Precision Micropower Shunt Mode
Voltage References
Data Sheet
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C Document Feedback
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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
Qualified for automotive applications
APPLICATIONS
Portable, battery-powered equipment
Automotives
Power supplies
Data acquisition systems
Instrumentation and process control
Energy management
PIN CONFIGURATION
06526-001
NOTES
1. NC = NO CONNECT.
2. PIN 3 MUST BE LEFT FLOATING OR
CONNECTED TO GRO UND.
ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045
V+ 1
V– 2
NC
3
Figure 1. 3-Lead SC70 (KS) and 3-Lead SOT-23 (RT)
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
5.0 V, the advanced design of the ADR5040/ADR5041/ADR5043/
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. The
ADR5041W and the ADR5044W are qualified for automotive
applications and are available in a 3-lead SOT-23 package.
Table 1. Selection Table
Device Voltage (V)
Initial
Accuracy (%)
Temperature
Coefficient
(ppm/°C)
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
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 2 of 16
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configuration ............................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
ADR5040 Electrical Characteristics .......................................... 3
ADR5041 Electrical Characteristics .......................................... 3
ADR5043 Electrical Characteristics .......................................... 4
ADR5044 Electrical Characteristics .......................................... 4
ADR5045 Electrical Characteristics .......................................... 5
Absolute Maximum Ratings ............................................................6
Thermal Resistance .......................................................................6
ESD Caution...................................................................................6
Typical Performance Characteristics ..............................................7
Terminology .................................................................................... 10
Theory of Operation ...................................................................... 11
Applications Information .......................................................... 11
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 14
Automotive Products ................................................................. 15
REVISION HISTORY
3/16—Rev. B to Re v. C
Change to Figure 7 ........................................................................... 7
Changed Stacking the ADR504x for User-Definable Outputs
Section to Stacking the ADR5040/ADR5041/ADR5043/
ADR5044/ADR5045 for User-Definable Outputs Section ....... 11
Changes to Figure 23 ...................................................................... 12
8/12—Rev. A to Rev. B
Changes to Features Section and General Description Section ...... 1
Updated Outline Dimensions ....................................................... 13
Moved Ordering Guide .................................................................. 14
Changes to Ordering Guide .......................................................... 14
Added Automotive Products Section .......................................... 15
12/07—Rev. 0 to Rev. A
Changes to Features .......................................................................... 1
Changes to Initial Accuracy and Temp erature Coefficient
Parameters in Table 2 Through Table 6 .......................................... 3
