Data Sheet
FEATURES
Ultralow Noise XFET Voltage References
with Current Sink and Source Capability
ADR430/ADR431/ADR433/ADR434/ADR435
PIN CONFIGURATIONS
ADR430/ADR431
ADR433/ADR434
ADR435
DNC
1
V
IN 2
NIC
3
GND
4
TOP VIEW
(Not to Scale)
8
7
6
5
Low noise (0.1 Hz to 10.0 Hz): 3.5 µV p-p at 2.500 V output
No external capacitor required
Low temperature coefficient
A grade: 10 ppm/°C maximum
B grade: 3 ppm/°C maximum
Load regulation: 15 ppm/mA
Line regulation: 20 ppm/V
Wide operating range
ADR430:
4.1 V to 18 V
ADR431:
4.5 V to 18 V
ADR433:
5.0 V to 18 V
ADR434:
6.1 V to 18 V
ADR435:
7.0 V to 18 V
High output source and sink current: 30 mA and −20 mA
Wide temperature range: −40°C to +125°C
DNC
COMP
V
OUT
TRIM
NOTES
1. NIC = NOT INTERNALLY CONNECTED.
THIS PIN IS NOT CONNECTED INTERNALLY.
2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 1. 8-Lead MSOP (RM-8)
ADR430/ADR431
ADR433/ADR434
ADR435
DNC
1
8
DNC
APPLICATIONS
Precision data acquisition systems
High resolution data converters
Medical instruments
Industrial process control systems
Optical control circuits
Precision instruments
7
COMP
TOP VIEW
6
V
OUT
(Not to Scale)
5
TRIM
GND
4
V
IN 2
NIC
3
NOTES
1. NIC = NOT INTERNALLY CONNECTED.
THIS PIN IS NOT CONNECTED INTERNALLY.
2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 2. 8-Lead SOIC_N (R-8)
GENERAL DESCRIPTION
The
ADR430/ADR431/ADR433/ADR434/ADR435
1
series is a
family of XFET® voltage references featuring low noise, high
accuracy, and low temperature drift performance. Using Analog
Devices, Inc., temperature drift curvature correction and extra
implanted junction FET (XFET) technology, voltage change vs.
temperature nonlinearity in the
ADR430/ADR431/ADR433/
ADR434/ADR435
is minimized.
The XFET references operate at lower current (800 µA) and
lower supply voltage headroom (2 V) than buried Zener
references. Buried Zener references require more than 5 V of
headroom for operation. The
ADR430/ADR431/ADR433/
ADR434/ADR435
XFET references are low noise solutions for
5 V systems.
The
ADR430/ADR431/ADR433/ADR434/ADR435
family has
the capability to source up to 30 mA of output current and sink
up to −20 mA. It also comes with a trim terminal to adjust the
output voltage over a ±0.5% range without compromising
performance.
1
The
ADR430/ADR431/ADR433/ADR434/ADR435
are
available in 8-lead MSOP and 8-lead narrow SOIC packages. All
versions are specified over the extended industrial temperature
range of −40°C to +125°C.
Table 1. Selection Guide
Model
ADR430A
ADR430B
ADR431A
ADR431B
ADR433A
ADR433B
ADR434A
ADR434B
ADR435A
ADR435B
Output
Voltage (V)
2.048
2.048
2.500
2.500
3.000
3.000
4.096
4.096
5.000
5.000
Initial Accuracy
(mV)
±3
±1
±3
±1
±4
±1.5
±5
±1.5
±6
±2
Temperature
Coefficient
(ppm/°C)
10
3
10
3
10
3
10
3
10
3
Protected by U.S. Patent Number 5,838,192.
