15 20

Figure 3. ADR5041 Reverse Voltage Change vs. I

TEMPERATURE (°C)

Change vs. Temperature

OUT

+125°C

+25°C

–40°C

I

(mA)

SHUNT

SHUNT

–15

06526-003

–40–25–105 203550658095110125

Figure 5. ADR5045 V

8

6

4

2

0

–2

–4

REVERSE VOLTAGE CHANGE (mV)

–6

–8

06526-004

0 5 10 15 20

Figure 6. ADR5045 Reverse Voltage Change vs. I

TEMPERATURE (°C)

Change vs. Temperature

OUT

+125°C

I

(mA)

SHUNT

–40°C

+25°C

SHUNT

06526-005

06526-006

V

IN

1V/DI

V

OUT

10µs/DIV

06526-007

Figure 4. ADR5041 Start-Up Characteristics

Rev. A | Page 7 of 16

V

IN

2V/DI

V

OUT

10µs/DIV

Figure 7. ADR5045 Start-Up Characteristics

06526-010

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

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+25µA

(2V/DIV)

GEN

AC-COUPLED V

I

R

V

= 100µA ± 25µA

SHUNT

R

= 100kΩ

L

10µs/DIV

–25µA

2mV/DIV

06526-008

Figure 8. ADR5041 Load Transient Response

+250µA

GEN

–250µA

(2V/DIV)

GEN

AC-COUPLED V

I

R

V

= 100mA ± 25µA

SHUNT

R

= 100kΩ

L

40µs/DIV

Figure 11. ADR5045 Load Transient Response

GEN

+25µA

–25µA

10mV/DIV

+250µA

–250µA

06526-011

AC-COUPLED V

I

SHUNT

R

L

= 10kΩ

= 1mA ± 250µA

10µs/DIV

R

V

Figure 9. ADR5041 Transient Response

GEN

AC-COUPLED V

I

R

V

= 10mA ± 2.5mA

SHUNT

R

= 1kΩ

L

10µs/DIV

Figure 10. ADR5041 Transient Response

10mV/DIV

+2.5mA

–2.5mA

20mV/DIV

AC-COUPLED V

I

SHUNT

R

L

= 10kΩ

= 1mA ± 250µA

10µs/DIV

R

V

06526-009

Figure 12. ADR5045 Transient Response

(2V/DIV)

GEN

AC-COUPLED V

I

R

V

06526-013

= 10mA ± 2.5mA

SHUNT

R

= 1kΩ

L

10µs/DIV

Figure 13. ADR5045 Transient Response

10mV/DIV

+2.5mA

–2.5mA

20mV/DIV

06526-012

06526-016

Rev. A | Page 8 of 16

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10k

10k

1k

100

10

IMPEDANCE (Ω)

1

0.1
100 1k 10k 100k 1M

IIN = 150µA

C = 1µF

IIN = 1mA

FREQUENCY ( Hz)

C = 0µF

Figure 14. ADR5041 Output Impedance vs. Frequency

10k

NOISE (n V/ Hz)

1k

100

10

IMPEDANCE (Ω)

1

0.1

06526-014

100 1k 10k 100k 1M

IIN = 150µA

C = 1µF

IIN = 1mA

FREQUENCY ( Hz)

C = 0µF

06526-017

Figure 17. ADR5045 Output Impedance vs. Frequency

10k

NOISE (nV/ Hz)

1k

1 10 100 1k 10k

FREQUENCY ( Hz)

06526-015

Figure 15. ADR5041 Voltage Noise Density

100

90

80

70

60

50

40

30

REVERSE CURRENT (µA)

20

10

0

0123456

2.048V

REVERSE VOLTAGE (V)

2.5V

3V 4.096V 5V

06526-002

Figure 16. ADR504x Reverse Characteristics and Minimum Operating Current

1k

1 10 100 1k 10k

FREQUENCY ( Hz)

Figure 18. ADR5045 Voltage Noise Density

06526-018

Rev. A | Page 9 of 16

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

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TERMINOLOGY

Temperature Coefficient

The change in output voltage with respect to operating temperature

hanges. It is normalized by an output voltage of 25°C. This

c
parameter is expressed in ppm/°C and is determined by the
following equation:

() ()

−

TCV

OUT

ppm

⎡
⎢

⎣

⎤

=

⎥

°

⎦

2

OUT

()

O

C25C

UT

TVTV

1

OUT

()

−×°

6

10

×

TTV

(1)

12

where:

V

OUT

V

OUT(T1

V

OUT(T2

(25°C) = V

) = V
) = V

at 25°C.