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
1/07—Revision 0: Initial Version
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 3 of 16
SPECIFICATIONS
ADR5040 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE VOUT IIN = 100 µA
Grade A 2.044 2.048 2.052 V
Grade B 2.046 2.048 2.050 V
INITIAL ACCURACY VOERR IIN = 100 µA
Grade A −4.096 +4.096 mV
±0.2 %
Grade B −2.048 +2.048 mV
±0.1 %
TEMPERATURE COEFFICIENT1 TCVOUT −40°C < TA < +125°C
Grade A 10 100 ppm/°C
Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. I
IN
∆V
R
I
IN
= 50 µA to 1 mA
−40°C < TA < +125°C 0.4 1.75 mV
IIN = 1 mA to 15 mA
−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 < T
A
< +125°C
60
µA
VOLTAGE NOISE eN IIN = 100 µA; 0.1 Hz to 10 Hz 2.8 µV rms
IIN = 100 µA; 10 Hz to 10 kHz 120 µV rms
TURN-ON SETTLING TIME tR CLOAD = 0 µF 28 µs
OUTPUT VOLTAGE HYSTERESIS ∆VOUT_HYS IIN = 1 mA 40 ppm
1 Guaranteed by design.
ADR5041 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 3.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE VOUT IIN = 100 µA
Grade A 2.495 2.500 2.505 V
Grade B 2.4975 2.500 2.5025 V
INITIAL ACCURACY VOERR IIN = 100 µA
Grade A −5 +5 mV
±0.2 %
Grade B −2.5 +2.5 mV
±0.1
%
TEMPERATURE COEFFICIENT1 TCVOUT –40°C < TA < +125°C
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 0.5 1.8 mV
I
IN
= 1 mA to 15 mA
−40°C < TA < +125°C 4 8 mV
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 4 of 16
Parameter Symbol Test Conditions/Comments 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 IIN = 100 µA; 0.1 Hz to 10 Hz 3.2 µV rms
IIN = 100 µA; 10 Hz to 10 kHz 150 µV rms
TURN-ON SETTLING TIME tR CLOAD = 0 µF 35 µs
OUTPUT VOLTAGE HYSTERESIS ∆VOUT_HYS IIN = 1 mA 40 ppm
1 Guaranteed by design.
ADR5043 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 4.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE VOUT IIN = 100 µA
Grade A 2.994 3.000 3.006 V
Grade B 2.997 3.000 3.003 V
INITIAL ACCURACY VOERR IIN = 100 µA
Grade A −6 +6 mV
±0.2 %
Grade B −3 +3 mV
±0.1
%
TEMPERATURE COEFFICIENT1 TCVOUT −40°C < TA < +125°C
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
IIN = 1 mA to 15 mA
−40°C < TA < +125°C 4 8 mV
DYNAMIC OUTPUT IMPEDANCE
(∆V
R
/∆I
R
)
I
IN
= 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 IIN = 100 µA; 0.1 Hz to 10 Hz 4.3 µV rms
IIN = 100 µA; 10 Hz to 10 kHz 180 µV rms
TURN-ON SETTLING TIME tR CLOAD = 0 µF 42 µs
OUTPUT VOLTAGE HYSTERESIS
∆V
OUT_HYS
I
IN
= 1 mA
40
ppm
1 Guaranteed by design.
ADR5044 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 5.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE
V
OUT
I
IN
= 100 µA
Grade A 4.088 4.096 4.104 V
Grade B 4.092 4.096 4.100 V
INITIAL ACCURACY
V
OERR
I
IN
= 100 µA
Grade A −8.192 +8.192 mV
±0.2 %
Grade B −4.096 +4.096 mV
±0.1 %
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 5 of 16
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
TEMPERATURE COEFFICIENT1 TCVOUT −40°C < TA < +125°C
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
IIN = 1 mA to 15 mA
−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
e
N
I
IN
= 100 µA; 0.1 Hz to 10 Hz
5.4
µV rms
IIN = 100 µA; 10 Hz to 10 kHz 240 µV rms
TURN-ON SETTLING TIME tR CLOAD = 0 µF 56 µs
OUTPUT VOLTAGE HYSTERESIS ∆VOUT_HYS IIN = 1 mA 40 ppm
1 Guaranteed by design.
ADR5045 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 6.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT VOLTAGE VOUT IIN = 100 µA
Grade A 4.990 5.000 5.010 V
Grade B 4.995 5.000 5.005 V
INITIAL ACCURACY VOERR IIN = 100 µA
Grade A −10 +10 mV
±0.2 %
Grade B −5 +5 mV
±0.1 %
TEMPERATURE COEFFICIENT1
TCV
OUT
−40°C < T
A
< +125°C
Grade A 10 100 ppm/°C
Grade B 10 75 ppm/°C
OUTPUT VOLTAGE CHANGE vs. I
IN
∆V
R
I
IN
= 50 µA to 1 mA
−40°C < TA < +125°C 0.8 4 mV
IIN = 1 mA to 15 mA
−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 IIN = 100 µA; 0.1 Hz to 10 Hz 6.6 µV rms
IIN = 100 µA; 10 Hz to 10 kHz 280 µV rms
TURN-ON SETTLING TIME tR CLOAD = 0 µF 70 µs
OUTPUT VOLTAGE HYSTERESIS ∆VOUT_HYS IIN = 1 mA 40 ppm
1 Guaranteed by design.
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 6 of 16
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 at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product 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 θJC Unit
3-Lead SC70 (KS) 580.5 177.4 °C/W
3-Lead SOT-23 (RT) 270 102 °C/W
ESD CAUTION
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 7 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, IIN = 100 μA, unless otherwise noted.
