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ADR291ERZ-REEL7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
Low Noise Micropower 2.5 V and
4.096 V Precision Voltage References
ADR291/ADR292
Rev. F
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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.
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Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Supply range
2.8 V to 15 V, ADR291
4.4 V to 15 V, ADR292
Supply current: 15 μA maximum
Low noise: 8 μV and 12 μV p-p (0.1 Hz to 10 Hz)
High output current: 5 mA
Temperature range: −40°C to +125°C
Pin-compatible with REF02/REF19x
APPLICATIONS
Portable instrumentation
Precision reference for 3 V and 5 V systems
Analog-to-digital and digital-to-analog converter reference
Solar-powered applications
Loop-current-powered instruments
CONNECTION DIAGRAMS
NC 1
V
IN
2
NC 3
GND
4
NC8
NC7
V
OUT
6
NC
5
NC = NO CONNECT
ADR291/
ADR292
TOP VIEW
(Not to Scale)
00163-001
Figure 1. 8-Lead SOIC (R-8)
1
2
3
4
V
IN
NC
GND
NC
8
7
6
5
NC
V
OUT
NC
NC
NC = NO CONNECT
00163-002
ADR291/
ADR292
TOP VIEW
(Not to Scale)
Figure 2. 8-Lead TSSOP (RU-8)
321
V
OUT
GND
V
IN
TOP VIEW
(Not to Scale)
ADR291
00163-003
Figure 3. 3-Lead TO-92 (T-3)
GENERAL DESCRIPTION
The ADR291 and ADR292 are low noise, micropower precision
voltage references that use an XFET® reference circuit. The new
XFET architecture offers significant performance improvements
over traditional band gap and buried Zener-based references.
Improvements include one quarter the voltage noise output of
band gap references operating at the same current, very low and
ultralinear temperature drift, low thermal hysteresis, and
excellent long-term stability.
The ADR291/ADR292 family is a series of voltage references
providing stable and accurate output voltages from supplies as
low as 2.8 V for the ADR291. Output voltage options are 2.5 V
and 4.096 V for the ADR291 and ADR292, respectively.
Quiescent current is only 12 μA, making these devices ideal for
battery-powered instrumentation. Three electrical grades are
available offering initial output accuracies of ±2 mV, ±3 mV,
and ±6 mV maximum for the ADR291, and ±3 mV, ±4 mV,
and ±6 mV maximum for the ADR292. Temperature
coefficients for the three grades are 8 ppm/°C, 15 ppm/°C, and
25 ppm/°C maximum, respectively. Line regulation and load
regulation are typically 30 ppm/V and 30 ppm/mA, maintaining
the reference’s overall high performance. For a device with 5.0 V
output, refer to the ADR293 data sheet.
The ADR291 and ADR292 references are specified over the
extended industrial temperature range of −40°C to +125°C.
Devices are available in the 8-lead SOIC, 8-lead TSSOP, and
3-lead TO-92 packages.
Table 1. ADR291/ADR292 Product
Part No.
Output
Voltage (V)
Initial
Accuracy (±%)
Temperature
Coefficient
(ppm/°C) Max
ADR291 2.500 0.08, 0.12, 0.24 8, 15, 25
ADR292 4.096 0.07, 0.10, 0.15 8, 15, 25
ADR291/ADR292
Rev. F | Page 2 of 20
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Connection Diagrams ...................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
ADR291 Electrical Specifications ............................................... 3
ADR292 Electrical Specifications ............................................... 4
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 12
Theory of Operation ...................................................................... 13
Device Power Dissipation Considerations .............................. 13
Basic Voltage Reference Connections ..................................... 13
Noise Performance ..................................................................... 13
Turn-On Time ............................................................................ 13
Applications Information .............................................................. 14
High Voltage Floating Current Source .................................... 14
Kelvin Connections .................................................................... 14
Low Power, Low Voltage Reference for Data Converters ..... 14
Voltage Regulator for Portable Equipment ............................. 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 17
REVISION HISTORY
5/11—Rev. E to Rev. F
Deleted Negative Precision Reference Without Precision
Resistors Section ............................................................................. 14
Deleted Figure 33 and Figure 34, Renumbered Sequentially ... 14
Changes to Ordering Guide .......................................................... 17
12/07—Rev. D to Rev. E
Changes to Features .......................................................................... 1
Changes to Figure 34 ...................................................................... 14
3/06—Rev. C to Rev. D
Updated Format .................................................................. Universal
Change to Table 8 ............................................................................. 6
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 16
9/03—Rev. B to Rev. C
Deleted ADR290 ................................................................. Universal
Changes to Specifications ................................................................. 2
Changes to Ordering Guide ............................................................. 4
Updated Outline Dimensions ....................................................... 13
ADR291/ADR292
Rev. F | Page 3 of 20
SPECIFICATIONS
ADR291 ELECTRICAL SPECIFICATIONS
V
S
= 3.0 V to 15 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
E GRADE
Output Voltage V
OUT
I
OUT
= 0 mA 2.498 2.500 2.502 V
Initial Accuracy V
OERR
–2 +2 mV
–0.08 +0.08 %
F GRADE
Output Voltage V
OUT
I
OUT
= 0 mA 2.497 2.500 2.503 V
Initial Accuracy V
OERR
–3 +3 mV
–0.12 +0.12 %
G GRADE
Output Voltage V
OUT
I
OUT
= 0 mA 2.494 2.500 2.506 V
Initial Accuracy V
OERR
–6 +6 mV
–0.24 +0.24 %
LINE REGULATION
E/F Grades ∆V
OUT
/∆V
IN
I
OUT
= 0 mA 30 100 ppm/V
G Grade 40 125 ppm/V
LOAD REGULATION
E/F Grades ∆V
OUT
/∆I
LOAD
V
S
= 5.0 V, I
OUT
= 0 mA to 5 mA 30 100 ppm/mA
G Grade 40 125 ppm/mA
LONG-TERM STABILITY ∆V
OUT
After 1000 hours of operation @ 125°C 50 ppm
NOISE VOLTAGE e
N
0.1 Hz to 10 Hz 8 μV p-p
WIDEBAND NOISE DENSITY e
N
@ 1 kHz 480 nV/√Hz
V
S
= 3.0 V to 15 V, T
A
= −25°C to +85°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
TEMPERATURE COEFFICIENT
E Grade TCV
OUT
I
OUT
= 0 mA 3 8 ppm/°C
F Grade 5 15 ppm/°C
G Grade 10 25 ppm/°C
LINE REGULATION
E/F Grades ∆V
OUT
/∆V
IN
I
OUT
= 0 mA 35 125 ppm/V
G Grade 50 150 ppm/V
LOAD REGULATION
E/F Grades ∆V
OUT
/∆I
LOAD
V
S
= 5.0 V, I
OUT
= 0 mA to 5 mA 20 125 ppm/mA
G Grade 30 150 ppm/mA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

ADR291ERZ-REEL7

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Manufacturer:
Analog Devices Inc.
Description:
Voltage References 2.5V Micropower Low Noise Prec
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