OUT

at Temperature 1.

OUT

at Temperature 2.

OUT

Thermal Hysteresis

The change in output voltage after the device is cycled through

emperatures ranging from +25°C to −40°C, then to +125°C, and

t
back to +25°C. This is common in precision reference and is
caused by thermal-mechanical package stress. Changes in envi­ronmental storage temperature, board mounting temperature, and
the operating temperature are some of the factors that can
contribute to thermal hysteresis. The following equation
expresses a typical value from a sample of parts put through
such a cycle:

)

C25

−°=

VVV

TCOUTOUTHYSOUT

__

()

C25

−°

VV

TCOUTOUT

[]

ppm

V

HYSOUT

_

=

()

V

OUT

_

C25

°

(2)

6

10

×

where:

V
V

OUT

OUT_TC

(25°C) = V

= V

at 25°C.

OUT

at 25°C after a temperature cycle from +25°C to

OUT

−40°C, then to +125°C, and back to +25°C.

Rev. A | Page 10 of 16

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THEORY OF OPERATION

The ADR504x family uses the band gap concept to produce
a stable, low temperature coefficient voltage reference suitable
for high accuracy data acquisition components and systems. The
devices use the physical nature of a silicon transistor base-emitter
voltage in the forward-biased operating region. All such transistors
have approximately a −2 mV/°C temperature coefficient (TC),
making them unsuitable for direct use as a low temperature
coefficient reference. Extrapolation of the temperature charac­teristic of any one of these devices to absolute zero (with the
collector current proportional to the absolute temperature),
however, reveals that its V

approaches approximately the

BE

silicon band gap voltage. Therefore, if a voltage develops with
an opposing temperature coefficient to sum the V

, a zero

BE

temperature coefficient reference results.

APPLICATIONS INFORMATION

The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 are
a series of precision shunt voltage references. They are designed
to operate without an external capacitor between the positive
and negative terminals. If a bypass capacitor is used to filter the
supply, the references remain stable.

For a stable voltage, all shunt voltage references require an

xternal bias resistor (R

e
reference (see Figure 19). The R
through the load (I
and the supply voltage can vary, the R
based on the following considerations:

• R

must be small enough to supply the minimum I

BIAS

to the ADR5040/ADR5041/ADR5043/ADR5044/ADR5045,
even when the supply voltage is at its minimum value and
the load current is at its maximum value.

• R

must be large enough so that IIN does not exceed 15 mA

BIAS

when the supply voltage is at its maximum value and the
load current is at its minimum value.

Given these conditions, R
voltage (V

), the ADR5040/ADR5041/ADR5043/ADR5044/

S

ADR5045 load and operating current (I
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 output
voltage (V

).

OUT

−

S

=

R

BIAS

+

) between the supply voltage and the

BIAS

sets the current that flows

BIAS

) and the reference (IIN). Because the load

L

needs to be chosen

BIAS

current

IN

is determined by the supply

BIAS

and IIN), and the

L

VV

OUT

(3)

II

INL

Precision Negative Voltage Reference

The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 are
suitable for applications where a precise negative voltage is desired.
Figure 20 shows the ADR5045 configured to provide a negative

utput. Caution should be exercised in using a low temperature

o
sensitive resistor to avoid errors from the resistor.

Figure 20. Negative Precision Reference Configuration

Stacking the ADR504x for User-Definable Outputs

Multiple ADR504x parts can be stacked together to allow the
user to obtain a desired higher voltage. Figure 21a shows three

R5045 devices configured to give 15 V. The bias resistor,

AD

, is chosen using Equation 3, noting that the same bias current

R

BIAS

flows through all the shunt references in series. Figure 21b shows

ee ADR5045 devices stacked together to give −15 V. R

thr
calculated in the same manner as before. Parts of different voltages
can also be added together; that is, an ADR5041 and an ADR5045
can be added together to give an output of +7.5 V or −7.5 V, as
desired. Note, however, that the initial accuracy error is the sum
of the errors of all the stacked parts, as are the temperature
coefficient and output voltage change vs. input current.