6
4
2
0
–2
–4
–6
–8
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V
OUT
CHANGE (mV)
I
R
= 150µA
06526-003
Figure 2. ADR5041 VOUT Change vs. Temperature
5
4
3
2
1
00 5 10 15 20
I
SHUNT
(mA)
REVERSE VOLTAGE CHANGE (mV)
–40°C
+125°C
+25°C
06526-004
Figure 3. ADR5041 Reverse Voltage Change vs. ISHUNT
VIN
VOUT
1V/DI
V
10µs/DIV
06526-007
Figure 4. ADR5041 Start-Up Characteristics
15
10
5
0
–5
–10
–15
–40–25–105 203550658095110125
TEMPERATURE (°C)
V
OUT
CHANGE (mV)
06526-005
I
R
= 150µA
Figure 5. ADR5045 VOUT Change vs. Temperature
8
6
4
2
0
–2
–4
–6
–8
0 5 10 15 20
ISHUNT (mA)
REVERSE VOLTAGE CHANGE (mV)
–40°C
+125°C
+25°C
06526-006
Figure 6. ADR5045 Reverse Voltage Change vs. ISHUNT
V
IN
V
OUT
2V/DI
V
40µs/DIV
06526-010
Figure 7. ADR5045 Start-Up Characteristics
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 8 of 16
ISHUNT = 100µA ± 25µA
RL = 100kΩ
10µs/DIV
VR AC-COUPLED VGEN (2V/DIV)
+25µA
–25µA
2mV/DIV
06526-008
Figure 8. ADR5041 Load Transient Response
I
SHUNT
= 1mA ± 250µA
R
L
= 10kΩ
10µs/DIV
V
R
AC-COUPLED V
GEN
+250µA
–250µA
10mV/DIV
06526-009
Figure 9. ADR5041 Transient Response
I
SHUNT
= 10mA ± 2.5mA
R
L
= 1kΩ
10µs/DIV
V
R
AC-COUPLED V
GEN
+2.5mA
–2.5mA
20mV/DIV
06526-013
Figure 10. ADR5041 Transient Response
I
SHUNT
= 100mA ± 25µA
R
L
= 100kΩ
40µs/DIV
V
R
AC-COUPLED V
GEN
(2V/DIV)
+25µA
–25µA
10mV/DIV
06526-011
Figure 11. ADR5045 Load Transient Response
I
SHUNT
= 1mA ± 250µA
R
L
= 10kΩ
10µs/DIV
V
R
AC-COUPLED V
GEN
+250µA
–250µA
10mV/DIV
06526-012
Figure 12. ADR5045 Transient Response
I
SHUNT
= 10mA ± 2.5mA
R
L
= 1kΩ
10µs/DIV
V
R
AC-COUPLED V
GEN
(2V/DIV)
+2.5mA
–2.5mA
20mV/DIV
06526-016
Figure 13. ADR5045 Transient Response
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 9 of 16
10k
0.1100 1k 10k 100k 1M
IMPEDANCE (Ω)
FREQUENCY (Hz)
1
10
100
1k C = 0µF
C = 1µF
06526-014
IIN = 150µA
IIN = 1mA
Figure 14. ADR5041 Output Impedance vs. Frequency
10k
1k 110 100 1k 10k
NOISE (nV/ Hz)
FREQUENCY (Hz)
06526-015
Figure 15. ADR5041 Voltage Noise Density
100
90
80
70
60
50
40
30
20
10
0012 3 4 5 6
REVERSE VOLTAGE (V)
REVERS E CURRE NT (µA)
2.048V 2.5V
3V 4.096V 5V
06526-002
Figure 16. ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Reverse
Characteristics and Minimum Operating Current
10k
0.1100 1k 10k 100k 1M
IMPEDANCE (Ω)
FREQUENCY (Hz)
1
10
100
1k
06526-017
C = 0µF
C = 1µF
IIN = 150µA
IIN = 1mA
Figure 17. ADR5045 Output Impedance vs. Frequency
10k
1k 110 100 1k 10k
FREQUENCY (Hz)
06526-018
NOISE (nV/ Hz)
Figure 18. ADR5045 Voltage Noise Density
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 10 of 16
TERMINOLOGY
Temperature Coefficient
The change in output voltage with respect to operating temperature
changes. It is normalized by an output voltage of 25°C. This
parameter is expressed in ppm/°C and is determined by the
following equation:
( ) ( )
( )
( )
6
10
C25C
ppm ×
−
×°
−
=
°
1
2
UT
O
1
OUT
2
OUT
OUT
TTV
T
V
TV
TCV
(1)
where:
VOUT(25°C) = VOUT at 25°C.