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Rev. N
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ADR430/ADR431/ADR433/ADR434/ADR435
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 4
ADR430 Electrical Characteristics............................................. 4
ADR431 Electrical Characteristics............................................. 5
ADR433 Electrical Characteristics............................................. 6
ADR434 Electrical Characteristics............................................. 7
ADR435 Electrical Characteristics............................................. 8
Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution .................................................................................. 9
Pin Configurations and Function Descriptions ......................... 10
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 16
Basic Voltage Reference Connections ...................................... 16
Data Sheet
Noise Performance ..................................................................... 16
High Frequency Noise ............................................................... 16
Turn-On Settling Time .............................................................. 17
Applications Information .............................................................. 18
Output Adjustment .................................................................... 18
Reference for Converters in Optical Network Control
Circuits......................................................................................... 18
High Voltage Floating Current Source .................................... 18
Kelvin Connection ..................................................................... 18
Dual Polarity References ........................................................... 19
Programmable Current Source ................................................ 19
Programmable DAC Reference Voltage .................................. 20
Precision Voltage Reference for Data Converters .................. 20
Precision Boosted Output Regulator ....................................... 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 23
REVISION HISTORY
2/2018—Rev. M to Rev. N
Changed V
O
to V
OUT
and ADR43x to ADR430/ADR431/
ADR433/ADR434/ADR435 ......................................... Throughout
Changes to Figure 1, Figure 2, and General Description
Section ................................................................................................ 1
Changes to Output Current Capacity Parameter and Trim
Range Parameter, Table 2................................................................. 4
Changes to Output Current Capacity Parameter and Trim
Range Parameter, Table 3................................................................. 5
Changes to Output Current Capacity Parameter and Trim
Range Parameter, Table 4................................................................. 6
Changes to Output Current Capacity Parameter and Trim
Range Parameter, Table 5................................................................. 7
Changes to Output Current Capacity Parameter and Trim
Range Parameter, Table 6................................................................. 8
Added Pin Configuration and Function Descriptions Section,
Figure 3, Figure 4, and Table 9; Renumbered Sequentially ....... 10
Changes to Figure 14 and Figure 16 ............................................. 12
Changes to Figure 19 Caption and Figure 21 Caption .............. 13
Changes to Theory of Operation Section, Figure 32, Noise
Performance Section, and High Frequency Noise Section ....... 16
Changes to Figure 33 Caption, Figure 34, and Turn-On Settling
Time Section.................................................................................... 17
Changes to Reference for Converters in Optical Network
Control Circuits Section and Programmable Current Source
Section .............................................................................................. 19
Changes to Table 10 and Precision Boosted Output Regulator
Section.............................................................................................. 20
Changes to Precision Boosted Output Regulator Section......... 21
6/2015—Rev. L to Rev. M
Changes to Ordering Guide .......................................................... 22
7/2014—Rev. K to Rev. L
Changes to Default Conditions, Typical Performance
Characteristics Section .................................................................. 10
Changes to Ordering Guide .......................................................... 22
5/2014—Rev. J to Rev. K
Deleted ADR439 (Throughout) ......................................................1
Changes to Features Section and Table 1 .......................................1
Deleted Table 7; Renumbered Sequentially ...................................9
Changes to Ordering Guide .......................................................... 22
7/2011—Rev. I to Rev. J
Changes to Figure 1 and Figure 2 ....................................................1
Changes to Ordering Guide .......................................................... 23
5/2011—Rev. H to Rev. I
Added Endnote 1 in Table 2 .............................................................4
Added Endnote 1 in Table 3 .............................................................5
Added Endnote 1 in Table 4 .............................................................6
Rev. N | Page 2 of 23
Data Sheet
Added Endnote 1 in Table 5............................................................. 7
Added Endnote 1 in Table 6............................................................. 8
Added Endnote 1 in Table 7............................................................. 9
Deleted Negative Precision Reference Without Precision
Resistors Section ..............................................................................17
Deleted Figure 36; Renumbered Sequentially .............................18
2/2011—Rev. G to Rev. H
Updated Outline Dimensions ........................................................21