DR5045
DR5045
DR5045

Figure 21. ±15 V Output with Stacked ADR5045 Devices

S

R

IIN + I

BIAS

I

IN

DD

R

BIAS

(a) (b)

L

I

L

ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045

Figure 19. Shunt Reference

ADR5045

R

BIAS

V

CC

ADR5045
ADR5045

+15V

ADR5045

V

OUT

06526-019

V

OUT

–5V

06526-020

is

BIAS

–15V

R

BIAS

–V

DD

06526-021

Rev. A | Page 11 of 16

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Adjustable Precision Voltage Source

The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045,
combined with a precision low input bias op amp such as the

AD8610, can be used to output a precise adjustable voltage.

Figure 22 illustrates the implementation of this application

g the ADR5040/ADR5041/ADR5043/ADR5044/ADR5045.

usin
The output of the op amp, V

, is determined by the gain of the

OUT

circuit, which is completely dependent on the resistors, R1 and R2.

= (1 + R2/R1)V

V

OUT

REF

An additional capacitor, C1, in parallel with R2, can be added to

ilter out high frequency noise. The value of C1 is dependent on

f
the value of R2.

CC

R

BIAS

V

REF

ADR5040/ADR5041/
ADR5043/ADR5044/

ADR5045

Figure 22. Adjustable Voltage Source

GND

AD8610

R2

R1

C1

(OPTIO NAL)

= V

V

OUT

(1 + R2/R1)

REF

06526-022

Programmable Current Source

By using just a few ultrasmall and inexpensive parts, it is possible
to build a programmable current source, as shown in Figure 23.

e constant voltage on the gate of the transistor sets the current

Th
through the load. Varying the voltage on the gate changes the

2

current. The AD5247 is a digital potentiometer with I

C® digital

interface, and the AD8601 is a precision rail-to-rail input op

p. Each incremental step of the digital potentiometer increases

am
or decreases the voltage at the noninverting input of the op amp.
Therefore, this voltage varies with respect to the reference
voltage.

DD

R

BIAS

ADR5040/
ADR5041/
ADR5043/
ADR5044/
ADR5045

AD5247

Figure 23. Programmable Current Source

V+

AD8601

V–

R

SENSE

I

LOAD

06526-023

Rev. A | Page 12 of 16

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

www.BDTIC.com/ADI

OUTLINE DIMENSIONS

2.20

2.00

1.35

1.25

1.15

PIN 1

1.00

0.80

0.10 MAX

0.10 COPLANARITY

Figure 24. 3-Lead Thin Shrink Small Outline Transistor Package [SC70]

1.40

1.20

1.80

21

0.65 BSC

2.40

2.10

1.80

1.10

0.80

SEATING
PLANE

0.26

0.10

0.40

0.10

3

0.40

0.25

ALL DIMENSIONS COMPLIANT WITH EIAJ SC70

(KS-3)

Dimensions shown in millimeters

3.04

2.80

3

1

2.64

2.10

2

0.30

0.20

0.10

111505-0

0.60

0.100

0.013

SEATING

PLANE

0.45

2.05

1.78

COMPLIANT TO JEDEC STANDARDS TO-236-AB

Figure 25. 3-Lead Small Outline Transistor Package [SOT-23-3]

1.03

0.89

0.51

0.37

1.12

0.89

0.180

0.085

0.55
REF

092707-A

(RT-3)

Dimensions shown in millimeters

ORDERING GUIDE

Output

Model

ADR5040AKSZ-R2

Voltage
(V)

1

2.048 4.096 100 –40°C to +125°C 3-Lead SC70 KS-3 250 R2J
ADR5040AKSZ-REEL12.048 4.096 100 –40°C to +125°C 3-Lead SC70 KS-3 10,000 R2J
ADR5040AKSZ-REEL712.048 4.096 100 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2J
ADR5040ARTZ-R2

1

2.048 4.096 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2J
ADR5040ARTZ-REEL12.048 4.096 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2J
ADR5040ARTZ-REEL712.048 4.096 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2J
ADR5040BKSZ-R2

1

2.048 2.048 75 –40°C to +125°C 3-Lead SC70 KS-3 250 R2L
ADR5040BKSZ-REEL712.048 2.048 75 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2L
ADR5040BRTZ-R2

1

2.048 2.048 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2L
ADR5040BRTZ-REEL712.048 2.048 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2L

Initial
Accuracy
(mV)

Tempco
Industrial
(ppm/°C)