VOUT(T1) = VOUT at Temperature 1.
VOUT(T2) = VOUT at Temperature 2.
Thermal Hysteresis
The change in output voltage after the device is cycled through
temperatures ranging from +25°C to −40°C, then to +125°C, and
back to +25°C. This is common in precision reference and is
caused by thermal-mechanical package stress. Changes in envi-
ronmental 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:
( )
[ ]
( )
( )
6
_
_
_
_
10
C
25
C25
ppm
C
25
×
°
−°
=
−
°=
OUT
TC
OUTOUT
HYSOUT
TCOUT
OUT
HYSOUT
V
V
V
V
V
V
V
(2)
where:
VOUT(25°C) = VOUT at 25°C.
VOUT_TC = VOUT at 25°C after a temperature cycle from +25°C to
−40°C, then to +125°C, and back to +25°C.
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 11 of 16
THEORY OF OPERATION
The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 use
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 VBE approaches approximately the silicon band gap voltage.
Therefore, if a voltage develops with an opposing temperature
coefficient to sum the VBE, a zero 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
external bias resistor (RBIAS) between the supply voltage and the
reference (see Figure 19). The RBIAS sets the current that flows
through the load (IL) and the reference (IIN). Because the load
and the supply voltage can vary, the RBIAS needs to be chosen
based on the following considerations:
RBIAS must be small enough to supply the minimum IIN current
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.
RBIAS must be large enough so that IIN does not exceed 15 mA
when the supply voltage is at its maximum value and the
load current is at its minimum value.
Given these conditions, RBIAS is determined by the supply
voltage (VS), the ADR5040/ADR5041/ADR5043/ADR5044/
ADR5045 load and operating current (IL and IIN), and the
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 output
voltage (VOUT).
INL
OUT
S
BIAS II
VV
R
(3)
IIN + IL
RBIAS
V
S
VOUT
IL
IIN
ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045
06526-019
Figure 19. Shunt Reference
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
output. Exercise caution in using a low temperature sensitive
resistor to avoid errors from the resistor.
R
BIAS
V
OUT
ADR5045
–5V
06526-020
V
CC
Figure 20. Negative Precision Reference Configuration
Stacking the ADR5040/ADR5041/ADR5043/ADR5044/
ADR5045 for User-Definable Outputs
Multiple ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
devices can be stacked together to allow the user to obtain a
desired higher voltage. Figure 21a shows three ADR5045 devices
configured to give 15 V. The bias resistor, RBIAS, is chosen using
Equation 3, noting that the same bias current flows through all the
shunt references in series. Figure 21b shows three ADR5045
devices stacked together to give −15 V. RBIAS is 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.
R
BIAS
–15V
ADR5045
ADR5045
ADR5045
–V
DD
R
BIAS
+15V
A
DR5045
A
DR5045
A
DR5045
V
DD
(a) (b)
06526-021
Figure 21. ±15 V Output with Stacked ADR5045 Devices
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 12 of 16
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
using the ADR5040/ADR5041/ADR5043/ADR5044/ADR5045.
The output of the op amp, VOUT, is determined by the gain of the
circuit, which is completely dependent on the resistors, R1 and R2.
VOUT = (1 + R2/R1)VREF
An additional capacitor, C1, in parallel with R2, can be added to
filter out high frequency noise. The value of C1 is dependent on
the value of R2.