Changes to Ordering Guide ...........................................................22
7/2010—Rev. F to Rev. G
Changes to Storage Temperature Range in Table 9....................... 9
6/2010—Rev. E to Rev. F
Updated Pin Name NC to COMP Throughout ............................ 1
Changes to Figure 1 and Figure 2.................................................... 1
Changes to Figure 30 and High Frequency Noise Section ........15
Updated Outline Dimensions ........................................................21
Changes to Ordering Guide ...........................................................22
1/2009—Rev. D to Rev. E
Added High Frequency Noise Section and Equation 3;
Renumbered Sequentially ..............................................................15
Inserted Figure 31, Figure 32, and Figure 33; Renumbered
Sequentially ......................................................................................16
Changes to the Ordering Guide ....................................................22
12/2007—Rev. C to Rev. D
ADR430/ADR431/ADR433/ADR434/ADR435
Changes to Initial Accuracy and Ripple Rejection Ratio
Parameters in Table 2 through Table 7 ........................................... 3
Changes to Table 9 ............................................................................ 9
Changes to Theory of Operation Section .................................... 15
Updated Outline Dimensions........................................................ 20
8/2006—Rev. B to Rev. C
Updated Format ................................................................. Universal
Changes to Table 1 ............................................................................ 1
Changes to Table 3 ............................................................................ 4
Changes to Table 4 ............................................................................ 5
Changes to Table 7 ............................................................................ 8
Changes to Figure 26 ...................................................................... 14
Changes to Figure 31 ...................................................................... 16
Updated Outline Dimensions........................................................ 20
Changes to Ordering Guide ........................................................... 21
9/2004—Rev. A to Rev. B
Added New Grade .............................................................. Universal
Changes to Specifications ................................................................ 3
Replaced Figure 3, Figure 4, Figure 5 ........................................... 10
Updated Ordering Guide ............................................................... 21
6/2004—Rev. 0 to Rev. A
Changes to Format ............................................................. Universal
Changes to the Ordering Guide .................................................... 20
12/2003—Revision 0: Initial Version
Rev. N | Page 3 of 23
ADR430/ADR431/ADR433/ADR434/ADR435
SPECIFICATIONS
ADR430
ELECTRICAL CHARACTERISTICS
V
IN
= 4.1 V to 18 V, I
L
= 0 mA, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
OUTPUT VOLTAGE
A Grade
B Grade
INITIAL ACCURACY
1
A Grade
B Grade
TEMPERATURE COEFFICIENT
A Grade
B Grade
LINE REGULATION
LOAD REGULATION
OUTPUT CURRENT CAPACITY
Sourcing
Sinking
QUIESCENT CURRENT
VOLTAGE NOISE
VOLTAGE NOISE DENSITY
TURN-ON SETTLING TIME
LONG-TERM STABILITY
2
OUTPUT VOLTAGE HYSTERESIS
RIPPLE REJECTION RATIO
SHORT CIRCUIT TO GND
SUPPLY VOLTAGE
OPERATING RANGE
SUPPLY VOLTAGE HEADROOM
TRIM RANGE
1
2
Data Sheet
Symbol
V
OUT
Test Conditions/Comments
Min
2.045
2.047
Typ
2.048
2.048
Max
2.051
2.049
±3
±0.15
±1
±0.05
Unit
V
V
mV
%
mV
%
ppm/°C
ppm/°C
ppm/V
ppm/mA
ppm/mA
mA
mA
µA
µV p-p
nV/√Hz
µs
ppm
ppm
dB
mA
V
V
%
V
OERR
TCV
OUT
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
V
IN
= 4.1 V to 18 V, −40°C < T
A
< +125°C
I
L
= 0 mA to 10 mA, V
IN
= 5.0 V, −40°C < T
A
< +125°C
I
L
= −10 mA to 0 mA, V
IN
= 5.0 V, −40°C < T
A
< +125°C
2
1
5
10
3
20
15
15
∆V
OUT
/∆V
IN
∆V
OUT
/∆I
L
I
L
I
IN
e
N
p-p
e
N
t
R
∆V
OUT
V
OUT_HYS
RRR
I
SC
V
IN
V
IN
− V
OUT
No load, −40°C < T
A
< +125°C
0.1 Hz to 10.0 Hz
1 kHz
C
L
= 0 µF
1000 hours
f
IN
= 1 kHz
4.1
2
−5
30
−20
560
3.5
60
10
40
20
–70
40
800
18
+5
Initial accuracy does not include shift due to solder heat effect.
The long-term stability specification is noncumulative. The drift in subsequent 1000 hour periods is significantly lower than in the first 1000 hour period.
Rev. N | Page 4 of 23
Data Sheet
ADR431
ELECTRICAL CHARACTERISTICS
V
IN
= 4.5 V to 18 V, I
L
= 0 mA, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
OUTPUT VOLTAGE
A Grade
B Grade
INITIAL ACCURACY
1
A Grade
B Grade
TEMPERATURE COEFFICIENT
A Grade
B Grade
LINE REGULATION
LOAD REGULATION
OUTPUT CURRENT CAPACITY
Sourcing
Sinking
QUIESCENT CURRENT
VOLTAGE NOISE
VOLTAGE NOISE DENSITY
TURN-ON SETTLING TIME
LONG-TERM STABILITY
2
OUTPUT VOLTAGE HYSTERESIS
RIPPLE REJECTION RATIO
SHORT CIRCUIT TO GND
SUPPLY VOLTAGE
OPERATING RANGE
SUPPLY VOLTAGE HEADROOM
TRIM RANGE
1
2
ADR430/ADR431/ADR433/ADR434/ADR435
Symbol
V
OUT
Test Conditions/Comments
Min
2.497
2.499
Typ
2.500
2.500
Max
2.503
2.501
±3
±0.12
±1
±0.04
Unit
V
V
mV
%
mV
%
ppm/°C
ppm/°C
ppm/V
ppm/mA
ppm/mA
mA
mA
µA
µV p-p
nV/√Hz
µs
ppm
ppm
dB
mA
V
V
%
V
OERR
TCV
OUT
−40°C < T
A
< +125°C
−40°C < T
A
< +125°C
V
IN
= 4.5 V to 18 V, −40°C < T
A
< +125°C
I
L
= 0 mA to 10 mA, V
IN
= 5.0 V, −40°C < T
A
< +125°C
I
L
= −10 mA to 0 mA, V
IN
= 5.0 V, −40°C < T
A
< +125°C
2
1
5
10
3
20
15
15
∆V
OUT
/∆V
IN
∆V
OUT
/∆I
L
I
L
I
IN
e
N
p-p
e
N
t
R
∆V
OUT
V
OUT_HYS
RRR
I
SC
V
IN
V
IN
− V
OUT
No load, −40°C < T
A
< +125°C
0.1 Hz to 10.0 Hz
1 kHz
C
L
= 0 µF
1000 hours
f
IN
= 1 kHz
4.5
2
−5
30
−20
580
3.5
80
10
40
20
−70
40
800
18
+5
Initial accuracy does not include shift due to solder heat effect.
The long-term stability specification is noncumulative. The drift in subsequent 1000 hour periods is significantly lower than in the first 1000 hour period.
Rev. N | Page 5 of 23
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