Temperature

nge

Ra

Package
Description

Package
Option

Ordering
Quantity Branding

Rev. A | Page 13 of 16

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

www.BDTIC.com/ADI

Output

Model

ADR5041AKSZ-R2

Voltage
(V)

1

2.500 5 100 –40°C to +125°C 3-Lead SC70 KS-3 250 R2N
ADR5041AKSZ-REEL12.500 5 100 –40°C to +125°C 3-Lead SC70 KS-3 10,000 R2N
ADR5041AKSZ-REEL712.500 5 100 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2N
ADR5041ARTZ-R2

1

2.500 5 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2N
ADR5041ARTZ-REEL12.500 5 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2N
ADR5041ARTZ-REEL712.500 5 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2N
ADR5041BKSZ-R2

1

2.500 2.5 75 –40°C to +125°C 3-Lead SC70 KS-3 250 R2Q
ADR5041BKSZ-REEL712.500 2.5 75 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2Q
ADR5041BRTZ-R2

1

2.500 2.5 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2Q
ADR5041BRTZ-REEL712.500 2.5 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Q
ADR5043AKSZ-R2

1

3.0 6 100 –40°C to +125°C 3-Lead SC70 KS-3 250 R2S
ADR5043AKSZ-REEL13.0 6 100 –40°C to +125°C 3-Lead SC70 KS-3 10,000 R2S
ADR5043AKSZ-REEL713.0 6 100 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2S
ADR5043ARTZ-R2

1

3.0 6 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2S
ADR5043ARTZ-REEL13.0 6 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2S
ADR5043ARTZ-REEL713.0 6 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2S
ADR5043BKSZ-R2

1

3.0 3 75 –40°C to +125°C 3-Lead SC70 KS-3 250 R2U
ADR5043BKSZ-REEL713.0 3 75 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2U
ADR5043BRTZ-R2

1

3.0 3 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2U
ADR5043BRTZ-REEL713.0 3 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2U
ADR5044AKSZ-R2

1

4.096 8.192 100 –40°C to +125°C 3-Lead SC70 KS-3 250 R2W
ADR5044AKSZ-REEL14.096 8.192 100 –40°C to +125°C 3-Lead SC70 KS-3 10,000 R2W
ADR5044AKSZ-REEL714.096 8.192 100 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2W
ADR5044ARTZ-R2

1

4.096 8.192 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2W
ADR5044ARTZ-REEL14.096 8.192 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2W
ADR5044ARTZ-REEL714.096 8.192 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2W
ADR5044BKSZ-R2

1

4.096 4.096 75 –40°C to +125°C 3-Lead SC70 KS-3 250 R2Y
ADR5044BKSZ-REEL714.096 4.096 75 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R2Y
ADR5044BRTZ-R2

1

4.096 4.096 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2Y
ADR5044BRTZ-REEL714.096 4.096 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Y
ADR5045AKSZ-R2

1

5.0 10 100 –40°C to +125°C 3-Lead SC70 KS-3 250 R30
ADR5045AKSZ-REEL15.0 10 100 –40°C to +125°C 3-Lead SC70 KS-3 10,000 R30
ADR5045AKSZ-REEL715.0 10 100 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R30
ADR5045ARTZ-R2

1

5.0 10 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R30
ADR5045ARTZ-REEL15.0 10 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R30
ADR5045ARTZ-REEL715.0 10 100 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R30
ADR5045BKSZ-R2

1

5.0 5 75 –40°C to +125°C 3-Lead SC70 KS-3 250 R32
ADR5045BKSZ-REEL715.0 5 75 –40°C to +125°C 3-Lead SC70 KS-3 3,000 R32
ADR5045BRTZ-R2

1

5.0 5 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R32
ADR5045BRTZ-REEL715.0 5 75 –40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R32

1

Z = RoHS Compliant Part.

Initial
Accuracy
(mV)

Tempco
Industrial
(ppm/°C)

Temperature

nge

Ra

Package
Description

Package
Option

Ordering
Quantity Branding

Rev. A | Page 14 of 16

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

www.BDTIC.com/ADI

NOTES

Rev. A | Page 15 of 16

ADR5040/ADR5041/ADR5043/ADR5044/ADR5045

www.BDTIC.com/ADI

NOTES

Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I2C Patent
Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.

©2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06526-0-12/07(A)

Rev. A | Page 16 of 16