AD8610
R
BIAS
V
REF
GND
R1
R2
C1
(OPTIONAL)
V
OUT
= V
REF
(1 + R2/ R1)
ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045
V
CC
06526-022
Figure 22. Adjustable Voltage Source
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.
The constant voltage on the gate of the transistor sets the current
through the load. Varying the voltage on the gate changes the
current. The AD5247 is a digital potentiometer with I2C® digital
interface, and the AD8601 is a precision rail-to-rail input op
amp. Each incremental step of the digital potentiometer increases
or decreases the voltage at the noninverting input of the op amp.
Therefore, this voltage varies with respect to the reference
voltage.
06526-023
I
LOAD
AD8601
V+
V–
AD5247
ADR5040/
ADR5041/
ADR5043/
ADR5044/
ADR5045
R
SENSE
R
BIAS
V
DD
Figure 23. Programmable Current Source
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 13 of 16
OUTLINE DIMENSIONS
ALL DIMENSIONS COMPLIANT WITH EIAJ SC70
072809-A
0.40
0.25
0.10 MAX
1.00
0.80 1.10
0.80
0.40
0.10
0.26
0.10
0.30
0.20
0.10
2
1
3
0.65 BSC
2.20
2.00
1.80
2.40
2.10
1.80
1.35
1.25
1.15
COPLANARITY
0.10
SEATING
PLANE
Figure 24. 3-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-3)
Dimensions shown in millimeters
3.04
2.90
2.80
COMPLIANT TO JE DE C S TANDARDS TO-236-AB
011909-C
12
3
SEATING
PLANE
2.64
2.10
1.40
1.30
1.20
2.05
1.78
0.100
0.013
1.03
0.89
0.60
0.45
0.51
0.37
1.12
0.89 0.180
0.085
0.25
0.54
REF
GAUGE
PLANE
0.60 M AX
0.30 M IN
1.02
0.95
0.88
Figure 25. 3-Lead Small Outline Transistor Package [SOT-23-3]
(RT-3)
Dimensions shown in millimeters
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 14 of 16
ORDERING GUIDE
Model1, 2
Output
Voltage (V)
Initial
Accuracy
(mV)
Tempco
Industrial
(ppm/°C)
Temperature
Range
Package
Description
Package
Option
Ordering
Quantity Branding
ADR5040AKSZ-R2 2.048 4.096 100 −40°C to +125°C 3-Lead SC70 KS-3 250 R2J
ADR5040AKSZ-REEL 2.048 4.096 100 −40°C to +125°C 3-Lead SC70 KS-3 10,000 R2J
ADR5040AKSZ-REEL7 2.048 4.096 100 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2J
ADR5040ARTZ-R2
2.048
4.096
100
−40°C to +125°C
3-Lead SOT-23-3
RT-3
250
R2J
ADR5040ARTZ-REEL 2.048 4.096 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2J
ADR5040ARTZ-REEL7 2.048 4.096 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2J
ADR5040BKSZ-R2 2.048 2.048 75 −40°C to +125°C 3-Lead SC70 KS-3 250 R2L
ADR5040BKSZ-REEL7 2.048 2.048 75 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2L
ADR5040BRTZ-R2 2.048 2.048 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2L
ADR5040BRTZ-REEL7 2.048 2.048 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2L
ADR5041AKSZ-R2 2.500 5 100 −40°C to +125°C 3-Lead SC70 KS-3 250 R2N
ADR5041AKSZ-REEL 2.500 5 100 −40°C to +125°C 3-Lead SC70 KS-3 10,000 R2N
ADR5041AKSZ-REEL7 2.500 5 100 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2N
ADR5041ARTZ-R2 2.500 5 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2N
ADR5041ARTZ-REEL 2.500 5 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2N
ADR5041ARTZ-REEL7 2.500 5 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2N
ADR5041BKSZ-R2 2.500 2.5 75 −40°C to +125°C 3-Lead SC70 KS-3 250 R2Q
ADR5041BKSZ-REEL7
2.500
2.5
75
−40°C to +125°C
3-Lead SC70
KS-3
3,000
R2Q
ADR5041BRTZ-R2 2.500 2.5 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2Q
ADR5041BRTZ-REEL7 2.500 2.5 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Q
ADR5041WARTZ-R7 2500 5 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2N
