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Low Noise, Micropower
5.0 V Precision Voltage Reference
ADR293
FEATURES
6.0 V to 15 V supply range
Supply current: 15 μA maximum
Low noise: 15 μV p-p typical (0.1 Hz to 10 Hz)
High output current: 5 mA
Temperature range: −40°C to +125°C
Pin-compatible with the REF02/REF19x
PIN CONFIGURATIONS
NC
1
V
IN 2
8
NC
NC = NO CONNECT
Figure 1. 8-Lead Narrow Body SOIC (R-8)
APPLICATIONS
Portable instrumentation
Precision reference for 5 V systems
ADC and DAC reference
Solar-powered applications
Loop-current powered instruments
NC
V
IN
NC
GND
1
2
3
4
8
NC
NC
V
OUT
00164-002
ADR293
TOP VIEW
(Not to Scale)
7
6
5
NC
NC = NO CONNECT
Figure 2. 8-Lead TSSOP (RU-8)
GENERAL DESCRIPTION
The ADR293 is a low noise, micropower precision voltage
reference that utilizes an XFET® (eXtra implanted junction FET)
reference circuit. The 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 ADR293 is a series voltage reference providing stable and
accurate output voltage from a 6.0 V supply. Quiescent current
is only 15 μA maximum, making this device ideal for battery
powered instrumentation. Three electrical grades are available
offering initial output accuracy of ±3 mV, ±6 mV, and ±10 mV.
Temperature coefficients for the three grades are 8 ppm/°C,
15 ppm/°C, and 25 ppm/°C maximum. Line regulation and load
regulation are typically 30 ppm/V and 30 ppm/mA, respectively,
maintaining the reference’s overall high performance.
The ADR293 is specified over the extended industrial
temperature range of –40°C to +125°C. This device is available
in the 8-lead SOIC and 8-lead TSSOP packages.
Table 1. ADR29x Products
Output
Voltage (V)
2.500
4.096
5.000
Initial
Accuracy (%)
0.08, 0.12, 0.24
0.07, 0.10, 0.15
0.06, 0.12, 0.20
Temperature
Coefficient
(ppm/°C max)
8, 15, 25
8, 15, 25
8, 15, 25
Device
ADR291
ADR292
ADR293
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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.
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: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2001-2011 Analog Devices, Inc. All rights reserved.
00164-001
7
NC
TOP VIEW
6
V
OUT
(Not to Scale)
5
NC
GND
4
ADR293
NC
3
ADR293
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Specifications ............................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Terminology .......................................................................................9
Theory of Operation ...................................................................... 10
Device Power Dissipation Considerations .............................. 10
Basic Voltage Reference Connections ..................................... 10
Noise Performance ..................................................................... 10
Turn-On Time ............................................................................ 10
Applications..................................................................................... 11
Kelvin Connections .................................................................... 11
Voltage Regulator for Portable Equipment ............................. 11
Outline Dimensions ....................................................................... 12
Ordering Guide .......................................................................... 12
REVISION HISTORY
5/11—Rev. C to Rev. D
Delete Negative Precision Reference Without Precision
Resistors Section ............................................................................. 11
Delete Figure 23 and Figure 24, Renumbered Sequentially ...... 11
9/10—Rev. B to Rev. C
Changes to Table 2 and Table 3 ....................................................... 3
Changes to Table 4 ............................................................................ 4
Changes to Figure 10, Figure 11, Figure 13 ................................... 7
Changes to Captions for Figure 17 to Figure 19 ........................... 8
6/07—Rev. A to Rev. B
Updated Format .................................................................. Universal
Changes to Table 1.............................................................................1
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
3/01—Rev. 0 to Rev. A
Rev. D | Page 2 of 12
ADR293
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
V
S
= 6.0 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
OUTPUT VOLTAGE
E Grade
F Grade
G Grade
INITIAL ACCURACY
E Grade
F Grade
G Grade
LINE REGULATION
E, F Grades
G Grade
LOAD REGULATION
E, F Grades
G Grade
LONG-TERM STABILITY
VOLTAGE NOISE
VOLTAGE NOISE DENSITY
ΔV
OUT
/ΔV
IN
6.0 V to 15 V, I
OUT
= 0 mA
30
40
ΔV
OUT
/ΔI
LOAD
V
S
= 6.0 V, I
OUT
= 0 mA to 5 mA
30
40
50
15
640
100
150
ppm/mA
ppm/mA
ppm
μV p-p
nV/√Hz
100
150
ppm/V
ppm/V
Symbol
V
OUT
Conditions
I
OUT
= 0 mA
Min
4.997
4.994
4.990
I
OUT
= 0 mA
–3
–6
–10
+3
0.06
+6
0.12
+10
0.20
mV
%
mV
%
mV
%
Typ
5.000
5.000
5.000
Max
5.003
5.006
5.010
Unit
V
V
V
ΔV
OUT
e
N p-p
e
N
After 1000 hours of operation @ 125°C
f = 0.1 Hz to 10 Hz
f = 1 kHz
V
S
= 6.0 V, T
A
= −25°C to +85°C, unless otherwise noted.
Table 3.
Parameter
TEMPERATURE COEFFICIENT
E Grade
F Grade
G Grade
LINE REGULATION
E, F Grades
G Grade
LOAD REGULATION
E, F Grades
G Grade
Symbol
TCV
OUT
Conditions
I
OUT
= 0 mA
Min
Typ
3
5
10
ΔV
OUT
/ΔV
IN
6.0 V to 15 V, I
OUT
= 0 mA
35
50
ΔV
OUT
/ΔI
LOAD
V
S
= 6.0 V, I
OUT
= 0 mA to 5 mA
20
30
150
200
ppm/mA
ppm/mA
150
200
ppm/V
ppm/V
Max
8
15
25
Unit
ppm/°C
ppm/°C
ppm/°C
Rev. D | Page 3 of 12
ADR293
V
S
= 6.0 V, T
A
= −40°C to +125°C, unless otherwise noted.
Table 4.
Parameter
TEMPERATURE COEFFICIENT
E Grade
F Grade
G Grade
LINE REGULATION
E, F Grades
G Grade
LOAD REGULATION
E, F Grades
G Grade
SUPPLY CURRENT
THERMAL HYSTERESIS
Symbol
TCV
OUT
Conditions
I
OUT
= 0 mA
Min
Typ
3
5
10
ΔV
OUT
/ΔV
IN
6.0 V to 15 V, I
OUT
= 0 mA
40
70
ΔV
OUT
/ΔI
LOAD
V
S
= 6.0 V, I
OUT
= 0 mA to 5 mA
20
30
11
15
72
157
200
300
15
20
ppm/mA
ppm/mA
μA
μA
ppm
ppm
200
250
ppm/V
ppm/V
Max
10
20
30
Unit
ppm/°C
ppm/°C
ppm/°C
I
S
V
OUT-HYS
@ 25°C
8-lead SOIC_N
8-lead TSSOP
Rev. D | Page 4 of 12
stm32/stm8