ADR5041WBRTZ-R7 2.500 2.5 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Q
ADR5043AKSZ-R2 3.0 6 100 −40°C to +125°C 3-Lead SC70 KS-3 250 R2S
ADR5043AKSZ-REEL 3.0 6 100 −40°C to +125°C 3-Lead SC70 KS-3 10,000 R2S
ADR5043AKSZ-REEL7 3.0 6 100 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2S
ADR5043ARTZ-R2 3.0 6 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2S
ADR5043ARTZ-REEL 3.0 6 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2S
ADR5043ARTZ-REEL7 3.0 6 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2S
ADR5043BKSZ-R2 3.0 3 75 −40°C to +125°C 3-Lead SC70 KS-3 250 R2U
ADR5043BKSZ-REEL7 3.0 3 75 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2U
ADR5043BRTZ-R2 3.0 3 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2U
ADR5043BRTZ-REEL7
3.0
3
75
−40°C to +125°C
3-Lead SOT-23-3
RT-3
3,000
R2U
ADR5044AKSZ-R2 4.096 8.192 100 −40°C to +125°C 3-Lead SC70 KS-3 250 R2W
ADR5044AKSZ-REEL 4.096 8.192 100 −40°C to +125°C 3-Lead SC70 KS-3 10,000 R2W
ADR5044AKSZ-REEL7 4.096 8.192 100 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R2W
ADR5044ARTZ-R2 4.096 8.192 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2W
ADR5044ARTZ-REEL 4.096 8.192 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R2W
ADR5044ARTZ-REEL7 4.096 8.192 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2W
ADR5044BKSZ-R2 4.096 4.096 75 −40°C to +125°C 3-Lead SC70 KS-3 250 R2Y
ADR5044BKSZ-REEL7
4.096
4.096
75
−40°C to +125°C
3-Lead SC70
KS-3
3,000
R2Y
ADR5044BRTZ-R2 4.096 4.096 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R2Y
ADR5044BRTZ-REEL7 4.096 4.096 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Y
ADR5044WARTZ-R7 4.096 8.192 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2W
ADR5044WBRTZ-R7 4.096 4.096 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R2Y
Data Sheet ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Rev. C | Page 15 of 16
Model1, 2
Output
Voltage (V)
Initial
Accuracy
(mV)
Tempco
Industrial
(ppm/°C)
Temperature
Range
Package
Description
Package
Option
Ordering
Quantity Branding
ADR5045AKSZ-R2 5.0 10 100 −40°C to +125°C 3-Lead SC70 KS-3 250 R30
ADR5045AKSZ-REEL
5.0
10
100
−40°C to +125°C
3-Lead SC70
KS-3
10,000
R30
ADR5045AKSZ-REEL7 5.0 10 100 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R30
ADR5045ARTZ-R2 5.0 10 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R30
ADR5045ARTZ-REEL 5.0 10 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 10,000 R30
ADR5045ARTZ-REEL7 5.0 10 100 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R30
ADR5045BKSZ-R2
5.0
5
75
−40°C to +125°C
3-Lead SC70
KS-3
250
R32
ADR5045BKSZ-REEL7 5.0 5 75 −40°C to +125°C 3-Lead SC70 KS-3 3,000 R32
ADR5045BRTZ-R2 5.0 5 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 250 R32
ADR5045BRTZ-REEL7 5.0 5 75 −40°C to +125°C 3-Lead SOT-23-3 RT-3 3,000 R32
1 Z = RoHS Compliant Part.
2 W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The ADR5041W and ADR5044W models are available with controlled manufacturing to support the quality and reliability requirements
of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore,
designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for
use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and
to obtain the specific Automotive Reliability reports for these models.
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 Data Sheet
Rev. C | Page 16 of 16
NOTES
I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors).
©2007–2016 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06526-0-3/16(C)
